org.apache.hadoop.hbase.master.snapshot

类 EnabledTableSnapshotHandler

java.lang.Object

org.apache.hadoop.hbase.executor.EventHandler

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

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

所有已实现的接口:

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.

另请参阅:

ProcedureCoordinator

字段概要

从类继承的字段 org.apache.hadoop.hbase.master.snapshot.TakeSnapshotHandler

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

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
EnabledTableSnapshotHandler(org.apache.hadoop.hbase.shaded.protobuf.generated.SnapshotProtos.SnapshotDescription snapshot, MasterServices master, SnapshotManager manager)

方法概要

限定符和类型	方法和说明
protected boolean	downgradeToSharedTableLock() When taking snapshot, first we must acquire the exclusive table lock to confirm that there are no ongoing merge/split procedures.
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<RegionInfo,ServerName>> regions) This method kicks off a snapshot procedure.

从类继承的方法 org.apache.hadoop.hbase.master.snapshot.TakeSnapshotHandler

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

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

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

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

EnabledTableSnapshotHandler

public EnabledTableSnapshotHandler(org.apache.hadoop.hbase.shaded.protobuf.generated.SnapshotProtos.SnapshotDescription snapshot,
                                   MasterServices master,
                                   SnapshotManager manager)

方法详细资料

prepare

public EnabledTableSnapshotHandler prepare()
                                    throws Exception

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 TakeSnapshotHandler

返回:

the instance of this class

抛出:

Exception - when something goes wrong

snapshotRegions

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

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

指定者:

snapshotRegions 在类中 TakeSnapshotHandler

抛出:

HBaseSnapshotException

IOException

downgradeToSharedTableLock

protected boolean downgradeToSharedTableLock()

从类复制的说明: TakeSnapshotHandler

When taking snapshot, first we must acquire the exclusive table lock to confirm that there are no ongoing merge/split procedures. But later, we should try our best to release the exclusive lock as this may hurt the availability, because we need to hold the shared lock when assigning regions.

See HBASE-21480 for more details.

指定者:

downgradeToSharedTableLock 在类中 TakeSnapshotHandler