Package org.apache.storm.coordination

# Class BatchOutputCollector

java.lang.Object
org.apache.storm.coordination.BatchOutputCollector

Direct Known Subclasses:
  `BatchOutputCollectorImpl`

public abstract class BatchOutputCollector extends Object

- ## Constructor Summary

  Constructors
  Constructor
  Description
  `BatchOutputCollector()`

- ## Method Summary

  Modifier and Type
  Method
  Description
  `abstract List<Integer>`
  `emit(String streamId, List<Object> tuple)`
  `List<Integer>`
  `emit(List<Object> tuple)`
  Emits a tuple to the default output stream.
  `abstract void`
  `emitDirect(int taskId, String streamId, List<Object> tuple)`
  `void`
  `emitDirect(int taskId, List<Object> tuple)`
  Emits a tuple to the specified task on the default output stream.
  `abstract void`
  `flush()`
  Flush any buffered tuples (when batching is enabled).
  `abstract void`
  `reportError(Throwable error)`

  ### Methods inherited from class java.lang.Object

  `clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

- ## Constructor Details

  - ### BatchOutputCollector

    public BatchOutputCollector()

- ## Method Details

  - ### emit

    public List<Integer> emit(List<Object> tuple)
    Emits a tuple to the default output stream.

  - ### emit

    public abstract List<Integer> emit(String streamId, List<Object> tuple)

  - ### emitDirect

    public void emitDirect(int taskId, List<Object> tuple)
    Emits a tuple to the specified task on the default output stream. This output stream must have been declared as a direct stream, and the specified task must use a direct grouping on this stream to receive the message.

  - ### emitDirect

    public abstract void emitDirect(int taskId, String streamId, List<Object> tuple)

  - ### flush

    public abstract void flush()
    Flush any buffered tuples (when batching is enabled).

  - ### reportError

    public abstract void reportError(Throwable error)