/*
* JBoss, Home of Professional Open Source
* Copyright 2012, Red Hat, Inc., and individual contributors
* by the @authors tag. See the copyright.txt in the distribution for a
* full listing of individual contributors.
*
* 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 org.jboss.weld.executor;
import java.util.Collection;
import java.util.List;
import java.util.concurrent.Callable;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.Future;
import java.util.concurrent.TimeUnit;
import org.jboss.weld.exceptions.DeploymentException;
import org.jboss.weld.logging.BootstrapLogger;
import org.jboss.weld.manager.api.ExecutorServices;
/**
* Common functionality for {@link ExecutorServices}.
*
* @author Jozef Hartinger
*
*/
public abstract class AbstractExecutorServices implements ExecutorServices {
private static final long SHUTDOWN_TIMEOUT = 60L;
@Override
public <T> List<Future<T>> invokeAllAndCheckForExceptions(Collection<? extends Callable<T>> tasks) {
try {
return checkForExceptions(getTaskExecutor().invokeAll(tasks));
} catch (InterruptedException e) {
Thread.currentThread().interrupt();
throw new DeploymentException(e);
}
}
public <T> List<Future<T>> invokeAllAndCheckForExceptions(TaskFactory<T> factory) {
return invokeAllAndCheckForExceptions(factory.createTasks(getThreadPoolSize()));
}
protected <T> List<Future<T>> checkForExceptions(List<Future<T>> futures) {
for (Future<T> result : futures) {
try {
result.get();
} catch (InterruptedException e) {
Thread.currentThread().interrupt();
throw new DeploymentException(e);
} catch (ExecutionException e) {
Throwable cause = e.getCause();
if (cause instanceof RuntimeException) {
throw RuntimeException.class.cast(cause);
} else {
throw new DeploymentException(cause);
}
}
}
return futures;
}
public void cleanup() {
getTaskExecutor().shutdown();
try {
// Wait a while for existing tasks to terminate
if (!getTaskExecutor().awaitTermination(SHUTDOWN_TIMEOUT, TimeUnit.SECONDS)) {
getTaskExecutor().shutdownNow(); // Cancel currently executing tasks
// Wait a while for tasks to respond to being cancelled
if (!getTaskExecutor().awaitTermination(SHUTDOWN_TIMEOUT, TimeUnit.SECONDS)) {
// Log the error here
BootstrapLogger.LOG.timeoutShuttingDownThreadPool(getTaskExecutor(), this);
// log.warn(BootstrapMessage.TIMEOUT_SHUTTING_DOWN_THREAD_POOL, getTaskExecutor(), this);
}
}
} catch (InterruptedException ie) {
// (Re-)Cancel if current thread also interrupted
getTaskExecutor().shutdownNow();
// Preserve interrupt status
Thread.currentThread().interrupt();
}
}
protected abstract int getThreadPoolSize();
}