generic_stub_impl.h

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/*
 *
 * Copyright 2015 gRPC authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */

#ifndef GRPCPP_GENERIC_GENERIC_STUB_IMPL_H
#define GRPCPP_GENERIC_GENERIC_STUB_IMPL_H

#include <functional>

#include <grpcpp/client_context.h>
#include <grpcpp/support/async_stream_impl.h>
#include <grpcpp/support/async_unary_call_impl.h>
#include <grpcpp/support/byte_buffer.h>
#include <grpcpp/support/client_callback_impl.h>
#include <grpcpp/support/status.h>

#include <functional>

namespace grpc {

typedef ::grpc_impl::ClientAsyncReaderWriter<ByteBuffer, ByteBuffer>
    GenericClientAsyncReaderWriter;
typedef ::grpc_impl::ClientAsyncResponseReader<ByteBuffer>
    GenericClientAsyncResponseReader;
}  // namespace grpc
namespace grpc_impl {
class CompletionQueue;

class GenericStub final {
 public:
  explicit GenericStub(std::shared_ptr<grpc::ChannelInterface> channel)
      : channel_(channel) {}

  std::unique_ptr<grpc::GenericClientAsyncReaderWriter> PrepareCall(
      grpc::ClientContext* context, const grpc::string& method,
      CompletionQueue* cq);

  std::unique_ptr<grpc::GenericClientAsyncResponseReader> PrepareUnaryCall(
      grpc_impl::ClientContext* context, const grpc::string& method,
      const grpc::ByteBuffer& request, CompletionQueue* cq);

  std::unique_ptr<grpc::GenericClientAsyncReaderWriter> Call(
      grpc_impl::ClientContext* context, const grpc::string& method,
      CompletionQueue* cq, void* tag);

  class experimental_type {
   public:
    explicit experimental_type(GenericStub* stub) : stub_(stub) {}

    void UnaryCall(grpc_impl::ClientContext* context,
                   const grpc::string& method, const grpc::ByteBuffer* request,
                   grpc::ByteBuffer* response,
                   std::function<void(grpc::Status)> on_completion);

    void UnaryCall(grpc_impl::ClientContext* context,
                   const grpc::string& method, const grpc::ByteBuffer* request,
                   grpc::ByteBuffer* response,
                   grpc_impl::experimental::ClientUnaryReactor* reactor);

    void PrepareBidiStreamingCall(
        grpc_impl::ClientContext* context, const grpc::string& method,
        grpc_impl::experimental::ClientBidiReactor<grpc::ByteBuffer,
                                                   grpc::ByteBuffer>* reactor);

   private:
    GenericStub* stub_;
  };

  experimental_type experimental() { return experimental_type(this); }

 private:
  std::shared_ptr<grpc::ChannelInterface> channel_;
};

}  // namespace grpc_impl

#endif  // GRPCPP_GENERIC_GENERIC_STUB_IMPL_H