org.directwebremoting.impl
Class AutoShutdownScheduledThreadPoolExecutor

java.lang.Object
  java.util.concurrent.AbstractExecutorService
      java.util.concurrent.ThreadPoolExecutor
          java.util.concurrent.ScheduledThreadPoolExecutor
              org.directwebremoting.impl.AutoShutdownScheduledThreadPoolExecutor

All Implemented Interfaces:

java.util.concurrent.Executor, java.util.concurrent.ExecutorService, java.util.concurrent.ScheduledExecutorService, UninitializingBean

public class AutoShutdownScheduledThreadPoolExecutor
extends java.util.concurrent.ScheduledThreadPoolExecutor
implements UninitializingBean

Just a standard ScheduledThreadPoolExecutor with a single default thread in the pool (we're not doing heavy scheduling) that is also a ServletContextListener so the Container can shut us down.

Author:

Joe Walker [joe at getahead dot ltd dot uk]

Nested Class Summary

Nested classes/interfaces inherited from class java.util.concurrent.ThreadPoolExecutor

java.util.concurrent.ThreadPoolExecutor.AbortPolicy, java.util.concurrent.ThreadPoolExecutor.CallerRunsPolicy, java.util.concurrent.ThreadPoolExecutor.DiscardOldestPolicy, java.util.concurrent.ThreadPoolExecutor.DiscardPolicy

Constructor Summary

AutoShutdownScheduledThreadPoolExecutor()
This is generally used as an event timer, so we don't need more than one thread running at a time.

Method Summary

void	contextDestroyed() Called when a ServletContext is being destroyed.
void	servletDestroyed() Called when GenericServlet.destroy() is called.

Methods inherited from class java.util.concurrent.ScheduledThreadPoolExecutor

execute, getContinueExistingPeriodicTasksAfterShutdownPolicy, getExecuteExistingDelayedTasksAfterShutdownPolicy, getQueue, remove, schedule, schedule, scheduleAtFixedRate, scheduleWithFixedDelay, setContinueExistingPeriodicTasksAfterShutdownPolicy, setExecuteExistingDelayedTasksAfterShutdownPolicy, shutdown, shutdownNow, submit, submit, submit

Methods inherited from class java.util.concurrent.ThreadPoolExecutor

allowCoreThreadTimeOut, allowsCoreThreadTimeOut, awaitTermination, getActiveCount, getCompletedTaskCount, getCorePoolSize, getKeepAliveTime, getLargestPoolSize, getMaximumPoolSize, getPoolSize, getRejectedExecutionHandler, getTaskCount, getThreadFactory, isShutdown, isTerminated, isTerminating, prestartAllCoreThreads, prestartCoreThread, purge, setCorePoolSize, setKeepAliveTime, setMaximumPoolSize, setRejectedExecutionHandler, setThreadFactory

Methods inherited from class java.util.concurrent.AbstractExecutorService

invokeAll, invokeAll, invokeAny, invokeAny

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.concurrent.ExecutorService

awaitTermination, invokeAll, invokeAll, invokeAny, invokeAny, isShutdown, isTerminated

Constructor Detail

AutoShutdownScheduledThreadPoolExecutor

public AutoShutdownScheduledThreadPoolExecutor()

This is generally used as an event timer, so we don't need more than one thread running at a time.

Method Detail

contextDestroyed

public void contextDestroyed()

Description copied from interface: UninitializingBean

Called when a ServletContext is being destroyed. DWR finds out about this destruction if (and only if) in web.xml there is a DwrListener registered. This happens before the GenericServlet.destroy() is called.

If DwrListener is not registered, this will not happen

This method should only be used when we need to take action to enable the servlet to stop cleanly. Typically this will be restricted to stopping reverse ajax threads.

Specified by:

contextDestroyed in interface UninitializingBean

servletDestroyed

public void servletDestroyed()

Description copied from interface: UninitializingBean

Called when GenericServlet.destroy() is called. This event is the preferred time to close resources that don't require all connections to be closed. The servletDestroy method is far more likely to be called.

Specified by:

servletDestroyed in interface UninitializingBean