alluxio.job.replicate

Class ReplicateDefinition

java.lang.Object

alluxio.job.AbstractVoidJobDefinition<ReplicateConfig,SerializableVoid>

alluxio.job.replicate.ReplicateDefinition

All Implemented Interfaces:

JobDefinition<ReplicateConfig,SerializableVoid,SerializableVoid>

@NotThreadSafe
public final class ReplicateDefinition
extends AbstractVoidJobDefinition<ReplicateConfig,SerializableVoid>

A job to replicate a block. This job is invoked by the checker of replication level in FileSystemMaster.

Constructor Summary

Constructors

Constructor and Description
ReplicateDefinition() Constructs a new ReplicateDefinition.

Method Summary

Modifier and Type	Method and Description
Class<ReplicateConfig>	getJobConfigClass()
SerializableVoid	runTask(ReplicateConfig config, SerializableVoid arg, RunTaskContext context) Runs the task in the executor.
Map<WorkerInfo,SerializableVoid>	selectExecutors(ReplicateConfig config, List<WorkerInfo> jobWorkerInfoList, SelectExecutorsContext context) Selects the workers to run the task.

Methods inherited from class alluxio.job.AbstractVoidJobDefinition

join

Methods inherited from class java.lang.Object

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

Constructor Detail

ReplicateDefinition

public ReplicateDefinition()

Constructs a new ReplicateDefinition.

Method Detail

getJobConfigClass

public Class<ReplicateConfig> getJobConfigClass()

Returns:

the class of the associated JobConfig

selectExecutors

public Map<WorkerInfo,SerializableVoid> selectExecutors(ReplicateConfig config,
                                                        List<WorkerInfo> jobWorkerInfoList,
                                                        SelectExecutorsContext context)
                                                 throws Exception

Description copied from interface: JobDefinition

Selects the workers to run the task.

Parameters:

config - the job configuration

jobWorkerInfoList - the list of available workers' information

context - the context containing information used to select executors

Returns:

a map of selected workers to the parameters to pass along

Throws:

Exception - if any error occurs

runTask

public SerializableVoid runTask(ReplicateConfig config,
                                SerializableVoid arg,
                                RunTaskContext context)
                         throws Exception

Runs the task in the executor. This task will replicate the block.

Parameters:

config - the job configuration

arg - the arguments passed in

context - the context containing information used to execute a task

Returns:

the task result

Throws:

Exception - if any error occurs