org.melati.poem
Class PoemDatabaseFactory.PoemShutdownThread

java.lang.Object
  java.lang.Thread
      org.melati.poem.PoemDatabaseFactory.PoemShutdownThread

All Implemented Interfaces:

java.lang.Runnable

Enclosing class:

PoemDatabaseFactory

public static class PoemDatabaseFactory.PoemShutdownThread
extends java.lang.Thread

Shutdown databases cleanly when JVM exits. This method is called in one of two ways: when the jvm exits or when a ServletContext is detroyed. Jetty, and presumably other servlet containers, registers its listeners as shutdown hooks too, so there is no way of determining which is to be executed first. If PoemDatabaseFactory has not been initialised before the ContextListener is activated then this thread will be created but will fail to register. It will then be run by the ContextListener. It may well be that the registered thread will be run before the ContextListener thread, or visa versa, so there is a synchronised variable to ensure it actually does something only the first time.

Since:

23 May 2007

Author:

timp

See Also:

org.melati.servlet.PoemServletContextListener

Nested Class Summary

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

java.lang.Thread.State, java.lang.Thread.UncaughtExceptionHandler

Field Summary

Fields inherited from class java.lang.Thread

MAX_PRIORITY, MIN_PRIORITY, NORM_PRIORITY

Constructor Summary

PoemDatabaseFactory.PoemShutdownThread()
Constructor.

Method Summary

void

run()

Methods inherited from class java.lang.Thread

activeCount, checkAccess, 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

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

Constructor Detail

PoemDatabaseFactory.PoemShutdownThread

public PoemDatabaseFactory.PoemShutdownThread()

Constructor.

Method Detail

run

public void run()

Specified by:

run in interface java.lang.Runnable

Overrides:

run in class java.lang.Thread

See Also:

Thread.run()