adapter/runtime/src/main/java/org/apache/rocketmq/eventbridge/adapter/runtime/common/ServiceThread.java

/*
 * 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.eventbridge.adapter.runtime.common;

import org.apache.rocketmq.eventbridge.adapter.runtime.boot.hook.AbstractStartAndShutdown;
import org.apache.rocketmq.common.CountDownLatch2;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicBoolean;

public abstract class ServiceThread extends AbstractStartAndShutdown implements Runnable {

    private static final Logger LOGGER = LoggerFactory.getLogger(LoggerName.EVENT_BRIDGE_RUNTIMER);

    private static final long JOIN_TIME = 90 * 1000;

    protected final Thread thread;
    protected final CountDownLatch2 waitPoint = new CountDownLatch2(1);
    protected volatile AtomicBoolean hasNotified = new AtomicBoolean(false);
    protected volatile boolean stopped = false;
    protected boolean isDaemon = false;


    public ServiceThread() {
        this.thread = new Thread(this, this.getServiceName());
    }

    public abstract String getServiceName();

    public void start() {
        LOGGER.info("Try to start service thread:{} started:{} lastThread:{}", getServiceName(), hasNotified.get(), thread);
        if (!hasNotified.compareAndSet(false, true)) {
            return;
        }
        stopped = false;
        this.thread.setDaemon(isDaemon);
        this.thread.start();
        LOGGER.info("Start service thread:{} started:{} lastThread:{}", getServiceName(), hasNotified.get(), thread);
    }

    public void shutdown() {
        this.shutdown(false);
    }

    public void shutdown(final boolean interrupt) {
        this.stopped = true;
        LOGGER.info("shutdown thread " + this.getServiceName() + " interrupt " + interrupt);

        if (hasNotified.compareAndSet(false, true)) {
            waitPoint.countDown(); // notify
        }

        try {
            if (interrupt) {
                this.thread.interrupt();
            }

            long beginTime = System.currentTimeMillis();
            if (!this.thread.isDaemon()) {
                this.thread.join(this.getJointime());
            }
            long eclipseTime = System.currentTimeMillis() - beginTime;
            LOGGER.info("join thread " + this.getServiceName() + " eclipse time(ms) " + eclipseTime + " "
                + this.getJointime());
        } catch (InterruptedException e) {
            LOGGER.error("Interrupted", e);
        }
    }

    public long getJointime() {
        return JOIN_TIME;
    }

    public void stop() {
        this.stop(false);
    }

    public void stop(final boolean interrupt) {
        this.stopped = true;
        LOGGER.info("stop thread " + this.getServiceName() + " interrupt " + interrupt);

        if (hasNotified.compareAndSet(false, true)) {
            waitPoint.countDown(); // notify
        }

        if (interrupt) {
            this.thread.interrupt();
        }
    }

    public void makeStop() {
        this.stopped = true;
        LOGGER.info("makestop thread " + this.getServiceName());
    }

    public void wakeup() {
        if (hasNotified.compareAndSet(false, true)) {
            waitPoint.countDown(); // notify
        }
    }

    protected void waitForRunning(long interval) {
        if (hasNotified.compareAndSet(true, false)) {
            this.onWaitEnd();
            return;
        }

        //entry to wait
        waitPoint.reset();

        try {
            waitPoint.await(interval, TimeUnit.MILLISECONDS);
        } catch (InterruptedException e) {
        } finally {
            hasNotified.set(false);
            this.onWaitEnd();
        }
    }

    protected void onWaitEnd() {
    }

    public boolean isStopped() {
        return stopped;
    }
}