使用spring-task定時任務動態配置修改執行時間

spring-task定時任務動態配置修改執行時間

因項目需要,幾個定時任務需要人為動態設置執行時間,於是乎吧,就查閱相關資料,是可以動態設置的,廢話不多說,直接上代碼,一目瞭然。

package com.seckill.quartz;
import org.springframework.scheduling.Trigger;
import org.springframework.scheduling.TriggerContext;
import org.springframework.scheduling.annotation.EnableScheduling;
import org.springframework.scheduling.annotation.SchedulingConfigurer;
import org.springframework.scheduling.config.ScheduledTaskRegistrar;
import org.springframework.scheduling.support.CronTrigger;
import org.springframework.stereotype.Component;
import java.text.SimpleDateFormat;
import java.util.Date;
 
/**
 * Created by loup on 2017/11/11.
 */
@Component
@EnableScheduling
public class DynamicScheduledTask implements SchedulingConfigurer {
    //時間表達式  每2秒執行一次
    private String cron = "0/2 * * * * ?";
    private SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
 
    @Override
    public void configureTasks(ScheduledTaskRegistrar scheduledTaskRegistrar) {
        scheduledTaskRegistrar.addTriggerTask(new Runnable() {
            @Override
            public void run() {
                //任務邏輯
                System.out.println("---------------start-------------------");
                System.out.println("動態修改定時任務參數,時間表達式cron為:" + cron);
                System.out.println("當前時間為:" + sdf.format(new Date()));
                System.out.println("----------------end--------------------");
            }
        }, new Trigger() {
            @Override
            public Date nextExecutionTime(TriggerContext triggerContext) {
                CronTrigger cronTrigger = new CronTrigger(cron);
                Date nextExecDate = cronTrigger.nextExecutionTime(triggerContext);
                return nextExecDate;
            }
        });
    }
 
    public void setCron(String cron) {
        this.cron = cron;
    }
}

這個是定時任務調度執行器,采用的是註解的方式。首先要動態配置,要設置為@EnableScheduling,這是確保能夠動態,然後實現SchedulingConfigurer,重寫configureTasks方法,接下來就是這個的相關spring配置文件,要引入下面這個task,不然識別不瞭啊,配置文件就是這麼簡單

http://www.springframework.org/schema/task

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:task="http://www.springframework.org/schema/task"
       xmlns:context="http://www.springframework.org/schema/context"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
        http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/task
        http://www.springframework.org/schema/task/spring-task.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">
 
    <context:component-scan base-package="com.seckill.quartz"/> 
    <task:annotation-driven /> 
</beans>

接下來就是寫測試類,測試可不可行啊

package com.seckill.quartz;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
import java.io.IOException;
 
/**
 * Created by loup on 2017/11/11.
 */
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration({"classpath*:/conf/spring-quartz.xml"})
public class QuartzTest {
 
    @Autowired
    private DynamicScheduledTask dynamicScheduledTask;
 
    @Test
    public void test1(){
        try {
            Thread.sleep(10000);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        dynamicScheduledTask.setCron("0/10 * * * * ?");
        try {
            System.in.read();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

運行測試類,查看結果,達到效果,親測可用

spring schedule 動態配置執行時間

之前saas平臺實現動態修改定時任務的時間,都是通過xx-job這樣的框架來實現,這樣我們可以單獨一個服務來管理我們整個saas平臺的定時任務,但是最近給銀行做的一個小項目,需要本地化部署,所以我不想弄很多的服務,並且他們並沒有要求修改以後即時生效,所以我直接采用瞭 spring schedule結合mysql動態配置執行時間。

之前我們用的schedule通過註解的方式,隻能用靜態的corn表達式,如果想實現動態的需要實現SchedulingConfigurer,並且通過註解@EnableScheduling。如下:

package com.zqf.marketing.task;  
import com.zqf.db.marketingrobot.sys.model.RobotSysSwitch;
import com.zqf.marketing.sys.service.SwitchService;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Lazy;
import org.springframework.scheduling.Trigger;
import org.springframework.scheduling.TriggerContext;
import org.springframework.scheduling.annotation.EnableScheduling;
import org.springframework.scheduling.annotation.SchedulingConfigurer;
import org.springframework.scheduling.config.ScheduledTaskRegistrar;
import org.springframework.scheduling.support.CronTrigger;
import org.springframework.stereotype.Service; 
import java.util.Date;
 
/**
 * @author zhenghao
 * @description
 * @date 2019/1/22 21:50
 */
 
@Lazy(false)
@Service
@EnableScheduling
public class TestTaskService implements SchedulingConfigurer { 
    private static Logger log = LoggerFactory.getLogger(TestTaskService.class);
    @Autowired
    private SwitchService switchService;  
    private String SpringDynamicCronTask() {
        String cron = "0/5 * * * * ?";
        //從數據庫獲得配置的corn表達式
        RobotSysSwitch switchById = switchService.getSwitchById(5L);
        cron = switchById.getSwitchFlag();
        log.info(cron);
        return cron;
    } 
 
    @Override
    public void configureTasks(ScheduledTaskRegistrar scheduledTaskRegistrar) {
        scheduledTaskRegistrar.addTriggerTask(new Runnable() {
            @Override
            public void run() {
                // 任務邏輯
                log.info("task_task_tak");
            }
        }, new Trigger() {
            @Override
            public Date nextExecutionTime(TriggerContext triggerContext) {
                String s = SpringDynamicCronTask();
                // 任務觸發,可修改任務的執行周期
                CronTrigger trigger = new CronTrigger(s);
                Date nextExec = trigger.nextExecutionTime(triggerContext);
                return nextExec;
            }
        });  
    }
}

這樣我們就可以動態的修改task的執行時間,生效時間為,上一個任務的執行周期,也可以滿足我們現在需求,這樣就可以實習項目更加的靈活!

以上為個人經驗,希望能給大傢一個參考,也希望大傢多多支持WalkonNet。

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