channel.h

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#ifndef SINGA_UTILS_CHANNEL_H_
#define SINGA_UTILS_CHANNEL_H_

#include <google/protobuf/message.h>

#include <iostream>
#include <fstream>
#include <map>
#include <string>

namespace singa {

class Channel {
 public:
  explicit Channel(const std::string& name);
  ~Channel();

  inline const std::string& GetName() { return name_; }
  inline void EnableDestStderr(bool enable) { stderr_ = enable; }
  inline void EnableDestFile(bool enable) { file_ = enable; }
  void SetDestFilePath(const std::string& file);
  void Send(const std::string& message);
  void Send(const google::protobuf::Message& message);

 private:
  std::string name_ = "";
  bool stderr_ = false;
  bool file_ = false;
  std::ofstream os_;
};

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

  void Init();
  void SetDefaultDir(const char* dir);
  Channel* GetInstance(const std::string& channel);

 private:
  std::string dir_ = "";
  std::map<std::string, Channel*> name2ptr_;
};

void InitChannel(const char* argv);
void SetChannelDirectory(const char* path);
Channel* GetChannel(const std::string& channel_name);

}  // namespace singa

#endif  // SINGA_UTILS_CHANNEL_H__