All Classes (Apache Tomcat 9.0.102 API Documentation)

All Classes Interface Summary Class Summary Enum Summary Exception Summary Error Summary
Class	Description
AbandonedConfig	Configuration settings for abandoned object removal.
AbandonedTrace	Tracks connection usage for recovering and reporting abandoned connections.
AbsoluteOrder	Title: Membership - Absolute Order
AbsoluteOrder.AbsoluteComparator
AbstractAccessLogValve	Abstract implementation of the Valve interface that generates a web server access log with the detailed line contents matching a configurable pattern.
AbstractAccessLogValve.AccessLogElement	AccessLogElement writes the partial message into the buffer.
AbstractAccessLogValve.ByteSentElement	write bytes sent, excluding HTTP headers - %b, %B
AbstractAccessLogValve.CachedElement	Marks an AccessLogElement as needing to be have the value cached at the start of the request rather than just recorded at the end as the source data for the element may not be available at the end of the request.
AbstractAccessLogValve.ConnectionStatusElement	Write connection status when response is completed - %X
AbstractAccessLogValve.CookieElement	write a specific cookie - %{xxx}c
AbstractAccessLogValve.DateFormatCache	Cache structure for formatted timestamps based on seconds.
AbstractAccessLogValve.ElapsedTimeElement	write time taken to process the request - %D, %T
AbstractAccessLogValve.FirstByteTimeElement	write time until first byte is written (commit time) in millis - %F
AbstractAccessLogValve.HeaderElement	write incoming headers - %{xxx}i
AbstractAccessLogValve.HttpStatusCodeElement	write HTTP status code of the response - %s
AbstractAccessLogValve.LocalAddrElement	write local IP address - %A
AbstractAccessLogValve.LogicalUserNameElement	write remote logical username from identd (always returns '-') - %l
AbstractAccessLogValve.MethodElement	write request method (GET, POST, etc.) - %m
AbstractAccessLogValve.QueryElement	write Query string (prepended with a '?'
AbstractAccessLogValve.RequestAttributeElement	write an attribute in the ServletRequest - %{xxx}r
AbstractAccessLogValve.RequestElement	write first line of the request (method and request URI) - %r
AbstractAccessLogValve.RequestURIElement	write requested URL path - %U
AbstractAccessLogValve.ResponseHeaderElement	write a specific response header - %{xxx}o
AbstractAccessLogValve.SessionAttributeElement	write an attribute in the HttpSession - %{xxx}s
AbstractAccessLogValve.SessionIdElement	write user session ID - %S
AbstractAccessLogValve.StringElement	write any string
AbstractAccessLogValve.ThreadNameElement	write thread name - %I
AbstractAccessLogValve.UserElement	write remote user that was authenticated (if any), else '-' - %u
AbstractAjpProtocol<S>	The is the base implementation for the AJP protocol handlers.
AbstractArchiveResource
AbstractArchiveResourceSet
AbstractCatalinaCommandTask
AbstractCatalinaTask	Abstract base class for Ant tasks that interact with the Manager web application for dynamically deploying and undeploying applications.
AbstractChunk	Base class for the *Chunk implementation to reduce duplication.
AbstractCreateStatementInterceptor	Abstraction interceptor.
AbstractEndpoint<S,U>
AbstractEndpoint.BindState
AbstractEndpoint.Handler<S>
AbstractEndpoint.Handler.SocketState	Different types of socket states to react upon.
AbstractFileResourceSet
AbstractGroup	Convenience base class for `Group` implementations.
AbstractHttp11JsseProtocol<S>
AbstractHttp11Protocol<S>
AbstractInputStreamJar	Base implementation of Jar for implementations that use a JarInputStream to access the JAR file.
AbstractJsseEndpoint<S,U>
AbstractObjectCreationFactory	Abstract base class for `ObjectCreationFactory` implementations.
AbstractProcessor	Provides functionality and attributes common to all supported protocols (currently HTTP and AJP) for processing a single request/response.
AbstractProcessorLight	This is a light-weight abstract processor implementation that is intended as a basis for all Processor implementations from the light-weight upgrade processors to the HTTP/AJP processors.
AbstractProtocol<S>
AbstractProtocol.ConnectionHandler<S>
AbstractProtocol.RecycledProcessors
AbstractQueryReport	Abstract class that wraps statements and intercepts query executions.
AbstractRef
AbstractReplicatedMap<K,V>
AbstractReplicatedMap.MapEntry<K,V>
AbstractReplicatedMap.MapMessage
AbstractReplicatedMap.MapOwner
AbstractResource
AbstractResourceSet
AbstractRole	Convenience base class for `Role` implementations.
AbstractRxTask
AbstractSender
AbstractSingleArchiveResource
AbstractSingleArchiveResourceSet	Base class for a `WebResourceSet` based on a single, rather than nested, archive.
AbstractStreamProvider
AbstractUser	Convenience base class for `User` implementations.
AcceptEncoding
AcceptLanguage
Acceptor<U>
Acceptor.AcceptorState
AccessLog	Intended for use by a `Valve` to indicate that the `Valve` provides access logging.
AccessLogAdapter	A helper class that wraps several AccessLog instances.
AccessLogValve	This is a concrete implementation of `AbstractAccessLogValve` that outputs the access log to a file.
ActionCode	ActionCodes represent callbacks from the servlet container to the coyote connector.
ActionHook	Action hook.
Adapter	Adapter.
AddDefaultCharsetFilter	Filter that explicitly sets the default character set for media subtypes of the "text" type to ISO-8859-1, or another user defined character set.
AddDefaultCharsetFilter.ResponseWrapper	Wrapper that adds a character set for text media types if no character set is specified.
AddPortOffsetRule
Address	Deprecated. The scope of the APR/Native Library will be reduced in Tomcat 9.1.x / Tomcat Native 2.x and has been reduced in Tomcat 10.1.x / Tomcat Native 2.x onwards to only include those components required to provide OpenSSL integration with the NIO and NIO2 connectors.
AjpAprProtocol	Deprecated. The APR/Native Connector will be removed in Tomcat 9.1.x onwards and has been removed from Tomcat 10.1.x onwards.
AjpMessage	A single packet for communication between the web server and the container.
AjpNio2Protocol	This the NIO2 based protocol handler implementation for AJP.
AjpNioProtocol	This the NIO based protocol handler implementation for AJP.
AjpProcessor	AJP Processor implementation.
AnnotationElementValue
AnnotationEntry	Represents one annotation in the annotation table
Annotations	base class for annotations
AntCompiler	Main JSP compiler class.
AntCompiler.JasperAntLogger
AntCompiler.SystemLogHandler
ApplicationBufferHandler	Callback interface to be able to expand buffers when buffer overflow exceptions happen or to replace buffers
ApplicationContext	Standard implementation of `ServletContext` that represents a web application's execution environment.
ApplicationContextFacade	Facade object which masks the internal `ApplicationContext` object from the web application.
ApplicationFilterChain	Implementation of `javax.servlet.FilterChain` used to manage the execution of a set of filters for a particular request.
ApplicationFilterConfig	Implementation of a `javax.servlet.FilterConfig` useful in managing the filter instances instantiated when a web application is first started.
ApplicationFilterFactory	Factory for the creation and caching of Filters and creation of Filter Chains.
ApplicationFilterRegistration
ApplicationMapping
ApplicationParameter	Representation of a context initialization parameter that is configured in the server configuration file, rather than the application deployment descriptor.
ApplicationPart	Adaptor to allow `FileItem` objects generated by the package renamed commons-upload to be used by the Servlet 3.0 upload API that expects `Part`s.
ApplicationPushBuilder
ApplicationServletRegistration
ApplicationSessionCookieConfig
AprEndpoint	Deprecated. The APR/Native Connector will be removed in Tomcat 9.1.x onwards and has been removed from Tomcat 10.1.x onwards.
AprEndpoint.AprSocketWrapper
AprEndpoint.SendfileData	SendfileData class.
AprEndpoint.SocketInfo
AprEndpoint.SocketList
AprEndpoint.SocketTimeouts
AprLifecycleListener	Implementation of `LifecycleListener` that will init and and destroy APR.
AprSSLSupport	Deprecated. The APR/Native Connector will be removed in Tomcat 9.1.x onwards and has been removed from Tomcat 10.1.x onwards.
AprStatus	Holds APR status without the need to load other classes.
Arg
ArrayElementValue
Arrays
ArrayStack<E>	Imported copy of the `ArrayStack` class from Commons Collections, which was the only direct dependency from Digester.
Ascii	This class implements some basic ASCII character handling functions.
Asn1Parser	This is a very basic ASN.1 parser that provides the limited functionality required by Tomcat.
Asn1Writer
AsyncChannelGroupUtil	This is a utility class that enables multiple `WsWebSocketContainer` instances to share a single `AsynchronousChannelGroup` while ensuring that the group is destroyed when no longer required.
AsyncChannelWrapper	This is a wrapper for a `AsynchronousSocketChannel` that limits the methods available thereby simplifying the process of implementing SSL/TLS support since there are fewer methods to intercept.
AsyncChannelWrapperNonSecure	Generally, just passes calls straight to the wrapped `AsynchronousSocketChannel`.
AsyncChannelWrapperSecure	Wraps the `AsynchronousSocketChannel` with SSL/TLS.
AsyncContextCallback	Provides a mechanism for the Coyote connectors to communicate with the `AsyncContext`.
AsyncContextImpl
AsyncDispatcher
AsyncFileHandler	A `FileHandler` implementation that uses a queue of log entries.
AsyncListenerWrapper
AttributeInfo	Internal configuration information for an `Attribute` descriptor.
AttributeParser	Converts a JSP attribute value into the unquoted equivalent.
AuthConfigFactoryImpl
AuthenticatedUserRealm	This Realm is intended for use with Authenticator implementations (`SSLAuthenticator`, `SpnegoAuthenticator`) that authenticate the user as well as obtain the user credentials.
Authentication
AuthenticationException	Exception thrown on authentication error connecting to a remote websocket endpoint.
AuthenticationType
Authenticator	An Authenticator is a component (usually a Valve or Container) that provides some sort of authentication service.
Authenticator	Base class for the authentication methods used by the WebSocket client.
AuthenticatorBase	Basic implementation of the Valve interface that enforces the `<security-constraint>` elements in the web application deployment descriptor.
AuthenticatorBase.AllowCorsPreflight
AuthenticatorFactory	Utility method to return the appropriate authenticator according to the scheme that the server uses.
Authorization	Parser for an "Authorization" header.
B2CConverter	NIO based character decoder.
BackgroundProcess
BackgroundProcessManager	Provides a background processing mechanism that triggers roughly once a second.
BackupManager
BadRequestException	Extend IOException to identify it as being caused by a bad request from a remote client.
Base64	Deprecated. Unused.
BaseAttributeFilter	Implementation of `NotificationFilter` for attribute change notifications.
BaseCatalinaMBean<T>
BaseGenericObjectPool<T>	Base class that provides common functionality for `GenericObjectPool` and `GenericKeyedObjectPool`.
BaseModelMBean	Basic implementation of the `DynamicMBean` interface, which supports the minimal requirements of the interface contract.
BaseNCodec	Deprecated. Unused.
BaseNotificationBroadcaster	Implementation of `NotificationBroadcaster` for attribute change notifications.
BaseObject	A base class for common functionality.
BaseObjectPool<T>	A simple base implementation of `ObjectPool`.
BaseObjectPoolConfig<T>	Provides the implementation for the common attributes shared by the sub-classes.
BaseRedirectorHelperTask	Abstract base class to add output redirection support for Catalina Ant tasks.
BaseSessionComparator<T>	Deprecated. Unused.
BasicAuthenticator	An Authenticator and Valve implementation of HTTP BASIC Authentication, as outlined in RFC 7617: "The 'Basic' HTTP Authentication Scheme"
BasicAuthenticator	Authenticator supporting the BASIC authentication method.
BasicAuthenticator.BasicCredentials	Parser for an HTTP Authorization header for BASIC authentication as per RFC 2617 section 2, and the Base64 encoded credentials as per RFC 2045 section 6.8.
BasicDataSource	Basic implementation of `javax.sql.DataSource` that is configured via JavaBeans properties.
BasicDataSourceFactory	JNDI object factory that creates an instance of `BasicDataSource` that has been configured based on the `RefAddr` values of the specified `Reference`, which must match the names and data types of the `BasicDataSource` bean properties with the following exceptions: `connectionInitSqls` must be passed to this factory as a single String using semicolon to delimit the statements whereas `BasicDataSource` requires a collection of Strings.
BasicDataSourceMXBean	Interface to keep API compatibility.
BasicManagedDataSource	BasicManagedDataSource is an extension of BasicDataSource which creates ManagedConnections.
BeanFactory	Object factory for any Resource conforming to the JavaBean spec.
BeanRepository	Repository of {page, request, session, application}-scoped beans
BIOCallback	Deprecated. Unused.
BioReceiver	Deprecated. This will be removed in Tomcat 10
BioReplicationTask	Deprecated. This will be removed in Tomcat 10
BioSender	Deprecated. This will be removed in Tomcat 10
BodyContentImpl	Write text to a character-output stream, buffering characters so as to provide for the efficient writing of single characters, arrays, and strings.
Bootstrap	Bootstrap loader for Catalina.
Buffer	Provides utilities related to the use of directly allocated `ByteBuffer` instances with native code.
BufferedInputFilter	Input filter responsible for reading and buffering the request body, so that it does not interfere with client SSL handshake messages.
BufferPool
BufferPool.BufferPoolAPI
ByteArrayOutputStream	This class implements an output stream in which the data is written into a byte array.
ByteArrayServletOutputStream	Class that extends ServletOutputStream, used as a wrapper from within `SsiInclude`
ByteBufferHolder	Simple wrapper for a `ByteBuffer` that remembers if the buffer has been flipped or not.
ByteBufferUtils
ByteChunk	This class is used to represent a chunk of bytes, and utilities to manipulate byte[].
ByteChunk.BufferOverflowException
ByteChunk.ByteInputChannel	Input interface, used when the buffer is empty.
ByteChunk.ByteOutputChannel	When we need more space we'll either grow the buffer ( up to the limit ) or send it to a channel.
ByteMessage	A byte message is not serialized and deserialized by the channel instead it is sent as a byte array.
C2BConverter	NIO based character encoder.
Cache
CachedResource	This class is designed to wrap a 'raw' WebResource and providing caching for expensive operations.
CallbackHandlerImpl	Default implementation of a JASPIC CallbackHandler.
CallMethodRule	Rule implementation that calls a method on an object on the stack (normally the top/parent object), passing arguments collected from subsequent `CallParamRule` rules or from the body of this element.
CallParamRule	Rule implementation that saves a parameter for use by a surrounding `CallMethodRule`.
CallStack	Strategy for obtaining and printing the current call stack.
CallStackUtils	Utility methods for `CallStack`.
CaseInsensitiveKeyMap<V>	A Map implementation that uses case-insensitive (using `Locale.ENGLISH`) strings as keys.
Catalina	Startup/Shutdown shell program for Catalina.
Catalina.ServerXml
CatalinaBaseConfigurationSource
CatalinaCluster	A CatalinaCluster interface allows to plug in and out the different cluster implementations
CatalinaClusterSF	Generate Cluster Element with Membership,Sender,Receiver,Deployer and ReplicationValve
CatalinaProperties	Utility class to read the bootstrap Catalina configuration.
Catch
CertificateCreateRule	Rule implementation that creates an SSLHostConfigCertificate.
CertificateStoreAppender	Store the Certificate attributes.
CertificateStreamProvider
CertificateVerifier	Is called during handshake and hooked into openssl via `SSL_CTX_set_cert_verify_callback`.
CGIServlet	CGI-invoking servlet for web applications, used to execute scripts which comply to the Common Gateway Interface (CGI) specification and are named in the path-info used to invoke this servlet.
CGIServlet.HTTPHeaderInputStream	This is an input stream specifically for reading HTTP headers.
Channel	A channel is a representation of a group of nodes all participating in some sort of communication with each other.
ChannelCoordinator	The channel coordinator object coordinates the membership service, the sender and the receiver.
ChannelData	The `ChannelData` object is used to transfer a message through the channel interceptor stack and eventually out on a transport to be sent to another node.
ChannelException	A channel exception is thrown when an internal error happens somewhere in the channel.
ChannelException.FaultyMember	Represent a failure to a specific member when a message was sent to more than one member
ChannelInterceptor	A ChannelInterceptor is an interceptor that intercepts messages and membership messages in the channel stack.
ChannelInterceptor.InterceptorEvent
ChannelInterceptorBase	Abstract class for the interceptor base class.
ChannelListener	An interface to listens to incoming messages from a channel.
ChannelMessage	Message that is passed through the interceptor stack after the data serialized in the Channel object and then passed down to the interceptor and eventually down to the ChannelSender component.
ChannelReceiver	The `ChannelReceiver` interface is the data receiver component at the bottom layer, the IO layer (for layers see the `Channel` interface).
ChannelSender	The `ChannelSender` interface is the data sender component at the bottom layer, the IO layer (for layers see the `Channel` interface).
ChannelSF	Generate Channel Element
CharChunk	Utilities to manipulate char chunks.
CharChunk.CharInputChannel	Input interface, used when the buffer is empty.
CharChunk.CharOutputChannel	When we need more space we'll either grow the buffer ( up to the limit ) or send it to a channel.
CharsetCache
CharsetMapper	Utility class that attempts to map from a Locale to the corresponding character set to be used for interpreting input text (or generating output text) when the Content-Type header does not include one.
CharsetUtil
CheckEol	Ant task that checks that all the files in the given fileset have end-of-line delimiters that are appropriate.
Choose
ChunkedInputFilter	Chunked input filter.
ChunkedOutputFilter	Chunked output filter.
Cipher	All the standard cipher suites for SSL/TSL.
ClassElementValue
ClassFormatException	Thrown when the BCEL attempts to read a class file and determines that a class is malformed or otherwise cannot be interpreted as a class file.
ClassLoaderFactory	Utility class for building class loaders for Catalina.
ClassLoaderFactory.Repository
ClassLoaderFactory.RepositoryType
ClassLoaderLogManager	Per classloader LogManager implementation.
ClassLoaderLogManager.ClassLoaderLogInfo
ClassLoaderLogManager.LogNode
ClassLoaderLogManager.RootLogger	This class is needed to instantiate the root of each per classloader hierarchy.
ClassLoaderUtil
ClassNameMBean<T>	A convenience base class for ModelMBean implementations where the underlying base class (and therefore the set of supported properties) is different for varying implementations of a standard interface.
ClassParser	Wrapper class that parses a given Java .class file.
ClasspathURLStreamHandler
ClientAbortException	Extend IOException to identify it as being caused by an abort of a request by a remote client.
ClientEndpointHolder
Closeable	Interface of an object, which may be closed.
CloseNowException	This exception is thrown to signal to the Tomcat internals that an error has occurred that requires the connection to be closed.
CloudMembershipProvider
CloudMembershipService	A `MembershipService` that uses Kubernetes API(default) or DNS to retrieve the members of a cluster.
CloudMembershipServiceMBean
Cluster	A Cluster works as a Cluster client/server for the local host Different Cluster implementations can be used to support different ways to communicate within the Cluster.
ClusterDeployer	A ClusterDeployer interface allows to plug in and out the different deployment implementations
ClusterListener	Receive SessionID cluster change from other backup node after primary session node is failed.
ClusterManager	The common interface used by all cluster manager.
ClusterManagerBase
ClusterMessage
ClusterMessageBase
ClusterRuleSet	RuleSet for processing the contents of a Cluster definition element.
ClusterSession
ClusterSessionListener	Receive replicated SessionMessage form other cluster node.
ClusterSingleSignOn	A Valve that supports a "single sign on" user experience on each nodes of a cluster, where the security identity of a user who successfully authenticates to one web application is propagated to other web applications and to other nodes cluster in the same security domain.
ClusterSingleSignOnListener	Cluster extension of `SingleSignOnListener` that simply adds the marker interface `ReplicatedSessionListener` which allows the listener to be replicated across the cluster along with the session.
ClusterValve	Cluster valves are a simple extension to the Tomcat valve architecture with a small addition of being able to reference the cluster component in the container it sits in.
CollectedInfo
CombinedRealm	Realm implementation that contains one or more realms.
Compiler	Main JSP compiler class.
CompressionConfig
ConcurrentCache<K,V>
ConcurrentCache<K,V>
ConcurrentDateFormat	Deprecated. Unused.
ConcurrentDateFormat	A thread safe wrapper around `SimpleDateFormat` that does not make use of ThreadLocal and - broadly - only creates enough SimpleDateFormat objects to satisfy the concurrency requirements.
ConcurrentLruCache<T>
ConcurrentMessageDigest	A thread safe wrapper around `MessageDigest` that does not make use of ThreadLocal and - broadly - only creates enough MessageDigest objects to satisfy the concurrency requirements.
ConfigFileLoader	This class is used to obtain `InputStream`s for configuration files from a given location String.
ConfigurationSource	Abstracts configuration file storage.
ConfigurationSource.Resource	Represents a resource: a stream to the resource associated with its URI.
ConnectionFactory	Abstract factory interface for creating `Connection`s.
ConnectionPool	Implementation of simple connection pool.
ConnectionPool
ConnectionPool.PoolCleaner
ConnectionPoolMBean
ConnectionState	Interceptor that keep track of connection state to avoid roundtrips to the database.
Connector	Implementation of a Coyote connector.
ConnectorCreateRule	Rule implementation that creates a connector.
ConnectorMBean	A ModelMBean implementation for the `org.apache.coyote.tomcat5.CoyoteConnector` component.
ConnectorSF	Store Connector and Listeners
ConnectorStoreAppender	Store the Connector attributes.
Const	Constants for the project, mostly defined in the JVM specification.
Constant	Abstract superclass for classes to represent the different constant types in the constant pool of a class file.
ConstantClass	This class is derived from the abstract `Constant` and represents a reference to a (external) class.
ConstantDouble	This class is derived from the abstract `Constant` and represents a reference to a Double object.
ConstantFloat	This class is derived from the abstract `Constant` and represents a reference to a float object.
ConstantInteger	This class is derived from the abstract `Constant` and represents a reference to an int object.
ConstantLong	This class is derived from the abstract `Constant` and represents a reference to a long object.
ConstantPool	This class represents the constant pool, i.e., a table of constants, of a parsed classfile.
Constants
Constants
Constants	Manifest constants for this Java package.
Constants	Manifest constants for the `org.apache.catalina.ha.tcp` package.
Constants
Constants
Constants
Constants	Static constants for this package.
Constants
Constants	Deprecated.
Constants	Manifest constants for the `org.apache.catalina.session` package.
Constants	String constants for the startup package.
Constants
Constants	Manifest constants for the `org.apache.catalina.tribes.membership` package.
Constants	Manifest constants for the `org.apache.catalina.tribes.transport` package.
Constants	Manifest constants for this Java package.
Constants	Manifest constants for the `org.apache.catalina.valves` package.
Constants	Constants.
Constants	Constants.
Constants	Constants.
Constants
Constants	Some constants and other global data that are used by the compiler and the runtime.
Constants	Static constants for this package.
Constants
Constants	Constants.
Constants
Constants
Constants
Constants	String constants for the scan package.
Constants	Static constants for this package.
Constants	Internal implementation constants.
Constants	Internal implementation constants.
Constants	Internal implementation constants.
Constants.AccessLog
ConstantUtf8	Extends the abstract `Constant` to represent a reference to a UTF-8 encoded string.
Contained	Decoupling interface which specifies that an implementing class is associated with at most one Container instance.
Container	A Container is an object that can execute requests received from a client, and return responses based on those requests.
ContainerBase	Abstract implementation of the Container interface, providing common functionality required by nearly every implementation.
ContainerEvent	General event for notifying listeners of significant changes on a Container.
ContainerListener	Interface defining a listener for significant Container generated events.
ContainerMBean
ContainerServlet	A ContainerServlet is a servlet that has access to Catalina internal functionality, and is loaded from the Catalina class loader instead of the web application class loader.
ContainerThreadMarker	Deprecated. Unused.
ContainerThreadMarker	Deprecated. Unused.
ContentRange
Context	A Context is a Container that represents a servlet context, and therefore an individual web application, in the Catalina servlet engine.
ContextAccessController	Handles the access control on the JNDI contexts.
ContextBind
ContextBindings	Handles the associations : Object with a NamingContext Calling thread with a NamingContext Calling thread with object bound to the same naming context Thread context class loader with a NamingContext Thread context class loader with object bound to the same NamingContext The objects are typically Catalina Server or Context objects.
ContextConfig	Startup event listener for a Context that configures the properties of that Context, and the associated defined servlets.
ContextConfig.ContextXml
ContextEjb	Representation of an EJB resource reference for a web application, as represented in a `<ejb-ref>` element in the deployment descriptor.
ContextEnvironment	Representation of an application environment entry, as represented in an `<env-entry>` element in the deployment descriptor.
ContextEnvironmentMBean	A ModelMBean implementation for the `org.apache.tomcat.util.descriptor.web.ContextEnvironment` component.
ContextHandler	Representation of a handler reference for a web service, as represented in a `<handler>` element in the deployment descriptor.
ContextLocalEjb	Representation of a local EJB resource reference for a web application, as represented in a `<ejb-local-ref>` element in the deployment descriptor.
ContextMBean
ContextName	Utility class to manage context names so there is one place where the conversions between baseName, path and version take place.
ContextNamingInfoListener	Implementation of `LifecycleListener` that will create context naming information environment entries.
ContextResource	Representation of a resource reference for a web application, as represented in a `<resource-ref>` element in the deployment descriptor.
ContextResourceEnvRef	Representation of an application resource reference, as represented in an `<res-env-refy>` element in the deployment descriptor.
ContextResourceLink	Representation of a resource link for a web application, as represented in a `<ResourceLink>` element in the server configuration file.
ContextResourceLinkMBean	A ModelMBean implementation for the `org.apache.tomcat.util.descriptor.web.ContextResourceLink` component.
ContextResourceMBean	A ModelMBean implementation for the `org.apache.tomcat.util.descriptor.web.ContextResource` component.
ContextRuleSet	RuleSet for processing the contents of a Context definition element.
ContextService	Representation of a web service reference for a web application, as represented in a `<service-ref>` element in the deployment descriptor.
ContextTransaction	Representation of an application resource reference, as represented in an `<res-env-refy>` element in the deployment descriptor.
ContinueResponseTiming	Defines timing options for responding to requests that contain a '100-continue' expectations.
Cookie	Cookie header parser based on RFC6265 and RFC2109.
CookieProcessor
CookieProcessorBase
CookiesWithoutEquals
CopyParentClassLoaderRule	Rule that copies the `parentClassLoader` property from the next-to-top item on the stack (which must be a `Container`) to the top item on the stack (which must also be a `Container`).
CorsFilter	A `Filter` that enable client-side cross-origin requests by implementing W3C's CORS (Cross-Origin Resource Sharing) specification for resources.
CorsFilter.CORSRequestType	Enumerates varies types of CORS requests.
CoyoteAdapter	Implementation of a request processor which delegates the processing to a Coyote processor.
CoyoteInputStream	This class handles reading bytes.
CoyoteOutputStream	Coyote implementation of the servlet output stream.
CoyotePrincipal	Generic implementation of java.security.Principal that is used to represent principals authenticated at the protocol handler level.
CoyoteReader	Coyote implementation of the buffered reader.
CoyoteWriter	Coyote implementation of the servlet writer.
CrawlerSessionManagerValve	Web crawlers can trigger the creation of many thousands of sessions as they crawl a site which may result in significant memory consumption.
CredentialHandler	This interface is used by the `Realm` to compare the user provided credentials with the credentials stored in the `Realm` for that user.
CredentialHandlerRuleSet	RuleSet for processing the contents of a CredentialHandler definition element.
CredentialHandlerSF	Store server.xml Element CredentialHandler
CsrfPreventionFilter	Provides basic CSRF protection for a web application.
CsrfPreventionFilter.CsrfResponseWrapper
CsrfPreventionFilter.LruCache<T>	Despite its name, this is a FIFO cache not an LRU cache.
CsrfPreventionFilter.MimePredicate	A no-nonce Predicate that evaluates a MIME type instead of a URL.
CsrfPreventionFilter.NonceCache<T>
CsrfPreventionFilter.PatternPredicate	A no-nonce Predicate that matches a regular expression.
CsrfPreventionFilter.PrefixPredicate	A no-nonce Predicate that matches a prefix.
CsrfPreventionFilter.SuffixPredicate	A no-nonce Predicate that matches a suffix.
CsrfPreventionFilterBase
CustomObjectInputStream	Custom subclass of `ObjectInputStream` that loads from the class loader for this web application.
DataSender
DataSource	A DataSource that can be instantiated through IoC and implements the DataSource interface since the DataSourceProxy is used as a generic proxy.
DataSourceConnectionFactory	A `DataSource`-based implementation of `ConnectionFactory`.
DataSourceFactory	JNDI object factory that creates an instance of `BasicDataSource` that has been configured based on the `RefAddr` values of the specified `Reference`, which must match the names and data types of the `BasicDataSource` bean properties.
DataSourceLinkFactory	Object factory for resource links for shared data sources.
DataSourceLinkFactory.DataSourceHandler	Simple wrapper class that will allow a user to configure a ResourceLink for a data source so that when `DataSource.getConnection()` is called, it will invoke `DataSource.getConnection(String, String)` with the preconfigured username and password.
DataSourceMXBean	Defines the methods that will be made available via JMX.
DataSourcePropertyStore	WebDAV dead properties storage using a DataSource.
DataSourceProxy	The DataSource proxy lets us implements methods that don't exist in the current compiler JDK but might be methods that are part of a future JDK DataSource interface.
DataSourceRealm	Implementation of Realm that works with any JDBC JNDI DataSource.
DataSourceStore	Implementation of the `Store` interface that stores serialized session objects in a database.
DataSourceUserDatabase	UserDatabase backed by a data source.
DataSourceUserDatabaseFactory	JNDI object creation factory for `DataSourceUserDatabase` instances.
DataSourceUserDatabaseMBean	A ModelMBean implementation for the `org.apache.catalina.users.DataSourceUserDatabase` component.
DataSourceXAConnectionFactory	An implementation of XAConnectionFactory which uses a real XADataSource to obtain connections and XAResources.
DateFormatCache	Cache structure for SimpleDateFormat formatted timestamps based on seconds.
DecoderEntry
DefaultEvictionPolicy<T>	Provides the default implementation of `EvictionPolicy` used by the pools.
DefaultInstanceManager
DefaultPooledObject<T>	This wrapper is used to track the additional information, such as state, for the pooled objects.
DefaultPooledObjectInfo	Implements providing information on pooled objects via JMX.
DefaultPooledObjectInfoMBean	The interface that defines the information about pooled objects that will be exposed via JMX.
DefaultServerEndpointConfigurator
DefaultServlet	The default resource-serving servlet for most web applications, used to serve static resources such as HTML pages and images.
DefaultServlet.CompressionFormat
DefaultServlet.Range
DeferredFileOutputStream	An output stream which will retain data in memory until a specified threshold is reached, and only then commit it to disk.
DelegatingCallableStatement	A base delegating implementation of `CallableStatement`.
DelegatingConnection<C extends java.sql.Connection>	A base delegating implementation of `Connection`.
DelegatingDatabaseMetaData	A base delegating implementation of `DatabaseMetaData`.
DelegatingPreparedStatement	A base delegating implementation of `PreparedStatement`.
DelegatingResultSet	A base delegating implementation of `ResultSet`.
DelegatingStatement	A base delegating implementation of `Statement`.
DeltaManager	The DeltaManager manages replicated sessions by only replicating the deltas in data.
DeltaRequest	This class is used to track the series of actions that happens when a request is executed.
DeltaSession	Similar to the StandardSession except that this session will keep track of deltas during a request.
DeployTask	Ant task that implements the `/deploy` command, supported by the Tomcat manager application.
DeployXmlPermission	Grant this permission to a docBase to permit the web application to use any `META-INF/context.xml` that might be present with in the application when `deployXML` has been disabled at the Host level.
DestroyMode	Destroy context provided to object factories via `destroyObject` and `invalidateObject` methods.
Diagnostics
DigestAuthenticator	An Authenticator and Valve implementation of HTTP DIGEST Authentication, as outlined in RFC 7616: "HTTP Digest Authentication"
DigestAuthenticator	Authenticator supporting the DIGEST authentication method.
DigestAuthenticator.AuthDigest	This enum exists because RFC 7616 and Java use different names for some digests.
DigestAuthenticator.DigestInfo
DigestAuthenticator.NonceInfo
DigestCredentialHandlerBase	Base implementation for the Tomcat provided `CredentialHandler`s.
Digester	A Digester processes an XML input stream by matching a series of element nesting patterns to execute Rules that have been added prior to the start of parsing.
Digester.EnvironmentPropertySource	Deprecated. Use `EnvironmentPropertySource` This will be removed in Tomcat 10 onwards.
Digester.GeneratedCodeLoader
DigesterFactory	Wrapper class around the Digester that hide Digester's initialization details.
DirectByteArrayOutputStream	Byte array output stream that exposes the byte array directly
Directory	Deprecated. The scope of the APR/Native Library will be reduced in Tomcat 9.1.x / Tomcat Native 2.x and has been reduced in Tomcat 10.1.x / Tomcat Native 2.x onwards to only include those components required to provide OpenSSL integration with the NIO and NIO2 connectors.
DirResourceSet	Represents a `WebResourceSet` based on a directory.
DiskFileItem	The default implementation of the `FileItem` interface.
DiskFileItemFactory	The default `FileItemFactory` implementation.
DispatchType	This enumeration lists the different types of dispatches that request processing can trigger.
DisposableConnectionFacade	A DisposableConnectionFacade object is the top most interceptor that wraps an object of type `PooledConnection`.
DistributedManager	Interface implemented by session managers that do not keep a complete copy of all sessions in memory but do know where every session is.
DNSMembershipProvider	A `MembershipProvider` that uses DNS to retrieve the members of a cluster.
DocumentProperties	A collection of interfaces, one per property, that enables the object being populated by the digester to signal to the digester that it supports the given property and that the digester should populate that property if available.
DocumentProperties.Charset	The character encoding used by the source XML document.
DomainFilterInterceptor	Filters membership based on domain.
DomainFilterInterceptorMBean
DOMWriter	A DOM writer optimised for use by WebDAV.
DriverAdapterCPDS	An adapter for JDBC drivers that do not include an implementation of `ConnectionPoolDataSource`, but still include a `DriverManager` implementation.
DriverConnectionFactory	A `Driver`-based implementation of `ConnectionFactory`.
DriverManagerConnectionFactory	A `DriverManager`-based implementation of `ConnectionFactory`.
DummyProxySession
EjbFactory	Object factory for EJBs.
EjbRef	Represents a reference address to an EJB.
ELArithmetic	A helper class of Arithmetic defined by the EL Specification
ELArithmetic.BigDecimalDelegate
ELArithmetic.BigIntegerDelegate
ELArithmetic.DoubleDelegate
ELArithmetic.LongDelegate
ELContextImpl	Implementation of ELContext
ELContextWrapper	Simple ELContextWrapper for runtime evaluation of EL w/ dynamic FunctionMappers
ElementValue	The element_value structure is documented at https://docs.oracle.com/javase/specs/jvms/se11/html/jvms-4.html#jvms-4.7.16.1
ElementValuePair	An annotation's element value pair.
ELFunctionMapper	This class generates functions mappers for the EL expressions in the page.
ELInterpreter	Defines the interface for the expression language interpreter.
ELInterpreterFactory	Provides `ELInterpreter` instances for JSP compilation.
ELInterpreterFactory.DefaultELInterpreter
ELInterpreterTagSetters	A non-specification compliant `ELInterpreter` that optimizes a subset of setters for tag attributes.
ELParser	This class implements a parser for EL expressions.
ELResolverImpl	Deprecated.
ELSupport	A helper class that implements the EL Specification
EmbeddedServletOptions	A class to hold all init parameters specific to the JSP engine.
EmptyResource
EmptyResourceSet	A `WebResourceSet` implementation that is not backed by a file system and behaves as if it has no resources available.
EncodedSolidusHandling
EncryptInterceptor	Adds encryption using a pre-shared key.
EncryptInterceptorMBean
Encryption
EncryptionLevel
EndpointClassHolder
EndpointHolder
Engine	An Engine is a Container that represents the entire Catalina servlet engine.
EngineConfig	Startup event listener for an Engine that configures the properties of that Engine, and the associated defined contexts.
EngineRuleSet	RuleSet for processing the contents of a Engine definition element.
EntityTag
EnumElementValue
EnvironmentPropertySource	A `IntrospectionUtils.SecurePropertySource` that uses environment variables to resolve expressions.
Error	Deprecated. Unused.
ErrorDispatcher	Class responsible for dispatching JSP parse and javac compilation errors to the configured error handler.
ErrorHandler	The `ErrorHandler` class is used when sending messages that are sent asynchronously and the application still needs to get confirmation when the message was sent successfully or when a message errored out.
ErrorHandler	Interface for handling JSP parse and javac compilation errors.
ErrorPage	Representation of an error page element for a web application, as represented in a `<error-page>` element in the deployment descriptor.
ErrorPageSupport	Provides support for tracking per exception type and per HTTP status code error pages.
ErrorReportValve	Implementation of a Valve that outputs HTML error pages.
ErrorState
Escape	Provides utility methods to escape content for different contexts.
EvaluationContext
EvictionConfig	This class is used by pool implementations to pass configuration information to `EvictionPolicy` instances.
EvictionPolicy<T>	To provide a custom eviction policy (i.e. something other than `DefaultEvictionPolicy` for a pool, users must provide an implementation of this interface that provides the required eviction policy.
ExceptionUtils	Utilities for handling Throwables and Exceptions.
ExceptionUtils	Utilities for handling Throwables and Exceptions.
ExceptionUtils	Utilities for handling Throwables and Exceptions.
ExceptionUtils	Utilities for handling Throwables and Exceptions.
Executor
ExecutorFactory
ExpandWar	Expand out a WAR in a Host's appBase.
ExpiresFilter	ExpiresFilter is a Java Servlet API port of Apache mod_expires to add '`Expires`' and '`Cache-Control: max-age=`' headers to HTTP response according to its '`Content-Type`'.
ExpiresFilter.Duration	Duration composed of an `ExpiresFilter.Duration.amount` and a `ExpiresFilter.Duration.unit`
ExpiresFilter.DurationUnit	Duration unit
ExpiresFilter.ExpiresConfiguration	Main piece of configuration of the filter.
ExpiresFilter.StartingPoint	Expiration configuration starting point.
ExpressionBuilder
ExpressionEvaluatorImpl	Deprecated.
ExpressionFactoryImpl
ExpressionImpl	Deprecated.
ExpressionParseTree	Represents a parsed expression.
ExpressionTokenizer	Parses an expression string to return the individual tokens.
ExtendedAccessLogValve	An implementation of the W3c Extended Log File Format.
ExtendedAccessLogValve.CookieElement
ExtendedAccessLogValve.DateElement
ExtendedAccessLogValve.PatternTokenizer
ExtendedAccessLogValve.RequestAttributeElement
ExtendedAccessLogValve.RequestHeaderElement
ExtendedAccessLogValve.RequestParameterElement
ExtendedAccessLogValve.ResponseAllHeaderElement	write a specific response header - x-O(xxx)
ExtendedAccessLogValve.ResponseHeaderElement
ExtendedAccessLogValve.ServletContextElement
ExtendedAccessLogValve.SessionAttributeElement
ExtendedAccessLogValve.TimeElement
ExtendedRpcCallback	Extension to the `RpcCallback` interface.
Extension	Utility class that represents either an available "Optional Package" (formerly known as "Standard Extension") as described in the manifest of a JAR file, or the requirement for such an optional package.
ExtensionValidator	Ensures that all extension dependencies are resolved for a WEB application are met.
ExtractingRoot	If the main resources are packaged as a WAR file then any JARs will be extracted to the work directory and used from there.
FactoryBase	Abstract base class that provides common functionality required by sub-classes.
FactoryCreateRule	Rule implementation that uses an `ObjectCreationFactory` to create a new object which it pushes onto the object stack.
FailedContext	An implementation of `Context` that is used as a place-holder for deployed applications when their deployment fails and a Context instance (usually `StandardContext` but may be any Context implementation) cannot be created.
FailedRequestFilter	Filter that will reject requests if there was a failure during parameter parsing.
FairBlockingQueue<E>	A simple implementation of a blocking queue with fairness waiting.
FarmWarDeployer	A farm war deployer is a class that is able to deploy/undeploy web applications in WAR from within the cluster.
FastHttpDateFormat	Utility class to generate HTTP dates.
FastRateLimiter	A RateLimiter that compromises accuracy for speed in order to provide maximum throughput.
FastRemovalDequeue<T>	The FastRemovalDequeue is a Dequeue that supports constant time removal of entries.
FeatureInfo	Convenience base class for `AttributeInfo` and `OperationInfo` classes that will be used to collect configuration information for the `ModelMBean` beans exposed for management.
File	Deprecated. The scope of the APR/Native Library will be reduced in Tomcat 9.1.x / Tomcat Native 2.x and has been reduced in Tomcat 10.1.x / Tomcat Native 2.x onwards to only include those components required to provide OpenSSL integration with the NIO and NIO2 connectors.
FileChangeListener
FileCountLimitExceededException	This exception is thrown if a request contains more files than the specified limit.
FileHandler	Implementation of Handler that appends log messages to a file named {prefix}{date}{suffix} in a configured directory.
FileHandler.ThreadFactory
FileInfo	Deprecated. The scope of the APR/Native Library will be reduced in Tomcat 9.1.x / Tomcat Native 2.x and has been reduced in Tomcat 10.1.x / Tomcat Native 2.x onwards to only include those components required to provide OpenSSL integration with the NIO and NIO2 connectors.
FileItem	This class represents a file or form item that was received within a `multipart/form-data` POST request.
FileItemFactory	A factory interface for creating `FileItem` instances.
FileItemHeaders	This class provides support for accessing the headers for a file or form item that was received within a `multipart/form-data` POST request.
FileItemHeadersImpl	Default implementation of the `FileItemHeaders` interface.
FileItemHeadersSupport	Interface that will indicate that `FileItem` or `FileItemStream` implementations will accept the headers read for the item.
FileItemIterator	An iterator, as returned by `FileUploadBase.getItemIterator(RequestContext)`.
FileItemIteratorImpl	The iterator, which is returned by `FileUploadBase.getItemIterator(RequestContext)`.
FileItemStream	This interface provides access to a file or form item that was received within a `multipart/form-data` POST request.
FileItemStream.ItemSkippedException	This exception is thrown, if an attempt is made to read data from the `InputStream`, which has been returned by `FileItemStream.openStream()`, after `Iterator.hasNext()` has been invoked on the iterator, which created the `FileItemStream`.
FileItemStreamImpl	Default implementation of `FileItemStream`.
FileMessage	Contains the data for a file being transferred over TCP, this is essentially a fragment of a file, read and written by the FileMessageFactory.
FileMessageFactory	This factory is used to read files and write files by splitting them up into smaller messages.
FileResource	Represents a single resource (file or directory) that is located on a file system.
FileResourceSet	Represents a `WebResourceSet` based on a single file.
FileSizeLimitExceededException	Thrown to indicate that A files size exceeds the configured maximum.
FileStore	Concrete implementation of the Store interface that utilizes a file per saved Session in a configured directory.
FileUpload	High level API for processing file uploads.
FileUploadBase	High level API for processing file uploads.
FileUploadException	Exception for errors encountered while processing the request.
FileUploadIOException	This exception is thrown for hiding an inner `FileUploadException` in an `IOException`.
FileUtils	General file manipulation utilities.
FilterBase	Base class for filters that provides generic initialisation and a simple no-op destruction.
FilterDef	Representation of a filter definition for a web application, as represented in a `<filter>` element in the deployment descriptor.
FilterMap	Representation of a filter mapping for a web application, as represented in a `<filter-mapping>` element in the deployment descriptor.
FilterUtil	General purpose utility methods related to filters and filter processing.
FindLeaksTask	Ant task that implements the `/findleaks` command, supported by the Tomcat manager application.
ForceUtcTimeZone
ForEach
FormAuthenticator	An Authenticator and Valve implementation of FORM BASED Authentication, as described in the Servlet API Specification.
ForTokens
FragmentationInterceptor	The fragmentation interceptor splits up large messages into smaller messages and assembles them on the other end.
FragmentationInterceptor.FragCollection
FragmentationInterceptor.FragKey
FragmentationInterceptorMBean
FragmentJarScannerCallback	Callback handling a web-fragment.xml descriptor.
FrameworkListener	This listener must be declared in server.xml as a Server listener, possibly optional.
FunctionMapperFactory
FunctionMapperImpl
FunctionMapperImpl	Deprecated.
FunctionMapperImpl.Function
GenericGroup<UD extends UserDatabase>	Concrete implementation of `Group` for a `UserDatabase`.
GenericKeyedObjectPool<K,T>	A configurable `KeyedObjectPool` implementation.
GenericKeyedObjectPoolConfig<T>	A simple structure encapsulating the configuration for a `GenericKeyedObjectPool`.
GenericKeyedObjectPoolMXBean<K>	Defines the methods that will be made available via JMX.
GenericNamingResourcesFactory	Simple way of configuring generic resources by using reflection.
GenericObjectPool<T>	A configurable `ObjectPool` implementation.
GenericObjectPoolConfig<T>	A simple structure encapsulating the configuration for a `GenericObjectPool`.
GenericObjectPoolMXBean	Defines the methods that will be made available via JMX.
GenericPrincipal	Generic implementation of java.security.Principal that is available for use by `Realm` implementations.
GenericRole<UD extends UserDatabase>	Concrete implementation of `Role` for a `UserDatabase`.
GenericUser<UD extends UserDatabase>	Concrete implementation of `User` for a `UserDatabase`.
Global	Deprecated. The scope of the APR/Native Library will be reduced in Tomcat 9.1.x / Tomcat Native 2.x and has been reduced in Tomcat 10.1.x / Tomcat Native 2.x onwards to only include those components required to provide OpenSSL integration with the NIO and NIO2 connectors.
GlobalNamingResourcesSF	store server.xml GlobalNamingResource.
GlobalResourcesLifecycleListener	Implementation of `LifecycleListener` that instantiates the set of MBeans associated with global JNDI resources that are subject to management.
Globals	Global constants that are applicable to multiple packages within Catalina.
Group	Abstract representation of a group of `User`s in a `UserDatabase`.
GroupChannel	The default implementation of a Channel. The GroupChannel manages the replication channel.
GroupChannel.InterceptorIterator	An iterator to loop through the interceptors in a channel.
GroupChannelMBean
GroupMBean	A ModelMBean implementation for the `org.apache.catalina.Group` component.
GzipInterceptor
GzipInterceptorMBean
GzipOutputFilter	Gzip output filter.
Handler
HandlerRef	Represents a reference handler for a web service.
HeadersTooLargeException	Exception used to mark the specific error condition of the HTTP headers exceeding the maximum permitted size.
HeaderUtil
HealthCheckValve	Simple Valve that responds to cloud orchestrators health checks.
Heartbeat	Can be implemented by the ChannelListener and Membership listeners to receive heartbeat notifications from the Channel
HeartbeatListener
HexUtils	Tables useful when converting byte arrays to and from strings of hexadecimal digits.
HomesUserDatabase	Concrete implementation of the `UserDatabase` interface considers all directories in a directory whose pathname is specified to our constructor to be "home" directories for those users.
Host	A Host is a Container that represents a virtual host in the Catalina servlet engine.
Host
HostConfig	Startup event listener for a Host that configures the properties of that Host, and the associated defined contexts.
HostConfig.DeployedApplication	This class represents the state of a deployed application, as well as the monitored resources.
HostManagerServlet	Servlet that enables remote management of the virtual hosts installed on the server.
HostRuleSet	RuleSet for processing the contents of a Host definition element.
HpackDecoder	A decoder for HPACK.
HPackHuffman
HPackHuffman.HuffmanCode
HTMLHostManagerServlet	Servlet that enables remote management of the virtual hosts deployed on the server.
HTMLManagerServlet	Servlet that enables remote management of the web applications deployed within the same virtual host as this web application is.
Http11AprProtocol	Deprecated. The APR/Native Connector will be removed in Tomcat 9.1.x onwards and has been removed from Tomcat 10.1.x onwards.
Http11InputBuffer	InputBuffer for HTTP that provides request header parsing as well as transfer encoding.
Http11Nio2Protocol	HTTP/1.1 protocol implementation using NIO2.
Http11NioProtocol	HTTP/1.1 protocol implementation using NIO.
Http11OutputBuffer	Provides buffering for the HTTP headers (allowing responses to be reset before they have been committed) and the link to the Socket for writing the headers (once committed) and the response body.
Http11Processor
Http2AsyncUpgradeHandler
Http2OutputBuffer
Http2Protocol
HttpHeaderParser
HttpHeaderParser.HeaderDataSource
HttpHeaderParser.HeaderParsePosition
HttpHeaderParser.HeaderParseStatus
HttpHeaderSecurityFilter	Provides a single configuration point for security measures that required the addition of one or more HTTP headers to the response.
HttpJspBase	This is the super class of all JSP-generated servlets.
HttpOutputBuffer
HttpParser	HTTP header value parser implementation.
IdentityInputFilter	Identity input filter.
IdentityOutputFilter	Identity output filter.
If
ImplicitTldRuleSet	RulesSet for digesting implicit.tld files.
Import
Import
Injectable
InjectionTarget
InlineExecutorService
InputBuffer	The buffer used by Tomcat request.
InputBuffer	This class is only for internal use in the protocol implementation.
InputFilter	Input filter interface.
InputSourceUtil
InsecureStreamProvider
InstanceKeyDataSource	The base class for `SharedPoolDataSource` and `PerUserPoolDataSource`.
InstanceManager
InstanceManagerBindings
InstanceManagerFactory
InstrumentableClassLoader	Specifies a class loader capable of being decorated with `ClassFileTransformer`s.
InterceptorPayload
InterceptorSF	Generate Interceptor Element
InternalHttpUpgradeHandler	This Tomcat specific interface is implemented by handlers that require direct access to Tomcat's I/O layer rather than going through the Servlet API.
InternalRewriteMap
InternalRewriteMap.Escape
InternalRewriteMap.LowerCase
InternalRewriteMap.Unescape
InternalRewriteMap.UpperCase
Introspection	Provides introspection utilities that either require knowledge of Tomcat internals or are solely used by Tomcat internals.
IntrospectionUtils	Utils for introspection and reflection
IntrospectionUtils.PropertySource
IntrospectionUtils.SecurePropertySource
InvalidContentTypeException	Thrown to indicate that the request is not a multipart request.
InvalidFileNameException	This exception is thrown in case of an invalid file name.
IOFileUploadException	Thrown to indicate an IOException.
IOTools	Contains commonly needed I/O-related methods
IOUtils	General IO stream manipulation utilities.
IPv6Utils	IPv6 utilities.
IStoreConfig
IStoreFactory
JAASCallbackHandler	Implementation of the JAAS `CallbackHandler` interface, used to negotiate delivery of the username and credentials that were specified to our constructor.
JAASMemoryLoginModule	Implementation of the JAAS LoginModule interface, primarily for use in testing `JAASRealm`.
JAASRealm	Implementation of Realm that authenticates users via the Java Authentication and Authorization Service (JAAS).
Jar	Provides an abstraction for use by the various classes that need to scan JARs.
JarContents	This class represents the contents of a jar by determining whether a given resource might be in the cache, based on a bloom filter.
JarFactory	Provide a mechanism to obtain objects that implement `Jar`.
JarFileUrlJar	Implementation of `Jar` that is optimised for file based JAR URLs that refer directly to a JAR file (e.g URLs of the form jar:file: ... .jar!
JarFileUrlNestedJar	Implementation of `Jar` that is optimised for file based JAR URLs that refer to a JAR file nested inside a WAR (e.g URLs of the form jar:file: ... .war!
JarResource	Represents a single resource (file or directory) that is located within a JAR.
JarResourceRoot
JarResourceSet	Represents a `WebResourceSet` based on a JAR file.
JarScanFilter
JarScanner	Scans a web application and classloader hierarchy for JAR files.
JarScannerCallback	This interface is implemented by clients of the `JarScanner` to enable them to receive notification of a discovered JAR.
JarScannerFactory	Provide a mechanism for Jasper to obtain a reference to the JarScanner implementation.
JarScannerSF	Store server.xml Element JarScanner
JarScanType
JarWarResource	Represents a single resource (file or directory) that is located within a JAR that in turn is located in a WAR file.
JarWarResourceSet	Represents a `WebResourceSet` based on a JAR file that is nested inside a packed WAR file.
JasperELResolver	Jasper-specific CompositeELResolver that optimizes certain functions to avoid unnecessary resolver calls.
JasperELResolver.GraalBeanELResolver	Extend ELResolver for Graal to avoid bean info use if possible, as BeanELResolver needs manual reflection configuration.
JasperException	Base class for all exceptions generated by the JSP engine.
JasperInitializer	Initializer for the Jasper JSP Engine.
JasperLoader	Class loader for loading servlet class files (corresponding to JSP files) and tag handler class files (corresponding to tag files).
JavacErrorDetail	Class providing details about a javac compilation error.
JavaClass	Represents a Java class, i.e., the data structures, constant pool, fields, methods and commands contained in a Java .class file.
javaURLContextFactory	Context factory for the "java:" namespace.
Jdbc41Bridge	Defines bridge methods to JDBC 4.1 (Java 7 or above) methods to allow call sites to operate safely (without `AbstractMethodError`) when using a JDBC driver written for JDBC 4.0 (Java 6 or above).
JDBCAccessLogValve	Deprecated. Non scalable design, and not documented.
JdbcInterceptor	Abstract class that is to be extended for implementations of interceptors.
JdbcLeakPrevention	This class is loaded by `WebappClassLoaderBase` to enable it to deregister JDBC drivers forgotten by the web application.
JDBCRealm	Deprecated. Will be removed in Tomcat 10 onwards.
JDBCStore	Deprecated. Removed in Tomcat 10 and replaced by DataSourceStore with removal of legacy JDBC code
JdkLoggerFormatter	A more compact formatter.
JDTCompiler	JDT class compiler.
JKStatusUpdateTask	Ant task that implements the `/status` command, supported by the mod_jk status (1.2.9) application.
JMXAccessorCondition	Definition:
JMXAccessorConditionBase
JMXAccessorCreateTask	Create new MBean at JMX JSR 160 MBeans Server.
JMXAccessorEqualsCondition	Definition
JMXAccessorGetTask	Access JMX JSR 160 MBeans Server.
JMXAccessorInvokeTask	Access JMX JSR 160 MBeans Server.
JMXAccessorQueryTask	Query for Mbeans.
JMXAccessorSetTask	Access JMX JSR 160 MBeans Server.
JMXAccessorTask	Access JMX JSR 160 MBeans Server.
JMXAccessorUnregisterTask	unregister an MBean at JMX JSR 160 MBeans Server.
JmxChannel
JmxEnabled	This interface is implemented by components that will be registered with an MBean server when they are created and unregistered when they are destroyed.
JMXGetTask	Ant task that implements the JMX Get command (`/jmxproxy/?`
JMXProxyServlet	This servlet will dump JMX attributes in a simple format and implement proxy services for modeler.
JMXQueryTask	Ant task that implements the JMX Query command (`/jmxproxy/?`
JmxRegistry
JMXSetTask	Ant task that implements the JMX Set command (`/jmxproxy/?`
JmxUtil
JNDIRealm	Implementation of Realm that works with a directory server accessed via the Java Naming and Directory Interface (JNDI) APIs.
JNDIRealm.JNDIConnection	Class holding the connection to the directory plus the associated non thread safe message formats.
JNDIRealm.User	A protected class representing a User
JniLifecycleListener	An implementation of LifeCycleListener that loads a native library into the JVM.
Jre12Compat
Jre19Compat
Jre21Compat
Jre22Compat
JreCompat
JreCompat	This is the base implementation class for JRE compatibility and provides an implementation based on Java 8.
JreMemoryLeakPreventionListener	Provide a workaround for known places where the Java Runtime environment can cause a memory leak or lock files.
JrePlatform
JreVendor
JsonAccessLogValve	Access log valve derivative that rewrites entries as JSON.
JsonAccessLogValve.CharElement	write any char
JsonErrorReportValve	Implementation of a Valve that outputs error jsons.
JsonFormatter	Provides the same information as the one line format but using JSON formatting.
JsonFormatter.JSONFilter	Provides escaping of values so they can be included in a JSON document.
JspApplicationContextImpl	Implementation of JspApplicationContext
JspC	Shell for the jspc compiler.
JspCompilationContext	A place holder for various things that are used through out the JSP engine.
JspConfig	Handles the jsp-config element in WEB_INF/web.xml.
JspConfig.JspProperty
JspConfig.JspPropertyGroup
JspConfigDescriptorImpl
JspContextWrapper	Implementation of a JSP Context Wrapper.
JspCServletContext	Simple `ServletContext` implementation without HTTP-specific methods.
JspELException
JspFactoryImpl	Implementation of JspFactory.
JspFragmentHelper	Helper class from which all Jsp Fragment helper classes extend.
JspHelper	Helper JavaBean for JSPs, because JSTL 1.1/EL 2.0 is too dumb to to what I need (call methods with parameters), or I am too dumb to use it correctly. :)
JspMethodExpression
JspMethodNotFoundException
JspPropertyGroup	Representation of a jsp-property-group element in web.xml.
JspPropertyGroupDescriptorImpl
JspPropertyNotFoundException
JspPropertyNotWritableException
JspRuntimeContext	Class for tracking JSP compile time file dependencies when the >%@include file="
JspRuntimeLibrary	Bunch of util methods that are used by code generated for useBean, getProperty and setProperty.
JspServlet	The JSP engine (a.k.a Jasper).
JspServletWrapper	The JSP engine (a.k.a Jasper).
JspSourceDependent	Interface for tracking the source files dependencies, for the purpose of compiling out of date pages.
JspSourceImports	The EL engine needs access to the imports used in the JSP page to configure the ELContext.
JspUtil	This class has all the utility method(s).
JspUtil.ValidAttribute
JspValueExpression	Wrapper for providing context to ValueExpressions
JspWriterImpl	Write text to a character-output stream, buffering characters so as to provide for the efficient writing of single characters, arrays, and strings.
JSSEImplementation
JSSEKeyManager	X509KeyManager which allows selection of a specific key pair and certificate chain (identified by their keystore alias name) to be used by the server to authenticate itself to SSL clients.
JSSESupport	JSSESupport.
JSSEUtil	SSLUtil implementation for JSSE.
JvmRouteBinderValve	Valve to handle Tomcat jvmRoute takeover using mod_jk module after node failure.
KeyedObjectPool<K,V>	A "keyed" pooling interface.
KeyedPooledObjectFactory<K,V>	An interface defining life-cycle methods for instances to be served by a `KeyedObjectPool`.
KeyExchange
KeyStoreUtil
KubernetesMembershipProvider	A `MembershipProvider` that uses Kubernetes API to retrieve the members of a cluster.
LambdaExpressionNestedState	Stores the state required for correct evaluation of lambda expressions.
LazyReplicatedMap<K,V>	A smart implementation of a stateful replicated map. uses primary/secondary backup strategy.
LegacyCookieProcessor	The legacy (up to early Tomcat 8 releases) cookie parser based on RFC6265, RFC2109 and RFC2616.
Library
LibraryNotFoundError
Lifecycle	Common interface for component life cycle methods.
Lifecycle.SingleUse	Marker interface used to indicate that the instance should only be used once.
LifecycleBase	Base implementation of the `Lifecycle` interface that implements the state transition rules for `Lifecycle.start()` and `Lifecycle.stop()`
LifecycleEvent	General event for notifying listeners of significant changes on a component that implements the Lifecycle interface.
LifecycleException	General purpose exception that is thrown to indicate a lifecycle related problem.
LifecycleListener	Interface defining a listener for significant events (including "component start" and "component stop" generated by a component that implements the Lifecycle interface.
LifecycleListenerRule	Rule that creates a new `LifecycleListener` and associates it with the top object on the stack which must implement `Container`.
LifecycleMBeanBase
LifecycleState	The list of valid states for components that implement `Lifecycle`.
LimitedInputStream	An input stream, which limits its data size.
LimitLatch	Shared latch that allows the latch to be acquired a limited number of times after which all subsequent requests to acquire the latch will be placed in a FIFO queue until one of the shares is returned.
ListenCallback	Internal interface, similar to the MessageListener but used at the IO base The listen callback interface is used by the replication system when data has been received.
ListenerCreateRule	Rule implementation that creates a server listener.
ListenerCreateRule.OptionalListener
ListException	An exception wrapping a list of exceptions.
ListTask	Ant task that implements the `/list` command, supported by the Tomcat manager application.
LoadBalancerDrainingValve	A Valve to detect situations where a load-balanced node receiving a request has been deactivated by the load balancer (JK_LB_ACTIVATION=DIS) and the incoming request has no valid session.
Loader	A Loader represents a Java ClassLoader implementation that can be used by a Container to load class files (within a repository associated with the Loader) that are designed to be reloaded upon request, as well as a mechanism to detect whether changes have occurred in the underlying repository.
LoaderSF	Store Loader Element.
Local	Deprecated. The scope of the APR/Native Library will be reduced in Tomcat 9.1.x / Tomcat Native 2.x and has been reduced in Tomcat 10.1.x / Tomcat Native 2.x onwards to only include those components required to provide OpenSSL integration with the NIO and NIO2 connectors.
Localizer	Class responsible for converting error codes to corresponding localized error messages.
LocalResolver	A resolver for locally cached XML resources.
LocalXAConnectionFactory	An implementation of XAConnectionFactory which manages non-XA connections in XA transactions.
LocalXAConnectionFactory.LocalXAResource	LocalXAResource is a fake XAResource for non-XA connections.
Lock	Deprecated. The scope of the APR/Native Library will be reduced in Tomcat 9.1.x / Tomcat Native 2.x and has been reduced in Tomcat 10.1.x / Tomcat Native 2.x onwards to only include those components required to provide OpenSSL integration with the NIO and NIO2 connectors.
LockOutRealm	This class extends the CombinedRealm (hence it can wrap other Realms) to provide a user lock out mechanism if there are too many failed authentication attempts in a given period of time.
LockOutRealm.LockRecord
Log	A simple logging interface abstracting logging APIs.
LogConfigurationException	An exception that is thrown only if a suitable `LogFactory` or `Log` instance cannot be created by the corresponding factory methods.
LogFactory	This is a modified LogFactory that uses a simple `ServiceLoader` based discovery mechanism with a default of using JDK based logging.
LoginConfig	Representation of a login configuration element for a web application, as represented in a `<login-config>` element in the deployment descriptor.
Logs	Simple class that holds references to global loggers
LookupFactory	Object factory for lookups.
LookupRef	Represents a reference to lookup.
MailSessionFactory	Factory class that creates a JNDI named JavaMail Session factory, which can be used for managing inbound and outbound electronic mail messages via JavaMail APIs.
ManagedBean	Internal configuration information for a managed bean (MBean) descriptor.
ManagedChannel	A managed channel interface gives you access to the components of the channels such as senders, receivers, interceptors etc for configurations purposes
ManagedConcurrentWeakHashMap<K,V>	Concurrent hash map that holds its keys via weak references.
ManagedConnection<C extends java.sql.Connection>	ManagedConnection is responsible for managing a database connection in a transactional environment (typically called "Container Managed").
ManagedDataSource<C extends java.sql.Connection>	The ManagedDataSource is a PoolingDataSource that creates ManagedConnections.
Manager	A Manager manages the pool of Sessions that are associated with a particular Context.
ManagerBase	Minimal implementation of the Manager interface that supports no session persistence or distributable capabilities.
ManagerBase.SessionTiming
ManagerServlet	Servlet that enables remote management of the web applications installed within the same virtual host as this web application is.
ManagerSF	Store server.xml Manager element
ManifestResource	Representation of a Manifest file and its available extensions and required extensions
Mapper	Mapper, which implements the servlet API mapping rules (which are derived from the HTTP rules).
Mapper.ContextList
Mapper.ContextVersion
Mapper.MapElement<T>
Mapper.MappedContext
Mapper.MappedHost
Mapper.MappedWrapper
MapperListener	Mapper listener.
MappingData	Mapping data.
Matcher	This is a utility class to match file globs.
MBeanDumper	General helper to dump MBean contents to the log.
MBeanFactory
MbeansDescriptorsDigesterSource
MbeansDescriptorsIntrospectionSource
MBeanUtils	Public utility methods in support of the server side MBeans implementation.
McastService	A membership implementation using simple multicast.
McastServiceImpl	A membership implementation using simple multicast.
McastServiceImpl.RecoveryThread
McastServiceMBean
MD5Encoder	Deprecated. Unused.
MediaType
MediaTypeCache	Caches the results of parsing content-type headers.
Member	The Member interface, defines a member in the group.
MemberImpl	A membership implementation using simple multicast.
Membership	A membership implementation using simple multicast.
Membership.MbrEntry	Inner class that represents a member entry
MembershipListener	The MembershipListener interface is used as a callback to the membership service.
MembershipProvider
MembershipProviderBase
MembershipService	The `MembershipService` interface is the membership component at the bottom layer, the IO layer (for layers see the javadoc for the `Channel` interface).
MembershipServiceBase
MemoryGroup	Deprecated. Use `GenericGroup` instead.
MemoryRealm	Simple implementation of Realm that reads an XML file to configure the valid users, passwords, and roles.
MemoryRole	Deprecated. Use `GenericRole` instead.
MemoryRuleSet	RuleSet for recognizing the users defined in the XML file processed by `MemoryRealm`.
MemoryUser	Deprecated. Use `GenericUser` instead.
MemoryUserDatabase	Concrete implementation of `UserDatabase` that loads all defined users, groups, and roles into an in-memory data structure, and uses a specified XML file for its persistent storage.
MemoryUserDatabaseFactory	JNDI object creation factory for `MemoryUserDatabase` instances.
MemoryUserDatabaseMBean	A ModelMBean implementation for the `org.apache.catalina.users.MemoryUserDatabase` component.
MessageBytes	This class is used to represent a subarray of bytes in an HTTP message.
MessageDestination	Representation of a message destination for a web application, as represented in a `<message-destination>` element in the deployment descriptor.
MessageDestinationRef	Representation of a message destination reference for a web application, as represented in a `<message-destination-ref>` element in the deployment descriptor.
MessageDigest
MessageDigestCredentialHandler	This credential handler supports the following forms of stored passwords: encodedCredential - a hex encoded digest of the password digested using the configured digest {MD5}encodedCredential - a Base64 encoded MD5 digest of the password {SHA}encodedCredential - a Base64 encoded SHA1 digest of the password {SSHA}encodedCredential - 20 byte Base64 encoded SHA1 digest followed by variable length salt.
MessageDispatchInterceptor	The message dispatcher is a way to enable asynchronous communication through a channel.
MessageDispatchInterceptorMBean
MessageFactory
MessageHandlerResult
MessageHandlerResultType
MessageInfoImpl
MessageListener	The listener to be registered with the ChannelReceiver, internal Tribes component.
MethodExpressionImpl	An `Expression` that refers to a method on an object.
MethodExpressionLiteral
MimeHeaders	Memory-efficient repository for Mime Headers.
MimeUtility	Utility class to decode MIME texts.
Mmap	Deprecated. The scope of the APR/Native Library will be reduced in Tomcat 9.1.x / Tomcat Native 2.x and has been reduced in Tomcat 10.1.x / Tomcat Native 2.x onwards to only include those components required to provide OpenSSL integration with the NIO and NIO2 connectors.
ModelerSource	Source for descriptor data.
Multicast	Deprecated. The scope of the APR/Native Library will be reduced in Tomcat 9.1.x / Tomcat Native 2.x and has been reduced in Tomcat 10.1.x / Tomcat Native 2.x onwards to only include those components required to provide OpenSSL integration with the NIO and NIO2 connectors.
MultiCastSender	Sender to proxies using multicast socket.
MultiLockFairBlockingQueue<E>	EXPERIMENTAL AND NOT YET COMPLETE!
MultipartDef	Representation of a the multipart configuration for a servlet.
MultipartStream	Low level API for processing file uploads.
MultipartStream.IllegalBoundaryException	Thrown upon attempt of setting an invalid boundary token.
MultipartStream.MalformedStreamException	Thrown to indicate that the input stream fails to follow the required syntax.
MultipartStream.ProgressNotifier	Internal class, which is used to invoke the `ProgressListener`.
MultipointBioSender	Deprecated. This will be removed in Tomcat 10
MultiPointSender
MultiThrowable	Wraps a list of throwables as a single throwable.
NameParserImpl	Parses names.
NamingContext	Catalina JNDI Context implementation.
NamingContextBindingsEnumeration	Naming enumeration implementation.
NamingContextEnumeration	Naming enumeration implementation.
NamingContextListener	Helper class used to initialize and populate the JNDI context associated with each context and server.
NamingEntry	Represents a binding in a NamingContext.
NamingResources	Defines an interface for the object that is added to the representation of a JNDI resource in web.xml to enable it to also be the implementation of that JNDI resource.
NamingResourcesImpl	Holds and manages the naming resources defined in the J2EE Enterprise Naming Context and their associated JNDI context.
NamingResourcesMBean	A ModelMBean implementation for the `org.apache.catalina.deploy.NamingResourcesImpl` component.
NamingResourcesSF	Store server.xml elements Resources at context and GlobalNamingResources
NamingRuleSet	RuleSet for processing the JNDI Enterprise Naming Context resource declaration elements.
NestedCredentialHandler
NetMask	A class representing a CIDR netmask.
NetMaskSet	This class maintains a Set of NetMask objects and allows to check if a given IP address is matched by any of the NetMasks, making it easy to create Allow and Deny lists of CIDR networks and hosts.
NewlineReductionServletWriter	This class filters duplicate newlines instructions from the compiler output, and therefore from the runtime JSP.
Nio2Channel	Base class for a SocketChannel wrapper used by the endpoint.
Nio2Endpoint	NIO2 endpoint.
Nio2Endpoint.Nio2SocketWrapper
Nio2Endpoint.SendfileData	SendfileData class.
NioChannel	Base class for a SocketChannel wrapper used by the endpoint.
NioEndpoint	NIO endpoint.
NioEndpoint.NioSocketWrapper
NioEndpoint.PollerEvent	PollerEvent, cacheable object for poller events to avoid GC
NioEndpoint.SendfileData	SendfileData class.
NioReceiver
NioReceiverMBean
NioReplicationTask	A worker thread class which can drain channels and echo-back the input.
NioSender	This class is NOT thread safe and should never be used with more than one thread at a time This is a state machine, handled by the process method States are: NOT_CONNECTED -> connect() -> CONNECTED CONNECTED -> setMessage() -> READY TO WRITE READY_TO_WRITE -> write() -> READY TO WRITE \| READY TO READ READY_TO_READ -> read() -> READY_TO_READ \| TRANSFER_COMPLETE TRANSFER_COMPLETE -> CONNECTED
NoDescriptorRegistry	An implementation of the MBean registry that effectively disables MBean registration.
NonBlockingCoordinator	Title: Auto merging leader election algorithm
NonBlockingCoordinator.CoordinationEvent
NonBlockingCoordinator.CoordinationMessage
NonClosingJarInputStream	When using a `JarInputStream` with an XML parser, the stream will be closed by the parser.
NonLoginAuthenticator	An Authenticator and Valve implementation that checks only security constraints not involving user authentication.
NonPipeliningProcessor	Marker interface used to indicate that the `Processor` does not implement pipe-lining of requests (e.g.
NoOpCallStack	CallStack strategy using no-op implementations of all functionality.
NotificationInfo	Internal configuration information for a `Notification` descriptor.
NullRealm	Minimal Realm implementation that always returns null when an attempt is made to validate a user name and password.
ObjectCreateRule	Rule implementation that creates a new object and pushes it onto the object stack.
ObjectCreationFactory	Interface for use with `FactoryCreateRule`.
ObjectPool<T>	A pooling simple interface.
ObjectReader	The object reader object is an object used in conjunction with java.nio TCP messages.
ObjectReflectionPropertyInspector
OneLineFormatter	Provides same information as default log format but on a single line to make it easier to grep the logs.
OpenEjbFactory	Object factory for EJBs.
OpenSSLCipherConfigurationParser	Class in charge with parsing openSSL expressions to define a list of ciphers.
OpenSSLConf
OpenSSLConfCmd
OpenSSLConfSF	Store OpenSSLConf
OpenSSLContext
OpenSSLEngine	Implements a `SSLEngine` using OpenSSL BIO abstractions.
OpenSSLImplementation
OpenSSLLifecycleListener	Implementation of `LifecycleListener` that will do the global initialization of OpenSSL according to specified configuration parameters.
OpenSSLSessionContext	OpenSSL specific `SSLSessionContext` implementation.
OpenSSLSessionStats	Stats exposed by an OpenSSL session context.
OpenSSLStatus	Holds OpenSSL status without the need to load other classes.
OpenSSLStatus.Name	OpenSSL library variant that has been identified
OpenSSLUtil
OperationInfo	Internal configuration information for an `Operation` descriptor.
Optional
Options	A class to hold all init parameters specific to the JSP engine.
OrderInterceptor	The order interceptor guarantees that messages are received in the same order they were sent.
OrderInterceptor.Counter
OrderInterceptor.MessageOrder
OS	Deprecated. The scope of the APR/Native Library will be reduced in Tomcat 9.1.x / Tomcat Native 2.x and has been reduced in Tomcat 10.1.x / Tomcat Native 2.x onwards to only include those components required to provide OpenSSL integration with the NIO and NIO2 connectors.
Otherwise
Out
OutputBuffer	The buffer used by Tomcat response.
OutputBuffer	Output buffer.
OutputFilter	Output filter.
PageContextImpl	Implementation of the PageContext class from the JSP spec.
ParallelNioSender
ParallelWebappClassLoader
Param
ParameterInfo	Internal configuration information for a `Parameter` descriptor.
ParameterMap<K,V>	Implementation of java.util.Map that includes a `locked` property.
ParameterParser	A simple parser intended to parse sequences of name/value pairs.
Parameters
Parameters.FailReason
PasswdUserDatabase	Concrete implementation of the `UserDatabase` interface that processes the `/etc/passwd` file on a Unix system.
PasswordCallback	Deprecated. Unused.
PEMFile	RFC 1421 PEM file containing X509 certificates or private keys.
PeriodicEventListener
PerMessageDeflate
PermissionCheck	This interface is implemented by components to enable privileged code to check whether the component has a given permission.
PersistentManager	Implementation of the Manager interface that makes use of a Store to swap active Sessions to disk.
PersistentManagerBase	Extends the `ManagerBase` class to implement most of the functionality required by a Manager which supports any kind of persistence, even if only for restarts.
PersistentManagerSF	store server.xml PersistentManager element with nested "Store"
PersistentProviderRegistrations	Utility class for the loading and saving of JASPIC persistent provider registrations.
PersistentProviderRegistrations.Property
PersistentProviderRegistrations.Provider
PersistentProviderRegistrations.Providers
PersistentValve	Valve that implements per-request session persistence.
PerUserPoolDataSource	A pooling `DataSource` appropriate for deployment within J2EE environment.
PerUserPoolDataSourceFactory	A JNDI ObjectFactory which creates `SharedPoolDataSource`s
Pipeline	Interface describing a collection of Valves that should be executed in sequence when the `invoke()` method is invoked.
PojoClassHolder
PojoEndpointBase	Base implementation (client and server have different concrete implementations) of the wrapper that converts a POJO instance into a WebSocket endpoint instance.
PojoEndpointClient	Wrapper class for instances of POJOs annotated with `ClientEndpoint` so they appear as standard `Endpoint` instances.
PojoEndpointServer	Wrapper class for instances of POJOs annotated with `ServerEndpoint` so they appear as standard `Endpoint` instances.
PojoHolder
PojoMessageHandlerBase<T>	Common implementation code for the POJO message handlers.
PojoMessageHandlerPartialBase<T>	Common implementation code for the POJO partial message handlers.
PojoMessageHandlerPartialBinary	ByteBuffer specific concrete implementation for handling partial messages.
PojoMessageHandlerPartialText	Text specific concrete implementation for handling partial messages.
PojoMessageHandlerWholeBase<T>	Common implementation code for the POJO whole message handlers.
PojoMessageHandlerWholeBinary	ByteBuffer specific concrete implementation for handling whole messages.
PojoMessageHandlerWholePong	PongMessage specific concrete implementation for handling whole messages.
PojoMessageHandlerWholeText	Text specific concrete implementation for handling whole messages.
PojoMethodMapping	For a POJO class annotated with `ServerEndpoint`, an instance of this class creates and caches the method handler, method information and parameter information for the onXXX calls.
PojoPathParam	Stores the parameter type and name for a parameter that needs to be passed to an onXxx method of `Endpoint`.
Poll	Deprecated. The scope of the APR/Native Library will be reduced in Tomcat 9.1.x / Tomcat Native 2.x and has been reduced in Tomcat 10.1.x / Tomcat Native 2.x onwards to only include those components required to provide OpenSSL integration with the NIO and NIO2 connectors.
Pool	Provides access to APR memory pools which are used to manage memory allocations for natively created instances.
PoolableCallableStatement	A `DelegatingCallableStatement` that cooperates with `PoolingConnection` to implement a pool of `CallableStatement`s.
PoolableConnection	A delegating connection that, rather than closing the underlying connection, returns itself to an `ObjectPool` when closed.
PoolableConnectionFactory	A `PooledObjectFactory` that creates `PoolableConnection`s.
PoolableConnectionMXBean	Defines the attributes and methods that will be exposed via JMX for `PoolableConnection` instances.
PoolableManagedConnection	PoolableConnection that unregisters from TransactionRegistry on Connection real destroy.
PoolableManagedConnectionFactory	A `PoolableConnectionFactory` that creates `PoolableManagedConnection`s.
PoolablePreparedStatement<K>	A `DelegatingPreparedStatement` that cooperates with `PoolingConnection` to implement a pool of `PreparedStatement`s.
PoolCallback	Deprecated. The scope of the APR/Native Library will be reduced in Tomcat 9.1.x / Tomcat Native 2.x and has been reduced in Tomcat 10.1.x / Tomcat Native 2.x onwards to only include those components required to provide OpenSSL integration with the NIO and NIO2 connectors.
PoolConfiguration	A list of properties that are configurable for a connection pool.
PooledConnection	Represents a pooled connection and holds a reference to the `Connection` object
PooledConnectionMBean
PooledMultiSender	Deprecated. This will be removed in Tomcat 10
PooledObject<T>	Defines the wrapper that is used to track the additional information, such as state, for the pooled objects.
PooledObjectFactory<T>	An interface defining life-cycle methods for instances to be served by an `ObjectPool`.
PooledObjectState	Provides all possible states of a `PooledObject`.
PooledParallelSender
PooledParallelSenderMBean
PooledSender
PooledSoftReference<T>	Extension of `DefaultPooledObject` to wrap pooled soft references.
PoolExhaustedException
PoolingConnection	A `DelegatingConnection` that pools `PreparedStatement`s.
PoolingConnection.StatementType	Statement types.
PoolingDataSource<C extends java.sql.Connection>	A simple `DataSource` implementation that obtains `Connection`s from the specified `ObjectPool`.
PoolingDriver	A `Driver` implementation that obtains `Connection`s from a registered `ObjectPool`.
PoolProperties
PoolProperties.InterceptorDefinition
PoolProperties.InterceptorProperty
PoolUtilities
PoolUtils	This class consists exclusively of static methods that operate on or return ObjectPool or KeyedObjectPool related interfaces.
Priority	HTTP priority header parser as per RFC 9218.
PrivilegedGetTccl
PrivilegedSetAccessControlContext
PrivilegedSetTccl
Proc	Deprecated. The scope of the APR/Native Library will be reduced in Tomcat 9.1.x / Tomcat Native 2.x and has been reduced in Tomcat 10.1.x / Tomcat Native 2.x onwards to only include those components required to provide OpenSSL integration with the NIO and NIO2 connectors.
Procattr	Deprecated. The scope of the APR/Native Library will be reduced in Tomcat 9.1.x / Tomcat Native 2.x and has been reduced in Tomcat 10.1.x / Tomcat Native 2.x onwards to only include those components required to provide OpenSSL integration with the NIO and NIO2 connectors.
ProcErrorCallback	Deprecated. The scope of the APR/Native Library will be reduced in Tomcat 9.1.x / Tomcat Native 2.x and has been reduced in Tomcat 10.1.x / Tomcat Native 2.x onwards to only include those components required to provide OpenSSL integration with the NIO and NIO2 connectors.
Processor	Common interface for processors of all protocols.
ProgressListener	The `ProgressListener` may be used to display a progress bar or do stuff like that.
PropertiesRoleMappingListener	Implementation of `LifecycleListener` that will populate the context's role mapping from a properties file.
ProtectedFunctionMapper	Maps EL functions to their Java method counterparts.
Protocol
ProtocolException	Used when we need to indicate failure but the (Servlet) API doesn't declare any appropriate exceptions.
ProtocolHandler	Abstract the protocol implementation, including threading, etc.
Proxy	This class represents a front-end httpd server.
ProxyConnection	A ProxyConnection object is the bottom most interceptor that wraps an object of type `PooledConnection`.
ProxyErrorReportValve	Implementation of a Valve that proxies or redirects error reporting to other urls.
PStmtKey	A key uniquely identifying `PreparedStatement`s.
PStmtKeyCPDS	Deprecated. Use `PStmtKey`.
QueryTimeoutInterceptor
QuotedStringTokenizer
RandomizedTextRewriteMap	Implement a map for the txt: and rnd: mod_rewrite capabilities.
Ranges
Ranges.Entry
RateLimiter
RateLimitFilter	Servlet filter that can help mitigate Denial of Service (DoS) and Brute Force attacks by limiting the number of a requests that are allowed from a single IP address within a time window (also referred to as a time bucket), e.g. 300 Requests per 60 seconds.
ReadBufferOverflowException
Realm	A Realm is a read-only facade for an underlying security realm used to authenticate individual users, and identify the security roles associated with those users.
RealmBase	Simple implementation of Realm that reads an XML file to configure the valid users, passwords, and roles.
RealmBase.AllRolesMode
RealmRuleSet	RuleSet for processing the contents of a Realm definition element.
RealmSF	Store server.xml Element Realm
ReceiverBase
Redirect
ReferenceCountedJar	This class provides a wrapper around `Jar` that uses reference counting to close and re-create the wrapped `Jar` instance as required.
ReflectionUtil	Utilities for Managing Serialization and Reflection
Registry	Deprecated. The scope of the APR/Native Library will be reduced in Tomcat 9.1.x / Tomcat Native 2.x and has been reduced in Tomcat 10.1.x / Tomcat Native 2.x onwards to only include those components required to provide OpenSSL integration with the NIO and NIO2 connectors.
Registry	Registry for modeler MBeans.
RegistryMBean	Interface for modeler MBeans.
ReloadTask	Ant task that implements the `/reload` command, supported by the Tomcat manager application.
RemoteAddrFilter	Concrete implementation of `RequestFilter` that filters based on the string representation of the remote client's IP address.
RemoteAddrValve	Concrete implementation of `RequestFilterValve` that filters based on the string representation of the remote client's IP address optionally combined with the server connector port number.
RemoteCIDRFilter
RemoteCIDRValve
RemoteHostFilter	Concrete implementation of `RequestFilter` that filters based on the remote client's host name.
RemoteHostValve	Concrete implementation of `RequestFilterValve` that filters based on the remote client's host name optionally combined with the server connector port number.
RemoteIpFilter	Servlet filter to integrate "X-Forwarded-For" and "X-Forwarded-Proto" HTTP headers.
RemoteIpFilter.XForwardedRequest
RemoteIpValve	Tomcat port of mod_remoteip, this valve replaces the apparent client remote IP address and hostname for the request with the IP address list presented by a proxy or a load balancer via a request headers (e.g.
RemoteProcessException	Message thrown by a sender when USE_SYNC_ACK receives a FAIL_ACK_COMMAND.
Remove
RepeatableArchive	Ant task to assist with repeatable builds.
ReplicatedContext
ReplicatedContext.MultiEnumeration<T>
ReplicatedContext.ReplApplContext
ReplicatedMap<K,V>	All-to-all replication for a hash map implementation.
ReplicatedMapEntry	For smarter replication, an object can implement this interface to replicate diffs The replication logic will call the methods in the following order: `1. if ( entry.isDirty() ) try { 2.`
ReplicatedSessionListener	This is a marker interface used to indicate an implementation of `SessionListener` that should be replicated with the session across the cluster.
ReplicationStream	Custom subclass of `ObjectInputStream` that loads from the class loader for this web application.
ReplicationTransmitter	Transmit message to other cluster members Actual senders are created based on the replicationMode type
ReplicationValve	Implementation of a Valve that logs interesting contents from the specified Request (before processing) and the corresponding Response (after processing).
Request	Wrapper object for the Coyote request.
Request	This is a low-level, efficient representation of a server request.
RequestContext	Abstracts access to the request information needed for file uploads.
RequestDumperFilter	Implementation of a Filter that logs interesting contents from the specified Request (before processing) and the corresponding Response (after processing).
RequestFacade	Facade class that wraps a Coyote request object.
RequestFilter	Implementation of a Filter that performs filtering based on comparing the appropriate request property (selected based on which subclass you choose to configure into your Container's pipeline) against the regular expressions configured for this Filter.
RequestFilterValve	Implementation of a Valve that performs filtering based on comparing the appropriate request property (selected based on which subclass you choose to configure into your Container's pipeline) against the regular expressions configured for this Valve.
RequestGroupInfo	Only as a JMX artifact, to aggregate the data collected from each RequestProcessor thread.
RequestInfo	Structure holding the Request and Response objects.
RequestUtil	General purpose request parsing and encoding utility methods.
RequestUtil
ResetAbandonedTimer	Class that resets the abandoned timer on any activity on the Connection or any successful query executions.
ResetAbandonedTimerMBean
ResizableExecutor
Resolver	Resolver abstract class.
ResolverImpl
ResourceBase	Representation of an Context element
ResourceEntry	Resource entry.
ResourceEnvFactory	Object factory for Resources env.
ResourceEnvRef	Represents a reference address to a resource environment.
ResourceFactory	Object factory for Resources.
ResourceLinkFactory	Object factory for resource links.
ResourceLinkRef	Represents a reference address to a resource.
ResourceRef	Represents a reference address to a resource.
ResourceSet<T>	Extended implementation of HashSet that includes a `locked` property.
ResourcesTask	Ant task that implements the `/resources` command, supported by the Tomcat manager application.
Response	Wrapper object for the Coyote response.
Response	A response object holds a message from a responding partner.
Response	Response object.
ResponseFacade	Facade class that wraps a Coyote response object.
ResponseIncludeWrapper	An HttpServletResponseWrapper, used from `SSIServletExternalResolver`
ResponseUtil
RestCsrfPreventionFilter	Provides basic CSRF protection for REST APIs.
RewriteCond
RewriteCond.Condition
RewriteCond.LexicalCondition
RewriteCond.PatternCondition
RewriteCond.ResourceCondition
RewriteMap	Interface for user defined lookup/replacement logic that can be defined in a `rewrite.config` file by a `RewriteMap` directive.
RewriteRule
RewriteValve	Note: Extra caution should be used when adding a Rewrite Rule.
RFC2231Utility	Utility class to decode/encode character set on HTTP Header fields based on RFC 2231.
Rfc6265CookieProcessor
Role	Abstract representation of a security role, suitable for use in environments like JAAS that want to deal with `Principals`.
RoleMBean	A ModelMBean implementation for the `org.apache.catalina.Role` component.
RpcCallback	The RpcCallback interface is an interface for the Tribes channel to request a response object to a request that came in.
RpcChannel	A channel to handle RPC messaging
RpcChannel.RpcCollector	Class that holds all response.
RpcChannel.RpcCollectorKey
RpcMessage
RpcMessage.NoRpcChannelReply
Rule	Concrete implementations of this class implement actions to be taken when a corresponding nested pattern of XML elements has been matched.
Rules	Public interface defining a collection of Rule instances (and corresponding matching patterns) plus an implementation of a matching policy that selects the rules that match a particular pattern of nested elements discovered during parsing.
RulesBase	Default implementation of the `Rules` interface that supports the standard rule matching behavior.
RuleSet	Public interface defining a shorthand means of configuring a complete set of related `Rule` definitions, possibly associated with a particular namespace URI, in one operation.
RxTaskPool	A very simple thread pool class.
RxTaskPool.TaskCreator
SafeForkJoinWorkerThreadFactory	Provides a `ForkJoinPool.ForkJoinWorkerThreadFactory` that provides `ForkJoinWorkerThread`s that won't trigger memory leaks due to retained references to web application class loaders.
SameSiteCookies
SavedRequest	Object that saves the critical information from a request so that form-based authentication can reproduce it once the user has been authenticated.
SavedRequestInputFilter	Input filter responsible for replaying the request body when restoring the saved request after FORM authentication.
ScheduledThreadPoolExecutor	Class which wraps a ScheduledExecutorService, while preventing lifecycle and configuration operations.
SecretKeyCredentialHandler
SecureNio2Channel	Implementation of a secure socket channel for NIO2.
SecureNioChannel	Implementation of a secure socket channel
SecurityClassLoad	Static class used to preload java classes when using the Java SecurityManager so that the defineClassInPackage RuntimePermission does not trigger an AccessControlException.
SecurityClassLoad	Static class used to preload java classes when using the Java SecurityManager so that the defineClassInPackage RuntimePermission does not trigger an AccessControlException.
SecurityCollection	Representation of a web resource collection for a web application's security constraint, as represented in a `<web-resource-collection>` element in the deployment descriptor.
SecurityConfig	Util class to protect Catalina against package access and insertion.
SecurityConstraint	Representation of a security constraint element for a web application, as represented in a `<security-constraint>` element in the deployment descriptor.
SecurityListener	This listener must only be nested within `Server` elements.
SecurityManagerCallStack	A `CallStack` strategy using a `SecurityManager`.
SecurityRoleRef	Representation of a security role reference for a web application, as represented in a `<security-role-ref>` element in the deployment descriptor.
SecurityUtil	This utility class associates a `Subject` to the current `AccessControlContext`.
SecurityUtil	Util class for Security related operations.
SelectorContext	Catalina JNDI Context implementation.
SemaphoreValve	Implementation of a Valve that limits concurrency.
Sender	Interface to send data to proxies.
SenderSF	Generate Sender Element
SenderState
SendfileDataBase
SendfileKeepAliveState
SendfileState
SendMailFactory	Factory class that creates a JNDI named javamail MimePartDataSource object which can be used for sending email using SMTP.
SendMessageData
Server	A `Server` element represents the entire Catalina servlet container.
ServerCookie	Server-side cookie representation.
ServerCookies	This class is not thread-safe.
ServerInfo	Simple utility module to make it easy to plug in the server identifier when integrating Tomcat.
ServerinfoTask	Ant task that implements the `/serverinfo` command supported by the Tomcat manager application.
Service	A Service is a group of one or more Connectors that share a single Container to process their incoming requests.
ServiceBindingPropertySource	A `IntrospectionUtils.SecurePropertySource` that uses Kubernetes service bindings to resolve expressions.
ServiceMBean
ServiceProxy	Object proxy for Web Services.
ServiceRef	Represents a reference web service.
ServiceRefFactory	Object factory for Web Services.
ServletDef	Representation of a servlet definition for a web application, as represented in a `<servlet>` element in the deployment descriptor.
ServletRequestContext	Provides access to the request information needed for a request made to an HTTP servlet.
ServletResponseWrapperInclude	ServletResponseWrapper used by the JSP 'include' action.
ServletWriter	This is what is used to generate servlets.
Session	A Session is the Catalina-internal facade for an `HttpSession` that is used to maintain state information between requests for a particular user of a web application.
SessionConfig
SessionConfig	Representation of a session configuration element for a web application, as represented in a `<session-config>` element in the deployment descriptor.
SessionEvent	General event for notifying listeners of significant changes on a Session.
SessionIdGenerator
SessionIdGeneratorBase
SessionInitializerFilter	A `Filter` that initializes the `HttpSession` for the `HttpServletRequest` by calling its getSession() method.
SessionListener	Interface defining a listener for significant Session generated events.
SessionMessage	The SessionMessage interface is used when a session has been created, modified, expired in a Tomcat cluster node.
SessionMessageImpl	Session cluster message
SessionsTask	Ant task that implements the `/sessions` command supported by the Tomcat manager application.
SessionUtils	Utility methods on HttpSessions.
Set
SetAllPropertiesRule	Deprecated. This will be removed in Tomcat 10
SetCharacterEncodingFilter	Example filter that sets the character encoding to be used in parsing the incoming request, either unconditionally or only if the client did not specify a character encoding.
SetContextPropertiesRule	Deprecated. This will be removed in Tomcat 10
SetNextNamingRule	Rule implementation that calls a method on the (top-1) (parent) object, passing the top object (child) as an argument.
SetNextRule	Rule implementation that calls a method on the (top-1) (parent) object, passing the top object (child) as an argument.
SetPropertiesRule	Rule implementation that sets properties on the object at the top of the stack, based on attributes with corresponding names.
SetPropertiesRule.Listener
SharedPoolDataSource	A pooling `DataSource` appropriate for deployment within J2EE environment.
SharedPoolDataSourceFactory	A JNDI ObjectFactory which creates `SharedPoolDataSource`s
Shm	Deprecated. The scope of the APR/Native Library will be reduced in Tomcat 9.1.x / Tomcat Native 2.x and has been reduced in Tomcat 10.1.x / Tomcat Native 2.x onwards to only include those components required to provide OpenSSL integration with the NIO and NIO2 connectors.
SimpleAuthConfigProvider	Basic implementation primarily intended for use when using third-party `ServerAuthModule` implementations that only provide the module.
SimpleCoordinator	A dinky coordinator, just uses a sorted version of the member array.
SimpleElementValue
SimpleInstanceManager	SimpleInstanceManager Implement the org.apache.tomcat.InstanceManager interface.
SimpleServerAuthConfig	Basic implementation primarily intended for use when using third-party `ServerAuthModule` implementations that only provide the module.
SimpleServerAuthContext	Basic implementation primarily intended for use when using third-party `ServerAuthModule` implementations that only provide the module.
SimpleTcpCluster	A Cluster implementation using simple multicast.
SingleSignOn	A Valve that supports a "single sign on" user experience, where the security identity of a user who successfully authenticates to one web application is propagated to other web applications in the same security domain.
SingleSignOnEntry	A class that represents entries in the cache of authenticated users.
SingleSignOnListener
SingleSignOnSessionKey	Key used by SSO to identify a session.
SizeException	This exception is thrown, if a requests permitted size is exceeded.
SizeLimitExceededException	Thrown to indicate that the request size exceeds the configured maximum.
SlowQueryReport	Slow query report interceptor.
SlowQueryReport.QueryStats
SlowQueryReport.QueryStatsComparator	Compare QueryStats by their lastInvocation value.
SlowQueryReportJmx	Publishes data to JMX and provides notifications when failures happen.
SlowQueryReportJmxMBean
SmapInput
SmapStratum	Represents the line and file mappings associated with a JSR-045 "stratum".
SmapUtil	Contains static utilities for generating SMAP data based on the current version of Jasper.
Sockaddr	Deprecated. The scope of the APR/Native Library will be reduced in Tomcat 9.1.x / Tomcat Native 2.x and has been reduced in Tomcat 10.1.x / Tomcat Native 2.x onwards to only include those components required to provide OpenSSL integration with the NIO and NIO2 connectors.
Socket	Deprecated. The scope of the APR/Native Library will be reduced in Tomcat 9.1.x / Tomcat Native 2.x and has been reduced in Tomcat 10.1.x / Tomcat Native 2.x onwards to only include those components required to provide OpenSSL integration with the NIO and NIO2 connectors.
SocketBufferHandler
SocketEvent	Defines events that occur per socket that require further processing by the container.
SocketProcessorBase<S>
SocketProperties	Properties that can be set in the <Connector> element in server.xml.
SocketWrapperBase<E>
SocketWrapperBase.BlockingMode
SocketWrapperBase.CompletionCheck
SocketWrapperBase.CompletionHandlerCall
SocketWrapperBase.CompletionState
SoftReferenceObjectPool<T>	A `SoftReference` based `ObjectPool`.
SparseUserDatabase
SparseUserDatabaseMBean	A ModelMBean implementation for the `org.apache.catalina.users.SparseUserDatabase` component.
SpnegoAuthenticator	A SPNEGO authenticator that uses the SPNEGO/Kerberos support built in to Java 6.
SpnegoAuthenticator.SpnegoTokenFixer	This class implements a hack around an incompatibility between the SPNEGO implementation in Windows and the SPNEGO implementation in Java 8 update 40 onwards.
SQLExceptionList	An SQLException based on a list of Throwable causes.
SSICommand	The interface that all SSI commands ( SSIEcho, SSIInclude, ...) must implement.
SSIConditional	SSI command that handles all conditional directives.
SSIConfig	Implements the Server-side #exec command
SSIEcho	Return the result associated with the supplied Server Variable.
SSIExec	Implements the Server-side #exec command
SSIExternalResolver	Interface used by SSIMediator to talk to the 'outside world' ( usually a servlet )
SSIFilter	Filter to process SSI requests within a webpage.
SSIFlastmod	Implements the Server-side #flastmod command
SSIFsize	Implements the Server-side #fsize command
SSIInclude	Implements the Server-side #include command
SSIMediator	Allows the different SSICommand implementations to share data/talk to each other
SSIPrintenv	Implements the Server-side #printenv command
SSIProcessor	The entry point to SSI processing.
SSIServlet	Servlet to process SSI requests within a webpage.
SSIServletExternalResolver	An implementation of SSIExternalResolver that is used with servlets.
SSIServletExternalResolver.ServletContextAndPath
SSIServletRequestUtil
SSISet	Implements the Server-side #set command
SSIStopProcessingException	Exception used to tell SSIProcessor that it should stop processing SSI commands.
SSL
SSLAuthenticator	An Authenticator and Valve implementation of authentication that utilizes SSL certificates to identify client users.
SSLConf
SslConnectorCiphersTask	Ant task that implements the `/sslConnectorCiphers` command supported by the Tomcat manager application.
SSLContext
SSLContext	This interface is needed to override the default SSLContext class to allow SSL implementation pluggability without having to use JCE.
SSLContext.SNICallBack	Interface implemented by components that will receive the call back to select an OpenSSL SSLContext based on the host name requested by the client.
SSLHostConfig	Represents the TLS configuration for a virtual host.
SSLHostConfig.CertificateVerification
SSLHostConfig.Type
SSLHostConfigCertificate
SSLHostConfigCertificate.Type
SSLHostConfigSF	Store SSLHostConfig
SSLImplementation	Provides a factory and base implementation for the Tomcat specific mechanism that allows alternative SSL/TLS implementations to be used without requiring the implementation of a full JSSE provider.
SSLSessionManager	Defines an interface used to manage SSL sessions.
SSLSocket	Deprecated. The scope of the APR/Native Library will be reduced in Tomcat 9.1.x / Tomcat Native 2.x and has been reduced in Tomcat 10.1.x / Tomcat Native 2.x onwards to only include those components required to provide OpenSSL integration with the NIO and NIO2 connectors.
SSLSupport	Defines an interface to interact with SSL sessions.
SSLUtil	Provides a common interface for `SSLImplementation`s to create the necessary JSSE implementation objects for TLS connections created via the JSSE API.
SSLUtil.ProtocolInfo	Optional interface that can be implemented by `SSLEngine`s to indicate that they support ALPN and can provided the protocol agreed with the client.
SSLUtilBase	Common base class for `SSLUtil` implementations.
SSLValve	When using mod_proxy_http, the client SSL information is not included in the protocol (unlike mod_jk and mod_proxy_ajp).
StandardContext	Standard implementation of the Context interface.
StandardContextSF	Store server.xml Context element with all children Store all context at server.xml Store existing app.xml context a conf/enginename/hostname/app.xml Store with backup
StandardEngine	Standard implementation of the Engine interface.
StandardEngine.AccessLogListener
StandardEngine.NoopAccessLog
StandardEngineSF	Store server.xml Element Engine
StandardHost	Standard implementation of the Host interface.
StandardHostSF	Store server.xml Element Host
StandardJarScanFilter
StandardJarScanner	The default `JarScanner` implementation scans the WEB-INF/lib directory followed by the provided classloader and then works up the classloader hierarchy.
StandardManager	Standard implementation of the Manager interface that provides simple session persistence across restarts of this component (such as when the entire server is shut down and restarted, or when a particular web application is reloaded.
StandardPipeline	Standard implementation of a processing Pipeline that will invoke a series of Valves that have been configured to be called in order.
StandardRoot	Provides the resources implementation for a web application.
StandardServer	Standard implementation of the Server interface, available for use (but not required) when deploying and starting Catalina.
StandardServerSF	Store server.xml Server element and children ( Listener,GlobalNamingResource,Service)
StandardService	Standard implementation of the `Service` interface.
StandardServiceSF	Store server.xml Element Service and all children
StandardSession	Standard implementation of the Session interface.
StandardSessionFacade	Facade for the StandardSession object.
StandardSessionIdGenerator
StandardThreadExecutor
StandardVirtualThreadExecutor	An executor that uses a new virtual thread for each task.
StandardWrapper	Standard implementation of the Wrapper interface that represents an individual servlet definition.
StandardWrapperFacade	Facade for the StandardWrapper object.
StartTask	Ant task that implements the `/start` command, supported by the Tomcat manager application.
StatementCache	Interceptor that caches `PreparedStatement` and/or `CallableStatement` instances on a connection.
StatementCacheMBean
StatementDecoratorInterceptor	Implementation of JdbcInterceptor that proxies resultSets and statements.
StatementDecoratorInterceptor.ResultSetProxy
StatementFacade
StatementFinalizer	Keeps track of statements associated with a connection and invokes close upon `Connection.close()` Useful for applications that don't close the associated statements after being done with a connection.
StaticMember
StaticMembershipInterceptor
StaticMembershipInterceptorMBean
StaticMembershipProvider
StaticMembershipProvider.MemberMessage
StaticMembershipService
StaticMembershipServiceMBean
Status	Deprecated. The scope of the APR/Native Library will be reduced in Tomcat 9.1.x / Tomcat Native 2.x and has been reduced in Tomcat 10.1.x / Tomcat Native 2.x onwards to only include those components required to provide OpenSSL integration with the NIO and NIO2 connectors.
StatusManagerServlet	This servlet will display a complete status of the HTTP/1.1 connector.
StatusTransformer	This is a refactoring of the servlet to externalize the output into a simple class.
Stdlib	Deprecated. The scope of the APR/Native Library will be reduced in Tomcat 9.1.x / Tomcat Native 2.x and has been reduced in Tomcat 10.1.x / Tomcat Native 2.x onwards to only include those components required to provide OpenSSL integration with the NIO and NIO2 connectors.
StopPooledThreadException	A custom `RuntimeException` thrown by the `ThreadPoolExecutor` to signal that the thread should be disposed of.
StopTask	Ant task that implements the `/stop` command, supported by the Tomcat manager application.
Store	A Store is the abstraction of a Catalina component that provides persistent storage and loading of Sessions and their associated user data.
StoreAppender	StoreAppends generate really the xml tag elements
StoreBase	Abstract implementation of the `Store` interface to support most of the functionality required by a `Store`.
StoreConfig	Store Server/Service/Host/Context at file or PrintWriter.
StoreConfigLifecycleListener	Loads and registers a StoreConfig MBean with the name Catalina:type=StoreConfig.
StoreContextAppender	store StandardContext Attributes ...
StoreDescription	Bean of a StoreDescription
StoreFactoryBase	StoreFactory saves special elements.
StoreFactoryRule	Rule that creates a new `IStoreFactory` instance, and associates it with the top object on the stack (which must implement `IStoreFactory`).
StoreFileMover	Move server.xml or context.xml as backup
StoreLoader	XML Format
StoreManager	PersistentManager would have been a better name but that would have clashed with the implementation name.
StoreRegistry	Central StoreRegistry for all server.xml elements
Stream
StreamELResolverImpl
StreamProvider
Streams	Utility class for working with streams.
Strftime	Converts dates to strings using the same format specifiers as strftime Notes: This does not mimic strftime perfectly.
StringCache	This class implements a String cache for ByteChunk and CharChunk.
StringInterpreter	Defines the interface for the String interpreter.
StringInterpreterEnum	Provides an optimised conversion of string values to Enums.
StringInterpreterFactory	Provides `StringInterpreter` instances for JSP compilation.
StringInterpreterFactory.DefaultStringInterpreter
StringManager	An internationalization / localization helper class which reduces the bother of handling ResourceBundles and takes care of the common cases of message formatting which otherwise require the creation of Object arrays and such.
StringManager	An internationalization / localization helper class which reduces the bother of handling ResourceBundles and takes care of the common cases of message formatting which otherwise require the creation of Object arrays and such.
StringManager	An internationalization / localization helper class which reduces the bother of handling ResourceBundles and takes care of the common cases of message formatting which otherwise require the creation of Object arrays and such.
StringUtil
StringUtils	Utility methods to build a separated list from a given set (not java.util.Set) of inputs and return that list as a string or append it to an existing StringBuilder.
StringUtils	Deprecated. Unused.
StructuredField	Parsing of structured fields as per RFC 8941.
StuckThreadDetectionValve	This valve allows to detect requests that take a long time to process, which might indicate that the thread that is processing it is stuck.
Substitution
Substitution.RewriteCondBackReferenceElement
Substitution.ServerVariableElement
Substitution.ServerVariableEnvElement
Substitution.ServerVariableHttpElement
Substitution.ServerVariableSslElement
Substitution.StaticElement
Substitution.SubstitutionElement
SwallowedExceptionListener	Pools that unavoidably swallow exceptions may be configured with an instance of this listener so the user may receive notification of when this happens.
SwallowedExceptionLogger	Class for logging swallowed exceptions.
SynchronizedQueue<T>	This is intended as a (mostly) GC-free alternative to `ConcurrentLinkedQueue` when the requirement is to create an unbounded queue with no requirement to shrink the queue.
SynchronizedStack<T>	This is intended as a (mostly) GC-free alternative to `Stack` when the requirement is to create a pool of re-usable objects with no requirement to shrink the pool.
SystemLogHandler	This helper class may be used to do sophisticated redirection of System.out and System.err on a per Thread basis.
SystemPropertySource	A `IntrospectionUtils.SecurePropertySource` that uses system properties to resolve expressions.
TagConstants
TagFileXml	Bare-bone model of a tag file loaded from a TLD.
TagHandlerPool	Pool of tag handlers that can be reused.
TaglibDescriptorImpl
TaglibXml	Common representation of a Tag Library Descriptor (TLD) XML file.
TagPlugin	This interface is to be implemented by the plugin author, to supply an alternate implementation of the tag handlers.
TagPluginContext	This interface allows the plugin author to make inquiries about the properties of the current tag, and to use Jasper resources to generate direct Java codes in place of tag handler invocations.
TagPluginManager	Manages tag plugin optimizations.
TagPluginParser	Parser for Tag Plugin descriptors.
TagXml	Model of a tag define in a tag library descriptor.
TaskQueue	As task queue specifically designed to run with a thread pool executor.
TaskThread	A Thread implementation that records the time at which it was created.
TaskThreadFactory	Simple task thread factory to use to create threads for an executor implementation.
TcclThreadFactory	ThreadFactory implementation that creates threads with the thread context class loader set to the class loader that loaded this factory.
TcpFailureDetector	The TcpFailureDetector is a useful interceptor that adds reliability to the membership layer.
TcpFailureDetectorMBean
TcpPingInterceptor	Sends a ping to all members.
TcpPingInterceptorMBean
TcpSender
TE
TextOptimizer
Thread	Deprecated. The scope of the APR/Native Library will be reduced in Tomcat 9.1.x / Tomcat Native 2.x and has been reduced in Tomcat 10.1.x / Tomcat Native 2.x onwards to only include those components required to provide OpenSSL integration with the NIO and NIO2 connectors.
ThreadBindingListener	Callback for establishing naming association when entering the application scope.
ThreaddumpTask	Ant task that implements the `/threaddump` command supported by the Tomcat manager application.
ThreadLocalLeakPreventionListener	A `LifecycleListener` that triggers the renewal of threads in Executor pools when a `Context` is being stopped to avoid thread-local related memory leaks.
ThreadPoolExecutor	An `ExecutorService` that executes each submitted task using one of possibly several pooled threads, normally configured using `Executors` factory methods.
ThreadPoolExecutor.AbortPolicy	A handler for rejected tasks that throws a `RejectedExecutionException`.
ThreadPoolExecutor.CallerRunsPolicy	A handler for rejected tasks that runs the rejected task directly in the calling thread of the `execute` method, unless the executor has been shut down, in which case the task is discarded.
ThreadPoolExecutor.DiscardOldestPolicy	A handler for rejected tasks that discards the oldest unhandled request and then retries `execute`, unless the executor is shut down, in which case the task is discarded.
ThreadPoolExecutor.DiscardPolicy	A handler for rejected tasks that silently discards the rejected task.
ThreadPoolExecutor.RejectedExecutionHandler
ThresholdingOutputStream	An output stream which triggers an event when a specified number of bytes of data have been written to it.
ThroughputInterceptor
ThroughputInterceptorMBean
ThrowableCallStack	CallStack strategy that uses the stack trace from a `Throwable`.
Time	Deprecated. The scope of the APR/Native Library will be reduced in Tomcat 9.1.x / Tomcat Native 2.x and has been reduced in Tomcat 10.1.x / Tomcat Native 2.x onwards to only include those components required to provide OpenSSL integration with the NIO and NIO2 connectors.
TimeBucketCounter	This class maintains a thread safe hash map that has timestamp-based buckets followed by a string for a key, and a counter for a value. each time the increment() method is called it adds the key if it does not exist, increments its value and returns it. a maintenance thread cleans up keys that are prefixed by previous timestamp buckets.
TldCache	This class caches parsed instances of TLD files to remove the need for the same TLD to be parsed for each JSP that references it.
TldParser	Parses a Tag Library Descriptor.
TldPreScanned
TldResourcePath	A TLD Resource Path as defined in JSP 7.3.2.
TldRuleSet	RulesSet for digesting TLD files.
TldRuleSet.Attribute
TldRuleSet.Variable
TldScanner	Scans for and loads Tag Library Descriptors contained in a web application.
TLS	Deprecated. Unused.
TLSCertificateReloadListener	A `LifecycleListener` that may be used to monitor the expiration dates of TLS certificates and trigger automatic reloading of the TLS configuration a set number of days before the TLS certificate expires.
TLSClientHelloExtractor	This class extracts the SNI host name and ALPN protocols from a TLS client-hello message.
TLSClientHelloExtractor.ExtractorResult
TLSUtil
TokenList
TokenStreamProvider
Tomcat	Minimal tomcat starter for embedding/unit tests.
Tomcat.DefaultWebXmlListener	Fix reload - required if reloading and using programmatic configuration.
Tomcat.ExistingStandardWrapper	Helper class for wrapping existing servlets.
Tomcat.FixContextListener	Fix startup sequence - required if you don't use web.xml.
TomcatCSS
TomcatJarInputStream	The purpose of this sub-class is to obtain references to the JarEntry objects for META-INF/ and META-INF/MANIFEST.MF that are otherwise swallowed by the JarInputStream implementation.
TomcatPrincipal	Defines additional methods implemented by `Principal`s created by Tomcat's standard `Realm` implementations.
TomcatURLStreamHandlerFactory
Tool	General purpose wrapper for command line tools that should execute in an environment with the common class loader environment set up by Catalina.
TooManyActiveSessionsException	An exception that indicates the maximum number of active sessions has been reached and the server is refusing to create any new sessions.
ToStringUtil	Utility class used to help generate return values for calls to `Object.toString()`.
ToStringUtil	Utility class used to provide String representations of objects.
TrackedUse	Allows pooled objects to make information available about when and how they were used available to the object pool.
TrackedWebResource
TransactionContext	TransactionContext represents the association between a single XAConnectionFactory and a Transaction.
TransactionContextListener	A listener for transaction completion events.
TransactionFactory	Object factory for User transactions.
TransactionRef	Represents a reference address to a transaction.
TransactionRegistry	TransactionRegistry tracks Connections and XAResources in a transacted environment for a single XAConnectionFactory.
Transformation	The internal representation of the transformation that a WebSocket extension performs on a message.
TransformationFactory
TransformationResult
TrapException	Interceptor that traps any unhandled exception types and throws an exception that has been declared by the method called, or throw an SQLException if it is declared.
TrimSpacesOption
TwoPhaseCommitInterceptor
TwoPhaseCommitInterceptor.MapEntry
Txt2Html	Ant task to convert a given set of files from Text to HTML.
UDecoder	All URL decoding happens here.
UEncoder	Efficient implementation of a UTF-8 encoder.
UEncoder.SafeCharsSet
UndeployMessage
UndeployTask	Ant task that implements the `/undeploy` command, supported by the Tomcat manager application.
UniqueAttributesImpl	Wraps the default attributes implementation and ensures that each attribute has a unique qname as required by the JSP specification.
UniqueId	Represents a globally unique Id.
Upgrade
UpgradeApplicationBufferHandler	Trivial implementation of `ApplicationBufferHandler` to support saving of HTTP request bodies during an HTTP/1.1 upgrade.
UpgradeGroupInfo	This aggregates the data collected from each UpgradeInfo instance.
UpgradeInfo	Structure to hold statistical information about connections that have been established using the HTTP/1.1 upgrade mechanism.
UpgradeProcessorBase
UpgradeProcessorExternal
UpgradeProcessorInternal
UpgradeProtocol
UpgradeServletInputStream
UpgradeServletOutputStream
UpgradeToken	Token used during the upgrade process.
UpgradeUtil
UploadContext	Enhanced access to the request information needed for file uploads, which fixes the Content Length data access in `RequestContext`.
UriTemplate	Extracts path parameters from URIs used to create web socket connections using the URI template defined for the associated Endpoint.
UriUtil	Utility class for working with URIs and URLs.
Url
URLEncoder	This class is very similar to the java.net.URLEncoder class.
UrlJar	Implementation of `Jar` that is optimised for non-file based JAR URLs.
UsageTracking<T>	This interface may be implemented by an object pool to enable clients (primarily those clients that wrap pools to provide pools with extended features) to provide additional information to the pool relating to object using allowing more informed decisions and reporting to be made regarding abandoned objects.
User	Abstract representation of a user in a `UserDatabase`.
User	Deprecated. The scope of the APR/Native Library will be reduced in Tomcat 9.1.x / Tomcat Native 2.x and has been reduced in Tomcat 10.1.x / Tomcat Native 2.x onwards to only include those components required to provide OpenSSL integration with the NIO and NIO2 connectors.
UserConfig	Startup event listener for a Host that configures Contexts (web applications) for all defined "users" who have a web application in a directory with the specified name in their home directories.
UserDatabase	Abstraction of the set of users defined by the operating system on the current server platform.
UserDatabase	Abstract representation of a database of `User`s and `Group`s that can be maintained by an application, along with definitions of corresponding `Role`s, and referenced by a `Realm` for authentication and access control.
UserDatabaseRealm	Implementation of `Realm` that is based on an implementation of `UserDatabase` made available through the JNDI resources configured for this instance of Catalina.
UserDatabaseRealm.UserDatabasePrincipal
UserDataHelper	This helper class assists with the logging associated with invalid input data.
UserDataHelper.Mode	Log mode for the next log message.
UserMBean	A ModelMBean implementation for the `org.apache.catalina.User` component.
Utf8Decoder	Decodes bytes to UTF-8.
Utf8Encoder	Encodes characters as bytes using UTF-8.
Util	Util contains some often used consts, static methods and embedded class to support the JSTL tag plugin.
Util
Util	Utility class for internal use only within the `org.apache.tomcat.websocket` package.
Util.DecoderMatch
Util.ImportResponseWrapper	Wraps responses to allow us to retrieve results as Strings.
Utils
Utils
Utils	Utility methods.
UUIDGenerator	Smple generation of a UUID.
Validation
Validator	Interface to be implemented by custom validator classes.
ValidatorTask	Task for validating a web application deployment descriptor, using XML schema validation.
ValidatorXml	Model of a Tag Library Validator from the XML descriptor.
ValueExpressionImpl	An `Expression` that can get or set a value.
ValueExpressionLiteral
Valve	A Valve is a request processing component associated with a particular Container.
ValveBase	Convenience base class for implementations of the Valve interface.
VariableMapperFactory
VariableMapperImpl
VariableResolverImpl	Deprecated.
Vary	Deprecated. Use `TokenList`.
VerbatimFormatter	Outputs the just the log message with no additional elements.
VersionLoggerListener	Logs version information on startup.
VirtualResource
VirtualThreadExecutor	An executor that uses a new virtual thread for each task.
VminfoTask	Ant task that implements the `/vminfo` command supported by the Tomcat manager application.
VoidInputFilter	Void input filter, which returns -1 when attempting a read.
VoidOutputFilter	Void output filter, which silently swallows bytes written.
WarResource	Represents a single resource (file or directory) that is located within a WAR.
WarResourceSet	Represents a `WebResourceSet` based on a WAR file.
WarURLConnection
WarWatcher	The WarWatcher watches the deployDir for changes made to the directory (adding new WAR files->deploy or remove WAR files->undeploy) and notifies a listener of the changes made.
WarWatcher.WarFilter	File name filter for war files
WarWatcher.WarInfo	File information on existing WAR files
WatchedResourceSF
WebAnnotationSet	AnnotationSet for processing the annotations of the web application classes (`/WEB-INF/classes` and `/WEB-INF/lib`).
WebappClassLoader
WebappClassLoaderBase	Specialized web application class loader.
WebappClassLoaderBase.PrivilegedGetClassLoader
WebappLoader	Classloader implementation which is specialized for handling web applications in the most efficient way, while being Catalina aware (all accesses to resources are made through `WebResourceRoot`).
WebappProperties	An interface intended for use by class loaders associated with a web application that enables them to provide additional information to JULI about the web application with which they are associated.
WebappServiceLoader<T>	A variation of Java's JAR ServiceLoader that respects exclusion rules for web applications.
WebdavFixFilter	Deprecated. This will be removed in Tomcat 11 onwards.
WebdavIfHeader	The `IfHeader` class represents the state lists defined through the HTTP If header, which is specified in RFC 2518 as follows :
WebdavServlet	This servlet adds support for WebDAV level 3.
WebdavServlet.MemoryPropertyStore	Default property store, which provides memory storage without persistence.
WebdavServlet.PropertyStore	Handling of dead properties on resources.
WebdavServlet.ProppatchOperation	Represents a PROPPATCH sub operation to be performed.
WebResource	Represents a file or directory within a web application.
WebResourceLockSet	Interface implemented by `WebResourceSet` implementations that wish to provide locking functionality.
WebResourceLockSet.ResourceLock
WebResourceRoot	Represents the complete set of resources for a web application.
WebResourceRoot.ArchiveIndexStrategy
WebResourceRoot.CacheStrategy	Provides a mechanism to modify the caching behaviour.
WebResourceRoot.ResourceSetType
WebResourceRootSF	Generate Resources element
WebResourceSet	Represents a set of resources that are part of a web application.
WebRuleSet	RuleSet for processing the contents of a web application deployment descriptor (`/WEB-INF/web.xml`) resource.
WebXml	Representation of common elements of web.xml and web-fragment.xml.
WebXmlParser
When
WrappedMessageHandler
Wrapper	A Wrapper is a Container that represents an individual servlet definition from the deployment descriptor of the web application.
WrapperLifecycleSF
WrapperListenerSF
WrapperMappingInfo	Encapsulates information used to register a Wrapper mapping.
WriteBuffer	Provides an expandable set of buffers for writes.
WriteBuffer.Sink	Interface implemented by clients of the WriteBuffer to enable data to be written back out from the buffer.
WsContainerProvider
WsContextListener	In normal usage, this `ServletContextListener` does not need to be explicitly configured as the `WsSci` performs all the necessary bootstrap and installs this listener in the `ServletContext`.
WsExtension
WsExtensionParameter
WsFilter	Handles the initial HTTP connection for WebSocket connections.
WsFrameBase	Takes the ServletInputStream, processes the WebSocket frames it contains and extracts the messages.
WsFrameBase.ReadState	WAITING - not suspended Server case: waiting for a notification that data is ready to be read from the socket, the socket is registered to the poller Client case: data has been read from the socket and is waiting for data to be processed PROCESSING - not suspended Server case: reading from the socket and processing the data Client case: processing the data if such has already been read and more data will be read from the socket SUSPENDING_WAIT - suspended, a call to suspend() was made while in WAITING state.
WsFrameClient
WsFrameServer
WsHandshakeRequest	Represents the request that this session was opened under.
WsHandshakeResponse	Represents the response to a WebSocket handshake.
WsHttpUpgradeHandler	Servlet 3.1 HTTP upgrade handler for WebSocket connections.
WsIOException	Allows the WebSocket implementation to throw an `IOException` that includes a `CloseReason` specific to the error that can be passed back to the client.
WsPongMessage
WsRemoteEndpointAsync
WsRemoteEndpointBase
WsRemoteEndpointBasic
WsRemoteEndpointImplBase
WsRemoteEndpointImplClient
WsRemoteEndpointImplServer	This is the server side `RemoteEndpoint` implementation - i.e. what the server uses to send data to the client.
WsSci	Registers an interest in any class that is annotated with `ServerEndpoint` so that Endpoint can be published via the WebSocket server.
WsServerContainer	Provides a per class loader (i.e. per web application) instance of a ServerContainer.
WsSession
WsSessionListener
WsWebSocketContainer
WsWriteTimeout	Provides timeouts for asynchronous web socket writes.
X509SubjectDnRetriever	An X509UsernameRetriever that returns a certificate's entire SubjectDN as the username.
X509UsernameRetriever	Provides an interface for retrieving a user name from an X509Certificate.
XAConnectionFactory	XAConnectionFactory is an extension of ConnectionFactory used to create connections in a transaction managed environment.
XADataSource
XByteBuffer	The XByteBuffer provides a dual functionality.
XmlEncodingBase	Base class for those elements that need to track the encoding used in the source XML.
XmlErrorHandler
XmlIdentifiers	Defines constants for well-known Public and System identifiers documented by the Servlet and JSP specifications.
XMLWriter	XMLWriter helper class.