StepExecutionListener (Spring Batch 4.1.4.RELEASE API)

所有超级接口:
StepListener
所有已知实现类:
ChunkMessageChannelItemWriter, CompositeCustomerUpdateLineTokenizer, CompositeStepExecutionListener, ExecutionContextPromotionListener, GeneratingTradeResettingListener, InfiniteLoopWriter, JobParameterExecutionContextCopyListener, MulticasterBatchListener, NoWorkFoundStepExecutionListener, StagingItemListener, StagingItemReader, StagingItemWriter, StepExecutionListenerSupport, StepExecutionSimpleCompletionPolicy, StepListenerAdapter, StepListenerSupport, SummaryFooterCallback, SystemCommandTasklet
```
public interface StepExecutionListener
extends StepListener
```
Listener interface for the lifecycle of a Step.
作者:
Lucas Ward, Dave Syer, Mahmoud Ben Hassine

方法概要

所有方法实例方法抽象方法
修饰符和类型	方法	说明
`ExitStatus`	`afterStep(StepExecution stepExecution)`	Give a listener a chance to modify the exit status from a step.
`void`	`beforeStep(StepExecution stepExecution)`	Initialize the state of the listener with the `StepExecution` from the current scope.

- 方法详细资料
  - beforeStep
```
void beforeStep(StepExecution stepExecution)
```
    Initialize the state of the listener with the StepExecution from the current scope.
    参数:
    stepExecution - instance of StepExecution.
  - afterStep
```
@Nullable
ExitStatus afterStep(StepExecution stepExecution)
```
    Give a listener a chance to modify the exit status from a step. The value returned will be combined with the normal exit status using ExitStatus.and(ExitStatus). Called after execution of step's processing logic (both successful or failed). Throwing exception in this method has no effect, it will only be logged.
    参数:
    stepExecution - StepExecution instance.
    返回:
    an ExitStatus to combine with the normal value. Return null to leave the old value unchanged.