org.apache.hadoop.hbase.mapreduce
Class BufferedHTable

java.lang.Object
  org.apache.hadoop.hbase.client.HTable
      org.apache.hadoop.hbase.mapreduce.BufferedHTable

All Implemented Interfaces:

Closeable, HTableInterface

@InterfaceAudience.Private
public class BufferedHTable
extends HTable

Buffers writes for Deletes in addition to Puts. Buffering Deletes can significantly speed up MapReduce jobs. The order of both Mutation types is preserved in the write buffer, and a buffer flush can be triggered by either Put or Delete operations.

Field Summary

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

ap, connection, currentWriteBufferSize, scannerCaching, scannerMaxResultSize, writeAsyncBuffer

Constructor Summary

BufferedHTable(org.apache.hadoop.conf.Configuration conf, byte[] tableName)

BufferedHTable(org.apache.hadoop.conf.Configuration conf, String tableName)

Method Summary

void	close()
void	delete(Delete delete)
void	delete(List<Delete> deletes)

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

append, batch, batch, batchCallback, batchCallback, batchCoprocessorService, batchCoprocessorService, checkAndDelete, checkAndMutate, checkAndPut, clearRegionCache, coprocessorService, coprocessorService, coprocessorService, exists, exists, flushCommits, get, get, getConfiguration, getConnection, getDefaultExecutor, getEndKeys, getMaxKeyValueSize, getName, getOperationTimeout, getRegionCachePrefetch, getRegionCachePrefetch, getRegionCachePrefetch, getRegionCachePrefetch, getRegionLocation, getRegionLocation, getRegionLocation, getRegionLocations, getRegionsInRange, getRegionsInRange, getRowOrBefore, getScanner, getScanner, getScanner, getScannerCaching, getStartEndKeys, getStartKeys, getTableDescriptor, getTableName, getWriteBuffer, getWriteBufferSize, increment, incrementColumnValue, incrementColumnValue, incrementColumnValue, isAutoFlush, isTableEnabled, isTableEnabled, isTableEnabled, isTableEnabled, isTableEnabled, isTableEnabled, main, mutateRow, processBatch, processBatchCallback, put, put, setAutoFlush, setAutoFlush, setAutoFlushTo, setOperationTimeout, setRegionCachePrefetch, setRegionCachePrefetch, setRegionCachePrefetch, setRegionCachePrefetch, setScannerCaching, setWriteBufferSize, toString, validatePut, validatePut

Methods inherited from class java.lang.Object

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

Constructor Detail

BufferedHTable

public BufferedHTable(org.apache.hadoop.conf.Configuration conf,
                      String tableName)
               throws IOException

Throws:

IOException

BufferedHTable

public BufferedHTable(org.apache.hadoop.conf.Configuration conf,
                      byte[] tableName)
               throws IOException

Throws:

IOException

Method Detail

delete

public void delete(Delete delete)
            throws IOException

Specified by:

delete in interface HTableInterface

Overrides:

delete in class HTable

Throws:

IOException

delete

public void delete(List<Delete> deletes)
            throws IOException

Specified by:

delete in interface HTableInterface

Overrides:

delete in class HTable

Throws:

IOException

close

public void close()
           throws IOException

Specified by:

close in interface Closeable

Specified by:

close in interface HTableInterface

Overrides:

close in class HTable

Throws:

IOException