Package org.springframework.batch.repeat

Interface RepeatListener

All Known Implementing Classes:
CompositeRepeatListener, RepeatListenerSupport
public interface RepeatListener
Interface for listeners to the batch process. Implementers can provide enhance the behaviour of a batch in small cross-cutting modules. The framework provides callbacks at key points in the processing.
Author:
Dave Syer, Mahmoud Ben Hassine

  • Method Summary

    Modifier and Type
    Method
    Description
    default void
    after(RepeatContext context, RepeatStatus result)
    Called by the framework after each item has been processed, unless the item processing results in an exception.
    default void
    before(RepeatContext context)
    Called by the framework before each batch item.
    default void
    close(RepeatContext context)
    Called once at the end of a complete batch, after normal or abnormal completion (i.e. even after an exception).
    default void
    onError(RepeatContext context, Throwable e)
    Called when a repeat callback fails by throwing an exception.
    default void
    open(RepeatContext context)
    Called once at the start of a complete batch, before any items are processed.

  • Method Details

    • before

      default void before(RepeatContext context)
      Called by the framework before each batch item. Implementers can halt a batch by setting the complete flag on the context.
      Parameters:
      context - the current batch context.

    • after

      default void after(RepeatContext context, RepeatStatus result)
      Called by the framework after each item has been processed, unless the item processing results in an exception. This method is called as soon as the result is known.
      Parameters:
      context - the current batch context
      result - the result of the callback

    • open

      default void open(RepeatContext context)
      Called once at the start of a complete batch, before any items are processed. Implementers can use this method to acquire any resources that might be needed during processing. Implementers can halt the current operation by setting the complete flag on the context. To halt all enclosing batches (the whole job), the would need to use the parent context (recursively).
      Parameters:
      context - the current batch context

    • onError

      default void onError(RepeatContext context, Throwable e)
      Called when a repeat callback fails by throwing an exception. There will be one call to this method for each exception thrown during a repeat operation (e.g. a chunk).
      There is no need to re-throw the exception here - that will be done by the enclosing framework.
      Parameters:
      context - the current batch context
      e - the error that was encountered in an item callback.

    • close

      default void close(RepeatContext context)
      Called once at the end of a complete batch, after normal or abnormal completion (i.e. even after an exception). Implementers can use this method to clean up any resources.
      Parameters:
      context - the current batch context.