Tomcat启动时自动启动Quartz调度程序

Question

我正在玩弄 Quarz库，但我无法让调度程序执行作业。这是设置：

我使用web.xml文件中的以下条目在启动时（Tomcat）启动调度程序：

<servlet>
  <servlet-name>QuartzInitializer</servlet-name>
  <servlet-class>org.quartz.ee.servlet.QuartzInitializerServlet</servlet-class>
  <init-param>
     <param-name>config-file</param-name>
     <param-value>quartz/quartz.properties</param-value>
  </init-param>
  <init-param>
    <param-name>shutdown-on-unload</param-name>
    <param-value>true</param-value>
  </init-param>
  <load-on-startup>2</load-on-startup>
</servlet>

"以及quartz.properties文件的内容："

org.quartz.scheduler.interruptJobsOnShutdownWithWait=true

#===================================================
# Configure the ThreadPool
#===================================================

org.quartz.threadPool.class = org.quartz.simpl.SimpleThreadPool
org.quartz.threadPool.threadCount = 10
org.quartz.threadPool.threadPriority = 5
org.quartz.threadPool.threadsInheritContextClassLoaderOfInitializingThread = true

#===================================================
# Configure the Job
#===================================================

org.quartz.plugin.jobInitializer.class = org.quartz.plugins.xml.XMLSchedulingDataProcessorPlugin
org.quartz.plugin.jobInitializer.fileNames = quartz/jobs.xml
org.quartz.plugin.jobInitializer.failOnFileNotFound = true
org.quartz.plugin.jobInitializer.scanInterval = 10
org.quartz.plugin.jobInitializer.wrapInUserTransaction = false

调度程序与Tomcat一起启动，从日志输出中可以看到：

INFO: QuartzInitializer: Scheduler has been started...
Sep 21, 2016 12:50:49 PM org.apache.catalina.core.ApplicationContext log
INFO: QuartzInitializer: Storing the Quartz Scheduler Factory in the servlet context at key: org.quartz.impl.StdSchedulerFactory.KEY
Sep 21, 2016 12:50:49 PM org.apache.coyote.AbstractProtocol start
INFO: Starting ProtocolHandler ["http-bio-8080"]
Sep 21, 2016 12:50:49 PM org.apache.catalina.startup.Catalina start
INFO: Server startup in 2373 ms

问题是Quarz任务从未被触发。这里是jobs.xml的内容：

<?xml version='1.0' encoding='utf-8'?>
<job-scheduling-data xmlns="http://www.quartz-scheduler.org/xml/JobSchedulingData"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://www.quartz-scheduler.org/xml/JobSchedulingData http://www.quartz-scheduler.org/xml/job_scheduling_data_1_8.xsd" version="1.8">
    <schedule>
    <job>
        <name>Job</name>
        <group>Job</group>
        <description>Testing the job</description>
        <job-class>dev.dit.scheduler.TestJob</job-class>
    </job>
    <trigger>
        <cron>
            <name>Trigger</name>
            <job-name>Trigger</job-name>
            <job-group>TriggerGroup</job-group>
            <cron-expression>0 0/5 * * * ?</cron-expression>
        </cron>
    </trigger>
</schedule>

测试作业（TestJob.java）类的内容如下：

public class TestJob implements Job {

    @Override
    public void execute(JobExecutionContext jobExecutionContext) throws JobExecutionException {
        System.out.println("Job executed!");
    }
}

有人能告诉我为什么TestJob从未被执行吗？

谢谢。

- Thomas Dittmar

Answer 1

经过一天半的尝试各种记录器等组合，我仔细阅读jobs.xml文件后发现了显而易见的问题。

正如您在我的原始示例中看到的那样，我将作业和作业组命名为：

<name>Job</name>
<group>Job</group>

但是我在触发器设置中没有引用名称和组名：

<job-name>Trigger</job-name>
<job-group>TriggerGroup</job-group>

这里是 jobs.xml 文件的正确设置：

<?xml version='1.0' encoding='utf-8'?>

<job-scheduling-data xmlns="http://www.quartz-scheduler.org/xml/JobSchedulingData"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://www.quartz-scheduler.org/xml/JobSchedulingData http://www.quartz-scheduler.org/xml/job_scheduling_data_2_0.xsd"
  version="2.0">

<pre-processing-commands>
    <delete-jobs-in-group>PROCESS_LEAD_JOB_GROUP</delete-jobs-in-group>
    <delete-triggers-in-group>PROCESS_LEAD_TRIGGER_GROUP</delete-triggers-in-group>
</pre-processing-commands>

<schedule>

    <job>
        <name>Job</name>
        <group>Jobs</group>
        <description>Testing the job</description>
        <job-class>dev.dit.scheduler.TestJob </job-class>
    </job>

    <trigger>
        <cron>
            <name>Trigger</name>
            <job-name>Job</job-name>
            <job-group>Jobs</job-group>
            <cron-expression>0/10 * * * * ?</cron-expression>
        </cron>
    </trigger>

</schedule>

我也将log4j.properties文件放在了类路径中：

log4j.rootLogger = INFO, STDOUT, FILE

log4j.appender.STDOUT=org.apache.log4j.ConsoleAppender
log4j.appender.STDOUT.layout=org.apache.log4j.PatternLayout
log4j.appender.STDOUT.layout.ConversionPattern=%-4r [%t] %-5p %c %x - %m%n

我将记录器添加到作业文件中：

。

package dev.dit.scheduler;

import org.apache.log4j.Logger;
import org.quartz.Job;
import org.quartz.JobExecutionContext;
import org.quartz.JobExecutionException;

public class TestJob implements Job {

  final static Logger logger = Logger.getLogger(TestJob.class);

  @Override
  public void execute(JobExecutionContext context) throws JobExecutionException {

    logger.info("Job executed!"); 
  }
}

现在一切正常。如果您发现这些信息有用，请点赞。

谢谢， Thomas

- Thomas Dittmar