beiwei30 commented on a change in pull request #1568: Extension: Enhanced Thread Pool URL: https://github.com/apache/incubator-dubbo/pull/1568#discussion_r179999431
########## File path: dubbo-common/src/main/java/com/alibaba/dubbo/common/threadpool/support/enhanced/EnhancedTaskQueue.java ########## @@ -0,0 +1,73 @@ +/* + * 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.enhanced; + +import java.util.concurrent.LinkedBlockingQueue; +import java.util.concurrent.RejectedExecutionException; + +/** + * enhanced task queue in the enhanced thread pool + */ +public class EnhancedTaskQueue<R extends Runnable> extends LinkedBlockingQueue<Runnable> { + + private static final long serialVersionUID = -2635853580887179627L; + + private EnhancedThreadPoolExecutor executor; + + public EnhancedTaskQueue(int capacity) { + super(capacity); + } + + public void setExecutor(EnhancedThreadPoolExecutor exec) { + executor = exec; + } + + @Override + public boolean offer(Runnable runnable) { + if (executor == null) { + throw new RejectedExecutionException("enhanced queue does not have executor !"); + } + int currentPoolThreadSize = executor.getPoolSize(); + //have free worker. put task into queue to let the worker deal with task. + if (executor.getSubmittedTaskCount() < currentPoolThreadSize) { + return super.offer(runnable); + } + + // return false to let executor create new worker. + if (currentPoolThreadSize < executor.getMaximumPoolSize()) { + return false; + } + + //currentPoolThreadSize >= max + return super.offer(runnable); + } + + /** + * retry offer task + * + * @param o task + * @return offer success or not + * @throws RejectedExecutionException if executor is terminated. + */ + public boolean retryOffer(Runnable o) { + if (executor.isShutdown()) { + throw new RejectedExecutionException("Executor is shutdown !"); Review comment: change "Executor is shutdown !" to "Executor is shutdown!", there's one extra space. ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org With regards, Apache Git Services