原文: https://howtodoinjava.com/spring-batch/job-scheduler-example/
在企业应用程序中,您将需要将 cron 表达式传递给 Spring TaskScheduler
,在固定的时间表上定期执行 Spring Batch 作业。 在此示例中,我们将使用 spring 的内置调度功能执行示例 Spring Batch 作业。
配置批处理作业调度程序
要配置,批处理作业调度分两个步骤完成:
- 启用带有
@EnableScheduling
注解的调度。 - 创建带有
@Scheduled
注解的方法,并使用 cron 作业提供重复详细信息。 在此方法内添加作业执行逻辑。
Cron scheduling on spring batch job
package com.howtodoinjava.demo;
import org.springframework.batch.core.Job;
import org.springframework.batch.core.JobParameters;
import org.springframework.batch.core.JobParametersBuilder;
import org.springframework.batch.core.launch.JobLauncher;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.scheduling.annotation.EnableScheduling;
import org.springframework.scheduling.annotation.Scheduled;
@SpringBootApplication
@EnableScheduling
public class App
{
@Autowired
JobLauncher jobLauncher;
@Autowired
Job job;
public static void main(String[] args)
{
SpringApplication.run(App.class, args);
}
@Scheduled(cron = "0 */1 * * * ?")
public void perform() throws Exception
{
JobParameters params = new JobParametersBuilder()
.addString("JobID", String.valueOf(System.currentTimeMillis()))
.toJobParameters();
jobLauncher.run(job, params);
}
}
批处理作业将在应用程序启动后每隔一分钟运行一次。
要引用作业和任务源代码,请阅读 Spring batch Java 配置示例。
示例
现在,如果您运行该应用程序并验证日志,您将看到该作业每分钟都在运行。
Console
2018-07-04 15:57:00.073 INFO 7320 --- [pool-1-thread-1] o.s.b.c.l.support.SimpleJobLauncher
: Job: [SimpleJob: [name=demoJob]] launched with the following parameters: [{JobID=1530700020003}]
2018-07-04 15:57:00.097 INFO 7320 --- [pool-1-thread-1] o.s.batch.core.job.SimpleStepHandler
: Executing step: [stepOne]
MyTaskOne start..
MyTaskOne done..
2018-07-04 15:57:00.118 INFO 7320 --- [pool-1-thread-1] o.s.batch.core.job.SimpleStepHandler
: Executing step: [stepTwo]
MyTaskTwo start..
MyTaskTwo done..
2018-07-04 15:57:00.125 INFO 7320 --- [pool-1-thread-1] o.s.b.c.l.support.SimpleJobLauncher
: Job: [SimpleJob: [name=demoJob]] completed with the following parameters: [{JobID=1530700020003}]
and the following status: [COMPLETED]
2018-07-04 15:58:00.007 INFO 7320 --- [pool-1-thread-1] o.s.b.c.l.support.SimpleJobLauncher
: Job: [SimpleJob: [name=demoJob]] launched with the following parameters: [{JobID=1530700080002}]
2018-07-04 15:58:00.011 INFO 7320 --- [pool-1-thread-1] o.s.batch.core.job.SimpleStepHandler
: Executing step: [stepOne]
MyTaskOne start..
MyTaskOne done..
2018-07-04 15:58:00.021 INFO 7320 --- [pool-1-thread-1] o.s.batch.core.job.SimpleStepHandler
: Executing step: [stepTwo]
MyTaskTwo start..
MyTaskTwo done..
2018-07-04 15:58:00.029 INFO 7320 --- [pool-1-thread-1] o.s.b.c.l.support.SimpleJobLauncher
: Job: [SimpleJob: [name=demoJob]] completed with the following parameters: [{JobID=1530700080002}]
and the following status: [COMPLETED]
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