channel_arguments.h

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#ifndef GRPCXX_SUPPORT_CHANNEL_ARGUMENTS_H
#define GRPCXX_SUPPORT_CHANNEL_ARGUMENTS_H

#include <list>
#include <vector>

#include <grpc++/support/config.h>
#include <grpc/compression.h>
#include <grpc/grpc.h>

namespace grpc {
namespace testing {
class ChannelArgumentsTest;
}  // namespace testing

class ChannelArguments {
 public:
  ChannelArguments();
  ~ChannelArguments() {}

  ChannelArguments(const ChannelArguments& other);
  ChannelArguments& operator=(ChannelArguments other) {
    Swap(other);
    return *this;
  }

  void Swap(ChannelArguments& other);

  void SetChannelArgs(grpc_channel_args* channel_args) const;

  // gRPC specific channel argument setters
  void SetSslTargetNameOverride(const grpc::string& name);
  // TODO(yangg) add flow control options
  void SetCompressionAlgorithm(grpc_compression_algorithm algorithm);

  void SetUserAgentPrefix(const grpc::string& user_agent_prefix);

  // Generic channel argument setters. Only for advanced use cases.
  void SetInt(const grpc::string& key, int value);

  // Generic channel argument setter. Only for advanced use cases.
  void SetPointer(const grpc::string& key, void* value);

  void SetString(const grpc::string& key, const grpc::string& value);

 private:
  friend class SecureChannelCredentials;
  friend class testing::ChannelArgumentsTest;

  struct PointerVtableMembers {
    static void* Copy(void* in) { return in; }
    static void Destroy(void* in) {}
    static int Compare(void* a, void* b) {
      if (a < b) return -1;
      if (a > b) return 1;
      return 0;
    }
  };

  // Returns empty string when it is not set.
  grpc::string GetSslTargetNameOverride() const;

  std::vector<grpc_arg> args_;
  std::list<grpc::string> strings_;
};

}  // namespace grpc

#endif  // GRPCXX_SUPPORT_CHANNEL_ARGUMENTS_H