org.apache.hadoop.hbase.coprocessor.example

Class BulkDeleteEndpoint

java.lang.Object

org.apache.hadoop.hbase.coprocessor.example.generated.BulkDeleteProtos.BulkDeleteService

org.apache.hadoop.hbase.coprocessor.example.BulkDeleteEndpoint

All Implemented Interfaces:

com.google.protobuf.Service, Coprocessor, RegionCoprocessor

@InterfaceAudience.Private
public class BulkDeleteEndpoint
extends org.apache.hadoop.hbase.coprocessor.example.generated.BulkDeleteProtos.BulkDeleteService
implements RegionCoprocessor

Defines a protocol to delete data in bulk based on a scan. The scan can be range scan or with conditions(filters) etc.This can be used to delete rows, column family(s), column qualifier(s) or version(s) of columns.When delete type is FAMILY or COLUMN, which all family(s) or column(s) getting deleted will be determined by the Scan. Scan need to select all the families/qualifiers which need to be deleted.When delete type is VERSION, Which column(s) and version(s) to be deleted will be determined by the Scan. Scan need to select all the qualifiers and its versions which needs to be deleted.When a timestamp is passed only one version at that timestamp will be deleted(even if Scan fetches many versions). When timestamp passed as null, all the versions which the Scan selects will get deleted.
Example:

 Scan scan = new Scan();
 // set scan properties(rowkey range, filters, timerange etc).
 HTable ht = ...;
 long noOfDeletedRows = 0L;
 Batch.Call<BulkDeleteService, BulkDeleteResponse> callable =
     new Batch.Call<BulkDeleteService, BulkDeleteResponse>() {
   ServerRpcController controller = new ServerRpcController();
   BlockingRpcCallback<BulkDeleteResponse> rpcCallback =
     new BlockingRpcCallback<BulkDeleteResponse>();

   public BulkDeleteResponse call(BulkDeleteService service) throws IOException {
     Builder builder = BulkDeleteRequest.newBuilder();
     builder.setScan(ProtobufUtil.toScan(scan));
     builder.setDeleteType(DeleteType.VERSION);
     builder.setRowBatchSize(rowBatchSize);
     // Set optional timestamp if needed
     builder.setTimestamp(timeStamp);
     service.delete(controller, builder.build(), rpcCallback);
     return rpcCallback.get();
   }
 };
 Map<byte[], BulkDeleteResponse> result = ht.coprocessorService(BulkDeleteService.class,
  scan.getStartRow(), scan.getStopRow(), callable);
 for (BulkDeleteResponse response : result.values()) {
   noOfDeletedRows += response.getRowsDeleted();
 }
 

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
private static class	BulkDeleteEndpoint.Column

Nested classes/interfaces inherited from class org.apache.hadoop.hbase.coprocessor.example.generated.BulkDeleteProtos.BulkDeleteService

org.apache.hadoop.hbase.coprocessor.example.generated.BulkDeleteProtos.BulkDeleteService.BlockingInterface, org.apache.hadoop.hbase.coprocessor.example.generated.BulkDeleteProtos.BulkDeleteService.Interface, org.apache.hadoop.hbase.coprocessor.example.generated.BulkDeleteProtos.BulkDeleteService.Stub

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

Coprocessor.State

Field Summary

Fields

Modifier and Type	Field and Description
private RegionCoprocessorEnvironment	env
private static org.slf4j.Logger	LOG
private static String	NO_OF_VERSIONS_TO_DELETE

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

PRIORITY_HIGHEST, PRIORITY_LOWEST, PRIORITY_SYSTEM, PRIORITY_USER, VERSION

Constructor Summary

Constructors

Constructor and Description
BulkDeleteEndpoint()

Method Summary

Modifier and Type	Method and Description
private Delete	createDeleteMutation(List<Cell> deleteRow, org.apache.hadoop.hbase.coprocessor.example.generated.BulkDeleteProtos.BulkDeleteRequest.DeleteType deleteType, Long timestamp)
void	delete(com.google.protobuf.RpcController controller, org.apache.hadoop.hbase.coprocessor.example.generated.BulkDeleteProtos.BulkDeleteRequest request, com.google.protobuf.RpcCallback<org.apache.hadoop.hbase.coprocessor.example.generated.BulkDeleteProtos.BulkDeleteResponse> done)
Iterable<com.google.protobuf.Service>	getServices() Coprocessor endpoints providing protobuf services should override this method.
void	start(CoprocessorEnvironment env) Called by the CoprocessorEnvironment during it's own startup to initialize the coprocessor.
void	stop(CoprocessorEnvironment env) Called by the CoprocessorEnvironment during it's own shutdown to stop the coprocessor.

Methods inherited from class org.apache.hadoop.hbase.coprocessor.example.generated.BulkDeleteProtos.BulkDeleteService

callMethod, getDescriptor, getDescriptorForType, getRequestPrototype, getResponsePrototype, newBlockingStub, newReflectiveBlockingService, newReflectiveService, newStub

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.RegionCoprocessor

getBulkLoadObserver, getEndpointObserver, getRegionObserver

Field Detail

NO_OF_VERSIONS_TO_DELETE

private static final String NO_OF_VERSIONS_TO_DELETE

See Also:

Constant Field Values

LOG

private static final org.slf4j.Logger LOG

env

private RegionCoprocessorEnvironment env

Constructor Detail

BulkDeleteEndpoint

public BulkDeleteEndpoint()

Method Detail

getServices

public Iterable<com.google.protobuf.Service> getServices()

Description copied from interface: Coprocessor

Coprocessor endpoints providing protobuf services should override this method.

Specified by:

getServices in interface Coprocessor

Returns:

Iterable of Services or empty collection. Implementations should never return null.

delete

public void delete(com.google.protobuf.RpcController controller,
                   org.apache.hadoop.hbase.coprocessor.example.generated.BulkDeleteProtos.BulkDeleteRequest request,
                   com.google.protobuf.RpcCallback<org.apache.hadoop.hbase.coprocessor.example.generated.BulkDeleteProtos.BulkDeleteResponse> done)

Specified by:

delete in class org.apache.hadoop.hbase.coprocessor.example.generated.BulkDeleteProtos.BulkDeleteService

createDeleteMutation

private Delete createDeleteMutation(List<Cell> deleteRow,
                                    org.apache.hadoop.hbase.coprocessor.example.generated.BulkDeleteProtos.BulkDeleteRequest.DeleteType deleteType,
                                    Long timestamp)

start

public void start(CoprocessorEnvironment env)
           throws IOException

Description copied from interface: Coprocessor

Called by the CoprocessorEnvironment during it's own startup to initialize the coprocessor.

Specified by:

start in interface Coprocessor

Throws:

IOException

stop

public void stop(CoprocessorEnvironment env)
          throws IOException

Description copied from interface: Coprocessor

Called by the CoprocessorEnvironment during it's own shutdown to stop the coprocessor.

Specified by:

stop in interface Coprocessor

Throws:

IOException