org.apache.hadoop.hbase.replication

Class VerifyWALEntriesReplicationEndpoint

java.lang.Object

org.apache.hbase.thirdparty.com.google.common.util.concurrent.AbstractService

org.apache.hadoop.hbase.replication.BaseReplicationEndpoint

org.apache.hadoop.hbase.replication.VerifyWALEntriesReplicationEndpoint

All Implemented Interfaces:

ReplicationEndpoint, ReplicationPeerConfigListener, org.apache.hbase.thirdparty.com.google.common.util.concurrent.Service

@InterfaceAudience.Private
public class VerifyWALEntriesReplicationEndpoint
extends BaseReplicationEndpoint

A dummy ReplicationEndpoint that replicates nothing.

Mainly used by ITBLL to check whether all the entries in WAL files are fine, since for normal case, we will only read the WAL files when there are region servers crash and we need to split the log, but for replication we will read all the entries and pass them to the ReplicationEndpoint, so setting up a replication peer can help finding out whether there are broken entries in WAL files.

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.hadoop.hbase.replication.ReplicationEndpoint

ReplicationEndpoint.Context, ReplicationEndpoint.ReplicateContext

Nested classes/interfaces inherited from interface org.apache.hbase.thirdparty.com.google.common.util.concurrent.Service

org.apache.hbase.thirdparty.com.google.common.util.concurrent.Service.Listener, org.apache.hbase.thirdparty.com.google.common.util.concurrent.Service.State

Field Summary

Fields inherited from class org.apache.hadoop.hbase.replication.BaseReplicationEndpoint

ctx, REPLICATION_WALENTRYFILTER_CONFIG_KEY

Constructor Summary

Constructors

Constructor and Description
VerifyWALEntriesReplicationEndpoint()

Method Summary

Modifier and Type	Method and Description
boolean	canReplicateToSameCluster() Whether or not, the replication endpoint can replicate to it's source cluster with the same UUID
private void	checkCell(Cell cell)
protected void	doStart()
protected void	doStop()
UUID	getPeerUUID() Returns a UUID of the provided peer id.
WALEntryFilter	getWALEntryfilter() Returns a default set of filters
boolean	replicate(ReplicationEndpoint.ReplicateContext replicateContext) Replicate the given set of entries (in the context) to the other cluster.
void	start() Initiates service startup and returns immediately.
void	stop() If the service is starting or running, this initiates service shutdown and returns immediately.

Methods inherited from class org.apache.hadoop.hbase.replication.BaseReplicationEndpoint

getNamespaceTableCfWALEntryFilter, getScopeWALEntryFilter, init, isStarting, peerConfigUpdated

Methods inherited from class org.apache.hbase.thirdparty.com.google.common.util.concurrent.AbstractService

addListener, awaitRunning, awaitRunning, awaitRunning, awaitTerminated, awaitTerminated, awaitTerminated, doCancelStart, failureCause, isRunning, notifyFailed, notifyStarted, notifyStopped, startAsync, state, stopAsync, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.hadoop.hbase.replication.ReplicationEndpoint

awaitRunning, awaitRunning, awaitTerminated, awaitTerminated, failureCause, isRunning

Constructor Detail

VerifyWALEntriesReplicationEndpoint

public VerifyWALEntriesReplicationEndpoint()

Method Detail

canReplicateToSameCluster

public boolean canReplicateToSameCluster()

Description copied from interface: ReplicationEndpoint

Whether or not, the replication endpoint can replicate to it's source cluster with the same UUID

Specified by:

canReplicateToSameCluster in interface ReplicationEndpoint

Overrides:

canReplicateToSameCluster in class BaseReplicationEndpoint

getPeerUUID

public UUID getPeerUUID()

Description copied from interface: ReplicationEndpoint

Returns a UUID of the provided peer id. Every HBase cluster instance has a persisted associated UUID. If the replication is not performed to an actual HBase cluster (but some other system), the UUID returned has to uniquely identify the connected target system.

Returns:

a UUID or null if the peer cluster does not exist or is not connected.

getWALEntryfilter

public WALEntryFilter getWALEntryfilter()

Description copied from class: BaseReplicationEndpoint

Returns a default set of filters

Specified by:

getWALEntryfilter in interface ReplicationEndpoint

Overrides:

getWALEntryfilter in class BaseReplicationEndpoint

Returns:

a WALEntryFilter or null.

checkCell

private void checkCell(Cell cell)

replicate

public boolean replicate(ReplicationEndpoint.ReplicateContext replicateContext)

Description copied from interface: ReplicationEndpoint

Replicate the given set of entries (in the context) to the other cluster. Can block until all the given entries are replicated. Upon this method is returned, all entries that were passed in the context are assumed to be persisted in the target cluster.

Parameters:

replicateContext - a context where WAL entries and other parameters can be obtained.

start

public void start()

Description copied from interface: ReplicationEndpoint

Initiates service startup and returns immediately. A stopped service may not be restarted. Equivalent of startAsync call in Guava Service.

stop

public void stop()

Description copied from interface: ReplicationEndpoint

If the service is starting or running, this initiates service shutdown and returns immediately. If the service has already been stopped, this method returns immediately without taking action. Equivalent of stopAsync call in Guava Service.

doStart

protected void doStart()

Specified by:

doStart in class org.apache.hbase.thirdparty.com.google.common.util.concurrent.AbstractService

doStop

protected void doStop()

Specified by:

doStop in class org.apache.hbase.thirdparty.com.google.common.util.concurrent.AbstractService