org.apache.hadoop.hbase.coprocessor.example

Class ValueRewritingObserver

java.lang.Object

org.apache.hadoop.hbase.coprocessor.example.ValueRewritingObserver

All Implemented Interfaces:

Coprocessor, RegionCoprocessor, RegionObserver

@InterfaceAudience.Private
public class ValueRewritingObserver
extends Object
implements RegionObserver, RegionCoprocessor

This RegionObserver replaces the values of Puts from one value to another on compaction.

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.hadoop.hbase.coprocessor.RegionObserver

RegionObserver.MutationType

Nested classes/interfaces inherited from interface org.apache.hadoop.hbase.Coprocessor

Coprocessor.State

Field Summary

Fields

Modifier and Type	Field and Description
static String	ORIGINAL_VALUE_KEY
static String	REPLACED_VALUE_KEY

Fields inherited from interface org.apache.hadoop.hbase.Coprocessor

PRIORITY_HIGHEST, PRIORITY_LOWEST, PRIORITY_SYSTEM, PRIORITY_USER, VERSION

Constructor Summary

Constructors

Constructor and Description
ValueRewritingObserver()

Method Summary

Modifier and Type	Method and Description
Optional<RegionObserver>	getRegionObserver()
InternalScanner	preCompact(ObserverContext<RegionCoprocessorEnvironment> c, Store store, InternalScanner scanner, ScanType scanType, CompactionLifeCycleTracker tracker, CompactionRequest request)
void	start(CoprocessorEnvironment env)

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.hadoop.hbase.coprocessor.RegionObserver

postAppend, postAppend, postAppendBeforeWAL, postBatchMutate, postBatchMutateIndispensably, postBulkLoadHFile, postCheckAndDelete, postCheckAndDelete, postCheckAndMutate, postCheckAndPut, postCheckAndPut, postClose, postCloseRegionOperation, postCommitStoreFile, postCompact, postCompactSelection, postDelete, postDelete, postExists, postFlush, postFlush, postGetOp, postIncrement, postIncrement, postIncrementBeforeWAL, postInstantiateDeleteTracker, postMemStoreCompaction, postMutationBeforeWAL, postOpen, postPut, postPut, postReplayWALs, postScannerClose, postScannerFilterRow, postScannerNext, postScannerOpen, postStartRegionOperation, postStoreFileReaderOpen, postWALRestore, preAppend, preAppend, preAppendAfterRowLock, preBatchMutate, preBulkLoadHFile, preCheckAndDelete, preCheckAndDelete, preCheckAndDeleteAfterRowLock, preCheckAndDeleteAfterRowLock, preCheckAndMutate, preCheckAndMutateAfterRowLock, preCheckAndPut, preCheckAndPut, preCheckAndPutAfterRowLock, preCheckAndPutAfterRowLock, preClose, preCommitStoreFile, preCompactScannerOpen, preCompactSelection, preDelete, preDelete, preExists, preFlush, preFlush, preFlushScannerOpen, preGetOp, preIncrement, preIncrement, preIncrementAfterRowLock, preMemStoreCompaction, preMemStoreCompactionCompact, preMemStoreCompactionCompactScannerOpen, preOpen, prePrepareTimeStampForDeleteVersion, prePut, prePut, preReplayWALs, preScannerClose, preScannerNext, preScannerOpen, preStoreFileReaderOpen, preStoreScannerOpen, preWALAppend, preWALRestore

Methods inherited from interface org.apache.hadoop.hbase.coprocessor.RegionCoprocessor

getBulkLoadObserver, getEndpointObserver

Methods inherited from interface org.apache.hadoop.hbase.Coprocessor

getServices, stop

Field Detail

ORIGINAL_VALUE_KEY

public static final String ORIGINAL_VALUE_KEY

See Also:

Constant Field Values

REPLACED_VALUE_KEY

public static final String REPLACED_VALUE_KEY

See Also:

Constant Field Values

Constructor Detail

ValueRewritingObserver

public ValueRewritingObserver()

Method Detail

getRegionObserver

public Optional<RegionObserver> getRegionObserver()

Specified by:

getRegionObserver in interface RegionCoprocessor

start

public void start(CoprocessorEnvironment env)
           throws IOException

Specified by:

start in interface Coprocessor

Throws:

IOException

preCompact

public InternalScanner preCompact(ObserverContext<RegionCoprocessorEnvironment> c,
                                  Store store,
                                  InternalScanner scanner,
                                  ScanType scanType,
                                  CompactionLifeCycleTracker tracker,
                                  CompactionRequest request)

Specified by:

preCompact in interface RegionObserver