| /* |
| * 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.config; |
| |
| import com.alibaba.dubbo.common.extension.ExtensionLoader; |
| import com.alibaba.dubbo.common.logger.Logger; |
| import com.alibaba.dubbo.common.logger.LoggerFactory; |
| import com.alibaba.dubbo.registry.support.AbstractRegistryFactory; |
| import com.alibaba.dubbo.rpc.Protocol; |
| |
| 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 Logger logger = LoggerFactory.getLogger(DubboShutdownHook.class); |
| |
| private static final DubboShutdownHook dubboShutdownHook = new DubboShutdownHook("DubboShutdownHook"); |
| |
| public static DubboShutdownHook getDubboShutdownHook() { |
| return dubboShutdownHook; |
| } |
| |
| /** |
| * Has it already been destroyed or not? |
| */ |
| private final AtomicBoolean destroyed; |
| |
| private DubboShutdownHook(String name) { |
| super(name); |
| this.destroyed = new AtomicBoolean(false); |
| } |
| |
| @Override |
| public void run() { |
| if (logger.isInfoEnabled()) { |
| logger.info("Run shutdown hook now."); |
| } |
| destroyAll(); |
| } |
| |
| /** |
| * Destroy all the resources, including registries and protocols. |
| */ |
| public void destroyAll() { |
| if (!destroyed.compareAndSet(false, true)) { |
| return; |
| } |
| // destroy all the registries |
| AbstractRegistryFactory.destroyAll(); |
| // destroy all the protocols |
| ExtensionLoader<Protocol> loader = ExtensionLoader.getExtensionLoader(Protocol.class); |
| for (String protocolName : loader.getLoadedExtensions()) { |
| try { |
| Protocol protocol = loader.getLoadedExtension(protocolName); |
| if (protocol != null) { |
| protocol.destroy(); |
| } |
| } catch (Throwable t) { |
| logger.warn(t.getMessage(), t); |
| } |
| } |
| } |
| |
| |
| } |