storm.trident.spout
Class BatchSpoutExecutor.EmptyCoordinator

java.lang.Object
  storm.trident.spout.BatchSpoutExecutor.EmptyCoordinator

All Implemented Interfaces:

ITridentSpout.BatchCoordinator

Enclosing class:

BatchSpoutExecutor

public static class BatchSpoutExecutor.EmptyCoordinator
extends Object
implements ITridentSpout.BatchCoordinator

Constructor Summary

BatchSpoutExecutor.EmptyCoordinator()

Method Summary

void	close() Release any resources from this coordinator.
Object	initializeTransaction(long txid, Object prevMetadata, Object currMetadata) Create metadata for this particular transaction id which has never been emitted before.
boolean	isReady(long txid)
void	success(long txid)

Methods inherited from class java.lang.Object

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

Constructor Detail

BatchSpoutExecutor.EmptyCoordinator

public BatchSpoutExecutor.EmptyCoordinator()

Method Detail

initializeTransaction

public Object initializeTransaction(long txid,
                                    Object prevMetadata,
                                    Object currMetadata)

Description copied from interface: ITridentSpout.BatchCoordinator

Create metadata for this particular transaction id which has never been emitted before. The metadata should contain whatever is necessary to be able to replay the exact batch for the transaction at a later point. The metadata is stored in Zookeeper. Storm uses the Kryo serializations configured in the component configuration for this spout to serialize and deserialize the metadata.

Specified by:

initializeTransaction in interface ITridentSpout.BatchCoordinator

Parameters:

txid - The id of the transaction.

prevMetadata - The metadata of the previous transaction

currMetadata - The metadata for this transaction the last time it was initialized. null if this is the first attempt

Returns:

the metadata for this new transaction

close

public void close()

Description copied from interface: ITridentSpout.BatchCoordinator

Release any resources from this coordinator.

Specified by:

close in interface ITridentSpout.BatchCoordinator

success

public void success(long txid)

Specified by:

success in interface ITridentSpout.BatchCoordinator

isReady

public boolean isReady(long txid)

Specified by:

isReady in interface ITridentSpout.BatchCoordinator