Class OutboundConnectionCacheBlockingImpl<C extends Connection>
java.lang.Object
com.sun.corba.ee.impl.transport.connection.ConnectionCacheBase<C>
com.sun.corba.ee.impl.transport.connection.ConnectionCacheBlockingBase<C>
com.sun.corba.ee.impl.transport.connection.OutboundConnectionCacheBlockingImpl<C>
- All Implemented Interfaces:
ConnectionCache<C>
,OutboundConnectionCache<C>
@ManagedObject
@Description("Outbound connection cache for connections opened by the client")
public final class OutboundConnectionCacheBlockingImpl<C extends Connection>
extends ConnectionCacheBlockingBase<C>
implements OutboundConnectionCache<C>
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Field Summary
FieldsModifier and TypeFieldDescriptionprivate Map
<C, OutboundConnectionState<C>> private Map
<ContactInfo<C>, OutboundCacheEntry<C>> private ReentrantLock
private final int
Fields inherited from class com.sun.corba.ee.impl.transport.connection.ConnectionCacheBlockingBase
totalBusy, totalIdle
Fields inherited from class com.sun.corba.ee.impl.transport.connection.ConnectionCacheBase
reclaimableConnections
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Constructor Summary
ConstructorsConstructorDescriptionOutboundConnectionCacheBlockingImpl
(String cacheType, int highWaterMark, int numberToReclaim, int maxParallelConnections, long ttl) -
Method Summary
Modifier and TypeMethodDescriptionboolean
canCreateNewConnection
(ContactInfo<C> cinfo) Determine whether a new connection could be created by the ConnectionCache or not.void
Close a connection, regardless of whether the connection is busy or not.private Map
<C, OutboundConnectionState<C>> private void
private void
private void
private Map
<ContactInfo<C>, OutboundCacheEntry<C>> entryMap()
get
(ContactInfo<C> cinfo) Behaves the same asOutboundConnectionCache.get(ContactInfo, ConnectionFinder)
except that no connection finder is provided, so that step is ignored.get
(ContactInfo<C> cinfo, ConnectionFinder<C> finder) Return a Connection corresponding to the given ContactInfo.private OutboundConnectionState
<C> getConnectionState
(ContactInfo<C> cinfo, OutboundCacheEntry<C> entry, C conn) private OutboundCacheEntry
<C> getEntry
(ContactInfo<C> cinfo) private boolean
int
Configured maximum number of connections supported per ContactInfo.private void
private boolean
reclaimOrClose
(OutboundConnectionState<C> cs, C conn) void
Release a Connection previously obtained from get.void
responseReceived
(C conn) Decrement the number of expected responses.protected String
private C
tryNewConnection
(OutboundCacheEntry<C> entry, ContactInfo<C> cinfo) Methods inherited from class com.sun.corba.ee.impl.transport.connection.ConnectionCacheBlockingBase
numberOfBusyConnections, numberOfConnections, numberOfIdleConnections, numberOfReclaimableConnections
Methods inherited from class com.sun.corba.ee.impl.transport.connection.ConnectionCacheBase
getCacheType, highWaterMark, numberToReclaim, reclaim, toString
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
Methods inherited from interface com.sun.corba.ee.spi.transport.connection.ConnectionCache
getCacheType, highWaterMark, numberOfBusyConnections, numberOfConnections, numberOfIdleConnections, numberOfReclaimableConnections, numberToReclaim
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Field Details
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lock
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maxParallelConnections
private final int maxParallelConnections -
entryMap
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connectionMap
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Constructor Details
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OutboundConnectionCacheBlockingImpl
public OutboundConnectionCacheBlockingImpl(String cacheType, int highWaterMark, int numberToReclaim, int maxParallelConnections, long ttl)
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Method Details
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maxParallelConnections
@ManagedAttribute public int maxParallelConnections()Description copied from interface:OutboundConnectionCache
Configured maximum number of connections supported per ContactInfo.- Specified by:
maxParallelConnections
in interfaceOutboundConnectionCache<C extends Connection>
- Returns:
- maximum number of connections
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entryMap
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connectionMap
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thisClassName
- Specified by:
thisClassName
in classConnectionCacheBase<C extends Connection>
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canCreateNewConnection
Description copied from interface:OutboundConnectionCache
Determine whether a new connection could be created by the ConnectionCache or not.- Specified by:
canCreateNewConnection
in interfaceOutboundConnectionCache<C extends Connection>
- Parameters:
cinfo
- info to use forConnection
- Returns:
- if a new connection can be created
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internalCanCreateNewConnection
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get
Description copied from interface:OutboundConnectionCache
Behaves the same asOutboundConnectionCache.get(ContactInfo, ConnectionFinder)
except that no connection finder is provided, so that step is ignored.- Specified by:
get
in interfaceOutboundConnectionCache<C extends Connection>
- Parameters:
cinfo
- info on Connection to get- Returns:
Connection
corresponding to the ContactInfo- Throws:
IOException
- if an error occurred
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msg
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display
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get
Description copied from interface:OutboundConnectionCache
Return a Connection corresponding to the given ContactInfo. This works as follows:- Call the finder. If it returns non-null, use that connection; (Note that this may be a new connection, created in the finder). The finder SHOULD NOT create a new connection if canCreateNewConnection returns false, but this is advisory.
- otherwise, Use an idle connection, if one is available;
- otherwise, create a new connection, if not too many connections are open;
- otherwise, use a busy connection.
- there is no existing connection for the ContactInfo
- OR the total number of connections in the cache is less than the HighWaterMark and the number of connections for this ContactInfo is less than MaxParallelConnections.
It is possible that the cache contains connections that no longer connect to their destination. In this case, it is the responsibility of the client of the cache to close the broken connection as they are detected. Connection reclamation may also handle the cleanup, but note that a broken connection with pending responses will never be reclaimed.
Note that the idle and busy connection collections that are passed to the finder are unmodifiable collections. They have iterators that return connections in LRU order, with the least recently used connection first. This is done to aid a finder that wishes to consider load balancing in its determination of an appropriate connection.
- Specified by:
get
in interfaceOutboundConnectionCache<C extends Connection>
- Parameters:
cinfo
- info on Connection to getfinder
- Finder to use to search for Connection- Returns:
Connection
corresponding to the ContactInfo- Throws:
IOException
- if an error occurred
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getEntry
- Throws:
IOException
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tryNewConnection
- Throws:
IOException
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getConnectionState
private OutboundConnectionState<C> getConnectionState(ContactInfo<C> cinfo, OutboundCacheEntry<C> entry, C conn) -
release
Description copied from interface:OutboundConnectionCache
Release a Connection previously obtained from get. Connections that have been released as many times as they have been returned by get are idle; otherwise a Connection is busy. Some number of responses (usually 0 or 1) may be expected ON THE SAME CONNECTION even for an idle connection. We maintain a count of the number of outstanding responses we expect for protocols that return the response on the same connection on which the request was received. This is necessary to prevent reclamation of a Connection that is idle, but still needed to send responses to old requests.- Specified by:
release
in interfaceOutboundConnectionCache<C extends Connection>
- Parameters:
conn
- connection to releasenumResponsesExpected
- number of responses expected
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responseReceived
Decrement the number of expected responses. When a connection is idle and has no expected responses, it can be reclaimed.- Specified by:
responseReceived
in interfaceOutboundConnectionCache<C extends Connection>
- Parameters:
conn
- Connection that has received a response
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reclaimOrClose
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close
Close a connection, regardless of whether the connection is busy or not.- Specified by:
close
in interfaceConnectionCache<C extends Connection>
- Parameters:
conn
- connection to close
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decrementTotalIdle
private void decrementTotalIdle() -
decrementTotalBusy
private void decrementTotalBusy()
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