org.apache.hadoop.hbase.ipc

Class AsyncRpcClient

java.lang.Object

org.apache.hadoop.hbase.ipc.AsyncRpcClient

public class AsyncRpcClient
extends java.lang.Object

Netty client for the requests and responses

Field Summary

Fields

Modifier and Type	Field and Description
org.apache.hadoop.hbase.codec.Codec	codec
org.apache.hadoop.io.compress.CompressionCodec	compressor
protected org.apache.hadoop.conf.Configuration	configuration
org.apache.hadoop.hbase.ipc.IPCUtil	ipcUtil
static org.apache.commons.logging.Log	LOG
static io.netty.util.HashedWheelTimer	WHEEL_TIMER

Constructor Summary

Constructors

Constructor and Description
AsyncRpcClient(org.apache.hadoop.hbase.client.HConnection connection, java.lang.String clusterId, java.net.SocketAddress localAddress) Constructor

Method Summary

Methods

Modifier and Type	Method and Description
java.nio.ByteBuffer	buildCellBlock(org.apache.hadoop.hbase.CellScanner cells) Build cell block
void	cancelConnections(java.lang.String hostname, int port, java.io.IOException ioe) Interrupt the connections to the given ip:port server.
void	close() Close netty
org.apache.hadoop.hbase.CellScanner	createCellScanner(byte[] cellBlock) Create a cell scanner
org.apache.hadoop.hbase.protobuf.generated.ClientProtos.ClientService.Interface	getClientService(org.apache.hadoop.hbase.HRegionLocation location) Get the client service
org.apache.hadoop.conf.Configuration	getConfiguration() Get hbase configuration
AsyncRpcChannel	getConnection(com.google.protobuf.Descriptors.ServiceDescriptor serviceDescriptor, org.apache.hadoop.hbase.HRegionLocation location) Get a connection from the pool, or create a new one and add it to the pool.
io.netty.util.concurrent.EventExecutor	getEventLoop() Get an event loop
org.apache.hadoop.hbase.client.HConnection	getHConnection() Get the HConnection
org.apache.hadoop.hbase.client.NonceGenerator	getNonceGenerator() Get nonce generator
org.apache.hadoop.hbase.HRegionLocation	getRegionLocation(org.apache.hadoop.hbase.TableName table, byte[] row, boolean reload) Get region location
<T> AsyncPayloadCarryingRpcController	newRpcController(ResponseHandler<T> handler) Return an new RPC controller
void	removeConnection(org.apache.hadoop.hbase.ipc.RpcClient.ConnectionId remoteId) Remove connection from pool

Methods inherited from class java.lang.Object

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

Field Detail

LOG

public static final org.apache.commons.logging.Log LOG

configuration

protected final org.apache.hadoop.conf.Configuration configuration

ipcUtil

public final org.apache.hadoop.hbase.ipc.IPCUtil ipcUtil

codec

public final org.apache.hadoop.hbase.codec.Codec codec

compressor

public final org.apache.hadoop.io.compress.CompressionCodec compressor

WHEEL_TIMER

public static final io.netty.util.HashedWheelTimer WHEEL_TIMER

Constructor Detail

AsyncRpcClient

public AsyncRpcClient(org.apache.hadoop.hbase.client.HConnection connection,
              java.lang.String clusterId,
              java.net.SocketAddress localAddress)

Constructor

Parameters:

connection - to HBase

clusterId - for the cluster

localAddress - local address to connect to

Method Detail

close

public void close()

Close netty

getEventLoop

public io.netty.util.concurrent.EventExecutor getEventLoop()

Get an event loop

Returns:

event executor

createCellScanner

public org.apache.hadoop.hbase.CellScanner createCellScanner(byte[] cellBlock)
                                                      throws java.io.IOException

Create a cell scanner

Parameters:

cellBlock - to create scanner for

Returns:

CellScanner

Throws:

java.io.IOException - on error on creation cell scanner

buildCellBlock

public java.nio.ByteBuffer buildCellBlock(org.apache.hadoop.hbase.CellScanner cells)
                                   throws java.io.IOException

Build cell block

Parameters:

cells - to create block with

Returns:

ByteBuffer with cells

Throws:

java.io.IOException - if block creation fails

cancelConnections

public void cancelConnections(java.lang.String hostname,
                     int port,
                     java.io.IOException ioe)

Interrupt the connections to the given ip:port server. This should be called if the server is known as actually dead. This will not prevent current operation to be retried, and, depending on their own behavior, they may retry on the same server. This can be a feature, for example at startup. In any case, they're likely to get connection refused (if the process died) or no route to host: i.e. there next retries should be faster and with a safe exception.

Parameters:

hostname - to cancel connections for

port - to cancel connection for

ioe - exception which canceled connection

getConnection

public AsyncRpcChannel getConnection(com.google.protobuf.Descriptors.ServiceDescriptor serviceDescriptor,
                            org.apache.hadoop.hbase.HRegionLocation location)
                              throws java.io.IOException

Get a connection from the pool, or create a new one and add it to the pool. Connections to a given host/port are reused.

Parameters:

serviceDescriptor - to get connection for

location - to connect to

Returns:

Fitting NettyRpcChannel

Throws:

java.io.IOException - if connecting fails

removeConnection

public void removeConnection(org.apache.hadoop.hbase.ipc.RpcClient.ConnectionId remoteId)

Remove connection from pool

Parameters:

remoteId - of connection

getConfiguration

public org.apache.hadoop.conf.Configuration getConfiguration()

Get hbase configuration

Returns:

configuration

getRegionLocation

public org.apache.hadoop.hbase.HRegionLocation getRegionLocation(org.apache.hadoop.hbase.TableName table,
                                                        byte[] row,
                                                        boolean reload)
                                                          throws java.io.IOException

Get region location

Parameters:

table - to get location of

row - to get location of

reload -

Returns:

Region location

Throws:

java.io.IOException - if connection fetching fails

getNonceGenerator

public org.apache.hadoop.hbase.client.NonceGenerator getNonceGenerator()

Get nonce generator

Returns:

nonce generator

newRpcController

public <T> AsyncPayloadCarryingRpcController newRpcController(ResponseHandler<T> handler)

Return an new RPC controller

Type Parameters:

T - Type of Result returned

Parameters:

handler - for controller to run on errors

Returns:

new RpcController

getClientService

public org.apache.hadoop.hbase.protobuf.generated.ClientProtos.ClientService.Interface getClientService(org.apache.hadoop.hbase.HRegionLocation location)
                                                                                                 throws java.io.IOException

Get the client service

Parameters:

location - to get service of

Returns:

Service

Throws:

java.io.IOException - if service creation fails

getHConnection

public org.apache.hadoop.hbase.client.HConnection getHConnection()

Get the HConnection

Returns:

the HConnection