如何以编程方式创建触发器对象？

Question

我使用的是Spring quartz Scheduler,但我没有使用XML文件.我想以编程方式创建整个配置.

我写了以下代码.

package com.eaportal.service.impl;

import java.text.ParseException;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;

import org.quartz.JobDetail;
import org.springframework.scheduling.SchedulingException;
import org.springframework.scheduling.quartz.CronTriggerBean;
import org.springframework.scheduling.quartz.JobDetailBean;
import org.springframework.scheduling.quartz.SchedulerFactoryBean;

import com.eaportal.service.intfc.AuctionWinnerService;

public class NormalAuctionWinnerServiceImpl1 implements AuctionWinnerService {

    @SuppressWarnings("deprecation")
    public void declareWinner(int auctionId, Map<String, Object> parameterMap) {
        System.out.println("INSIDE DECLARE WINNER METHOD.");
        /** STEP 1 : INSTANTIATE TASK CLASS **/
        NormalAuctionWinnerTask1 runMeTask = new NormalAuctionWinnerTask1();
        System.out.println("FINISHED STEP 1");

        /** STEP 2 : INSTANTIATE JOB DETAIL CLASS AND SET ITS PROPERTIES **/
        Map<String,Object> jobDataAsMap = new HashMap<String,Object>();
        jobDataAsMap.put("runMeTask",runMeTask);
        JobDetailBean jdb = new JobDetailBean();
        jdb.setJobClass(NormalAuctionWinnerTask1.class);
        jdb.setJobDataAsMap(jobDataAsMap);
        System.out.println("FINISHED STEP 2");

        /** STEP 3 : INSTANTIATE CRON TRIGGER AND SET ITS PROPERTIES **/
        CronTriggerBean ctb = new CronTriggerBean();
        Date d1 = new Date();
        Date d2 = new Date();
        d2.setMinutes(d1.getMinutes()+10);
        ctb.setStartTime(d1);
        ctb.setEndTime(d2);
        ctb.setJobDetail(jdb);

        try {
            ctb.setCronExpression("59 * * * * ? *");
        } catch (ParseException e) {
            e.printStackTrace();
        }

        /** STEP 4 : INSTANTIATE SCHEDULER FACTORY BEAN AND SET ITS PROPERTIES **/
        SchedulerFactoryBean sfb = new SchedulerFactoryBean();
        sfb.setJobDetails(new JobDetail[]{jdb});
        try {
            sfb.start();
        } catch (SchedulingException e) {
            e.printStackTrace();
        }
    }

}

代码正在工作,除了触发器没有触发因为我没有设置它.

这里的问题是在XML配置中我们有schedulerFactoryBean的'triggers'属性,我们使用list来配置我们的触发器.

但我无法以编程方式设置相同的属性.SchedulerFactoryBean中有一个setTriggers方法,它接受一个Trigger数组但是如何创建它是问题所在.

我在最后4小时仍然没有成功的迹象.

有人可以帮我吗？

谢谢

Answer 1

我成功地使用Spring Scheduling Framework完成了这项工作.

我知道这是一个非常古老的帖子,但由于这个主题的内容很少,所以把它放在这里应该是一个更好的主意.

第一篇文章的代码中的主要问题是afterPropertiesSet()没有在JobDetail对象和CronTrigger对象上调用.afterProperties在cron准备好运行之前,该函数对输入的值进行一些处理.

此外,我使用了MethodInvokingJobDetailFactoryBean而不是常规jobDetail对象,因为它为我在给定类中由cron调用的函数提供了更大的灵活性.

这是我的代码:

package test.spring;

import org.quartz.JobDetail;
import org.quartz.Trigger;
import org.springframework.context.support.GenericApplicationContext;
import org.springframework.scheduling.SchedulingException;
import org.springframework.scheduling.quartz.CronTriggerBean;
import org.springframework.scheduling.quartz.MethodInvokingJobDetailFactoryBean;
import org.springframework.scheduling.quartz.SchedulerFactoryBean;

import java.text.ParseException;

public class ProgrammaticCron {

    public static void callWorkFlow() {
        System.out.println("Abhishek Jain");
    }

    public static void main (String[] args) {
        try {
            GenericApplicationContext applicationContext = new GenericApplicationContext();

            MethodInvokingJobDetailFactoryBean jdfb = new MethodInvokingJobDetailFactoryBean();
            jdfb.setTargetClass(ProgrammaticCron.class);
            jdfb.setTargetMethod("callWorkFlow");
            jdfb.setName("Trial program");
            jdfb.afterPropertiesSet();
            JobDetail jd = (JobDetail)jdfb.getObject();

            CronTriggerBean ctb = new CronTriggerBean();
            ctb.setJobDetail(jd);
            ctb.setName("Daily cron");
            ctb.setJobName(jd.getName());
            try {
                ctb.setCronExpression("59 * * * * ? *");
            } catch (ParseException e) {
                e.printStackTrace();
            }

            ctb.afterPropertiesSet();

            SchedulerFactoryBean sfb = new SchedulerFactoryBean();
            sfb.setJobDetails(new JobDetail[]{(JobDetail)jdfb.getObject()});
            sfb.setTriggers(new Trigger[]{ctb});
            sfb.afterPropertiesSet();
            try {
                sfb.start();
            } catch (SchedulingException e) {
                e.printStackTrace();
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

afterProperties()很重要,可以从其afterProperties实施中理解SchedulerFactoryBean如下:

    //---------------------------------------------------------------------
// Implementation of InitializingBean interface
//---------------------------------------------------------------------

public void afterPropertiesSet() throws Exception {
    if (this.dataSource == null && this.nonTransactionalDataSource != null) {
        this.dataSource = this.nonTransactionalDataSource;
    }

    if (this.applicationContext != null && this.resourceLoader == null) {
        this.resourceLoader = this.applicationContext;
    }

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

    initSchedulerFactory(schedulerFactory);

    if (this.resourceLoader != null) {
        // Make given ResourceLoader available for SchedulerFactory configuration.
        configTimeResourceLoaderHolder.set(this.resourceLoader);
    }
    if (this.taskExecutor != null) {
        // Make given TaskExecutor available for SchedulerFactory configuration.
        configTimeTaskExecutorHolder.set(this.taskExecutor);
    }
    if (this.dataSource != null) {
        // Make given DataSource available for SchedulerFactory configuration.
        configTimeDataSourceHolder.set(this.dataSource);
    }
    if (this.nonTransactionalDataSource != null) {
        // Make given non-transactional DataSource available for SchedulerFactory configuration.
        configTimeNonTransactionalDataSourceHolder.set(this.nonTransactionalDataSource);
    }


    // Get Scheduler instance from SchedulerFactory.
    try {
        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);
        }
    }

    finally {
        if (this.resourceLoader != null) {
            configTimeResourceLoaderHolder.remove();
        }
        if (this.taskExecutor != null) {
            configTimeTaskExecutorHolder.remove();
        }
        if (this.dataSource != null) {
            configTimeDataSourceHolder.remove();
        }
        if (this.nonTransactionalDataSource != null) {
            configTimeNonTransactionalDataSourceHolder.remove();
        }
    }

    registerListeners();
    registerJobsAndTriggers();
        }

您可能会注意到,所有诸如获取调度程序和使用触发器注册作业等任务都是作为此函数的一部分完成的.