org.apache.hadoop.oncrpc
Class RpcProgram

java.lang.Object
  org.jboss.netty.channel.SimpleChannelUpstreamHandler
      org.apache.hadoop.oncrpc.RpcProgram

All Implemented Interfaces:

org.jboss.netty.channel.ChannelHandler, org.jboss.netty.channel.ChannelUpstreamHandler

public abstract class RpcProgram
extends org.jboss.netty.channel.SimpleChannelUpstreamHandler

Class for writing RPC server programs based on RFC 1050. Extend this class and implement handleInternal(org.jboss.netty.channel.ChannelHandlerContext, org.apache.hadoop.oncrpc.RpcInfo) to handle the requests received.

Nested Class Summary

Nested classes/interfaces inherited from interface org.jboss.netty.channel.ChannelHandler

org.jboss.netty.channel.ChannelHandler.Sharable

Field Summary

protected boolean	allowInsecurePorts
static int	RPCB_PORT

Constructor Summary

protected

RpcProgram(String program, String host, int port, int progNumber, int lowProgVersion, int highProgVersion, DatagramSocket registrationSocket, boolean allowInsecurePorts) Constructor

Method Summary

boolean	doPortMonitoring(SocketAddress remoteAddress)
int	getPort()
protected abstract void	handleInternal(org.jboss.netty.channel.ChannelHandlerContext ctx, RpcInfo info)
protected abstract boolean	isIdempotent(RpcCall call)
void	messageReceived(org.jboss.netty.channel.ChannelHandlerContext ctx, org.jboss.netty.channel.MessageEvent e)
void	register(int transport, int boundPort) Register this program with the local portmapper.
protected void	register(PortmapMapping mapEntry, boolean set) Register the program with Portmap or Rpcbind
protected static void	sendRejectedReply(RpcCall call, SocketAddress remoteAddress, org.jboss.netty.channel.ChannelHandlerContext ctx)
void	startDaemons()
void	stopDaemons()
String	toString()
void	unregister(int transport, int boundPort) Unregister this program with the local portmapper.

Methods inherited from class org.jboss.netty.channel.SimpleChannelUpstreamHandler

channelBound, channelClosed, channelConnected, channelDisconnected, channelInterestChanged, channelOpen, channelUnbound, childChannelClosed, childChannelOpen, exceptionCaught, handleUpstream, writeComplete

Methods inherited from class java.lang.Object

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

Field Detail

RPCB_PORT

public static final int RPCB_PORT

See Also:

Constant Field Values

allowInsecurePorts

protected final boolean allowInsecurePorts

Constructor Detail

RpcProgram

protected RpcProgram(String program,
                     String host,
                     int port,
                     int progNumber,
                     int lowProgVersion,
                     int highProgVersion,
                     DatagramSocket registrationSocket,
                     boolean allowInsecurePorts)

Constructor

Parameters:

program - program name

host - host where the Rpc server program is started

port - port where the Rpc server program is listening to

progNumber - program number as defined in RFC 1050

lowProgVersion - lowest version of the specification supported

highProgVersion - highest version of the specification supported

DatagramSocket - registrationSocket if not null, use this socket to register with portmap daemon

allowInsecurePorts - true to allow client connections from unprivileged ports, false otherwise

Method Detail

register

public void register(int transport,
                     int boundPort)

Register this program with the local portmapper.

unregister

public void unregister(int transport,
                       int boundPort)

Unregister this program with the local portmapper.

register

protected void register(PortmapMapping mapEntry,
                        boolean set)

Register the program with Portmap or Rpcbind

startDaemons

public void startDaemons()

stopDaemons

public void stopDaemons()

messageReceived

public void messageReceived(org.jboss.netty.channel.ChannelHandlerContext ctx,
                            org.jboss.netty.channel.MessageEvent e)
                     throws Exception

Overrides:

messageReceived in class org.jboss.netty.channel.SimpleChannelUpstreamHandler

Throws:

Exception

doPortMonitoring

public boolean doPortMonitoring(SocketAddress remoteAddress)

sendRejectedReply

protected static void sendRejectedReply(RpcCall call,
                                        SocketAddress remoteAddress,
                                        org.jboss.netty.channel.ChannelHandlerContext ctx)

handleInternal

protected abstract void handleInternal(org.jboss.netty.channel.ChannelHandlerContext ctx,
                                       RpcInfo info)

toString

public String toString()

Overrides:

toString in class Object

isIdempotent

protected abstract boolean isIdempotent(RpcCall call)

getPort

public int getPort()