dubbo服务启动过程

public class Main {

    public static final String CONTAINER_KEY = "dubbo.container";

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

    private static final ExtensionLoader<Container> 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(CONTAINER_KEY, loader.getDefaultExtensionName());
                args = Constants.COMMA_SPLIT_PATTERN.split(config);
            }
            
            final List<Container> containers = new ArrayList<Container>();
            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(SHUTDOWN_HOOK_KEY))) {
	            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!");
            }
            System.out.println(new SimpleDateFormat("[yyyy-MM-dd HH:mm:ss]").format(new Date()) + " Dubbo service server started!");
        } catch (RuntimeException e) {
            e.printStackTrace();
            logger.error(e.getMessage(), e);
            System.exit(1);
        }
        synchronized (Main.class) {
            while (running) {
                try {
                    Main.class.wait();
                } catch (Throwable e) {
                }
            }
        }
    }
    
}

1.加载配置文件里面配置的container。
2.声明钩子方法，系统关闭时，关闭各个container。
3.启动各个container。
4.主函数在Main.class上等待。