如何使用ThreadPoolTask​​Scheduler动态调度Spring Batch作业

时间:2015-03-17 16:00:08

标签: spring spring-batch job-scheduling

我有一个Spring Batch应用程序,我想在其中安排作业调用。

在构建时不知道调度间隔,所以我不能用@ Scheduled注释我的Job。这导致我使用ThreadPoolTask​​Scheduler。

方法是将Runnable作为参数。是否有可能以这种方式安排工作? 我可以直接从以下服务调用该作业,但我无法安排它。

以下是我的问题背景,我试图简化:

@Service
public class ScheduledProcessor{
    private final ThreadPoolTaskScheduler  threadPoolTaskScheduler;
    private Application application;   
    @Autowired
    public ScheduledProcessor(ThreadPoolTaskScheduler threadPoolTaskScheduler, Application application){
        this.threadPoolTaskScheduler = threadPoolTaskScheduler;
        this.application = application;
        scheduledTasks = new ArrayList();


        Trigger trigger = new CronTrigger("0/6 * * * * *");
//Here I am trying to schedule my job.
//The following line is wrong because a Job can't be cast to a Runnable but I wanted to show the intended behaviour.            
        threadPoolTaskScheduler.schedule((Runnable) application.importUserjob, trigger);
        System.out.println("Job launch !");
    }

这是JobBuilderFactory:

@Bean
public Job importUserJob(JobBuilderFactory jobs, Step s1, Step s2) {
    return jobs.get("importUserJob")
            .incrementer(new RunIdIncrementer())
            .flow(s1)
            .end()
            .build();
}

我理解(好吧,我甚至不确定)我不能直接将一个Job转换为Runnable但是可以以任何方式转换它吗?或者,您能否就能够动态安排弹簧批量作业的内容给出一些建议?

如果发生了变化,我还需要能够重启/跳过我的步骤,就像我目前可以使用threadPoolTask​​Scheduler一样。

提前感谢您提供的任何帮助或提示。

2 个答案:

答案 0 :(得分:3)

我终于得到了怎么做!

我创建了一个实现Runnable的类(为方便起见,扩展了Thread,这样就不需要实现所有Runnable类了。)

@Component
public class MyRunnableJob extends Thread implements Runnable{

    private Job job;
    private JobParameters jobParameters;
    private final JobOperator jobOperator;

    @Autowired
    public MyRunnableJob(JobOperator jobOperator) {
        this.jobOperator = jobOperator;
    }

    public void setJob(Job job){
        this.job=job;
    }

    @Override
    public void run(){
        try {
            String dateParam = new Date().toString();
            this.jobParameters = new JobParametersBuilder().addString("date", dateParam).toJobParameters();
            System.out.println("jobName : "+job.getName()+" at "+dateParam);

            jobOperator.start(job.getName(), jobParameters.toString());
        } catch (NoSuchJobException | JobInstanceAlreadyExistsException | JobParametersInvalidException ex) {
            Logger.getLogger(MyRunnableJob.class.getName()).log(Level.SEVERE, null, ex);
        }
    }
}

在我的ScheduledProcessor类中,我将Job设置为myRunnable类,然后将其作为schedule方法的参数传递。

public class SchedulingProcessor {

    //Autowired fields :
    private final JobLauncher jobLauncher;
    private final Job importUserJob;
    private final ThreadPoolTaskScheduler  threadPoolTaskScheduler;
    private final MyRunnableJob myRunnableJob;


    //Other fields :
    private List<ScheduledFuture> scheduledTasks;


    @Autowired
    public SchedulingProcessor(JobLauncher jobLauncher, Job importUserJob, ThreadPoolTaskScheduler  threadPoolTaskScheduler, MyRunnableJob myRunnableJob) throws Exception {
        this.jobLauncher=jobLauncher;
        this.importUserJob=importUserJob;
        this.threadPoolTaskScheduler=threadPoolTaskScheduler;
        this.myRunnableJob=myRunnableJob;
        Trigger trigger = new CronTrigger("0/6 * * * * *");
        myRunnableJob.setJob(this.importUserJob);
        scheduledTasks = new ArrayList();
        scheduledTasks.add(this.threadPoolTaskScheduler.schedule((Runnable) myRunnableJob, trigger));
    }        
}

scheduledTasks列表只是为了控制我刚安排的任务。

这个技巧使我能够动态地(感谢ThreadPoolTask​​Scheduler)调度封装在实现Runnable的类中的Spring Batch Jobs。我希望它可以像我一样帮助某人。

答案 1 :(得分:0)

这是另一种从弹簧环境中触发它们的方式。

    Job emailJob = (Job) applicationContext.getBean("xyzJob");
    JobLauncher launcher = (JobLauncher) applicationContext
            .getBean("jobLauncher");
    launcher.run(emailJob, new JobParameters());