org.apache.flink.runtime.protocols

Interface InputSplitProviderProtocol

All Superinterfaces:

VersionedProtocol

All Known Implementing Classes:

JobManager

public interface InputSplitProviderProtocol
extends VersionedProtocol

The input split provider protocol is used to facilitate RPC calls related to the lazy split assignment which Nephele applies to provide better load balancing properties.

Method Summary

Methods

Modifier and Type	Method and Description
InputSplitWrapper	requestNextInputSplit(JobID jobID, ExecutionVertexID vertexID, IntegerRecord sequenceNumber) Requests the next split to be consumed by the task with the given execution vertex ID.

Method Detail

requestNextInputSplit

InputSplitWrapper requestNextInputSplit(JobID jobID,
                                      ExecutionVertexID vertexID,
                                      IntegerRecord sequenceNumber)
                                        throws IOException

Requests the next split to be consumed by the task with the given execution vertex ID.

Parameters:

jobID - the ID of the job the task to retrieve the next input split for belongs to

vertexID - the ID of the task to retrieve the next input split for

sequenceNumber - a sequence number, starting at 0 and increased by the task on each request

Returns:

a wrapper containing the next input split. The wrapped input split may also be null in case no more input splits shall be consumed by the task with the given execution vertex ID

Throws:

IOException - thrown if an I/O error occurs while retrieving the new input split