Я хочу создать планировщик с Quartz 2.2 в динамическом веб-приложении Java. Я новичок в этой задаче. Я перепробовал все учебники по всему интернету. Я пытаюсь метод прослушивания контекста для инициализации планировщика. Это не похоже на работу. Программа hello world работает только в общем Java-приложении. для веб-приложения это выглядит сложно.

pom.xml:

    <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>test.ananth</groupId>
<artifactId>test-app</artifactId>
<packaging>war</packaging>
<version>1.0-SNAPSHOT</version>
<name>test-app Maven Webapp</name>
<url>http://maven.apache.org</url>
<dependencies>
    <dependency>
        <groupId>org.quartz-scheduler</groupId>
        <artifactId>quartz</artifactId>
        <version>2.2.1</version>
    </dependency>
    <dependency>
        <groupId>org.apache.tomcat</groupId>
        <artifactId>servlet-api</artifactId>
        <version>6.0.30</version>
    </dependency>
    <dependency>
        <groupId>log4j</groupId>
        <artifactId>log4j</artifactId>
        <version>1.2.16</version>
    </dependency>

    <dependency>
        <groupId>org.quartz-scheduler</groupId>
        <artifactId>quartz-jobs</artifactId>
        <version>2.2.0</version>
    </dependency>

    <dependency>
        <groupId>org.slf4j</groupId>
        <artifactId>slf4j-api</artifactId>
        <version>1.6.6</version>
    </dependency>

    <dependency>
        <groupId>junit</groupId>
        <artifactId>junit</artifactId>
        <version>3.8.1</version>
        <scope>test</scope>
    </dependency>
</dependencies>
<build>
    <finalName>test-app</finalName>
</build>

quartz.properties:

#org.quartz.scheduler.instanceName = MyScheduler
org.quartz.threadPool.threadCount = 3
org.quartz.jobStore.class = org.quartz.simpl.RAMJobStore

# Main Quartz configuration
org.quartz.scheduler.skipUpdateCheck = true
org.quartz.scheduler.instanceName = MyQuartzScheduler
org.quartz.scheduler.jobFactory.class = org.quartz.simpl.SimpleJobFactory
org.quartz.threadPool.class = org.quartz.simpl.SimpleThreadPool
#org.quartz.threadPool.threadCount = 5

HelloJob.java:

    package com.test;

    import org.quartz.Job;
    import org.quartz.JobExecutionContext;
    import org.quartz.JobExecutionException;

    public class HelloJob implements Job {

public HelloJob() {
}

public void execute(JobExecutionContext context)
        throws JobExecutionException {

    System.out.println("Hello!  HelloJob is executing.");
}
    }

пакет servlet.java com.test;

import static org.quartz.JobBuilder.newJob;
import static org.quartz.SimpleScheduleBuilder.simpleSchedule;
import static org.quartz.TriggerBuilder.newTrigger;

import javax.servlet.ServletConfig;
import javax.servlet.ServletContext;
import javax.servlet.http.HttpServlet;

import org.quartz.JobDetail;
import org.quartz.Scheduler;
import org.quartz.SchedulerException;
import org.quartz.Trigger;
import org.quartz.impl.StdSchedulerFactory;

public class MyServlet extends HttpServlet {

    /**
     * 
     */
    private static final long serialVersionUID = 1567185871113714035L;

    public void init(ServletConfig cfg) {
        String key = "org.quartz.impl.StdSchedulerFactory.KEY";
        ServletContext servletContext = cfg.getServletContext();
        StdSchedulerFactory factory = (StdSchedulerFactory) servletContext
                .getAttribute(key);
        // Scheduler quartzScheduler = factory.getScheduler("MyQuartzScheduler");
        Scheduler sched;
        try {
            sched = factory.getScheduler("MyQuartzScheduler");
            //sched = factory.getScheduler();//MyQuartzScheduler
            sched.start();

            // define the job and tie it to our HelloJob class
            JobDetail job = newJob(HelloJob.class).withIdentity("myJob",
                    "group1").build();

            // Trigger the job to run now, and then every 40 seconds
            Trigger trigger = newTrigger()
                    .withIdentity("myTrigger", "group1")
                    .startNow()
                    .withSchedule(
                            simpleSchedule().withIntervalInSeconds(4)
                                    .repeatForever()).build();

            // Tell quartz to schedule the job using our trigger
            sched.scheduleJob(job, trigger);
        } catch (SchedulerException e) {
            e.printStackTrace();
        }

    }
}

web.xml:

<!DOCTYPE web-app PUBLIC
 "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
 "http://java.sun.com/dtd/web-app_2_3.dtd" >

<web-app>
    <context-param>
        <context-param>
            <param-name>quartz:shutdown-on-unload</param-name>
            <param-value>false</param-value>
        </context-param>
        <context-param>
            <param-name>quartz:wait-on-shutdown</param-name>
            <param-value>true</param-value>
        </context-param>
        <context-param>
            <param-name>quartz:start-scheduler-on-load</param-name>
            <param-value>true</param-value>
        </context-param>
        <context-param>
            <param-name>quartz:config-file</param-name>
            <param-value>/WEB-INF/quartz.properties</param-value>
        </context-param>

        <listener>
            <listener-class>
                org.quartz.ee.servlet.QuartzInitializerListener
            </listener-class>
        </listener>

        <listener>
            <listener-class>com.test.ApplicationStartup</listener-class>
        </listener>
        <display-name>Archetype Created Web Application</display-name>
</web-app>

Я использую веб-приложение Maven Archtype.