Class UnaryMethodHandlerSupplier.UnaryFutureNoRequest<ReqT,​RespT>

  • Type Parameters:
    ReqT - the request type
    RespT - the response type
    All Implemented Interfaces:
    io.grpc.stub.ServerCalls.BidiStreamingMethod<ReqT,​RespT>, io.grpc.stub.ServerCalls.ClientStreamingMethod<ReqT,​RespT>, io.grpc.stub.ServerCalls.ServerStreamingMethod<ReqT,​RespT>, io.grpc.stub.ServerCalls.UnaryMethod<ReqT,​RespT>, MethodHandler<ReqT,​RespT>
    Enclosing class:

    public static class UnaryMethodHandlerSupplier.UnaryFutureNoRequest<ReqT,​RespT>
    extends UnaryMethodHandlerSupplier.AbstractUnaryHandler<ReqT,​RespT>
    A unary MethodHandler that calls a handler method of the form.
         void invoke(CompletableFuture<RespT> future)

    If the future completes normally and has a none null none Void result then that result will be passed to the StreamObserver.onNext(Object) method. If the future completes exceptionally then the error will be passed to the StreamObserver.onError(Throwable) method.

    • Method Detail

      • invoke

        protected void invoke​(Method method,
                              Object instance,
                              ReqT request,
                              io.grpc.stub.StreamObserver<RespT> observer)
                       throws InvocationTargetException,
        Description copied from class: io.helidon.microprofile.grpc.core.AbstractMethodHandlerSupplier.AbstractHandler
        Invoke the actual unary or server streaming gRPC method handler.
        Specified by:
        invoke in class io.helidon.microprofile.grpc.core.AbstractMethodHandlerSupplier.AbstractHandler<ReqT,​RespT>
        method - the Method to invoke
        instance - the service instance to invoke the method on
        request - the method request
        observer - the method response observer
        InvocationTargetException - if an error occurs invoking the method
        IllegalAccessException - if the method cannot be accessed
      • unary

        public Object unary​(Object[] args,
                            MethodHandler.UnaryClient client)
        Invoke the client call.

        The call is from a method signature:

             void invoke(CompletableFuture<RespT> future)
        so there is no request parameter and the CompletableFuture to receive the response is in args[1.
        args - the call arguments.
        client - the MethodHandler.UnaryClient instance to forward the call to
        the method signature return is void so this method always returns null