org.apache.hadoop.hdfs.server.datanode

Interface Replica

All Known Subinterfaces:

ReplicaInPipelineInterface

All Known Implementing Classes:

FinalizedReplica, ReplicaBeingWritten, ReplicaInfo, ReplicaInPipeline, ReplicaUnderRecovery, ReplicaWaitingToBeRecovered

@InterfaceAudience.Private
public interface Replica

This represents block replicas which are stored in DataNode.

Method Summary

Methods

Modifier and Type	Method and Description
long	getBlockId() Get the block ID
long	getBytesOnDisk() Get the number of bytes that have written to disk
long	getGenerationStamp() Get the generation stamp
long	getNumBytes() Get the number of bytes received
HdfsServerConstants.ReplicaState	getState() Get the replica state
long	getVisibleLength() Get the number of bytes that are visible to readers

Method Detail

getBlockId

long getBlockId()

Get the block ID

getGenerationStamp

long getGenerationStamp()

Get the generation stamp

getState

HdfsServerConstants.ReplicaState getState()

Get the replica state

Returns:

the replica state

getNumBytes

long getNumBytes()

Get the number of bytes received

Returns:

the number of bytes that have been received

getBytesOnDisk

long getBytesOnDisk()

Get the number of bytes that have written to disk

Returns:

the number of bytes that have written to disk

getVisibleLength

long getVisibleLength()

Get the number of bytes that are visible to readers

Returns:

the number of bytes that are visible to readers