org.apache.drill.exec.rpc.control

Interface Controller.CustomMessageHandler<REQUEST,RESPONSE>

Type Parameters:

REQUEST - The type of request message.

RESPONSE - The type of the response message.

Enclosing interface:

Controller

public static interface Controller.CustomMessageHandler<REQUEST,RESPONSE>

Defines how the Controller should handle custom messages. Implementations need to be threadsafe.

Method Summary

Modifier and Type	Method and Description
Controller.CustomResponse<RESPONSE>	onMessage(REQUEST pBody, DrillBuf dBody) Handle an incoming message.

Method Detail

onMessage

Controller.CustomResponse<RESPONSE> onMessage(REQUEST pBody,
                                              DrillBuf dBody)
                                       throws UserRpcException

Handle an incoming message.

Parameters:

pBody - The protobuf body message object of type REQUEST that was sent.

dBody - An optional byte body that was sent along with the structured message.

Returns:

The response that should be sent to the message sender.

Throws:

UserRpcException - throw this exception if there is an RPC failure that should be communicated to the sender.