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
 @InterfaceStability.Stable
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, ClusterConnection connection)

方法概要

限定符和类型	方法和说明
void	close()
List<HRegionLocation>	getAllRegionLocations() Retrieves all of the regions associated with this table.
org.apache.hadoop.conf.Configuration	getConfiguration()
byte[][]	getEndKeys() Gets the ending row key for every region in the currently open table.
TableName	getName() Gets the fully qualified table name instance of this table.
HRegionLocation	getRegionLocation(byte[] row) Finds the region on which the given row is being served.
HRegionLocation	getRegionLocation(byte[] row, boolean reload) Finds the region on which the given row is being served.
Pair<byte[][],byte[][]>	getStartEndKeys() Gets the starting and ending row keys for every region in the currently open table.
byte[][]	getStartKeys() Gets the starting row key for every region in the currently open table.

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

HRegionLocator

public HRegionLocator(TableName tableName,
                      ClusterConnection 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)
                                  throws IOException

Finds the region on which the given row is being served. Does not reload the cache.

指定者:

getRegionLocation 在接口中 RegionLocator

参数:

row - Row to find.

返回:

Location of the row.

抛出:

IOException - if a remote or network exception occurs

getRegionLocation

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

Finds the region on which the given row is being served.

指定者:

getRegionLocation 在接口中 RegionLocator

参数:

row - Row to find.

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

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.

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

getStartKeys

public byte[][] getStartKeys()
                      throws IOException

Gets the starting row key for every region in the currently open table.

This is mainly useful for the MapReduce integration.

指定者:

getStartKeys 在接口中 RegionLocator

返回:

Array of region starting row keys

抛出:

IOException - if a remote or network exception occurs

getEndKeys

public byte[][] getEndKeys()
                    throws IOException

Gets the ending row key for every region in the currently open table.

This is mainly useful for the MapReduce integration.

指定者:

getEndKeys 在接口中 RegionLocator

返回:

Array of region ending row keys

抛出:

IOException - if a remote or network exception occurs

getStartEndKeys

public Pair<byte[][],byte[][]> getStartEndKeys()
                                        throws IOException

Gets the starting and ending row keys for every region in the currently open table.

This is mainly useful for the MapReduce integration.

指定者:

getStartEndKeys 在接口中 RegionLocator

返回:

Pair of arrays of region starting and ending row keys

抛出:

IOException - if a remote or network exception occurs

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

getConfiguration

public org.apache.hadoop.conf.Configuration getConfiguration()