示例10 - 使用Quartz插件

说明

此示例演示XML作业初始化插件以及历史记录插件的使用。

SimpleJob.java源码

package org.quartz.examples.example10;

import java.util.Date;
import java.util.Set;
import org.quartz.Job;
import org.quartz.JobExecutionContext;
import org.quartz.JobExecutionException;
import org.quartz.JobKey;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * 这只是被例1执行过许多次的简单作业（只改了一下输出信息）
 * 作者：Bill Kratzer
 */
public class SimpleJob implements Job {

    private static Logger _log = LoggerFactory.getLogger(SimpleJob.class);

    /**
     * 作业初始化的空参构造函数
     */
    public SimpleJob() {
    }

    /**
     * 当与此作业相关联的触发器触发时，由调度器调用此方法
     * Throws：作业执行异常（JobExecutionException）-当执行作业时产生异常
     */
    @SuppressWarnings("unchecked")
    public void execute(JobExecutionContext context)
        throws JobExecutionException {

        //此作业简单地输出它的名称及运行时间
        JobKey jobKey = context.getJobDetail().getKey();
        _log.info("Executing job: " + jobKey + " executing at " + new Date() + ", fired by: " + context.getTrigger().getKey());
        
        if(context.getMergedJobDataMap().size() > 0) {
            Set<String> keys = context.getMergedJobDataMap().keySet();
            for(String key: keys) {
                String val = context.getMergedJobDataMap().getString(key);
                _log.info(" - jobDataMap entry: " + key + " = " + val);
            }
        }
        
        context.setResult("hello");
    }

}

PlugInExample.java源码

package org.quartz.examples.example10;

import org.quartz.Scheduler;
import org.quartz.SchedulerException;
import org.quartz.SchedulerFactory;
import org.quartz.SchedulerMetaData;
import org.quartz.impl.StdSchedulerFactory;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * 此示例将产生大量要运行的作业
 * 作者：James House, Bill Kratzer
 */
public class PlugInExample {

  public void run() throws Exception {
    Logger log = LoggerFactory.getLogger(PlugInExample.class);

    //首先，我们必须获得对调度器的引用
    SchedulerFactory sf = new StdSchedulerFactory();
    Scheduler sched = null;
    try {
      sched = sf.getScheduler();
    } catch (NoClassDefFoundError e) {
      log.error(" Unable to load a class - most likely you do not have jta.jar on the classpath. If not present in the examples/lib folder, please " +
                "add it there for this sample to run.", e);
      return;
    }

    log.info("------- Initialization Complete -----------");

    log.info("------- (Not Scheduling any Jobs - relying on XML definitions --");

    log.info("------- Starting Scheduler ----------------");

    //开启调度器
    sched.start();

    log.info("------- Started Scheduler -----------------");

    log.info("------- Waiting five minutes... -----------");

    //等待5分钟让我们的作业有机会执行
    try {
      Thread.sleep(300L * 1000L);
    } catch (Exception e) {
      //
    }

    //关闭调度器
    log.info("------- Shutting Down ---------------------");
    sched.shutdown(true);
    log.info("------- Shutdown Complete -----------------");

    SchedulerMetaData metaData = sched.getMetaData();
    log.info("Executed " + metaData.getNumberOfJobsExecuted() + " jobs.");
  }

  public static void main(String[] args) throws Exception {

    PlugInExample example = new PlugInExample();
    example.run();
  }

}

控制台输出

[main] INFO org.quartz.impl.StdSchedulerFactory - Using default implementation for ThreadExecutor
[main] INFO org.quartz.simpl.SimpleThreadPool - Job execution threads will use class loader of thread: main
[main] INFO org.quartz.core.SchedulerSignalerImpl - Initialized Scheduler Signaller of type: class org.quartz.core.SchedulerSignalerImpl
[main] INFO org.quartz.core.QuartzScheduler - Quartz Scheduler v.2.3.0 created.
[main] INFO org.quartz.simpl.RAMJobStore - RAMJobStore initialized.
[main] INFO org.quartz.core.QuartzScheduler - Scheduler meta-data: Quartz Scheduler (v2.3.0) 'DefaultQuartzScheduler' with instanceId 'NON_CLUSTERED'
  Scheduler class: 'org.quartz.core.QuartzScheduler' - running locally.
  NOT STARTED.
  Currently in standby mode.
  Number of jobs executed: 0
  Using thread pool 'org.quartz.simpl.SimpleThreadPool' - with 10 threads.
  Using job-store 'org.quartz.simpl.RAMJobStore' - which does not support persistence. and is not clustered.

[main] INFO org.quartz.impl.StdSchedulerFactory - Quartz scheduler 'DefaultQuartzScheduler' initialized from default resource file in Quartz package: 'quartz.properties'
[main] INFO org.quartz.impl.StdSchedulerFactory - Quartz scheduler version: 2.3.0
[main] INFO org.quartz.examples.example10.PlugInExample - ------- Initialization Complete -----------
[main] INFO org.quartz.examples.example10.PlugInExample - ------- (Not Scheduling any Jobs - relying on XML definitions --
[main] INFO org.quartz.examples.example10.PlugInExample - ------- Starting Scheduler ----------------
[main] INFO org.quartz.core.QuartzScheduler - Scheduler DefaultQuartzScheduler_$_NON_CLUSTERED started.
[main] INFO org.quartz.examples.example10.PlugInExample - ------- Started Scheduler -----------------
[main] INFO org.quartz.examples.example10.PlugInExample - ------- Waiting five minutes... -----------
[main] INFO org.quartz.examples.example10.PlugInExample - ------- Shutting Down ---------------------
[main] INFO org.quartz.core.QuartzScheduler - Scheduler DefaultQuartzScheduler_$_NON_CLUSTERED shutting down.
[main] INFO org.quartz.core.QuartzScheduler - Scheduler DefaultQuartzScheduler_$_NON_CLUSTERED paused.
[main] INFO org.quartz.core.QuartzScheduler - Scheduler DefaultQuartzScheduler_$_NON_CLUSTERED shutdown complete.
[main] INFO org.quartz.examples.example10.PlugInExample - ------- Shutdown Complete -----------------
[main] INFO org.quartz.examples.example10.PlugInExample - Executed 0 jobs.

Process finished with exit code 0