de.malowa
Class ShutdownHook

java.lang.Object
  java.lang.Thread
      de.malowa.ShutdownHook

All Implemented Interfaces:

java.lang.Runnable

public class ShutdownHook
extends java.lang.Thread

The ShutdownHook will be called when the Postfix service terminates. It ensures that all database connection will be closed. Other classes implementing the interface ShutdownWatcher can be registered. They will be informed of the termination and may also free resources safely.

Author:

Marcel Lohmann

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

ShutdownHook()

Method Summary

void	register(ShutdownWatcher watcher) Registers a class that will be notified when the program shuts down.
void	run() Informs all registered classes of shutdown and shuts down all the databases.

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

ShutdownHook

public ShutdownHook()

Method Detail

run

public void run()

Informs all registered classes of shutdown and shuts down all the databases. After execution the program is unusable and can be terminated safely.

Specified by:

run in interface java.lang.Runnable

Overrides:

run in class java.lang.Thread

register

public void register(ShutdownWatcher watcher)

Registers a class that will be notified when the program shuts down.

Parameters:

watcher - that will be notified