/* | |
* 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 com.alibaba.dubbo.common.threadpool.support.fixed; | |
import com.alibaba.dubbo.common.Constants; | |
import com.alibaba.dubbo.common.URL; | |
import com.alibaba.dubbo.common.threadlocal.NamedInternalThreadFactory; | |
import com.alibaba.dubbo.common.threadpool.ThreadPool; | |
import com.alibaba.dubbo.common.threadpool.support.AbortPolicyWithReport; | |
import java.util.concurrent.Executor; | |
import java.util.concurrent.LinkedBlockingQueue; | |
import java.util.concurrent.SynchronousQueue; | |
import java.util.concurrent.ThreadPoolExecutor; | |
import java.util.concurrent.TimeUnit; | |
/** | |
* Creates a thread pool that reuses a fixed number of threads | |
* | |
* @see java.util.concurrent.Executors#newFixedThreadPool(int) | |
*/ | |
public class FixedThreadPool implements ThreadPool { | |
@Override | |
public Executor getExecutor(URL url) { | |
String name = url.getParameter(Constants.THREAD_NAME_KEY, Constants.DEFAULT_THREAD_NAME); | |
int threads = url.getParameter(Constants.THREADS_KEY, Constants.DEFAULT_THREADS); | |
int queues = url.getParameter(Constants.QUEUES_KEY, Constants.DEFAULT_QUEUES); | |
return new ThreadPoolExecutor(threads, threads, 0, TimeUnit.MILLISECONDS, | |
queues == 0 ? new SynchronousQueue<Runnable>() : | |
(queues < 0 ? new LinkedBlockingQueue<Runnable>() | |
: new LinkedBlockingQueue<Runnable>(queues)), | |
new NamedInternalThreadFactory(name, true), new AbortPolicyWithReport(name, url)); | |
} | |
} |