org.apache.hadoop.hbase.regionserver

Class BaseRowProcessor<S extends Message,T extends Message>

java.lang.Object

org.apache.hadoop.hbase.regionserver.BaseRowProcessor<S,T>

All Implemented Interfaces:

RowProcessor<S,T>

@InterfaceAudience.LimitedPrivate(value="Coprocesssor")
@InterfaceStability.Evolving
public abstract class BaseRowProcessor<S extends Message,T extends Message>
extends Object
implements RowProcessor<S,T>

Base class for RowProcessor with some default implementations.

Constructor Summary

Constructors

Constructor and Description
BaseRowProcessor()

Method Summary

Methods

Modifier and Type	Method and Description
List<UUID>	getClusterIds()
String	getName() Human readable name of the processor
void	postBatchMutate(HRegion region) The hook to be executed after the process() and applying the Mutations to region.
void	postProcess(HRegion region, WALEdit walEdit, boolean success) The hook to be executed after process() and applying the Mutations to region.
void	preBatchMutate(HRegion region, WALEdit walEdit) The hook to be executed after the process() but before applying the Mutations to region.
void	preProcess(HRegion region, WALEdit walEdit) The hook to be executed before process().
Durability	useDurability()

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.regionserver.RowProcessor

getRequestData, getResult, getRowsToLock, initialize, process, readOnly

Constructor Detail

BaseRowProcessor

public BaseRowProcessor()

Method Detail

preProcess

public void preProcess(HRegion region,
              WALEdit walEdit)
                throws IOException

Description copied from interface: RowProcessor

The hook to be executed before process().

Specified by:

preProcess in interface RowProcessor<S extends Message,T extends Message>

Parameters:

region - the HRegion

walEdit - the output WAL edits to apply to write ahead log

Throws:

IOException

preBatchMutate

public void preBatchMutate(HRegion region,
                  WALEdit walEdit)
                    throws IOException

Description copied from interface: RowProcessor

The hook to be executed after the process() but before applying the Mutations to region. Also by the time this hook is been called, mvcc transaction is started.

Specified by:

preBatchMutate in interface RowProcessor<S extends Message,T extends Message>

walEdit - the output WAL edits to apply to write ahead log

Throws:

IOException

postBatchMutate

public void postBatchMutate(HRegion region)
                     throws IOException

Description copied from interface: RowProcessor

The hook to be executed after the process() and applying the Mutations to region. The difference of this one with RowProcessor.postProcess(HRegion, WALEdit, boolean) is this hook will be executed before the mvcc transaction completion.

Specified by:

postBatchMutate in interface RowProcessor<S extends Message,T extends Message>

Throws:

IOException

postProcess

public void postProcess(HRegion region,
               WALEdit walEdit,
               boolean success)
                 throws IOException

Description copied from interface: RowProcessor

The hook to be executed after process() and applying the Mutations to region.

Specified by:

postProcess in interface RowProcessor<S extends Message,T extends Message>

Parameters:

region - the HRegion

walEdit - the output WAL edits to apply to write ahead log

success - true if batch operation is successful otherwise false.

Throws:

IOException

getClusterIds

public List<UUID> getClusterIds()

Specified by:

getClusterIds in interface RowProcessor<S extends Message,T extends Message>

Returns:

The cluster ids that have the change.

getName

public String getName()

Description copied from interface: RowProcessor

Human readable name of the processor

Specified by:

getName in interface RowProcessor<S extends Message,T extends Message>

Returns:

The name of the processor

useDurability

public Durability useDurability()

Specified by:

useDurability in interface RowProcessor<S extends Message,T extends Message>

Returns:

The Durability to use