org.apache.drill.exec.rpc

Interface RequestHandler<S extends ServerConnection<S>>

Type Parameters:

S - server connection type

All Known Implementing Classes:

ControlMessageHandler, FailingRequestHandler, ServerAuthenticationHandler

public interface RequestHandler<S extends ServerConnection<S>>

Note that if a handler maintains any internal state, the state will be disposed if the handler on the connection changes. So handler should not maintain state.

Method Summary

Modifier and Type	Method and Description
void	handle(S connection, int rpcType, io.netty.buffer.ByteBuf pBody, io.netty.buffer.ByteBuf dBody, ResponseSender sender) Handle request of given type (rpcType) with message (pBody) and optional data (dBody) on the connection, and return the appropriate response.

Method Detail

handle

void handle(S connection,
            int rpcType,
            io.netty.buffer.ByteBuf pBody,
            io.netty.buffer.ByteBuf dBody,
            ResponseSender sender)
     throws RpcException

Handle request of given type (rpcType) with message (pBody) and optional data (dBody) on the connection, and return the appropriate response. The method must do one of three things: + use send the response + throw UserRpcException, in which case a response will be sent using send + throw an Exception, in which case, the connection will be dropped

Parameters:

connection - remote connection

rpcType - rpc type

pBody - message

dBody - data, maybe null

sender - used to send the response

Throws:

RpcException