dubbo 钩子关闭

dubbo钩子关闭，
避免业务丢失

package com.test.task;

import com.alibaba.dubbo.common.Constants;
import com.alibaba.dubbo.common.extension.ExtensionLoader;
import com.alibaba.dubbo.common.utils.ConfigUtils;
import com.alibaba.dubbo.container.Container;
import com.alibaba.dubbo.container.Main;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;

import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Date;
import java.util.List;

public class TaskMain {

    public static final String CONTAINER_KEY = "dubbo.container";
    public static final String SHUTDOWN_HOOK_KEY = "dubbo.shutdown.hook";
    private static final Logger logger = LogManager.getLogger(Main.class);

    private static final ExtensionLoader loader = ExtensionLoader.getExtensionLoader(Container.class);

    private static volatile boolean running = true;

    public static void main(String[] args) {
        try {
            if ((args == null) || (args.length == 0)) {
                String config = ConfigUtils.getProperty("dubbo.container", loader.getDefaultExtensionName());
                args = Constants.COMMA_SPLIT_PATTERN.split(config);
            }

            final List containers = new ArrayList();
            for (int i = 0; i < args.length; i++) {
                containers.add(loader.getExtension(args[i]));
            }
            logger.info("Use container type(" + Arrays.toString(args) + ") to run dubbo serivce.");

            if ("true".equals(System.getProperty("dubbo.shutdown.hook"))) {
                Runtime.getRuntime().addShutdownHook(new Thread() {
                    public void run() {
                        for (Container container : containers) {
                            try {
                                container.stop();
                                logger.info("Dubbo " + container.getClass().getSimpleName() + " stopped!");
                            } catch (Throwable t) {
                                logger.error(t.getMessage(), t);
                            }
                            synchronized (Main.class) {
                                running = false;
                                Main.class.notify();
                            }
                        }
                    }
                });
            }

            for (Container container : containers) {
                container.start();
                logger.info("Dubbo " + container.getClass().getSimpleName() + " started!");
            }
            logger.info(new SimpleDateFormat("[yyyy-MM-dd HH:mm:ss]").format(new Date()) + " Dubbo service server started!");
        } catch (RuntimeException e) {
            logger.error(e.getMessage(), e);
            e.printStackTrace();
            System.exit(1);
        }

        logger.info("============dubbo is starting==============");

        synchronized (Main.class) {
            while (running)
                try {
                    Main.class.wait();
                } catch (Throwable localThrowable) {
                }
        }
    }
}