All Classes

Class	Description
AbsoluteTimeDateFormat	Formats a Date in the format "HH:mm:ss,SSS" for example, "15:49:37,459".
Appender	Implement this interface for your own strategies for outputting log statements.
AppenderAttachable	Interface for attaching appenders to objects.
AppenderAttachableImpl	A straightforward implementation of the AppenderAttachable interface.
AppenderSkeleton	Abstract superclass of the other appenders in the package.
AsyncAppender	The AsyncAppender lets users log events asynchronously.
AttributesRenderer	Render org.xml.sax.Attributes objects.
BasicConfigurator	Use this class to quickly configure the package.
BoundedFIFO	BoundedFIFO serves as the bounded first-in-first-out buffer heavily used by the AsyncAppender.
BridgePatternConverter	The class implements the pre log4j 1.3 org.apache.log4j.helpers.PatternConverter contract by delegating to the log4j 1.3 pattern implementation.
BridgePatternParser	The class implements the pre log4j 1.3 org.apache.log4j.helpers.PatternConverter contract by delegating to the log4j 1.3 pattern implementation.
CachedDateFormat	CachedDateFormat optimizes the performance of a wrapped DateFormat.
Category	This class has been deprecated and replaced by the Logger subclass.
ClassNamePatternConverter	Formats the class name of the site of the logging request.
Configurator	Implemented by classes capable of configuring log4j using a URL.
ConsoleAppender	ConsoleAppender appends log events to System.out or System.err using a layout specified by the user.
CountingQuietWriter	Counts the number of bytes written.
COWArrayList<E>	A GC-free lock-free thread-safe implementation of the List interface for use cases where iterations over the list vastly out-number modifications on the list.
CyclicBuffer	CyclicBuffer is used by other appenders to hold LoggingEvents for immediate or differed display.
DailyRollingFileAppender	DailyRollingFileAppender extends FileAppender so that the underlying file is rolled over at a user chosen frequency.
DateLayout	This abstract layout takes care of all the date related options and formatting work.
DatePatternConverter	Convert and format the event's date in a StringBuffer.
DateTimeDateFormat	Formats a Date in the format "dd MMM yyyy HH:mm:ss,SSS" for example, "06 Nov 1994 15:49:37,459".
DefaultRepositorySelector
DefaultThrowableRenderer	Default implementation of ThrowableRenderer using Throwable.printStackTrace.
DenyAllFilter	This filter drops all logging events.
DOMConfigurator	Use this class to initialize the log4j environment using a DOM tree.
EnhancedPatternLayout	This class is an enhanced version of org.apache.log4j.PatternLayout which was originally developed as part of the abandoned log4j 1.3 effort and has been available in the extras companion.
EnhancedThrowableRenderer	Enhanced implementation of ThrowableRenderer.
ErrorCode	This interface defines commonly encoutered error codes.
ErrorHandler	Appenders may delegate their error handling to ErrorHandlers.
ExternallyRolledFileAppender	This appender listens on a socket on the port specified by the Port property for a "RollOver" message.
FallbackErrorHandler	The FallbackErrorHandler implements the ErrorHandler interface such that a secondary appender may be specified.
FileAppender	FileAppender appends log events to a file.
FileDatePatternConverter	Formats an date by delegating to DatePatternConverter.
FileLocationPatternConverter	Return the event's line location information in a StringBuffer.
FileWatchdog	Check every now and then that a certain file has not changed.
Filter	Users should extend this class to implement customized logging event filtering.
FormattingInfo	FormattingInfo instances contain the information obtained when parsing formatting modifiers in conversion modifiers.
FormattingInfo	Modifies the output of a pattern converter for a specified minimum and maximum width and alignment.
FullLocationPatternConverter	Format the event's line location information.
HardenedLoggingEventInputStream
HardenedObjectInputStream	HardenedObjectInputStream restricts the set of classes that can be deserialized to a set of explicitly whitelisted classes.
Hierarchy	This class is specialized in retrieving loggers by name and also maintaining the logger hierarchy.
HierarchyEventListener	Listen to events occuring within a Hierarchy.
HTMLLayout	This layout outputs events in a HTML table.
IntegerPatternConverter	Formats an integer.
ISO8601DateFormat	Formats a Date in the format "yyyy-MM-dd HH:mm:ss,SSS" for example "1999-11-27 15:49:37,459".
JDBCAppender	The JDBCAppender provides for sending log events to a database.
JMSAppender	A simple appender that publishes events to a JMS Topic.
JMSSink	A simple application that consumes logging events sent by a JMSAppender.
JNDIUtil
Layout	Extend this abstract class to create your own log layout format.
Level	Defines the minimum set of levels recognized by the system, that is OFF, FATAL, ERROR, WARN, INFO, DEBUG and ALL.
LevelMatchFilter	This is a very simple filter based on level matching.
LevelPatternConverter	Return the event's level in a StringBuffer.
LevelRangeFilter	This is a very simple filter based on level matching, which can be used to reject messages with priorities outside a certain range.
LineLocationPatternConverter	Return the event's line location information in a StringBuffer.
LineSeparatorPatternConverter	Formats a line separator.
LiteralPatternConverter	Formats a string literal.
Loader	Load resources (or images) from various sources.
LocationInfo	The internal representation of caller location information.
Log4jEntityResolver	An EntityResolver specifically designed to return log4j.dtd which is embedded within the log4j jar file.
LogEvent	This class is a copy of o.a.l.spi.LoggingEvent from log4j 1.2.15 which has been renamed to keep the same overall class name length to allow a serialization written with a prior instance of o.a.l.spi.LoggingEvent to be deserialized with this class just by mangling the class name in the byte stream.
Logger	This is the central class in the log4j package.
LoggerFactory	Implement this interface to create new instances of Logger or a sub-class of Logger.
LoggerPatternConverter	Formats a logger name.
LoggerRepository	A LoggerRepository is used to create and retrieve Loggers.
LoggingEvent	The internal representation of logging events.
LoggingEventPatternConverter	LoggingEventPatternConverter is a base class for pattern converters that can format information from instances of LoggingEvent.
LogLog	This class used to output log statements from within the log4j package.
LogManager	Use the LogManager class to retreive Logger instances or to operate on the current LoggerRepository.
LogMF	This class provides parameterized logging services using the pattern syntax of java.text.MessageFormat.
LogSF	This class provides parameterized logging services using the SLF4J pattern syntax.
LogXF	This is a base class for LogMF and LogSF parameterized logging classes.
Main	The main application.
MapRewritePolicy	This policy rewrites events where the message of the original event implementes java.util.Map.
MDC	The MDC class is similar to the NDC class except that it is based on a map instead of a stack.
MDCKeySetExtractor
MessagePatternConverter	Return the event's rendered message in a StringBuffer.
MessageRenderer	Render javax.jms.Message objects.
MethodLocationPatternConverter	Return the event's line location information in a StringBuffer.
NameAbbreviator	NameAbbreviator generates abbreviated logger and class names.
NamePatternConverter	Base class for other pattern converters which can return only parts of their name.
NDC	The NDC class implements nested diagnostic contexts as defined by Neil Harrison in the article "Patterns for Logging Diagnostic Messages" part of the book "Pattern Languages of Program Design 3" edited by Martin et al.
NDCPatternConverter	Return the event's NDC in a StringBuffer.
NOPLogger	No-operation implementation of Logger used by NOPLoggerRepository.
NOPLoggerRepository	No-operation implementation of LoggerRepository which is used when LogManager.repositorySelector is erroneously nulled during class reloading.
NullAppender	A NullAppender merely exists, it never outputs a message to any device.
NullEnumeration	An always-empty Enumerator.
ObjectRenderer	Implement this interface in order to render objects as strings.
OnlyOnceErrorHandler	The OnlyOnceErrorHandler implements log4j's default error handling policy which consists of emitting a message for the first error in an appender and ignoring all following errors.
OptionConverter	A convenience class to convert property values to specific types.
OptionHandler	A string based interface to configure package components.
PatternConverter	PatternConverter is an abtract class that provides the formatting functionality that derived classes need.
PatternConverter	PatternConverter is an abstract class that provides the formatting functionality that derived classes need.
PatternLayout	A flexible layout configurable with pattern string.
PatternParser	Most of the work of the PatternLayout class is delegated to the PatternParser class.
PatternParser	Most of the work of the EnhancedPatternLayout class is delegated to the PatternParser class.
Priority	Refrain from using this class directly, use the Level class instead.
PropertiesPatternConverter	Able to handle the contents of the LoggingEvent's Property bundle and either output the entire contents of the properties in a similar format to the java.util.Hashtable.toString(), or to output the value of a specific key within the property bundle when this pattern converter has the option set.
PropertyConfigurator	Allows the configuration of log4j from an external file.
PropertyGetter	Used for inferring configuration information for a log4j's component.
PropertyGetter.PropertyCallback
PropertyPrinter	Prints the configuration of the log4j default hierarchy (which needs to be auto-initialized) as a propoperties file on a PrintWriter.
PropertyRewritePolicy	This policy rewrites events by adding a user-specified list of properties to the event.
PropertySetter	General purpose Object property setter.
PropertySetterException	Thrown when an error is encountered whilst attempting to set a property using the PropertySetter utility class.
QuietWriter	QuietWriter does not throw exceptions when things go wrong.
ReflectionRewritePolicy	This policy rewrites events by evaluating any JavaBean properties on the message object and adding them to the event properties.
RelativeTimeDateFormat	Formats a Date by printing the number of milliseconds elapsed since construction of the format.
RelativeTimePatternConverter	Return the relative time in milliseconds since loading of the LoggingEvent class.
ReloadingPropertyConfigurator
RendererMap	Map class objects to an ObjectRenderer.
RendererSupport
RepositorySelector	The LogManager uses one (and only one) RepositorySelector implementation to select the LoggerRepository for a particular application context.
RewriteAppender	This appender forwards a logging request to another appender after possibly rewriting the logging event.
RewritePolicy	This interface is implemented to provide a rewrite strategy for RewriteAppender.
Roller	A simple application to send roll over messages to a potentially remote ExternallyRolledFileAppender.
RollingFileAppender	RollingFileAppender extends FileAppender to backup the log files when they reach a certain size.
RootCategory	Deprecated. Replaced by RootLogger.
RootLogger	RootLogger sits at the top of the logger hierachy.
SAXErrorHandler
SequenceNumberPatternConverter	Formats the event sequence number.
SimpleLayout	SimpleLayout consists of the level of the log statement, followed by " - " and then the log message itself.
SimpleSocketServer	A simple SocketNode based server.
SMTPAppender	Send an e-mail when a specific logging event occurs, typically on errors or fatal errors.
SocketAppender	Sends LoggingEvent objects to a remote a log server, usually a SocketNode.
SocketHubAppender	Sends LoggingEvent objects to a set of remote log servers, usually a SocketNodes.
SocketNode	Read LoggingEvent objects sent from a remote client using Sockets (TCP).
SocketServer	A SocketNode based server that uses a different hierarchy for each client.
StringMatchFilter	This is a very simple filter based on string matching.
SyslogAppender	Use SyslogAppender to send log messages to a remote syslog daemon.
SyslogQuietWriter	SyslogQuietWriter extends QuietWriter by prepending the syslog level code before each printed String.
SyslogWriter	SyslogWriter is a wrapper around the java.net.DatagramSocket class so that it behaves like a java.io.Writer.
TelnetAppender	The TelnetAppender is a log4j appender that specializes in writing to a read-only socket.
ThreadGroupRenderer	Render ThreadGroup objects in a format similar to the information output by the ThreadGroup.list() method.
ThreadLocalMap	ThreadLocalMap extends InheritableThreadLocal to bequeath a copy of the hashtable of the MDC of the parent thread.
ThreadPatternConverter	Formats the event thread name.
ThrowableInformation	ThrowableInformation is log4j's internal representation of throwables.
ThrowableInformationPatternConverter	Outputs the ThrowableInformation portion of the LoggingEvent.
ThrowableRenderer	Implemented by classes that render instances of java.lang.Throwable (exceptions and errors) into a string representation.
ThrowableRendererSupport	Implemented by logger repositories that support configurable rendering of Throwables.
Transform	Utility class for transforming strings.
TriggeringEventEvaluator	Implementions of this interface allow certain appenders to decide when to perform an appender specific action.
TTCCLayout	TTCC layout format consists of time, thread, category and nested diagnostic context information, hence the name.
UnrecognizedElementHandler	When implemented by an object configured by DOMConfigurator, the handle method will be called when an unrecognized child element is encountered.
UtilLoggingLevel	An extension of the Level class that provides support for java.util.logging Levels.
VersionUtil
WriterAppender	WriterAppender appends log events to a Writer or an OutputStream depending on the user's choice.
XMLLayout	The output of the XMLLayout consists of a series of log4j:event elements as defined in the log4j.dtd.
ZeroConfSupport