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 * in the documentation and/or other materials provided with the
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#ifndef GRPCXX_GENERIC_GENERIC_STUB_H
#define GRPCXX_GENERIC_GENERIC_STUB_H

#include <grpc++/support/async_stream.h>
#include <grpc++/support/byte_buffer.h>

namespace grpc {

class CompletionQueue;
typedef ClientAsyncReaderWriter<ByteBuffer, ByteBuffer>
    GenericClientAsyncReaderWriter;

/// Generic stubs provide a type-unsafe interface to call gRPC methods
/// by name.
class GenericStub final {
 public:
  explicit GenericStub(std::shared_ptr<ChannelInterface> channel)
      : channel_(channel) {}

  /// Begin a call to a named method \a method using \a context.
  /// A tag \a tag will be delivered to \a cq when the call has been started
  /// (i.e, initial metadata has been sent).
  /// The return value only indicates whether or not registration of the call
  /// succeeded (i.e. the call won't proceed if the return value is nullptr).
  std::unique_ptr<GenericClientAsyncReaderWriter> Call(
      ClientContext* context, const grpc::string& method, CompletionQueue* cq,
      void* tag);

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

}  // namespace grpc

#endif  // GRPCXX_GENERIC_GENERIC_STUB_H