QMsgLogger.hh

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#ifndef _QMSG_LOGGER_HH_
#define _QMSG_LOGGER_HH_

// QFramework includes
#include "QCuore.hh"
#include "QDaqCommonDefs.hh"
#include "QMessageDefs.hh"
#include "QError.hh"

// standard C/C++ includes
#include <fstream>
#include <string>
#include <list>
#include <map>

class QMsgLogger {
public:

   struct QProcessInfo_t 
   {
      pid_t pid;
      ProcessStatus_t status;
      std::string hostname;
   };

   static QMsgLogger& GetInstance();

   virtual ~QMsgLogger();

   bool HasError() const { return fError != QERR_SUCCESS; }
   void ResetError() { fError.Set(QERR_SUCCESS); }
   const QError& GetError() const { return fError; }

   bool RegisterProcess(const std::string& process,
                        const std::string& host,
                        pid_t              pid);

   bool ReleaseProcess(const std::string& process);
   
   bool UpdateStatus(const std::string& process,
                     ProcessStatus_t    status);

   void WriteLog(MsgLevel           severity,
                 const std::string& sender,
                 const std::string& message);

   void Write(const std::string& message, MsgLevel severity);

   std::list<std::string> GetRegisteredProcesses() const;
   
   bool GetProcessInfo(const std::string& process,
                       pid_t*             pid,
                       ProcessStatus_t*   status,
                       std::string*       host);

private:
   QMsgLogger();

   std::map<std::string,QProcessInfo_t*> fProcesses;
   
   std::ofstream fOs;

   QError fError;

   const std::string& GetTime() const;

   const std::string& FormatForLog(MsgLevel severity) const;

};

#endif // _QMSG_LOGGER_HH_

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