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[ROCKETMQ-39] avoid duplicated codes closes apache#34
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69 changes: 69 additions & 0 deletions
69
srvutil/src/main/java/org/apache/rocketmq/srvutil/ShutdownHookThread.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,69 @@ | ||
| /* | ||
| * 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. | ||
| */ | ||
|
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| package org.apache.rocketmq.srvutil; | ||
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| import java.util.concurrent.Callable; | ||
| import java.util.concurrent.atomic.AtomicInteger; | ||
| import org.slf4j.Logger; | ||
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| /** | ||
| * {@link ShutdownHookThread} is the standard hook for filtersrv and namesrv modules. | ||
| * Through {@link Callable} interface, this hook can customization operations in anywhere. | ||
| */ | ||
| public class ShutdownHookThread extends Thread { | ||
| private volatile boolean hasShutdown = false; | ||
| private AtomicInteger shutdownTimes = new AtomicInteger(0); | ||
| private final Logger log; | ||
| private final Callable callback; | ||
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|
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| /** | ||
| * Create the standard hook thread, with a call back, by using {@link Callable} interface. | ||
| * | ||
| * @param log The log instance is used in hook thread. | ||
| * @param callback The call back function. | ||
| */ | ||
| public ShutdownHookThread(Logger log, Callable callback) { | ||
| super("ShutdownHook"); | ||
| this.log = log; | ||
| this.callback = callback; | ||
| } | ||
|
|
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| /** | ||
| * Thread run method. | ||
| * Invoke when the jvm shutdown. | ||
| * 1. count the invocation times. | ||
| * 2. execute the {@link ShutdownHookThread#callback}, and time it. | ||
| */ | ||
| @Override | ||
| public void run() { | ||
| synchronized (this) { | ||
| log.info("shutdown hook was invoked, " + this.shutdownTimes.incrementAndGet() + " times."); | ||
| if (!this.hasShutdown) { | ||
| this.hasShutdown = true; | ||
| long beginTime = System.currentTimeMillis(); | ||
| try { | ||
| this.callback.call(); | ||
| } catch (Exception e) { | ||
| log.error("shutdown hook callback invoked failure.", e); | ||
| } | ||
| long consumingTimeTotal = System.currentTimeMillis() - beginTime; | ||
| log.info("shutdown hook done, consuming time total(ms): " + consumingTimeTotal); | ||
| } | ||
| } | ||
| } | ||
| } |