org.apache.storm.topology

Class BaseStatefulBoltExecutor.AnchoringOutputCollector

java.lang.Object

org.apache.storm.task.OutputCollector

org.apache.storm.topology.BaseStatefulBoltExecutor.AnchoringOutputCollector

All Implemented Interfaces:

IErrorReporter, IOutputCollector

Enclosing class:

BaseStatefulBoltExecutor

protected static class BaseStatefulBoltExecutor.AnchoringOutputCollector
extends OutputCollector

Method Summary

Modifier and Type	Method and Description
List<Integer>	emit(String streamId, List<Object> tuple) Emits a new unanchored tuple to the specified stream.
void	emitDirect(int taskId, String streamId, List<Object> tuple) Emits a tuple directly to the specified task id on the specified stream.

Methods inherited from class org.apache.storm.task.OutputCollector

ack, emit, emit, emit, emit, emit, emitDirect, emitDirect, emitDirect, emitDirect, emitDirect, fail, reportError, resetTimeout

Methods inherited from class java.lang.Object

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

Method Detail

emit

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

Description copied from class: OutputCollector

Emits a new unanchored tuple to the specified stream. Because it’s unanchored, if a failure happens downstream, this new tuple won’t affect whether any spout tuples are considered failed or not. The emitted values must be immutable.

Overrides:

emit in class OutputCollector

Parameters:

streamId - the stream to emit to

tuple - the new output tuple from this bolt

Returns:

the list of task ids that this new tuple was sent to

emitDirect

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

Description copied from class: OutputCollector

Emits a tuple directly to the specified task id on the specified stream. If the target bolt does not subscribe to this bolt using a direct grouping, the tuple will not be sent. If the specified output stream is not declared as direct, or the target bolt subscribes with a non-direct grouping, an error will occur at runtime. Note that this method does not use anchors, so downstream failures won’t affect the failure status of any spout tuples. The emitted values must be immutable.

Overrides:

emitDirect in class OutputCollector

Parameters:

taskId - the taskId to send the new tuple to

streamId - the stream to send the tuple on. It must be declared as a direct stream in the topology definition.

tuple - the new output tuple from this bolt