org.apache.hadoop.hbase.coordination

类 ZkRegionMergeCoordination

java.lang.Object

org.apache.hadoop.hbase.coordination.ZkRegionMergeCoordination

所有已实现的接口:

RegionMergeCoordination

public class ZkRegionMergeCoordination
extends Object
implements RegionMergeCoordination

嵌套类概要

嵌套类

限定符和类型	类和说明
static class	ZkRegionMergeCoordination.ZkRegionMergeDetails ZK-based implementation.

从接口继承的嵌套类/接口 org.apache.hadoop.hbase.coordination.RegionMergeCoordination

RegionMergeCoordination.RegionMergeDetails

构造器概要

构造器

构造器和说明
ZkRegionMergeCoordination(CoordinatedStateManager manager, ZooKeeperWatcher watcher)

方法概要

方法

限定符和类型	方法和说明
void	clean(HRegionInfo hri) This method is used during rollback
void	completeRegionMergeTransaction(RegionServerServices services, HRegionInfo mergedRegionInfo, HRegion region_a, HRegion region_b, RegionMergeCoordination.RegionMergeDetails rmd, HRegion mergedRegion) Finish off merge transaction
void	confirmRegionMergeTransaction(HRegionInfo merged, HRegionInfo a, HRegionInfo b, ServerName serverName, RegionMergeCoordination.RegionMergeDetails rmd) Confirm that the region merge can be performed
RegionMergeCoordination.RegionMergeDetails	getDefaultDetails()
void	processRegionMergeRequest(HRegionInfo p, HRegionInfo hri_a, HRegionInfo hri_b, ServerName sn, RegionMergeCoordination.RegionMergeDetails rmd)
void	startRegionMergeTransaction(HRegionInfo region, ServerName serverName, HRegionInfo a, HRegionInfo b) Creates a new ephemeral node in the PENDING_MERGE state for the merged region.
void	waitForRegionMergeTransaction(RegionServerServices services, HRegionInfo mergedRegionInfo, HRegion region_a, HRegion region_b, RegionMergeCoordination.RegionMergeDetails details) Wait for the merging node to be transitioned from pending_merge to merging by master.

从类继承的方法 java.lang.Object

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

构造器详细资料

ZkRegionMergeCoordination

public ZkRegionMergeCoordination(CoordinatedStateManager manager,
                         ZooKeeperWatcher watcher)

方法详细资料

getDefaultDetails

public RegionMergeCoordination.RegionMergeDetails getDefaultDetails()

指定者:

getDefaultDetails 在接口中 RegionMergeCoordination

waitForRegionMergeTransaction

public void waitForRegionMergeTransaction(RegionServerServices services,
                                 HRegionInfo mergedRegionInfo,
                                 HRegion region_a,
                                 HRegion region_b,
                                 RegionMergeCoordination.RegionMergeDetails details)
                                   throws IOException

Wait for the merging node to be transitioned from pending_merge to merging by master. That's how we are sure master has processed the event and is good with us to move on. If we don't get any update, we periodically transition the node so that master gets the callback. If the node is removed or is not in pending_merge state any more, we abort the merge.

指定者:

waitForRegionMergeTransaction 在接口中 RegionMergeCoordination

抛出:

IOException

startRegionMergeTransaction

public void startRegionMergeTransaction(HRegionInfo region,
                               ServerName serverName,
                               HRegionInfo a,
                               HRegionInfo b)
                                 throws IOException

Creates a new ephemeral node in the PENDING_MERGE state for the merged region. Create it ephemeral in case regionserver dies mid-merge.

Does not transition nodes from other states. If a node already exists for this region, a KeeperException.NodeExistsException will be thrown.

指定者:

startRegionMergeTransaction 在接口中 RegionMergeCoordination

参数:

region - region to be created as offline

serverName - server event originates from

抛出:

IOException

clean

public void clean(HRegionInfo hri)

从接口复制的说明: RegionMergeCoordination

This method is used during rollback

指定者:

clean 在接口中 RegionMergeCoordination

参数:

hri - region to be rolled back

completeRegionMergeTransaction

public void completeRegionMergeTransaction(RegionServerServices services,
                                  HRegionInfo mergedRegionInfo,
                                  HRegion region_a,
                                  HRegion region_b,
                                  RegionMergeCoordination.RegionMergeDetails rmd,
                                  HRegion mergedRegion)
                                    throws IOException

从接口复制的说明: RegionMergeCoordination

Finish off merge transaction

指定者:

completeRegionMergeTransaction 在接口中 RegionMergeCoordination

参数:

services - Used to online/offline regions.

mergedRegionInfo - region

region_a - merging region A

region_b - merging region B

rmd - region merge details

抛出:

IOException - If thrown, transaction failed. Call RegionMergeTransaction.rollback( Server, RegionServerServices)

confirmRegionMergeTransaction

public void confirmRegionMergeTransaction(HRegionInfo merged,
                                 HRegionInfo a,
                                 HRegionInfo b,
                                 ServerName serverName,
                                 RegionMergeCoordination.RegionMergeDetails rmd)
                                   throws IOException

从接口复制的说明: RegionMergeCoordination

Confirm that the region merge can be performed

指定者:

confirmRegionMergeTransaction 在接口中 RegionMergeCoordination

参数:

merged - region

a - merging region A

b - merging region B

serverName - server event originates from

rmd - region merge details

抛出:

IOException - If thrown, transaction failed.

processRegionMergeRequest

public void processRegionMergeRequest(HRegionInfo p,
                             HRegionInfo hri_a,
                             HRegionInfo hri_b,
                             ServerName sn,
                             RegionMergeCoordination.RegionMergeDetails rmd)
                               throws IOException

指定者:

processRegionMergeRequest 在接口中 RegionMergeCoordination

参数:

p - region

hri_a - merging region A

hri_b - merging region B

sn - server event originates from

rmd - region merge details

抛出:

IOException