/*
 *
 * Copyright 2014, Google Inc.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 *     * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above
 * copyright notice, this list of conditions and the following disclaimer
 * in the documentation and/or other materials provided with the
 * distribution.
 *     * Neither the name of Google Inc. nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 */

#ifndef __GRPCPP_STREAM_CONTEXT_INTERFACE_H__
#define __GRPCPP_STREAM_CONTEXT_INTERFACE_H__

namespace google {
namespace protobuf {
class Message;
}
}

namespace grpc {
class Status;

// An interface to avoid dependency on internal implementation.
class StreamContextInterface {
 public:
  virtual ~StreamContextInterface() {}

  virtual void Start(bool buffered) = 0;

  virtual bool Read(google::protobuf::Message* msg) = 0;
  virtual bool Write(const google::protobuf::Message* msg, bool is_last) = 0;
  virtual const Status& Wait() = 0;
  virtual void Cancel() = 0;

  virtual google::protobuf::Message* request() = 0;
  virtual google::protobuf::Message* response() = 0;
};

}  // namespace grpc

#endif  // __GRPCPP_STREAM_CONTEXT_INTERFACE_H__