Spring批處理分區有多個順序運行？

Question

我需要創建一個依次運行多個從屬步驟的主步驟。 我可以在主機中定義單個從機，但是我需要順序運行從機。

@Primary
@Profile(MASTER)
@Bean("masterStep")
public Step partitionCreateStepForRemote(StepBuilderFactory stepBuilderFactory,
                            @Qualifier("slave1") Step step,
                            MatchAsyncConfig asyncConfig,
                            MatchingAccountPartitioner partitioner,
                            JMSPartitionHandler messageChannelPartitionHandler,
                            JobRepository jobRepository,
                            @Qualifier("stepLocator") StepLocator stepLocator
)                 {

 SimpleStepExecutionSplitter splitter = new SimpleStepExecutionSplitter();
splitter.setPartitioner(partitioner);
splitter.setJobRepository(jobRepository);

return stepBuilderFactory.get("masterStep")
        .partitioner(step)
        .partitionHandler(messageChannelPartitionHandler)
        .splitter(splitter)
        .taskExecutor(asyncConfig.getAsyncExecutor())
        .build();
}

有沒有辦法在同一個分區下的單個主步驟中定義多個從步驟，如下所示？

public Step partitionCreateStepForRemote(StepBuilderFactory stepBuilderFactory,
                            @Qualifier("slave1") Step step,
                            @Qualifier("slave2") Step step,
                            @Qualifier("slave3") Step step, 
                            MatchAsyncConfig asyncConfig,
                            MatchingAccountPartitioner partitioner,
                            JMSPartitionHandler messageChannelPartitionHandler,
                            JobRepository jobRepository,
                            @Qualifier("stepLocator") StepLocator stepLocator
)                 {}

在此處輸入圖片說明

Answer 1

我只需要在從屬步驟內部定義Flow。 該流程將按順序進行。 從屬步驟不過是在內部定義所有子步驟而已。 因此，所有從屬步驟均並行運行，每個從屬均順序運行子級從屬步驟。

/**
 * @param stepBuilderFactory   step for run each partition
 * @return Step step 6 partition match
 */
@Profile({SINGLE, SLAVE})  //Not applicable for MASTER profile in remote partitioning case
@Bean("slaveStep")
public Step slaveStep(StepBuilderFactory stepBuilderFactory,
                               @Qualifier("readFromFileFlow") Flow flow
) {
    return stepBuilderFactory.get("slaveStep")
            .listener(stepListener())
            .flow(flow)
            .build();
}

@Profile({SINGLE, SLAVE})
@Bean
public ChildSlaveListener stepListener(){
    return new ChildSlaveListener();
}

@Profile({SINGLE, SLAVE})
@Bean("readFromFileFlow")
public Flow readFromFileFlow(@Qualifier("childSlaveStep1") Step childSlaveStep1,
                             @Qualifier("childSlaveStep2") Step childSlaveStep2) {
    // @formatter:off
    return new FlowBuilder<Flow>("readFromFileFlow")
            .start(childSlaveStep1)
            .on(FAILED).fail()
            .from(childSlaveStep1)
            .on(COMPLETED).to(childSlaveStep2)
            .start(childSlaveStep2)
            .on(FAILED).fail()
            .from(childSlaveStep2)
            .on(COMPLETED).end()
            .end();
    // @formatter:on
}