Quartz与Spring集成—— SchedulerFactoryBean的初始化分析「建议收藏」

    <bean id="schedulerFactoryBean" class="org.springframework.scheduling.quartz.SchedulerFactoryBean">
        <property name="dataSource" ref="dataSource"/>
        <property name="overwriteExistingJobs" value="true"/>
        <property name="configLocation" value="classpath:quartz.properties"/>
    </bean>

public class SchedulerFactoryBean extends SchedulerAccessor implements FactoryBean<Scheduler>, BeanNameAware,
		ApplicationContextAware, InitializingBean, DisposableBean, SmartLifecycle {

		// Create SchedulerFactory instance...
		SchedulerFactory schedulerFactory = BeanUtils.instantiateClass(this.schedulerFactoryClass);
		initSchedulerFactory(schedulerFactory);

	private void initSchedulerFactory(SchedulerFactory schedulerFactory) throws SchedulerException, IOException {
		if (!(schedulerFactory instanceof StdSchedulerFactory)) {
			if (this.configLocation != null || this.quartzProperties != null ||
					this.taskExecutor != null || this.dataSource != null) {
				throw new IllegalArgumentException(
						"StdSchedulerFactory required for applying Quartz properties: " + schedulerFactory);
			}
			// Otherwise assume that no initialization is necessary...
			return;
		}

		Properties mergedProps = new Properties();

		if (this.resourceLoader != null) {
			mergedProps.setProperty(StdSchedulerFactory.PROP_SCHED_CLASS_LOAD_HELPER_CLASS,
					ResourceLoaderClassLoadHelper.class.getName());
		}

		if (this.taskExecutor != null) {
			mergedProps.setProperty(StdSchedulerFactory.PROP_THREAD_POOL_CLASS,
					LocalTaskExecutorThreadPool.class.getName());
		}
		else {
			// Set necessary default properties here, as Quartz will not apply
			// its default configuration when explicitly given properties.
			mergedProps.setProperty(StdSchedulerFactory.PROP_THREAD_POOL_CLASS, SimpleThreadPool.class.getName());
			mergedProps.setProperty(PROP_THREAD_COUNT, Integer.toString(DEFAULT_THREAD_COUNT));
		}

		if (this.configLocation != null) {
			if (logger.isInfoEnabled()) {
				logger.info("Loading Quartz config from [" + this.configLocation + "]");
			}
			PropertiesLoaderUtils.fillProperties(mergedProps, this.configLocation);
		}

		CollectionUtils.mergePropertiesIntoMap(this.quartzProperties, mergedProps);

		if (this.dataSource != null) {
			mergedProps.put(StdSchedulerFactory.PROP_JOB_STORE_CLASS, LocalDataSourceJobStore.class.getName());
		}

		// Make sure to set the scheduler name as configured in the Spring configuration.
		if (this.schedulerName != null) {
			mergedProps.put(StdSchedulerFactory.PROP_SCHED_INSTANCE_NAME, this.schedulerName);
		}

		((StdSchedulerFactory) schedulerFactory).initialize(mergedProps);
	}

    public void initialize(Properties props) throws SchedulerException {        if (propSrc == null) {            propSrc = "an externally provided properties instance.";        }        this.cfg = new PropertiesParser(props);    }

	this.scheduler = createScheduler(schedulerFactory, this.schedulerName);
	populateSchedulerContext();

	if (!this.jobFactorySet && !(this.scheduler instanceof RemoteScheduler)) {
		// Use AdaptableJobFactory as default for a local Scheduler, unless when
		// explicitly given a null value through the "jobFactory" bean property.
		this.jobFactory = new AdaptableJobFactory();
	}
	if (this.jobFactory != null) {
		if (this.jobFactory instanceof SchedulerContextAware) {
			((SchedulerContextAware) this.jobFactory).setSchedulerContext(this.scheduler.getContext());
		}
		this.scheduler.setJobFactory(this.jobFactory);
	}
 	//省略次要代码
	registerListeners();
	registerJobsAndTriggers();

	protected void registerListeners() throws SchedulerException {
		ListenerManager listenerManager = getScheduler().getListenerManager();
		if (this.schedulerListeners != null) {
			for (SchedulerListener listener : this.schedulerListeners) {
				listenerManager.addSchedulerListener(listener);
			}
		}
		if (this.globalJobListeners != null) {
			for (JobListener listener : this.globalJobListeners) {
				listenerManager.addJobListener(listener);
			}
		}
		if (this.globalTriggerListeners != null) {
			for (TriggerListener listener : this.globalTriggerListeners) {
				listenerManager.addTriggerListener(listener);
			}
		}
	}