| /* |
| * 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.config; |
| |
| import org.apache.dubbo.common.config.ConfigurationUtils; |
| import org.apache.dubbo.common.constants.CommonConstants; |
| import org.apache.dubbo.common.logger.ErrorTypeAwareLogger; |
| import org.apache.dubbo.common.logger.LoggerFactory; |
| import org.apache.dubbo.common.utils.Assert; |
| import org.apache.dubbo.rpc.model.ApplicationModel; |
| |
| import java.util.concurrent.atomic.AtomicBoolean; |
| |
| /** |
| * The shutdown hook thread to do the clean up stuff. |
| * This is a singleton in order to ensure there is only one shutdown hook registered. |
| * Because {@link ApplicationShutdownHooks} use {@link java.util.IdentityHashMap} |
| * to store the shutdown hooks. |
| */ |
| public class DubboShutdownHook extends Thread { |
| |
| private static final ErrorTypeAwareLogger logger = LoggerFactory.getErrorTypeAwareLogger(DubboShutdownHook.class); |
| |
| private final ApplicationModel applicationModel; |
| |
| /** |
| * Has it already been registered or not? |
| */ |
| private final AtomicBoolean registered = new AtomicBoolean(false); |
| |
| /** |
| * Has it already been destroyed or not? |
| */ |
| private final AtomicBoolean destroyed = new AtomicBoolean(false); |
| |
| /** |
| * Whether ignore listen on shutdown hook? |
| */ |
| private final boolean ignoreListenShutdownHook; |
| |
| public DubboShutdownHook(ApplicationModel applicationModel) { |
| super("DubboShutdownHook"); |
| this.applicationModel = applicationModel; |
| Assert.notNull(this.applicationModel, "ApplicationModel is null"); |
| ignoreListenShutdownHook = Boolean.parseBoolean(ConfigurationUtils.getProperty(applicationModel, CommonConstants.IGNORE_LISTEN_SHUTDOWN_HOOK)); |
| if (ignoreListenShutdownHook) { |
| logger.info("dubbo.shutdownHook.listenIgnore configured, will ignore add shutdown hook to jvm."); |
| } |
| } |
| |
| @Override |
| public void run() { |
| |
| if (destroyed.compareAndSet(false, true) && !ignoreListenShutdownHook) { |
| if (logger.isInfoEnabled()) { |
| logger.info("Run shutdown hook now."); |
| } |
| |
| doDestroy(); |
| } |
| } |
| |
| private void doDestroy() { |
| applicationModel.destroy(); |
| } |
| |
| /** |
| * Register the ShutdownHook |
| */ |
| public void register() { |
| if (registered.compareAndSet(false, true) && !ignoreListenShutdownHook) { |
| try { |
| Runtime.getRuntime().addShutdownHook(this); |
| } catch (IllegalStateException e) { |
| logger.warn("5-2", "", "", "register shutdown hook failed: " + e.getMessage(), e); |
| } catch (Exception e) { |
| logger.warn("5-2", "", "", "register shutdown hook failed: " + e.getMessage(), e); |
| } |
| } |
| } |
| |
| /** |
| * Unregister the ShutdownHook |
| */ |
| public void unregister() { |
| if (registered.compareAndSet(true, false) && !ignoreListenShutdownHook) { |
| if (this.isAlive()) { |
| // DubboShutdownHook thread is running |
| return; |
| } |
| try { |
| Runtime.getRuntime().removeShutdownHook(this); |
| } catch (IllegalStateException e) { |
| logger.warn("5-2", "", "", "unregister shutdown hook failed: " + e.getMessage(), e); |
| } catch (Exception e) { |
| logger.warn("5-2", "", "", "unregister shutdown hook failed: " + e.getMessage(), e); |
| } |
| } |
| } |
| |
| public boolean getRegistered() { |
| return registered.get(); |
| } |
| |
| } |