| /* |
| * 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.dubbo.common.utils; |
| |
| import org.apache.dubbo.common.URL; |
| import org.apache.dubbo.common.logger.Logger; |
| import org.apache.dubbo.common.logger.LoggerFactory; |
| |
| import java.util.concurrent.Executor; |
| import java.util.concurrent.ExecutorService; |
| import java.util.concurrent.LinkedBlockingQueue; |
| import java.util.concurrent.ScheduledFuture; |
| import java.util.concurrent.ThreadPoolExecutor; |
| import java.util.concurrent.TimeUnit; |
| |
| import static org.apache.dubbo.common.constants.CommonConstants.THREAD_NAME_KEY; |
| |
| public class ExecutorUtil { |
| private static final Logger logger = LoggerFactory.getLogger(ExecutorUtil.class); |
| private static final ThreadPoolExecutor SHUTDOWN_EXECUTOR = new ThreadPoolExecutor(0, 1, |
| 0L, TimeUnit.MILLISECONDS, |
| new LinkedBlockingQueue<Runnable>(100), |
| new NamedThreadFactory("Close-ExecutorService-Timer", true)); |
| |
| public static boolean isTerminated(Executor executor) { |
| if (executor instanceof ExecutorService) { |
| if (((ExecutorService) executor).isTerminated()) { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| /** |
| * Use the shutdown pattern from: |
| * https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/ExecutorService.html |
| * |
| * @param executor the Executor to shutdown |
| * @param timeout the timeout in milliseconds before termination |
| */ |
| public static void gracefulShutdown(Executor executor, int timeout) { |
| if (!(executor instanceof ExecutorService) || isTerminated(executor)) { |
| return; |
| } |
| final ExecutorService es = (ExecutorService) executor; |
| try { |
| // Disable new tasks from being submitted |
| es.shutdown(); |
| } catch (SecurityException ex2) { |
| return; |
| } catch (NullPointerException ex2) { |
| return; |
| } |
| try { |
| // Wait a while for existing tasks to terminate |
| if (!es.awaitTermination(timeout, TimeUnit.MILLISECONDS)) { |
| es.shutdownNow(); |
| } |
| } catch (InterruptedException ex) { |
| es.shutdownNow(); |
| Thread.currentThread().interrupt(); |
| } |
| if (!isTerminated(es)) { |
| newThreadToCloseExecutor(es); |
| } |
| } |
| |
| public static void shutdownNow(Executor executor, final int timeout) { |
| if (!(executor instanceof ExecutorService) || isTerminated(executor)) { |
| return; |
| } |
| final ExecutorService es = (ExecutorService) executor; |
| try { |
| es.shutdownNow(); |
| } catch (SecurityException ex2) { |
| return; |
| } catch (NullPointerException ex2) { |
| return; |
| } |
| try { |
| es.awaitTermination(timeout, TimeUnit.MILLISECONDS); |
| } catch (InterruptedException ex) { |
| Thread.currentThread().interrupt(); |
| } |
| if (!isTerminated(es)) { |
| newThreadToCloseExecutor(es); |
| } |
| } |
| |
| private static void newThreadToCloseExecutor(final ExecutorService es) { |
| if (!isTerminated(es)) { |
| SHUTDOWN_EXECUTOR.execute(new Runnable() { |
| @Override |
| public void run() { |
| try { |
| for (int i = 0; i < 1000; i++) { |
| es.shutdownNow(); |
| if (es.awaitTermination(10, TimeUnit.MILLISECONDS)) { |
| break; |
| } |
| } |
| } catch (InterruptedException ex) { |
| Thread.currentThread().interrupt(); |
| } catch (Throwable e) { |
| logger.warn(e.getMessage(), e); |
| } |
| } |
| }); |
| } |
| } |
| |
| /** |
| * append thread name with url address |
| * |
| * @return new url with updated thread name |
| */ |
| public static URL setThreadName(URL url, String defaultName) { |
| String name = url.getParameter(THREAD_NAME_KEY, defaultName); |
| name = name + "-" + url.getAddress(); |
| url = url.addParameter(THREAD_NAME_KEY, name); |
| return url; |
| } |
| |
| public static void cancelScheduledFuture(ScheduledFuture<?> scheduledFuture) { |
| ScheduledFuture<?> future = scheduledFuture; |
| if (future != null && !future.isCancelled()) { |
| future.cancel(true); |
| } |
| } |
| } |