bitronix.tm.twopc.executor.AsyncExecutor Maven / Gradle / Ivy
/*
* Copyright (C) 2006-2013 Bitronix Software (http://www.bitronix.be)
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package bitronix.tm.twopc.executor;
import bitronix.tm.internal.BitronixRuntimeException;
import java.util.concurrent.*;
import java.util.logging.Level;
/**
* This implementation executes submitted jobs using a java.util.concurrent cached thread pool.
*
* @author Ludovic Orban
*/
public class AsyncExecutor
implements Executor
{
private static final java.util.logging.Logger log = java.util.logging.Logger.getLogger(AsyncExecutor.class.toString());
private final ExecutorService executorService;
/**
* Constructor AsyncExecutor creates a new AsyncExecutor instance.
*/
public AsyncExecutor()
{
executorService = Executors.newCachedThreadPool();
}
/**
* Submit a job to be executed by the thread pool.
*
* @param job
* the {@link Runnable} to execute.
*
* @return an object used to monitor the execution of the submitted {@link Runnable}.
*/
@Override
public Object submit(Job job)
{
return executorService.submit(job);
}
/**
* Wait for the job represented by the future to terminate. The call to this method will block until the job
* finished its execution or the specified timeout elapsed.
*
* @param future
* the future representing the job as returned by {@link #submit}.
* @param timeout
* if the job did not finish during the specified timeout in milliseconds, this method returns anyway.
*/
@Override
public void waitFor(Object future, long timeout)
{
Future f = (Future) future;
try
{
f.get(timeout, TimeUnit.MILLISECONDS);
}
catch (InterruptedException ex)
{
throw new BitronixRuntimeException("job interrupted", ex);
}
catch (ExecutionException ex)
{
throw new BitronixRuntimeException("job execution exception", ex);
}
catch (TimeoutException ex)
{
// ok, just return
log.log(Level.FINEST, "Just Return", ex);
}
}
/**
* Check if the thread pool has terminated the execution of the job represented by a future.
*
* @param future
* the future representing the job as returned by {@link #submit}.
*
* @return true if the job is done, false otherwise.
*/
@Override
public boolean isDone(Object future)
{
Future f = (Future) future;
return f.isDone();
}
/**
* Shutdown the thead pool.
*/
@Override
public void shutdown()
{
executorService.shutdownNow();
}
}