org.jboss.seam.cron.spi.asynchronous.support
Class FutureInvokerSupport

java.lang.Object
  org.jboss.seam.cron.spi.asynchronous.support.FutureInvokerSupport

All Implemented Interfaces:

Callable

public class FutureInvokerSupport
extends Object
implements Callable

Creates a #Callable whose #call method will block until the #executeInvocationContext() method is called. This comes in handy when returning Futures (eg: #new FutureTask( new FutureInvokerSupport(invoker))).

In the simplest case #executeInvocationContext() could be called in the same thread prior to calling #call(). This is useful when your method of executing in the background is also #Runnable or #Callable and can thus be used to return a #RunnableFuture.

In more complex cases #executeInvocationContext() could be called by a separate thread at any time before or after the current thread calls #call(). This is useful when your method of executing in the background is fairly arbitrary (eg a Quartz Job scheduled for the near future), and you need to be able to return a #new FutureTask(callable) immediately but trigger the processing on that callable some arbitrary way (ie: inside the Quartz Job implementation).

See the Seam Cron Asynchronous Provider projects for the Threads and Quartz providers to see this in action (providers/scheduling/quartz and providers/asynchronous/threads).

Author:

peteroyle

Constructor Summary

FutureInvokerSupport(Invoker executor)

Method Summary

Object	call()
void	executeInvocationContext()

Methods inherited from class java.lang.Object

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

Constructor Detail

FutureInvokerSupport

public FutureInvokerSupport(Invoker executor)

Method Detail

executeInvocationContext

public void executeInvocationContext()
                              throws Exception

Throws:

Exception

call

public Object call()
            throws Exception

Specified by:

call in interface Callable

Throws:

Exception