org.apache.hadoop.hbase.master.snapshot

类 DisabledTableSnapshotHandler

java.lang.Object

org.apache.hadoop.hbase.executor.EventHandler

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

org.apache.hadoop.hbase.master.snapshot.DisabledTableSnapshotHandler

所有已实现的接口:

Comparable<Runnable>, Runnable, ForeignExceptionSnare, SnapshotSentinel

@InterfaceAudience.Private
 @InterfaceStability.Evolving
public class DisabledTableSnapshotHandler
extends TakeSnapshotHandler

Take a snapshot of a disabled table.

Table must exist when taking the snapshot, or results are undefined.

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
DisabledTableSnapshotHandler(org.apache.hadoop.hbase.shaded.protobuf.generated.SnapshotProtos.SnapshotDescription snapshot, MasterServices masterServices, SnapshotManager snapshotManager)

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.
DisabledTableSnapshotHandler	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	snapshotRegions(List<Pair<RegionInfo,ServerName>> regionsAndLocations) Snapshot the specified regions

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

DisabledTableSnapshotHandler

public DisabledTableSnapshotHandler(org.apache.hadoop.hbase.shaded.protobuf.generated.SnapshotProtos.SnapshotDescription snapshot,
                                    MasterServices masterServices,
                                    SnapshotManager snapshotManager)

参数:

snapshot - descriptor of the snapshot to take

masterServices - master services provider

方法详细资料

prepare

public DisabledTableSnapshotHandler 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

public void snapshotRegions(List<Pair<RegionInfo,ServerName>> regionsAndLocations)
                     throws IOException,
                            org.apache.zookeeper.KeeperException

从类复制的说明: TakeSnapshotHandler

Snapshot the specified regions

指定者:

snapshotRegions 在类中 TakeSnapshotHandler

抛出:

IOException

org.apache.zookeeper.KeeperException

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