![](/img/trans.png)
[英]spring batch, Itemwriterlistener is not registered and therefore not invoked, why?
[英]Why splitted flow is not invoked in spring batch?
我有以下工作配置:
@Bean
public Job job(Step databaseToDataBaseLowercaseSlaveStep) {
return jobBuilderFactory.get("myJob")
.incrementer(new RunIdIncrementer())
.flow(csvToDbLowercaseStep())
.next(databaseToDataBaseLowercaseSlaveStep)
.split(jobTaskExecutor())
.add(new FlowBuilder<Flow>("flow2")
.start(notificationStep())
.build()
)
.end()
.build();
}
预期的动作顺序:
csvToDbLowercaseStep
执行databaseToDataBaseLowercaseSlaveStep
b) notificationStep
实际操作顺序:
csvToDbLowercaseStep
执行databaseToDataBaseLowercaseSlaveStep
因此根本没有调用notificationStep
。 为什么? 我该如何纠正?
@Bean
public TaskExecutor jobTaskExecutor() {
ThreadPoolTaskExecutor taskExecutor = new ThreadPoolTaskExecutor();
// there are 21 sites currently hence we have 21 threads
taskExecutor.setMaxPoolSize(30);
taskExecutor.setCorePoolSize(25);
taskExecutor.setThreadGroupName("cust-job-exec-");
taskExecutor.setThreadNamePrefix("cust-job-exec-");
taskExecutor.afterPropertiesSet();
return taskExecutor;
}
不支持向状态链添加拆分,这是执行所需操作的正确方法(同步任务 1,然后并行执行任务 2 和 3):
public Job job() {
final Flow masterFlow = new FlowBuilder<Flow>("flow1").start(step("step1")).build();
final Flow slaveFlow = new FlowBuilder<Flow>("flow2").split(new SimpleAsyncTaskExecutor())
.add(
new FlowBuilder<Flow>("flow2.1").start(step("step2.1")).build(),
new FlowBuilder<Flow>("flow2.2").start(step("step2.2")).build())
.build();
return (jobBuilderFactory
.get("job")
.incrementer(new RunIdIncrementer())
.start(masterFlow)
.next(slaveFlow)
.build())
.build();
}
private TaskletStep step(final String name) {
return stepBuilderFactory.get(name)
.tasklet((StepContribution contribution, ChunkContext chunkContext) -> {
System.out.println(name + " start");
Thread.sleep(1000);
System.out.println(name + " end");
return RepeatStatus.FINISHED;
})
.build();
}
第一步开始
step1 结束
step2.1 开始
step2.2 开始
step2.1 结束
step2.2 结束
希望这可以帮助。
更新
您的代码正在尝试向状态链添加拆分,并且根据 FlowBuilder.SplitBuilder 的文档,它根本不受支持。
* <em>Note:</em> Adding a split to a chain of states is not supported. For example, the following configuration
* is not supported. Instead, the configuration would need to create a flow3 that was the split flow and assemble
* them separately.
*
* <pre>
* // instead of this
* Flow complexFlow = new FlowBuilder<SimpleFlow>("ComplexParallelFlow")
* .start(flow1)
* .next(flow2)
* .split(new SimpleAsyncTaskExecutor())
* .add(flow3, flow4)
* .build();
*
* // do this
* Flow splitFlow = new FlowBuilder<SimpleFlow>("parallelFlow")
* .start(flow3)
* .split(new SimpleAsyncTaskExecutor())
* .add(flow4).build();
*
* Flow complexFlow = new FlowBuilder<SimpleFlow>("ComplexParallelFlow")
* .start(flow1)
* .next(flow2)
* .next(splitFlow)
* .build();
* </pre>
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.