org.apache.hadoop.hbase.master.snapshot

类 CloneSnapshotHandler

java.lang.Object

org.apache.hadoop.hbase.executor.EventHandler

org.apache.hadoop.hbase.master.handler.CreateTableHandler

org.apache.hadoop.hbase.master.snapshot.CloneSnapshotHandler

所有已实现的接口:

Comparable<Runnable>, Runnable, SnapshotSentinel

@InterfaceAudience.Private
public class CloneSnapshotHandler
extends CreateTableHandler
implements SnapshotSentinel

Handler to Clone a snapshot.

Uses RestoreSnapshotHelper to create a new table with the same content of the specified snapshot.

嵌套类概要

从类继承的嵌套类/接口 org.apache.hadoop.hbase.executor.EventHandler

EventHandler.EventHandlerListener

字段概要

从类继承的字段 org.apache.hadoop.hbase.master.handler.CreateTableHandler

conf, fileSystemManager, hTableDescriptor

从类继承的字段 org.apache.hadoop.hbase.executor.EventHandler

eventType, seqids, server, waitingTimeForEvents

构造器概要

构造器

构造器和说明
CloneSnapshotHandler(MasterServices masterServices, org.apache.hadoop.hbase.protobuf.generated.HBaseProtos.SnapshotDescription snapshot, HTableDescriptor hTableDescriptor, boolean restoreAcl)

方法概要

方法

限定符和类型	方法和说明
protected void	addRegionsToMeta(List<HRegionInfo> regionInfos, int regionReplication) Add the specified set of regions to the hbase:meta table.
void	cancel(String why) Actively cancel a running snapshot.
protected void	completed(Throwable exception) Called after that process() is completed.
long	getCompletionTimestamp()
ForeignException	getExceptionIfFailed() Get the exception that caused the snapshot to fail, if the snapshot has failed.
org.apache.hadoop.hbase.protobuf.generated.HBaseProtos.SnapshotDescription	getSnapshot()
protected List<HRegionInfo>	handleCreateHdfsRegions(org.apache.hadoop.fs.Path tableRootDir, TableName tableName) Create the on-disk regions, using the tableRootDir provided by the CreateTableHandler.
boolean	isFinished() Check to see if the snapshot is finished, where finished may be success or failure.
CloneSnapshotHandler	prepare() Event handlers should do all the necessary checks in this method (rather than in the constructor, or in process()) so that the caller, which is mostly executed in the ipc context can fail fast.
void	rethrowExceptionIfFailed() Rethrow the exception returned by SnapshotSentinel.getExceptionIfFailed().

从类继承的方法 org.apache.hadoop.hbase.master.handler.CreateTableHandler

addReplicas, process, toString

从类继承的方法 org.apache.hadoop.hbase.executor.EventHandler

compareTo, getEventType, getInformativeName, getListener, getPriority, getSeqid, handleException, run, setListener

从类继承的方法 java.lang.Object

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

构造器详细资料

CloneSnapshotHandler

public CloneSnapshotHandler(MasterServices masterServices,
                    org.apache.hadoop.hbase.protobuf.generated.HBaseProtos.SnapshotDescription snapshot,
                    HTableDescriptor hTableDescriptor,
                    boolean restoreAcl)

方法详细资料

prepare

public CloneSnapshotHandler prepare()
                             throws NotAllMetaRegionsOnlineException,
                                    TableExistsException,
                                    IOException

从类复制的说明: EventHandler

Event handlers should do all the necessary checks in this method (rather than in the constructor, or in process()) so that the caller, which is mostly executed in the ipc context can fail fast. Process is executed async from the client ipc, so this method gives a quick chance to do some basic checks. Should be called after constructing the EventHandler, and before process().

覆盖:

prepare 在类中 CreateTableHandler

返回:

the instance of this class

抛出:

NotAllMetaRegionsOnlineException

TableExistsException

IOException

handleCreateHdfsRegions

protected List<HRegionInfo> handleCreateHdfsRegions(org.apache.hadoop.fs.Path tableRootDir,
                                        TableName tableName)
                                             throws IOException

Create the on-disk regions, using the tableRootDir provided by the CreateTableHandler. The cloned table will be created in a temp directory, and then the CreateTableHandler will be responsible to add the regions returned by this method to hbase:meta and do the assignment.

覆盖:

handleCreateHdfsRegions 在类中 CreateTableHandler

参数:

tableRootDir - directory where the table is being created

tableName - name of the table under construction

返回:

the list of regions created

抛出:

IOException

addRegionsToMeta

protected void addRegionsToMeta(List<HRegionInfo> regionInfos,
                    int regionReplication)
                         throws IOException

从类复制的说明: CreateTableHandler

Add the specified set of regions to the hbase:meta table.

覆盖:

addRegionsToMeta 在类中 CreateTableHandler

抛出:

IOException

completed

protected void completed(Throwable exception)

从类复制的说明: CreateTableHandler

Called after that process() is completed.

覆盖:

completed 在类中 CreateTableHandler

参数:

exception - null if process() is successful or not null if something has failed.

isFinished

public boolean isFinished()

从接口复制的说明: SnapshotSentinel

Check to see if the snapshot is finished, where finished may be success or failure.

指定者:

isFinished 在接口中 SnapshotSentinel

返回:

false if the snapshot is still in progress, true if the snapshot has finished

getCompletionTimestamp

public long getCompletionTimestamp()

指定者:

getCompletionTimestamp 在接口中 SnapshotSentinel

返回:

-1 if the snapshot is in progress, otherwise the completion timestamp.

getSnapshot

public org.apache.hadoop.hbase.protobuf.generated.HBaseProtos.SnapshotDescription getSnapshot()

指定者:

getSnapshot 在接口中 SnapshotSentinel

返回:

the description of the snapshot being run

cancel

public void cancel(String why)

从接口复制的说明: SnapshotSentinel

Actively cancel a running snapshot.

指定者:

cancel 在接口中 SnapshotSentinel

参数:

why - Reason for cancellation.

getExceptionIfFailed

public ForeignException getExceptionIfFailed()

从接口复制的说明: SnapshotSentinel

Get the exception that caused the snapshot to fail, if the snapshot has failed.

指定者:

getExceptionIfFailed 在接口中 SnapshotSentinel

返回:

ForeignException that caused the snapshot to fail, or null if the snapshot is still in progress or has succeeded

rethrowExceptionIfFailed

public void rethrowExceptionIfFailed()
                              throws ForeignException

从接口复制的说明: SnapshotSentinel

Rethrow the exception returned by SnapshotSentinel.getExceptionIfFailed(). If there is no exception this is a no-op.

指定者:

rethrowExceptionIfFailed 在接口中 SnapshotSentinel

抛出:

ForeignException - all exceptions from remote sources are procedure exceptions