org.apache.hadoop.hbase.constraint

Class ConstraintProcessor

java.lang.Object

org.apache.hadoop.hbase.coprocessor.BaseRegionObserver

org.apache.hadoop.hbase.constraint.ConstraintProcessor

All Implemented Interfaces:

Coprocessor, RegionObserver

@InterfaceAudience.Private
public class ConstraintProcessor
extends BaseRegionObserver

Processes multiple Constraints on a given table.

This is an ease of use mechanism - all the functionality here could be implemented on any given system by a coprocessor.

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

PRIORITY_HIGHEST, PRIORITY_LOWEST, PRIORITY_SYSTEM, PRIORITY_USER, VERSION

Constructor Summary

Constructors

Constructor and Description
ConstraintProcessor() Create the constraint processor.

Method Summary

Methods

Modifier and Type	Method and Description
void	prePut(ObserverContext<RegionCoprocessorEnvironment> e, Put put, WALEdit edit, Durability durability) Called before the client stores a value.
void	start(CoprocessorEnvironment environment)

Methods inherited from class org.apache.hadoop.hbase.coprocessor.BaseRegionObserver

postAppend, postBatchMutate, postBatchMutateIndispensably, postBulkLoadHFile, postCheckAndDelete, postCheckAndPut, postClose, postCloseRegionOperation, postCompact, postCompact, postCompactSelection, postCompactSelection, postCompleteSplit, postDelete, postExists, postFlush, postFlush, postGet, postGetClosestRowBefore, postGetOp, postIncrement, postIncrementColumnValue, postInstantiateDeleteTracker, postLogReplay, postMutationBeforeWAL, postOpen, postPut, postRollBackSplit, postScannerClose, postScannerFilterRow, postScannerNext, postScannerOpen, postSplit, postStartRegionOperation, postStoreFileReaderOpen, postWALRestore, preAppend, preAppendAfterRowLock, preBatchMutate, preBulkLoadHFile, preCheckAndDelete, preCheckAndDeleteAfterRowLock, preCheckAndPut, preCheckAndPutAfterRowLock, preClose, preCompact, preCompact, preCompactScannerOpen, preCompactScannerOpen, preCompactSelection, preCompactSelection, preDelete, preExists, preFlush, preFlush, preFlushScannerOpen, preGet, preGetClosestRowBefore, preGetOp, preIncrement, preIncrementAfterRowLock, preIncrementColumnValue, preOpen, prePrepareTimeStampForDeleteVersion, preRollBackSplit, preScannerClose, preScannerNext, preScannerOpen, preSplit, preSplit, preSplitAfterPONR, preSplitBeforePONR, preStoreFileReaderOpen, preStoreScannerOpen, preWALRestore, stop

Methods inherited from class java.lang.Object

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

Constructor Detail

ConstraintProcessor

public ConstraintProcessor()

Create the constraint processor.

Stores the current classloader.

Method Detail

start

public void start(CoprocessorEnvironment environment)

Specified by:

start in interface Coprocessor

Overrides:

start in class BaseRegionObserver

prePut

public void prePut(ObserverContext<RegionCoprocessorEnvironment> e,
          Put put,
          WALEdit edit,
          Durability durability)
            throws IOException

Description copied from interface: RegionObserver

Called before the client stores a value.

Call CoprocessorEnvironment#bypass to skip default actions

Call CoprocessorEnvironment#complete to skip any subsequent chained coprocessors

Specified by:

prePut in interface RegionObserver

Overrides:

prePut in class BaseRegionObserver

Parameters:

e - the environment provided by the region server

put - The Put object

edit - The WALEdit object that will be written to the wal

durability - Persistence guarantee for this Put

Throws:

IOException - if an error occurred on the coprocessor