/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.apache.openejb.concurrencyutilities.ee.impl;
import org.apache.openejb.concurrencyutilities.ee.future.CUScheduleFuture;
import org.apache.openejb.concurrencyutilities.ee.task.CUCallable;
import org.apache.openejb.concurrencyutilities.ee.task.CURunnable;
import org.apache.openejb.concurrencyutilities.ee.task.TriggerCallable;
import org.apache.openejb.concurrencyutilities.ee.task.TriggerRunnable;
import org.apache.openejb.concurrencyutilities.ee.task.TriggerTask;
import javax.enterprise.concurrent.ManagedScheduledExecutorService;
import javax.enterprise.concurrent.ManagedTask;
import javax.enterprise.concurrent.Trigger;
import java.lang.reflect.InvocationHandler;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.lang.reflect.Proxy;
import java.util.Date;
import java.util.concurrent.Callable;
import java.util.concurrent.Future;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.ScheduledFuture;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicReference;
public class ManagedScheduledExecutorServiceImpl extends ManagedExecutorServiceImpl implements ManagedScheduledExecutorService {
private final ScheduledExecutorService delegate;
public ManagedScheduledExecutorServiceImpl(final ScheduledExecutorService delegate) {
super(delegate);
this.delegate = delegate;
}
@Override
public ScheduledFuture<?> schedule(final Runnable runnable, final Trigger trigger) {
final Date taskScheduledTime = new Date();
final AtomicReference<Future<?>> futureHandle = new AtomicReference<Future<?>>();
final TriggerRunnable wrapper = new TriggerRunnable(this, runnable, new CURunnable(runnable), trigger, taskScheduledTime, getTaskId(runnable), AtomicReference.class.cast(futureHandle));
final ScheduledFuture<?> future = delegate.schedule(wrapper, trigger.getNextRunTime(wrapper.getLastExecution(), taskScheduledTime).getTime() - nowMs(), TimeUnit.MILLISECONDS);
return initTriggerScheduledFuture(runnable, AtomicReference.class.cast(futureHandle), wrapper, ScheduledFuture.class.cast(future));
}
@Override
public <V> ScheduledFuture<V> schedule(final Callable<V> vCallable, final Trigger trigger) {
final Date taskScheduledTime = new Date();
final AtomicReference<Future<V>> futureHandle = new AtomicReference<Future<V>>();
final TriggerCallable<V> wrapper = new TriggerCallable<V>(this, vCallable, new CUCallable<V>(vCallable), trigger, taskScheduledTime, getTaskId(vCallable), futureHandle);
final ScheduledFuture<V> future = delegate.schedule(wrapper, trigger.getNextRunTime(wrapper.getLastExecution(), taskScheduledTime).getTime() - nowMs(), TimeUnit.MILLISECONDS);
return initTriggerScheduledFuture(vCallable, futureHandle, wrapper, future);
}
private <V> ScheduledFuture<V> initTriggerScheduledFuture(final Object original, final AtomicReference<Future<V>> futureHandle,
final TriggerTask<V> wrapper, final ScheduledFuture<V> future) {
futureHandle.set(future);
wrapper.taskSubmitted(future, this, original);
return new CUScheduleFuture<V>(ScheduledFutureFacade.<V>newProxy(futureHandle), wrapper);
}
@Override
public ScheduledFuture<?> schedule(final Runnable command, final long delay, final TimeUnit unit) {
final CURunnable wrapper = new CURunnable(command);
final ScheduledFuture<?> future = delegate.schedule(wrapper, delay, unit);
wrapper.taskSubmitted(future, this, command);
return new CUScheduleFuture<Object>(ScheduledFuture.class.cast(future), wrapper);
}
@Override
public <V> ScheduledFuture<V> schedule(final Callable<V> callable, final long delay, final TimeUnit unit) {
final CUCallable<V> wrapper = new CUCallable<V>(callable);
final ScheduledFuture<V> future = delegate.schedule(wrapper, delay, unit);
wrapper.taskSubmitted(future, this, callable);
return new CUScheduleFuture<V>(future, wrapper);
}
@Override
public ScheduledFuture<?> scheduleAtFixedRate(final Runnable command, final long initialDelay, final long period, final TimeUnit unit) {
final CURunnable wrapper = new CURunnable(command);
final ScheduledFuture<?> future = delegate.scheduleAtFixedRate(wrapper, initialDelay, period, unit);
wrapper.taskSubmitted(future, this, command);
return new CUScheduleFuture<Object>(ScheduledFuture.class.cast(future), wrapper);
}
@Override
public ScheduledFuture<?> scheduleWithFixedDelay(final Runnable command, final long initialDelay, final long delay, final TimeUnit unit) {
final CURunnable wrapper = new CURunnable(command);
final ScheduledFuture<?> future = delegate.scheduleWithFixedDelay(wrapper, initialDelay, delay, unit);
wrapper.taskSubmitted(future, this, command);
return new CUScheduleFuture<Object>(ScheduledFuture.class.cast(future), wrapper);
}
public static long nowMs() {
return System.currentTimeMillis(); // need to be comparable to java.util.Date
}
private static String getTaskId(final Object runnable) {
if (ManagedTask.class.isInstance(runnable)) {
return ManagedTask.class.cast(runnable).getExecutionProperties().get(ManagedTask.IDENTITY_NAME);
}
return null;
}
private static class ScheduledFutureFacade<V> implements InvocationHandler {
private final AtomicReference<ScheduledFuture<V>> delegate;
private ScheduledFutureFacade(final AtomicReference<ScheduledFuture<V>> delegate) {
this.delegate = delegate;
}
@Override
public Object invoke(final Object proxy, final Method method, final Object[] args) throws Throwable {
try {
return method.invoke(delegate.get(), args);
} catch (final InvocationTargetException ite) {
throw ite.getCause();
}
}
private static <V> ScheduledFuture<V> newProxy(final AtomicReference<Future<V>> futureHandle) {
return ScheduledFuture.class.cast(Proxy.newProxyInstance(Thread.currentThread().getContextClassLoader(), new Class<?>[]{ScheduledFuture.class}, new ScheduledFutureFacade(futureHandle)));
}
}
}