/*
* Copyright (c) 2015, WSO2 Inc. (http://www.wso2.org) All Rights Reserved.
*
* WSO2 Inc. 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.wso2.carbon.databridge.receiver.binary.internal;
import org.wso2.carbon.databridge.commons.utils.DataBridgeThreadFactory;
import java.util.concurrent.LinkedBlockingQueue;
import java.util.concurrent.Semaphore;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicBoolean;
public class BinaryDataReceiverThreadPoolExecutor extends ThreadPoolExecutor {
private final Semaphore semaphore;
private AtomicBoolean isShutdown;
public BinaryDataReceiverThreadPoolExecutor(int poolSize, String threadName) {
super(poolSize, poolSize, 0L, TimeUnit.SECONDS, new LinkedBlockingQueue<Runnable>(),
new DataBridgeThreadFactory(threadName));
semaphore = new Semaphore(poolSize);
isShutdown = new AtomicBoolean(false);
}
@Override
public void execute(final Runnable task) {
boolean acquired = false;
do {
try {
semaphore.acquire();
acquired = true;
} catch (final InterruptedException e) {
// Do nothing
}
} while (!acquired);
if (!isShutdown.get()) {
super.execute(task);
}
}
@Override
protected void afterExecute(final Runnable r, final Throwable t) {
super.afterExecute(r, t);
semaphore.release();
}
public void shutdown() {
isShutdown.set(true);
super.shutdown();
}
}