org.apache.hadoop.hbase.master.snapshot

Class EnabledTableSnapshotHandler

java.lang.Object

org.apache.hadoop.hbase.executor.EventHandler

org.apache.hadoop.hbase.master.snapshot.TakeSnapshotHandler

org.apache.hadoop.hbase.master.snapshot.EnabledTableSnapshotHandler

All Implemented Interfaces:

Comparable<Runnable>, Runnable, ForeignExceptionSnare, SnapshotSentinel

@InterfaceAudience.Private
public class EnabledTableSnapshotHandler
extends TakeSnapshotHandler

Handle the master side of taking a snapshot of an online table, regardless of snapshot type. Uses a Procedure to run the snapshot across all the involved region servers.

See Also:

ProcedureCoordinator

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.hadoop.hbase.executor.EventHandler

EventHandler.EventHandlerListener

Field Summary

Fields inherited from class org.apache.hadoop.hbase.master.snapshot.TakeSnapshotHandler

conf, fs, htd, master, metricsSnapshot, monitor, rootDir, snapshot, snapshotManifest, snapshotTable, status, tableLock, tableLockManager, workingDir

Fields inherited from class org.apache.hadoop.hbase.executor.EventHandler

eventType, seqids, server, waitingTimeForEvents

Constructor Summary

Constructors

Constructor and Description
EnabledTableSnapshotHandler(HBaseProtos.SnapshotDescription snapshot, MasterServices master, SnapshotManager manager)

Method Summary

Methods

Modifier and Type	Method and Description
EnabledTableSnapshotHandler	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.
protected void	snapshotRegions(List<Pair<HRegionInfo,ServerName>> regions) This method kicks off a snapshot procedure.

Methods inherited from class org.apache.hadoop.hbase.master.snapshot.TakeSnapshotHandler

cancel, completeSnapshot, getCompletionTimestamp, getException, getExceptionIfFailed, getSnapshot, hasException, isFinished, process, releaseTableLock, rethrowException, rethrowExceptionIfFailed, snapshotDisabledRegion

Methods inherited from class org.apache.hadoop.hbase.executor.EventHandler

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

Methods inherited from class java.lang.Object

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

Constructor Detail

EnabledTableSnapshotHandler

public EnabledTableSnapshotHandler(HBaseProtos.SnapshotDescription snapshot,
                           MasterServices master,
                           SnapshotManager manager)

Method Detail

prepare

public EnabledTableSnapshotHandler prepare()
                                    throws Exception

Description copied from class: 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().

Overrides:

prepare in class TakeSnapshotHandler

Returns:

the instance of this class

Throws:

Exception - when something goes wrong

snapshotRegions

protected void snapshotRegions(List<Pair<HRegionInfo,ServerName>> regions)
                        throws HBaseSnapshotException,
                               IOException

This method kicks off a snapshot procedure. Other than that it hangs around for various phases to complete.

Specified by:

snapshotRegions in class TakeSnapshotHandler

Throws:

HBaseSnapshotException

IOException