Spring中,batch 开始执行
在Spring框架中,批处理任务通常使用Spring Batch来实现。以下是一个简单的例子:运行一个Spring Batch Job。
- 首先,需要定义一个Job:
@Configuration
@EnableBatchProcessing
public class BatchConfiguration {
@Autowired
public JobBuilderFactory jobBuilderFactory;
@Autowired
public StepBuilderFactory stepBuilderFactory;
// Here we define the steps that will be used in the job.
@Bean
public Step myStep(ItemReader<MyItem> reader, ItemProcessor<MyItem, MyItem> processor,
ItemWriter<MyItem> writer) {
return stepBuilderFactory.get("myStep")
.<MyItem, MyItem> chunk(10)
.reader(reader)
.processor(processor)
.writer(writer)
.build();
}
// And here we define the job that uses the steps.
@Bean
public Job myJob(Step myStep) {
return jobBuilderFactory.get("myJob")
.incrementer(new RunIdIncrementer())
.flow(myStep)
.end()
.build();
}
}
- 创建一个JobLauncher来启动你的作业:
@Autowired
JobLauncher jobLauncher;
@Autowired
Job myJob;
public void run() {
try {
JobParameters parameters = new JobParametersBuilder().addLong("time",System.currentTimeMillis()).toJobParameters();
jobLauncher.run(myJob, parameters);
} catch (Exception e) {
e.printStackTrace();
}
}
以上代码示例将会创建并运行一个Spring Batch Job。这只是Spring Batch使用的一个基本示例,更复杂的逻辑,如错误处理、事务管理等,可能需要更复杂的配置。