com.sun.corba.ee.impl.transport

Class ConnectionCacheBase

java.lang.Object

com.sun.corba.ee.impl.transport.ConnectionCacheBase

All Implemented Interfaces:

ConnectionCache

Direct Known Subclasses:

InboundConnectionCacheImpl, OutboundConnectionCacheImpl

public abstract class ConnectionCacheBase
extends Object
implements ConnectionCache

Author:

Harold Carr

Field Summary

Fields

Modifier and Type	Field and Description
protected String	cacheType
protected String	monitoringName
protected ORB	orb
protected long	timestamp
protected static ORBUtilSystemException	wrapper

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	ConnectionCacheBase(ORB orb, String cacheType, String monitoringName)

Method Summary

Modifier and Type	Method and Description
protected abstract Object	backingStore()
protected void	cacheStatisticsInfo()
void	close() Close all connections in the connection cache.
protected void	dprintCreation()
String	getCacheType()
String	getMonitoringName()
long	numberOfBusyConnections()
long	numberOfConnections()
long	numberOfIdleConnections()
boolean	reclaim() Discarding least recently used Connections that are not busy This method must be synchronized since one WorkerThread could be reclaming connections inside the synchronized backingStore block and a second WorkerThread (or a SelectorThread) could have already executed the if (numberOfConnections <= ....
void	stampTime(Connection c)
abstract Collection	values()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

wrapper

protected static final ORBUtilSystemException wrapper

orb

protected ORB orb

timestamp

protected long timestamp

cacheType

protected String cacheType

monitoringName

protected String monitoringName

Constructor Detail

ConnectionCacheBase

protected ConnectionCacheBase(ORB orb,
                              String cacheType,
                              String monitoringName)

Method Detail

getCacheType

@NameValue
public String getCacheType()

Specified by:

getCacheType in interface ConnectionCache

stampTime

public void stampTime(Connection c)

Specified by:

stampTime in interface ConnectionCache

close

public void close()

Description copied from interface: ConnectionCache

Close all connections in the connection cache. This is used as a final cleanup, and will result in abrupt termination of any pending communications.

Specified by:

close in interface ConnectionCache

numberOfConnections

public long numberOfConnections()

Specified by:

numberOfConnections in interface ConnectionCache

numberOfIdleConnections

public long numberOfIdleConnections()

Specified by:

numberOfIdleConnections in interface ConnectionCache

numberOfBusyConnections

public long numberOfBusyConnections()

Specified by:

numberOfBusyConnections in interface ConnectionCache

reclaim

public boolean reclaim()

Discarding least recently used Connections that are not busy This method must be synchronized since one WorkerThread could be reclaming connections inside the synchronized backingStore block and a second WorkerThread (or a SelectorThread) could have already executed the if (numberOfConnections <= .... ). As a result the second thread would also attempt to reclaim connections. If connection reclamation becomes a performance issue, the connection reclamation could make its own task and consequently executed in a separate thread. Currently, the accept & reclaim are done in the same thread, WorkerThread by default. It could be changed such that the SelectorThread would do it for SocketChannels and WorkerThreads for Sockets by updating the ParserTable.

Specified by:

reclaim in interface ConnectionCache

getMonitoringName

public String getMonitoringName()

Specified by:

getMonitoringName in interface ConnectionCache

values

public abstract Collection values()

backingStore

protected abstract Object backingStore()

dprintCreation

protected void dprintCreation()

cacheStatisticsInfo

protected void cacheStatisticsInfo()