alluxio.job.replicate

Class DefaultReplicationHandler

java.lang.Object

alluxio.job.replicate.DefaultReplicationHandler

All Implemented Interfaces:

ReplicationHandler

@ThreadSafe
public final class DefaultReplicationHandler
extends Object
implements ReplicationHandler

The implementation of ReplicationHandler that utilizes job service.

Constructor Summary

Constructors

Constructor and Description
DefaultReplicationHandler(JobMasterClientPool jobMasterClientPool) Creates a new instance of DefaultReplicationHandler.

Method Summary

Modifier and Type	Method and Description
long	evict(alluxio.AlluxioURI uri, long blockId, int numReplicas) Decreases the block replication level by a target number of replicas.
long	replicate(alluxio.AlluxioURI uri, long blockId, int numReplicas) Increases the block replication level by a target number of replicas.

Methods inherited from class java.lang.Object

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

Constructor Detail

DefaultReplicationHandler

public DefaultReplicationHandler(JobMasterClientPool jobMasterClientPool)

Creates a new instance of DefaultReplicationHandler.

Parameters:

jobMasterClientPool - job master client pool

Method Detail

evict

public long evict(alluxio.AlluxioURI uri,
                  long blockId,
                  int numReplicas)
           throws alluxio.exception.AlluxioException,
                  IOException

Description copied from interface: ReplicationHandler

Decreases the block replication level by a target number of replicas.

Specified by:

evict in interface ReplicationHandler

Parameters:

uri - URI of the file the block belongs to

blockId - ID of the block

numReplicas - how many replicas to remove

Returns:

the ID of the replicate job

Throws:

alluxio.exception.AlluxioException - if an Alluxio error is encountered

IOException - if a non-Alluxio error is encountered

replicate

public long replicate(alluxio.AlluxioURI uri,
                      long blockId,
                      int numReplicas)
               throws alluxio.exception.AlluxioException,
                      IOException

Description copied from interface: ReplicationHandler

Increases the block replication level by a target number of replicas.

Specified by:

replicate in interface ReplicationHandler

Parameters:

uri - URI of the file the block belongs to

blockId - ID of the block

numReplicas - how many replicas to add

Returns:

the ID of the replicate job

Throws:

alluxio.exception.AlluxioException - if an Alluxio error is encountered

IOException - if a non-Alluxio error is encountered