org.gridgain.grid.kernal.processors.hadoop.proto

Class GridHadoopProtocolTaskAdapter<R>

java.lang.Object

org.gridgain.grid.kernal.processors.hadoop.proto.GridHadoopProtocolTaskAdapter<R>

All Implemented Interfaces:

Serializable, org.gridgain.grid.compute.GridComputeTask<GridHadoopProtocolTaskArguments,R>

Direct Known Subclasses:

GridHadoopProtocolJobStatusTask, GridHadoopProtocolKillJobTask, GridHadoopProtocolNextTaskIdTask, GridHadoopProtocolSubmitJobTask

@GridInternal
public abstract class GridHadoopProtocolTaskAdapter<R>
extends Object
implements org.gridgain.grid.compute.GridComputeTask<GridHadoopProtocolTaskArguments,R>

Hadoop protocol task adapter.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
GridHadoopProtocolTaskAdapter()

Method Summary

Methods

Modifier and Type	Method and Description
Map<? extends org.gridgain.grid.compute.GridComputeJob,org.gridgain.grid.GridNode>	map(List<org.gridgain.grid.GridNode> subgrid, GridHadoopProtocolTaskArguments arg)
R	reduce(List<org.gridgain.grid.compute.GridComputeJobResult> results)
org.gridgain.grid.compute.GridComputeJobResultPolicy	result(org.gridgain.grid.compute.GridComputeJobResult res, List<org.gridgain.grid.compute.GridComputeJobResult> rcvd)
abstract R	run(org.gridgain.grid.compute.GridComputeJobContext jobCtx, org.gridgain.grid.hadoop.GridHadoop hadoop, GridHadoopProtocolTaskArguments args) Run the task.

Methods inherited from class java.lang.Object

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

Constructor Detail

GridHadoopProtocolTaskAdapter

public GridHadoopProtocolTaskAdapter()

Method Detail

map

@Nullable
public Map<? extends org.gridgain.grid.compute.GridComputeJob,org.gridgain.grid.GridNode> map(List<org.gridgain.grid.GridNode> subgrid,
                                                                                              @Nullable
                                                                                              GridHadoopProtocolTaskArguments arg)
                                                                                       throws org.gridgain.grid.GridException

Specified by:

map in interface org.gridgain.grid.compute.GridComputeTask<GridHadoopProtocolTaskArguments,R>

Throws:

org.gridgain.grid.GridException

result

public org.gridgain.grid.compute.GridComputeJobResultPolicy result(org.gridgain.grid.compute.GridComputeJobResult res,
                                                          List<org.gridgain.grid.compute.GridComputeJobResult> rcvd)
                                                            throws org.gridgain.grid.GridException

Specified by:

result in interface org.gridgain.grid.compute.GridComputeTask<GridHadoopProtocolTaskArguments,R>

Throws:

org.gridgain.grid.GridException

reduce

@Nullable
public R reduce(List<org.gridgain.grid.compute.GridComputeJobResult> results)
         throws org.gridgain.grid.GridException

Specified by:

reduce in interface org.gridgain.grid.compute.GridComputeTask<GridHadoopProtocolTaskArguments,R>

Throws:

org.gridgain.grid.GridException

run

public abstract R run(org.gridgain.grid.compute.GridComputeJobContext jobCtx,
    org.gridgain.grid.hadoop.GridHadoop hadoop,
    GridHadoopProtocolTaskArguments args)
               throws org.gridgain.grid.GridException

Run the task.

Parameters:

jobCtx - Job context.

hadoop - Hadoop facade.

args - Arguments.

Returns:

Job result.

Throws:

org.gridgain.grid.GridException - If failed.