org.apache.rocketmq.srvutil.ShutdownHookThread Maven / Gradle / Ivy
/*
* 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.rocketmq.srvutil;
import org.apache.rocketmq.logging.InternalLogger;
import java.util.concurrent.Callable;
import java.util.concurrent.atomic.AtomicInteger;
/**
* {@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 InternalLogger log;
private final Callable callback;
/**
* 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(InternalLogger log, Callable callback) {
super("ShutdownHook");
this.log = log;
this.callback = callback;
}
/**
* 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);
}
}
}
}