org.apache.storm.trident.testing

Class FeederBatchSpout

java.lang.Object

org.apache.storm.trident.testing.FeederBatchSpout

All Implemented Interfaces:

Serializable, ITridentDataSource, ITridentSpout, IFeeder

public class FeederBatchSpout
extends Object
implements ITridentSpout, IFeeder

See Also:

Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
class	FeederBatchSpout.FeederCoordinator

Nested classes/interfaces inherited from interface org.apache.storm.trident.spout.ITridentSpout

ITridentSpout.BatchCoordinator<X>, ITridentSpout.Emitter<X>

Constructor Summary

Constructors

Constructor and Description
FeederBatchSpout(List<String> fields)

Method Summary

Modifier and Type	Method and Description
void	feed(Object tuples)
Map<String,Object>	getComponentConfiguration()
ITridentSpout.BatchCoordinator	getCoordinator(String txStateId, Map conf, TopologyContext context) The coordinator for a TransactionalSpout runs in a single thread and indicates when batches of tuples should be emitted.
ITridentSpout.Emitter	getEmitter(String txStateId, Map conf, TopologyContext context) The emitter for a TransactionalSpout runs as many tasks across the cluster.
Fields	getOutputFields()
void	setWaitToEmit(boolean trueIfWait)

Methods inherited from class java.lang.Object

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

Constructor Detail

FeederBatchSpout

public FeederBatchSpout(List<String> fields)

Method Detail

setWaitToEmit

public void setWaitToEmit(boolean trueIfWait)

feed

public void feed(Object tuples)

Specified by:

feed in interface IFeeder

getComponentConfiguration

public Map<String,Object> getComponentConfiguration()

Specified by:

getComponentConfiguration in interface ITridentSpout

getOutputFields

public Fields getOutputFields()

Specified by:

getOutputFields in interface ITridentSpout

getCoordinator

public ITridentSpout.BatchCoordinator getCoordinator(String txStateId,
                                                     Map conf,
                                                     TopologyContext context)

Description copied from interface: ITridentSpout

The coordinator for a TransactionalSpout runs in a single thread and indicates when batches of tuples should be emitted. The Coordinator that you provide in a TransactionalSpout provides metadata for each transaction so that the transactions can be replayed in case of failure.

Two instances are requested, one on the master batch coordinator where isReady() is called, and an instance in the coordinator bolt which is used for all other operations. The two instances do not necessarily share a worker JVM.

Specified by:

getCoordinator in interface ITridentSpout

Parameters:

txStateId - stream id

conf - Storm config map

context - topology context

Returns:

spout coordinator instance

getEmitter

public ITridentSpout.Emitter getEmitter(String txStateId,
                                        Map conf,
                                        TopologyContext context)

Description copied from interface: ITridentSpout

The emitter for a TransactionalSpout runs as many tasks across the cluster. Emitters are responsible for emitting batches of tuples for a transaction and must ensure that the same batch of tuples is always emitted for the same transaction id.

All emitter tasks get the same transaction metadata. The topology context parameter contains the instance task id that can be used to distribute the work across the tasks.

Specified by:

getEmitter in interface ITridentSpout

Parameters:

txStateId - stream id

conf - Storm config map

context - topology context

Returns:

spout emitter