tomcat容器启动的启动过程(三)

Catalina的start方法

   /**
     * Start a new server instance.
     */
    public void start() {
 
        if (server == null) {
            load();
        }
 
        long t1 = System.nanoTime();
 
        // Start the new server
        if (server instanceof Lifecycle) {
            try {
                ((Lifecycle) server).start();//启动Server
            } catch (LifecycleException e) {
                log.error("Catalina.start: ", e);
            }
        }
 
        long t2 = System.nanoTime();
        if(log.isInfoEnabled())
            log.info("Server startup in " + ((t2 - t1) / 1000000) + " ms");
 
        try {
            // Register shutdown hook
            if (useShutdownHook) {
                if (shutdownHook == null) {
                    shutdownHook = new CatalinaShutdownHook();
                }
                Runtime.getRuntime().addShutdownHook(shutdownHook);
            }
        } catch (Throwable t) {
            // This will fail on JDK 1.2. Ignoring, as Tomcat can run
            // fine without the shutdown hook.
        }
    //启动完成 等待客户端连接
        if (await) {
            await();
            stop();
        }
 
    }

启动server的时候启动service。

    public void start() throws LifecycleException {
 
        // Validate and update our current component state
        if (started) {
            log.debug(sm.getString("standardServer.start.started"));
            return;
        }
 
        // Notify our interested LifecycleListeners
        lifecycle.fireLifecycleEvent(BEFORE_START_EVENT, null);
 
        lifecycle.fireLifecycleEvent(START_EVENT, null);
        started = true;
 
        // Start our defined Services
        synchronized (services) {
            for (int i = 0; i < services.length; i++) {
                if (services[i] instanceof Lifecycle)
                    ((Lifecycle) services[i]).start();//启动service
            }
        }
 
        // Notify our interested LifecycleListeners
        lifecycle.fireLifecycleEvent(AFTER_START_EVENT, null);
 
    }