org.tentackle.persist.rmi

Class RemoteDbSessionCleanupThread

java.lang.Object

java.lang.Thread

org.tentackle.persist.rmi.RemoteDbSessionCleanupThread

All Implemented Interfaces:

Runnable, Scavenger

public class RemoteDbSessionCleanupThread
extends Thread
implements Scavenger

Cleans up dead or crashed sessions.

Author:

harald

Nested Class Summary

Nested classes/interfaces inherited from class java.lang.Thread

Thread.State, Thread.UncaughtExceptionHandler

Field Summary

Fields inherited from class java.lang.Thread

MAX_PRIORITY, MIN_PRIORITY, NORM_PRIORITY

Constructor Summary

Constructors

Constructor and Description
RemoteDbSessionCleanupThread(long checkInterval, Set<WeakReference<RemoteDbSessionImpl>> sessions, int cleanupRetryMax) Creates the cleanup thread.

Method Summary

Modifier and Type	Method and Description
protected void	cleanupSession(RemoteDbSessionImpl session) Cleans up a session.
protected boolean	cleanupZombieSession(RemoteDbSessionImpl session) Cleans up a zombie session.
protected void	cleanupZombieSessions() Cleans up all zombie sessions.
boolean	isScavenging()
void	requestTermination() Requests thread termination.
void	run()
protected void	verifySessions() Verifies and cleans up the sessions.

Methods inherited from class java.lang.Thread

activeCount, checkAccess, clone, countStackFrames, currentThread, destroy, dumpStack, enumerate, getAllStackTraces, getContextClassLoader, getDefaultUncaughtExceptionHandler, getId, getName, getPriority, getStackTrace, getState, getThreadGroup, getUncaughtExceptionHandler, holdsLock, interrupt, interrupted, isAlive, isDaemon, isInterrupted, join, join, join, resume, setContextClassLoader, setDaemon, setDefaultUncaughtExceptionHandler, setName, setPriority, setUncaughtExceptionHandler, sleep, sleep, start, stop, stop, suspend, toString, yield

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.tentackle.daemon.Scavenger

isScavenger

Constructor Detail

RemoteDbSessionCleanupThread

public RemoteDbSessionCleanupThread(long checkInterval,
                                    Set<WeakReference<RemoteDbSessionImpl>> sessions,
                                    int cleanupRetryMax)

Creates the cleanup thread.

Parameters:

checkInterval - milliseconds to sleep between runs

sessions - the sessions

cleanupRetryMax - maximum number of retries to clean up a session

Method Detail

requestTermination

public void requestTermination()

Requests thread termination.

isScavenging

public boolean isScavenging()

Specified by:

isScavenging in interface Scavenger

run

public void run()

Specified by:

run in interface Runnable

Overrides:

run in class Thread

verifySessions

protected void verifySessions()

Verifies and cleans up the sessions.

Finds all db-groups or non-grouped db that are not alive anymore and closes their sessions. If _all_ dbs of a group have timed out, the whole group is closed. Usually the ModificationThread of a client connection will keep up a db-group alive. If the application uses only a single db-session, it must set the db-alive manually.

cleanupSession

protected void cleanupSession(RemoteDbSessionImpl session)

Cleans up a session.

Parameters:

session - the session

cleanupZombieSessions

protected void cleanupZombieSessions()

Cleans up all zombie sessions.

cleanupZombieSession

protected boolean cleanupZombieSession(RemoteDbSessionImpl session)

Cleans up a zombie session.

Parameters:

session - the session

Returns:

true if cleaned up, false if failed