类 StepContextRepeatCallback

构造器详细资料

• StepContextRepeatCallback

  public StepContextRepeatCallback​(StepExecution stepExecution)

  参数:

  stepExecution - instance of StepExecution to be used by StepContextRepeatCallback.

方法详细资料

• doInIteration

  public RepeatStatus doInIteration​(RepeatContext context)
                             throws java.lang.Exception

  Manage the StepContext lifecycle. Business processing should be delegated to doInChunkContext(RepeatContext, ChunkContext). This is to ensure that the current thread has a reference to the context, even if the callback is executed in a pooled thread. Handles the registration and unregistration of the step context, so clients should not duplicate those calls.

  指定者:

  doInIteration 在接口中 RepeatCallback

  参数:

  context - the current context passed in by the caller.

  返回:

  an RepeatStatus which is continuable if there is (or may be) more data to process.

  抛出:

  java.lang.Exception - if there is a problem with the processing.

  另请参阅:

  RepeatCallback.doInIteration(RepeatContext)

• doInChunkContext

  public abstract RepeatStatus doInChunkContext​(RepeatContext context,
                                                ChunkContext chunkContext)
                                         throws java.lang.Exception

  Do the work required for this chunk of the step. The ChunkContext provided is managed by the base class, so that if there is still work to do for the task in hand state can be stored here. In a multi-threaded client, the base class ensures that only one thread at a time can be working on each instance of ChunkContext. Workers should signal that they are finished with a context by removing all the attributes they have added. If a worker does not remove them another thread might see stale state.

  参数:

  context - the current RepeatContext

  chunkContext - the chunk context in which to carry out the work

  返回:

  the repeat status from the execution

  抛出:

  java.lang.Exception - implementations can throw an exception if anything goes wrong