org.apache.hadoop.hbase.catalog
Class MetaEditor

java.lang.Object
  org.apache.hadoop.hbase.catalog.MetaEditor

public class MetaEditor
extends java.lang.Object

Writes region and assignment information to .META..

Uses the CatalogTracker to obtain locations and connections to catalogs.

Constructor Summary

MetaEditor()

Method Summary

static void	addDaughter(CatalogTracker catalogTracker, HRegionInfo regionInfo, HServerInfo serverInfo)
static void	addRegionToMeta(CatalogTracker catalogTracker, HRegionInfo regionInfo) Adds a META row for the specified new region.
static void	deleteDaughterReferenceInParent(CatalogTracker catalogTracker, HRegionInfo parent, byte[] qualifier, HRegionInfo daughter) Deletes daughter reference in offlined split parent.
static void	deleteRegion(CatalogTracker catalogTracker, HRegionInfo regionInfo) Deletes the specified region from META.
static void	offlineParentInMeta(CatalogTracker catalogTracker, HRegionInfo parent, HRegionInfo a, HRegionInfo b) Offline parent in meta.
static void	updateMetaLocation(CatalogTracker catalogTracker, HRegionInfo regionInfo, HServerInfo serverInfo) Updates the location of the specified META region in ROOT to be the specified server hostname and startcode.
static void	updateRegionInfo(CatalogTracker catalogTracker, HRegionInfo regionInfo) Updates the region information for the specified region in META.
static void	updateRegionLocation(CatalogTracker catalogTracker, HRegionInfo regionInfo, HServerInfo serverInfo) Updates the location of the specified region in META to be the specified server hostname and startcode.

Methods inherited from class java.lang.Object

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

Constructor Detail

MetaEditor

public MetaEditor()

Method Detail

addRegionToMeta

public static void addRegionToMeta(CatalogTracker catalogTracker,
                                   HRegionInfo regionInfo)
                            throws java.io.IOException

Adds a META row for the specified new region.

Parameters:

regionInfo - region information

Throws:

java.io.IOException - if problem connecting or updating meta

offlineParentInMeta

public static void offlineParentInMeta(CatalogTracker catalogTracker,
                                       HRegionInfo parent,
                                       HRegionInfo a,
                                       HRegionInfo b)
                                throws NotAllMetaRegionsOnlineException,
                                       java.io.IOException

Offline parent in meta. Used when splitting.

Parameters:

catalogTracker -

parent -

a - Split daughter region A

b - Split daughter region B

Throws:

NotAllMetaRegionsOnlineException

java.io.IOException

addDaughter

public static void addDaughter(CatalogTracker catalogTracker,
                               HRegionInfo regionInfo,
                               HServerInfo serverInfo)
                        throws NotAllMetaRegionsOnlineException,
                               java.io.IOException

Throws:

NotAllMetaRegionsOnlineException

java.io.IOException

updateMetaLocation

public static void updateMetaLocation(CatalogTracker catalogTracker,
                                      HRegionInfo regionInfo,
                                      HServerInfo serverInfo)
                               throws java.io.IOException,
                                      java.net.ConnectException

Updates the location of the specified META region in ROOT to be the specified server hostname and startcode.

Uses passed catalog tracker to get a connection to the server hosting ROOT and makes edits to that region.

Parameters:

catalogTracker - catalog tracker

regionInfo - region to update location of

serverInfo - server the region is located on

Throws:

java.io.IOException

java.net.ConnectException - Usually because the regionserver carrying .META. is down.

java.lang.NullPointerException - Because no -ROOT- server connection

updateRegionLocation

public static void updateRegionLocation(CatalogTracker catalogTracker,
                                        HRegionInfo regionInfo,
                                        HServerInfo serverInfo)
                                 throws java.io.IOException

Updates the location of the specified region in META to be the specified server hostname and startcode.

Uses passed catalog tracker to get a connection to the server hosting META and makes edits to that region.

Parameters:

catalogTracker - catalog tracker

regionInfo - region to update location of

serverInfo - server the region is located on

Throws:

java.io.IOException

deleteRegion

public static void deleteRegion(CatalogTracker catalogTracker,
                                HRegionInfo regionInfo)
                         throws java.io.IOException

Deletes the specified region from META.

Parameters:

catalogTracker -

regionInfo - region to be deleted from META

Throws:

java.io.IOException

deleteDaughterReferenceInParent

public static void deleteDaughterReferenceInParent(CatalogTracker catalogTracker,
                                                   HRegionInfo parent,
                                                   byte[] qualifier,
                                                   HRegionInfo daughter)
                                            throws NotAllMetaRegionsOnlineException,
                                                   java.io.IOException

Deletes daughter reference in offlined split parent.

Parameters:

catalogTracker -

parent - Parent row we're to remove daughter reference from

qualifier - SplitA or SplitB daughter to remove

daughter -

Throws:

NotAllMetaRegionsOnlineException

java.io.IOException

updateRegionInfo

public static void updateRegionInfo(CatalogTracker catalogTracker,
                                    HRegionInfo regionInfo)
                             throws java.io.IOException

Updates the region information for the specified region in META.

Parameters:

catalogTracker -

regionInfo - region to be updated in META

Throws:

java.io.IOException