alluxio.job.plan.replicate

Class SetReplicaDefinition

java.lang.Object

alluxio.job.plan.AbstractVoidPlanDefinition<SetReplicaConfig,SetReplicaTask>

alluxio.job.plan.replicate.SetReplicaDefinition

All Implemented Interfaces:

PlanDefinition<SetReplicaConfig,SetReplicaTask,SerializableVoid>

@NotThreadSafe
public final class SetReplicaDefinition
extends AbstractVoidPlanDefinition<SetReplicaConfig,SetReplicaTask>

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

Constructor Summary

Constructors

Constructor and Description
SetReplicaDefinition() Constructs a new SetReplicaDefinition.

Method Summary

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

Methods inherited from class alluxio.job.plan.AbstractVoidPlanDefinition

join

Methods inherited from class java.lang.Object

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

Constructor Detail

SetReplicaDefinition

public SetReplicaDefinition()

Constructs a new SetReplicaDefinition.

Method Detail

getJobConfigClass

public Class<SetReplicaConfig> getJobConfigClass()

Returns:

the class of the associated JobConfig

selectExecutors

public Set<Pair<WorkerInfo,SetReplicaTask>> selectExecutors(SetReplicaConfig config,
                                                            List<WorkerInfo> jobWorkerInfoList,
                                                            SelectExecutorsContext context)
                                                     throws Exception

Description copied from interface: PlanDefinition

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 set of pairs of selected workers to the parameters to pass along

Throws:

Exception - if any error occurs

runTask

public SerializableVoid runTask(SetReplicaConfig config,
                                SetReplicaTask task,
                                RunTaskContext context)
                         throws Exception

Runs the task in the executor. This task will set replica for the block.

Parameters:

config - the job configuration

task - the arguments passed in

context - the context containing information used to execute a task

Returns:

the task result

Throws:

Exception - if any error occurs