Package org.springframework.batch.integration.chunk

Interface ChunkHandler<T>

Type Parameters:
T - the type of the items to be processed (it is recommended to use a Memento like a primary key)
All Known Implementing Classes:
ChunkProcessorChunkHandler
public interface ChunkHandler<T>
Interface for a remote worker in the Remote Chunking pattern. A request comes from a manager process containing some items to be processed. Once the items are done with a response needs to be generated containing a summary of the result.
Author:
Dave Syer

  • Method Summary

    Modifier and Type
    Method
    Description
    ChunkResponse
    handleChunk(ChunkRequest<T> chunk)
    Handle the chunk, processing all the items and returning a response summarising the result.

  • Method Details

    • handleChunk

      ChunkResponse handleChunk(ChunkRequest<T> chunk) throws Exception
      Handle the chunk, processing all the items and returning a response summarising the result. If the result is a failure then the response should say so. The handler only throws an exception if it needs to roll back a transaction and knows that the request will be re-delivered (if not to the same handler then to one processing the same Step).
      Parameters:
      chunk - a request containing the chunk to process
      Returns:
      a response summarising the result
      Throws:
      Exception - if the handler needs to roll back a transaction and have the chunk re-delivered