org.opencms.main
Class CmsThreadStore

java.lang.Object
  java.lang.Thread
      org.opencms.main.CmsThreadStore

All Implemented Interfaces:

Runnable

public final class CmsThreadStore
extends Thread

The OpenCms "Grim Reaper" thread store were all system Threads are maintained.

This thread executes all 60 seconds and checks if report threads are still active. A report thread usually waits for a user to get the contents written to the report. However, if the user does not request the reports content (e.g. because the browser was closed), then the report thread becomes abandoned. This Grim Reaper will collect all such abandoned report threads and remove them after further 60 seconds.

Moreover, the Grim Reaper checks for all invalid user sessions that have times out for 5 or more minutes, and removes them as well.

Since:

6.0.0

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

protected

CmsThreadStore(CmsSecurityManager securityManager) Hides the public constructor.

Method Summary

void	addThread(A_CmsReportThread thread) Adds a Thread to this Thread store.
protected void	checkPublishQueue() Checks the publish queue for abandoned publish jobs.
protected void	handleDoomedThreads() Handles doomed threads.
protected void	persistData() Takes care of the persistence of data normally held in memory.
A_CmsReportThread	retrieveThread(CmsUUID key) Retrieves a Thread from this Thread store.
void	run()
protected void	shutDown() Shut down this thread store.
protected void	validateSessions() Checks for invalid 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

Constructor Detail

CmsThreadStore

protected CmsThreadStore(CmsSecurityManager securityManager)

Hides the public constructor.

Parameters:

securityManager - needed for scheduling "undercover-jobs" that increase stability and fault tolerance

Method Detail

addThread

public void addThread(A_CmsReportThread thread)

Adds a Thread to this Thread store.

Parameters:

thread - the Thread to add

retrieveThread

public A_CmsReportThread retrieveThread(CmsUUID key)

Retrieves a Thread from this Thread store.

Parameters:

key - the key of the Thread to retrieve

Returns:

the Thread form this Thread store that matches the given key

run

public void run()

Specified by:

run in interface Runnable

Overrides:

run in class Thread

See Also:

Runnable.run()

checkPublishQueue

protected void checkPublishQueue()

Checks the publish queue for abandoned publish jobs.

handleDoomedThreads

protected void handleDoomedThreads()

Handles doomed threads.

persistData

protected void persistData()

Takes care of the persistence of data normally held in memory.

shutDown

protected void shutDown()

Shut down this thread store.

validateSessions

protected void validateSessions()

Checks for invalid sessions.