mirror of
https://github.com/vanitasvitae/Smack.git
synced 2024-09-26 17:49:33 +02:00
81fb1ed93c
Otherwise AbstractXMPPConnection.processPacket() will throw a RejectedExecutionException if the underlying queue is full. Fixes SMACK-702.
64 lines
2.5 KiB
Java
64 lines
2.5 KiB
Java
/**
|
|
*
|
|
* Copyright 2015 Florian Schmaus
|
|
*
|
|
* 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.jivesoftware.smack.util;
|
|
|
|
import java.util.concurrent.ArrayBlockingQueue;
|
|
import java.util.concurrent.RejectedExecutionException;
|
|
import java.util.concurrent.Semaphore;
|
|
import java.util.concurrent.ThreadFactory;
|
|
import java.util.concurrent.ThreadPoolExecutor;
|
|
import java.util.concurrent.TimeUnit;
|
|
|
|
public class BoundedThreadPoolExecutor extends ThreadPoolExecutor {
|
|
|
|
private final Semaphore semaphore;
|
|
|
|
public BoundedThreadPoolExecutor(int corePoolSize, int maximumPoolSize, long keepAliveTime,
|
|
TimeUnit unit, int bound, ThreadFactory threadFactory) {
|
|
// One could think that the array blocking queue bound should be "bound - 1" because the bound protected by the
|
|
// Semaphore also includes the "slot" in the worker thread executing the Runnable. But using that as bound could
|
|
// actually cause a RejectedExecutionException as the queue could fill up while the worker thread remains
|
|
// unscheduled and is thus not removing any entries.
|
|
super(corePoolSize, maximumPoolSize, keepAliveTime,
|
|
unit, new ArrayBlockingQueue<Runnable>(bound), threadFactory);
|
|
semaphore = new Semaphore(bound);
|
|
}
|
|
|
|
public void executeBlocking(final Runnable command) throws InterruptedException {
|
|
semaphore.acquire();
|
|
try {
|
|
execute(new Runnable() {
|
|
@Override
|
|
public void run() {
|
|
try {
|
|
command.run();
|
|
} finally {
|
|
semaphore.release();
|
|
}
|
|
}
|
|
});
|
|
} catch (Exception e) {
|
|
semaphore.release();
|
|
if (e instanceof RejectedExecutionException) {
|
|
throw (RejectedExecutionException) e;
|
|
} else {
|
|
throw new RuntimeException(e);
|
|
}
|
|
}
|
|
}
|
|
}
|