Spring+quartz實現動態化定時任務 (轉)

中午君發表於2019-02-21


上官胡鬧
上官胡鬧
釋出於 2017/04/26 22:37
字數 1445
閱讀 567
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動態化定時任務主要是為了方便任務的實時開啟、暫停、重啟、停止。

下面主要記錄下具體實現步驟:

本例quartz的版本

 <!--定時任務框架-->
 <dependency>
     <groupId>org.quartz-scheduler</groupId>
     <artifactId>quartz</artifactId>
     <version>2.2.3</version>
  </dependency>複製程式碼

1.自定義實現動態任務工廠類

程式碼 如下

該類的作用是用來統一化管理任務的開啟、暫停、重啟、停止。

注意:該類使用了@Componemt註解,因此專案配置必須保證DynamicJobFactory的包能被註解掃描到,

程式碼中直接使用了job的class名稱作為了job名稱,因此加了一個jobName字首,它並沒有其它含義

#省略了包名
import org.quartz.*;
import org.quartz.impl.triggers.CronTriggerImpl;
import org.springframework.stereotype.Component;

import javax.annotation.Resource;

@Component
public class DynamicJobFactory {

    @Resource
    private Scheduler scheduler;

    /**
     * 新增job
     *
     * @param className      類名
     * @param cronExpression cron表示式
     * @throws Exception
     */
    public void addJob(String className, String cronExpression) throws Exception {
        Class clazz = Class.forName(className);
        JobDetail jobDetail = JobBuilder.newJob(clazz)
                .withIdentity("JobName:" + className, Scheduler.DEFAULT_GROUP)
                .withDescription("A test job")
                //如果需要給任務傳遞引數,可以用setJobData來設定引數
                 .setJobData(new JobDataMap())
                .build();
        CronTriggerImpl cronTrigger = new CronTriggerImpl();
        cronTrigger.setName("JobTrigger:" + className);
        cronTrigger.setCronExpression(cronExpression);
        JobKey jobKey = new JobKey("JobName:" + className, Scheduler.DEFAULT_GROUP);
        if(!scheduler.checkExists(jobKey)){
            scheduler.scheduleJob(jobDetail, cronTrigger);
        }
    }

    /**
     * 暫停job
     *
     * @param className 類名
     * @throws Exception
     */
    public void pause(String className) throws Exception {
        JobKey jobKey = new JobKey("JobName:" + className, Scheduler.DEFAULT_GROUP);
        scheduler.pauseJob(jobKey);
    }

    /**
     * 重啟job
     *
     * @param className
     * @throws Exception
     */
    public void resume(String className) throws Exception {
        JobKey jobKey = new JobKey("JobName:" + className, Scheduler.DEFAULT_GROUP);
        scheduler.resumeJob(jobKey);
    }

    /**
     * 停止job
     *
     * @param className
     * @throws Exception
     */
    public void stop(String className) throws Exception {
        JobKey jobKey = new JobKey("JobName:" + className, Scheduler.DEFAULT_GROUP);
        scheduler.deleteJob(jobKey);
    }

    /**
     * 修改job的執行時間
     *
     * @param className
     * @param cronExpression
     * @throws Exception
     */
    public void updateJobTime(String className, String cronExpression) throws Exception {
        TriggerKey triggerKey = new TriggerKey("JobTrigger:" + className,Scheduler.DEFAULT_GROUP);
        CronTriggerImpl trigger = (CronTriggerImpl) scheduler.getTrigger(triggerKey);
        if (trigger == null) {
            return;
        }
        String oldTime = trigger.getCronExpression();
        if (!oldTime.equalsIgnoreCase(cronExpression)) {
            trigger.setCronExpression(cronExpression);
            scheduler.rescheduleJob(triggerKey, trigger);
        }
    }

    /**
     * 獲取job資訊
     * @param className
     * @return
     * @throws Exception
     */
    public JobDetail getJobDetail(String className) throws Exception {
        JobKey jobKey = new JobKey("JobName:" + className, Scheduler.DEFAULT_GROUP);
        JobDetail detail = scheduler.getJobDetail(jobKey);
        return detail;
    }

    /**
     * 啟動所有的任務
     *
     * @throws SchedulerException
     */
    public void startJobs() throws SchedulerException {
        scheduler.start();
    }

    /**
     * shutdown所有的任務
     *
     * @throws SchedulerException
     */
    public void shutdownJobs() throws SchedulerException {
        if (!scheduler.isShutdown()) {
            scheduler.shutdown();
        }
    }

}
複製程式碼

2.自定義一個任務

public class MyJob extends QuartzJobBean {

    private static final Logger logger = LoggerFactory.getLogger(OpenConnectionJob.class);


    @Override
    protected void executeInternal(JobExecutionContext context) throws JobExecutionException {
        if(logger.isDebugEnabled()){
            logger.debug("Validate Job Running task  thread:{} ",Thread.currentThread().getName());
        }
        JobDetail jobDetail = context.getJobDetail();
        JobDataMap dataMap = jobDetail.getJobDataMap();
        System.out.println("jobData:"+ JSON.toJSONString(dataMap));
        JobKey jobKey = jobDetail.getKey();
        System.out.println("jobName:"+jobKey.getName());
    }
}複製程式碼

在MyJob中如果再用Spring 註解注入我們自己所寫的服務時,將會出現注入失敗,需要編寫額外的程式碼時實現自動注入

public class JobFactory extends AdaptableJobFactory {

    @Autowired
    private AutowireCapableBeanFactory capableBeanFactory;

    @Override
    protected Object createJobInstance(TriggerFiredBundle bundle) throws Exception {
        //呼叫父類的方法
        Object jobInstance = super.createJobInstance(bundle);
        //進行注入
        capableBeanFactory.autowireBean(jobInstance);
        return jobInstance;
    }
}複製程式碼

3.通過controller來測試任務

注意:涉及的CommonResult請自定修改為自己喜歡的返回方式

@RestController
@RequestMapping("job")
public class JobController {

    @Resource
    private DynamicJobFactory dynamicJobFactory;

    String className = "com.hunao.log.Job.MyJob";
    String cronExpression = "0/3 * * * * ?";

    /**
     * 新增一個新任務
     * @return
     */
    @RequestMapping(value = "/add")
    public CommonResult add(){
        CommonResult result = new CommonResult();
        try {
            dynamicJobFactory.addJob(className,cronExpression);
            result.setMessage("新增動態任務成功!");
            result.setSuccess(true);
        }catch (Exception e){
            e.printStackTrace();
            result.setMessage("新增任務出現異常");
        }
        return result;
    }

    /**
     * 暫停任務
     * @return
     */
    @RequestMapping(value="/pause")
    public CommonResult pause(){
        CommonResult result = new CommonResult();
        try {
            dynamicJobFactory.pause(className);
            result.setMessage("暫停任務成功!");
            result.setSuccess(true);
        }catch (Exception e){
            e.printStackTrace();
            result.setMessage("暫停任務出現異常");
        }
        return result;
    }

    /**
     * 重啟任務
     * @return
     */
    @RequestMapping(value="/resume")
    public CommonResult resume(){
        CommonResult result = new CommonResult();
        try {
            dynamicJobFactory.resume(className);
            result.setMessage("重啟任務成功!");
            result.setSuccess(true);
        }catch (Exception e){
            e.printStackTrace();
            result.setMessage("重啟任務出現異常");
        }
        return result;
    }

    /**
     * 停止任務
     * @return
     */
    @RequestMapping(value = "/stop")
    public CommonResult stop(){
        CommonResult result = new CommonResult();
        try{
            dynamicJobFactory.stop(className);
            result.setMessage("任務停止成功");
            result.setSuccess(true);
        }catch (Exception e){
            e.printStackTrace();
            result.setMessage("任務停止失敗");
        }
        return result;
    }

    /**
     * 修改任務執行時間
     * @return
     */
    @RequestMapping(value = "/update")
    public CommonResult update(){
        CommonResult result = new CommonResult();
        try {
            dynamicJobFactory.updateJobTime(className,"0/30 * * * * ?");
            result.setMessage("更新任務執行時間成功");
            result.setSuccess(true);
        }catch (Exception e){
            e.printStackTrace();
            result.setMessage("更新任務執行時間失敗");
        }
        return result;
    }

    /**
     * 檢視任務狀態
     * @return
     */
    @RequestMapping(value = "/detail")
    public CommonResult getJobDetail(){
        CommonResult result = new CommonResult();
        JobDetail jobDetail;
        try {
            jobDetail = dynamicJobFactory.getJobDetail(className);
            result.setMessage("獲取任務資訊成功");
            result.setSuccess(true);
            if(null != jobDetail){
                //JobDetail中的JobBuilder是不能序列化的。因此不能放JobDetail
                result.setData(jobDetail.getDescription());
            }
        }catch (Exception e){
            e.printStackTrace();
            result.setMessage("獲訊息異常");
        }
        return result;
    }
}複製程式碼

4.配置quartz

編寫一個配置檔案叫spring-quartz.xml(ps:叫什麼名字並不重要,重要的是根據功能切分配置檔案,方便識別)

裡面的配置如下:

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
       http://www.springframework.org/schema/beans/spring-beans.xsd">

    <!--自動注入工廠-->
    <bean id="jobFactory" class="com.hunao.log.Job.JobFactory"/>
    <!-- 總配置 -->
    <bean id="scheduler" class="org.springframework.scheduling.quartz.SchedulerFactoryBean">
        <property name="jobFactory" ref="jobFactory"></property>
        <!-- 載入 quartz.properties-->
        <property name="configLocation" value="classpath:quartz.properties"/>

    </bean>
</beans>複製程式碼

注意:quartz.properties是quartz框架預設載入的配置檔案,我們可以在該配置檔案中自定義quartz的任務執行緒數,因此也說明quartz預設就是多執行緒來跑定時任務的,如果需要單執行緒執行的,則需要將jobDetail的concurrent屬性改為false

quartz.properties中的大致內容:

# Default Properties file for use by StdSchedulerFactory
# to create a Quartz Scheduler Instance, if a different
# properties file is not explicitly specified.
#

org.quartz.scheduler.instanceName: DefaultQuartzScheduler
org.quartz.scheduler.rmi.export: false
org.quartz.scheduler.rmi.proxy: false
org.quartz.scheduler.wrapJobExecutionInUserTransaction: false

org.quartz.threadPool.class: org.quartz.simpl.SimpleThreadPool
org.quartz.threadPool.threadCount: 16
org.quartz.threadPool.threadPriority: 5
org.quartz.threadPool.threadsInheritContextClassLoaderOfInitializingThread: true

org.quartz.jobStore.misfireThreshold: 60000

org.quartz.jobStore.class: org.quartz.simpl.RAMJobStore複製程式碼

5.在web.xml中載入spring-quartz.xml

 <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>
            classpath:spring-quartz.xml
        </param-value>
    </context-param>複製程式碼

6.啟動web服務測試動態定時任務

在瀏覽器中資料:http://localhost:8080/xx/job/add回車後新增一個定時任務,然後觀察控制檯就能看到MyJob的輸出列印了,同理想要控制任務的執行,從瀏覽器端輸入相應url即可。

最後提示:

本例是在一個配置好的spring mvc專案想構建起來的,因此需要保證專案的web環境正常,對於

DynamicJobFactory這個裡面只有四個基礎方法,有時候並不能滿足實際需求,需要新增一些額外的操作介面,例如:動態修改正在執行任務的cron表示式(修改任務執行時間)、start或者shutdown所有的任務等等

在真實專案場景中,可將class名稱和cron表示式從資料庫讀取過來,實現任務的靈活配置


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