quartz源码解析（二）

StdScheduler

QuartzScheduler

public void start() throws SchedulerException {

        if (shuttingDown|| closed) {
            throw new SchedulerException(
                    "The Scheduler cannot be restarted after shutdown() has been called.");
        }

        if (initialStart == null) {
            initialStart = new Date();
            this.resources.getJobStore().schedulerStarted();            
            startPlugins();
        }

        schedThread.togglePause(false);

        getLog().info(
                "Scheduler " + resources.getUniqueIdentifier() + " started.");
        
        notifySchedulerListenersStarted();
    }

&nbsp

/**
     * @see org.quartz.spi.JobStore#schedulerStarted()
     */
    public void schedulerStarted() throws SchedulerException {

        if (isClustered()) {
            clusterManagementThread = new ClusterManager();
            if(initializersLoader != null)
                clusterManagementThread.setContextClassLoader(initializersLoader);
            clusterManagementThread.initialize();
        } else {
            try {
                recoverJobs();
            } catch (SchedulerException se) {
                throw new SchedulerConfigException(
                        "Failure occured during job recovery.", se);
            }
        }

        misfireHandler = new MisfireHandler();
        if(initializersLoader != null)
            misfireHandler.setContextClassLoader(initializersLoader);
        misfireHandler.initialize();
    }

ClusterManager

public void run() {
            while (!shutdown) {

                if (!shutdown) {
                    long timeToSleep = getClusterCheckinInterval();
                    long transpiredTime = (System.currentTimeMillis() - lastCheckin);
                    timeToSleep = timeToSleep - transpiredTime;
                    if (timeToSleep <= 0) {
                        timeToSleep = 100L;
                    }

                    if(numFails > 0) {
                        timeToSleep = Math.max(getDbRetryInterval(), timeToSleep);
                    }
                    
                    try {
                        Thread.sleep(timeToSleep);
                    } catch (Exception ignore) {
                    }
                }

                if (!shutdown && this.manage()) {
                    signalSchedulingChangeImmediately(0L);
                }

            }//while !shutdown
        }