org.apache.hadoop.hbase.client

类 HRegionLocator

java.lang.Object

org.apache.hadoop.hbase.client.HRegionLocator

所有已实现的接口:

Closeable, AutoCloseable, RegionLocator

@InterfaceAudience.Private
public class HRegionLocator
extends Object
implements RegionLocator

An implementation of RegionLocator. Used to view region location information for a single HBase table. Lightweight. Get as needed and just close when done. Instances of this class SHOULD NOT be constructed directly. Obtain an instance via Connection. See ConnectionFactory class comment for an example of how.

This class is thread safe

构造器概要

构造器

构造器和说明
HRegionLocator(TableName tableName, org.apache.hadoop.hbase.client.ConnectionImplementation connection)

方法概要

限定符和类型	方法和说明
void	clearRegionLocationCache() Clear all the entries in the region location cache.
void	close()
List<HRegionLocation>	getAllRegionLocations() Retrieves all of the regions associated with this table.
TableName	getName() Gets the fully qualified table name instance of this table.
HRegionLocation	getRegionLocation(byte[] row, int replicaId, boolean reload) Finds the region with the given replica id on which the given row is being served.
List<HRegionLocation>	getRegionLocations(byte[] row, boolean reload) Find all the replicas for the region on which the given row is being served.

从类继承的方法 java.lang.Object

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

从接口继承的方法 org.apache.hadoop.hbase.client.RegionLocator

getEndKeys, getRegionLocation, getRegionLocation, getRegionLocation, getRegionLocations, getStartEndKeys, getStartKeys

构造器详细资料

HRegionLocator

public HRegionLocator(TableName tableName,
                      org.apache.hadoop.hbase.client.ConnectionImplementation connection)

方法详细资料

close

public void close()
           throws IOException

指定者:

close 在接口中 Closeable

指定者:

close 在接口中 AutoCloseable

抛出:

IOException

getRegionLocation

public HRegionLocation getRegionLocation(byte[] row,
                                         int replicaId,
                                         boolean reload)
                                  throws IOException

从接口复制的说明: RegionLocator

Finds the region with the given replica id on which the given row is being served.

指定者:

getRegionLocation 在接口中 RegionLocator

参数:

row - Row to find.

replicaId - the replica id

reload - true to reload information or false to use cached information

返回:

Location of the row.

抛出:

IOException - if a remote or network exception occurs

getRegionLocations

public List<HRegionLocation> getRegionLocations(byte[] row,
                                                boolean reload)
                                         throws IOException

从接口复制的说明: RegionLocator

Find all the replicas for the region on which the given row is being served.

指定者:

getRegionLocations 在接口中 RegionLocator

参数:

row - Row to find.

reload - true to reload information or false to use cached information

返回:

Locations for all the replicas of the row.

抛出:

IOException - if a remote or network exception occurs

getAllRegionLocations

public List<HRegionLocation> getAllRegionLocations()
                                            throws IOException

从接口复制的说明: RegionLocator

Retrieves all of the regions associated with this table.

Usually we will go to meta table directly in this method so there is no reload parameter.

Notice that the location for region replicas other than the default replica are also returned.

指定者:

getAllRegionLocations 在接口中 RegionLocator

返回:

a List of all regions associated with this table.

抛出:

IOException - if a remote or network exception occurs

clearRegionLocationCache

public void clearRegionLocationCache()

从接口复制的说明: RegionLocator

Clear all the entries in the region location cache.

This may cause performance issue so use it with caution.

指定者:

clearRegionLocationCache 在接口中 RegionLocator

getName

public TableName getName()

从接口复制的说明: RegionLocator

Gets the fully qualified table name instance of this table.

指定者:

getName 在接口中 RegionLocator