Package io.grpc.stub

Interface ClientResponseObserver<ReqT,RespT>

All Superinterfaces:

StreamObserver<RespT>

public interface ClientResponseObserver<ReqT,RespT>
extends StreamObserver<RespT>

Specialization of StreamObserver implemented by clients in order to interact with the advanced features of a call such as flow-control.

Method Summary

Modifier and Type	Method	Description
void	beforeStart(ClientCallStreamObserver<ReqT> requestStream)	Called by the runtime prior to the start of a call to provide a reference to the ClientCallStreamObserver for the outbound stream.

Methods inherited from interface io.grpc.stub.StreamObserver

onCompleted, onError, onNext

Method Details

beforeStart

void beforeStart(ClientCallStreamObserver<ReqT> requestStream)

Called by the runtime prior to the start of a call to provide a reference to the ClientCallStreamObserver for the outbound stream. This can be used to listen to onReady events, disable auto inbound flow and perform other advanced functions.

Only the methods ClientCallStreamObserver.setOnReadyHandler(Runnable) and ClientCallStreamObserver.disableAutoRequestWithInitial(int) may be called within this callback

   // Copy an iterator to the request stream under flow-control
   someStub.fullDuplexCall(new ClientResponseObserver<ReqT, RespT>() {
     public void beforeStart(final ClientCallStreamObserver<Req> requestStream) {
       StreamObservers.copyWithFlowControl(someIterator, requestStream);
   });