org.apache.hadoop.hbase.client

Class ClientSideRegionScanner

java.lang.Object

org.apache.hadoop.hbase.client.AbstractClientScanner

org.apache.hadoop.hbase.client.ClientSideRegionScanner

All Implemented Interfaces:

Closeable, AutoCloseable, Iterable<Result>, ResultScanner

@InterfaceAudience.Private
public class ClientSideRegionScanner
extends AbstractClientScanner

A client scanner for a region opened for read-only on the client side. Assumes region data is not changing.

Field Summary

Fields inherited from class org.apache.hadoop.hbase.client.AbstractClientScanner

scanMetrics

Constructor Summary

Constructors

Constructor and Description
ClientSideRegionScanner(org.apache.hadoop.conf.Configuration conf, org.apache.hadoop.fs.FileSystem fs, org.apache.hadoop.fs.Path rootDir, HTableDescriptor htd, HRegionInfo hri, Scan scan, ScanMetrics scanMetrics)

Method Summary

Methods

Modifier and Type	Method and Description
void	close() Closes the scanner and releases any resources it has allocated
Result	next() Grab the next row's worth of values.
boolean	renewLease() Allow the client to renew the scanner's lease on the server.

Methods inherited from class org.apache.hadoop.hbase.client.AbstractClientScanner

getScanMetrics, initScanMetrics, iterator, next

Methods inherited from class java.lang.Object

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

Constructor Detail

ClientSideRegionScanner

public ClientSideRegionScanner(org.apache.hadoop.conf.Configuration conf,
                       org.apache.hadoop.fs.FileSystem fs,
                       org.apache.hadoop.fs.Path rootDir,
                       HTableDescriptor htd,
                       HRegionInfo hri,
                       Scan scan,
                       ScanMetrics scanMetrics)
                        throws IOException

Throws:

IOException

Method Detail

next

public Result next()
            throws IOException

Description copied from interface: ResultScanner

Grab the next row's worth of values. The scanner will return a Result.

Returns:

Result object if there is another row, null if the scanner is exhausted.

Throws:

IOException - e

close

public void close()

Description copied from interface: ResultScanner

Closes the scanner and releases any resources it has allocated

renewLease

public boolean renewLease()

Description copied from class: AbstractClientScanner

Allow the client to renew the scanner's lease on the server.

Specified by:

renewLease in class AbstractClientScanner

Returns:

true if the lease was successfully renewed, false otherwise.