logging.hpp

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/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
#ifndef NDN_UTIL_LOGGING_HPP
#define NDN_UTIL_LOGGING_HPP

#include "../common.hpp"

#include <boost/log/sinks.hpp>
#include <mutex>
#include <unordered_map>

namespace ndn {
namespace util {

enum class LogLevel;
class Logger;

class Logging : noncopyable
{
public:
  static void
  addLogger(Logger& logger);

  static void
  setLevel(const std::string& moduleName, LogLevel level);

  static void
  setLevel(const std::string& config);

  static void
  setDestination(shared_ptr<std::ostream> os);

  static void
  setDestination(std::ostream& os);

  static void
  flush();

private:
  Logging();

  void
  addLoggerImpl(Logger& logger);

  void
  setLevelImpl(const std::string& moduleName, LogLevel level);

  void
  setDefaultLevel(LogLevel level);

  void
  setLevelImpl(const std::string& config);

  void
  setDestinationImpl(shared_ptr<std::ostream> os);

  void
  flushImpl();

NDN_CXX_PUBLIC_WITH_TESTS_ELSE_PRIVATE:
  static Logging&
  get();

#ifdef NDN_CXX_HAVE_TESTS
  bool
  removeLogger(Logger& logger);

  std::string
  getLevels() const;

  void
  resetLevels();

  shared_ptr<std::ostream>
  getDestination();
#endif // NDN_CXX_HAVE_TESTS

private:
  std::mutex m_mutex;
  std::unordered_map<std::string, LogLevel> m_enabledLevel; 
  std::unordered_multimap<std::string, Logger*> m_loggers; 

  shared_ptr<std::ostream> m_destination;
  typedef boost::log::sinks::asynchronous_sink<boost::log::sinks::text_ostream_backend> Sink;
  boost::shared_ptr<Sink> m_sink;
};

inline void
Logging::addLogger(Logger& logger)
{
  get().addLoggerImpl(logger);
}

inline void
Logging::setLevel(const std::string& moduleName, LogLevel level)
{
  get().setLevelImpl(moduleName, level);
}

inline void
Logging::setLevel(const std::string& config)
{
  get().setLevelImpl(config);
}

inline void
Logging::setDestination(shared_ptr<std::ostream> os)
{
  get().setDestinationImpl(os);
}

inline void
Logging::flush()
{
  get().flushImpl();
}


} // namespace util
} // namespace ndn

#endif // NDN_UTIL_LOGGING_HPP