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* new logs: code
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hagen
parent
598d0e216a
commit
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2 changed files with 284 additions and 253 deletions
269
Log.h
269
Log.h
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@ -1,11 +1,19 @@
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/*
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* Copyright (c) 2013-2016, The PurpleI2P Project
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*
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* This file is part of Purple i2pd project and licensed under BSD3
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*
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* See full license text in LICENSE file at top of project tree
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*/
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#ifndef LOG_H__
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#define LOG_H__
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#include <ctime>
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#include <string>
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#include <iostream>
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#include <sstream>
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#include <fstream>
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#include <functional>
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#include <sstream>
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#include <chrono>
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#include <memory>
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#include "Queue.h"
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@ -23,150 +31,151 @@ enum LogLevel
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eNumLogLevels
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};
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class Log;
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struct LogMsg
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{
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std::stringstream s;
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Log * log;
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LogLevel level;
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LogMsg (Log * l = nullptr, LogLevel lv = eLogInfo): log (l), level (lv) {};
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void Process();
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};
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class Log: public i2p::util::MsgQueue<LogMsg>
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{
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public:
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Log () { SetOnEmpty (std::bind (&Log::Flush, this)); };
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~Log () {};
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void SetLogFile (const std::string& fullFilePath, bool truncate = true);
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void ReopenLogFile ();
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void SetLogLevel (const std::string& level);
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void SetLogStream (std::shared_ptr<std::ostream> logStream);
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std::shared_ptr<std::ostream> GetLogStream () const { return m_LogStream; };
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const std::string& GetTimestamp ();
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LogLevel GetLogLevel () { return m_MinLevel; };
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const std::string& GetFullFilePath () const { return m_FullFilePath; };
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/** start logging to syslog */
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void StartSyslog(const std::string & ident, const int facility);
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/** stop logging to syslog */
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void StopSyslog();
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/** are we logging to syslog right now? */
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bool SyslogEnabled();
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private:
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void Flush ();
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private:
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std::string m_FullFilePath; // empty if stream
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std::shared_ptr<std::ostream> m_LogStream;
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enum LogLevel m_MinLevel;
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std::string m_Timestamp;
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#if (__GNUC__ == 4) && (__GNUC_MINOR__ <= 6) && !defined(__clang__) // gcc 4.6
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std::chrono::monotonic_clock::time_point m_LastTimestampUpdate;
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#else
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std::chrono::steady_clock::time_point m_LastTimestampUpdate;
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#endif
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std::string m_Ident;
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};
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extern Log * g_Log;
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inline void StartLog (const std::string& fullFilePath)
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{
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if (!g_Log)
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{
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auto log = new Log ();
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if (fullFilePath.length () > 0)
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log->SetLogFile (fullFilePath);
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g_Log = log;
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}
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}
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inline void StartLog (std::shared_ptr<std::ostream> s)
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{
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if (!g_Log)
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{
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auto log = new Log ();
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if (s)
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log->SetLogStream (s);
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g_Log = log;
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}
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}
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inline void StopLog ()
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{
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if (g_Log)
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{
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auto log = g_Log;
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g_Log = nullptr;
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log->Stop ();
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delete log;
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}
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}
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inline void SetLogLevel (const std::string& level)
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{
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if (g_Log)
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g_Log->SetLogLevel(level);
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}
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inline void ReopenLogFile ()
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{
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if (g_Log)
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g_Log->ReopenLogFile ();
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}
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inline bool IsLogToFile ()
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{
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return g_Log ? !g_Log->GetFullFilePath ().empty () : false;
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}
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inline void StartSyslog()
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{
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StartLog("");
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enum LogType {
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eLogStdout = 0,
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eLogStream,
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eLogFile,
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#ifndef _WIN32
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g_Log->StartSyslog("i2pd", LOG_USER);
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eLogSyslog,
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#endif
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}
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};
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inline void StopSyslog()
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{
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if(g_Log)
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g_Log->StopSyslog();
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}
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namespace i2p {
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namespace log {
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struct LogMsg; /* forward declaration */
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class Log
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{
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private:
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enum LogType m_Destination;
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enum LogLevel m_MinLevel;
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std::shared_ptr<std::ostream> m_LogStream;
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std::string m_Logfile;
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std::time_t m_LastTimestamp;
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char m_LastDateTime[64];
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i2p::util::Queue<std::shared_ptr<LogMsg> > m_Queue;
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volatile bool m_IsReady;
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mutable std::mutex m_OutputLock;
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private:
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/** prevent making copies */
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Log (const Log &);
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const Log& operator=(const Log&);
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/**
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* @brief process stored messages in queue
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*/
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void Process ();
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/**
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* @brief Makes formatted string from unix timestamp
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* @param ts Second since epoch
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*
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* This function internally caches the result for last provided value
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*/
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const char * TimeAsString(std::time_t ts);
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public:
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Log ();
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~Log ();
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LogType GetLogType () { return m_Destination; };
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LogLevel GetLogLevel () { return m_MinLevel; };
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/**
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* @brief Sets minimal alloed level for log messages
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* @param level String with wanted minimal msg level
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*/
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void SetLogLevel (const std::string& level);
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/**
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* @brief Sets log destination to logfile
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* @param path Path to logfile
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*/
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void SendTo (const std::string &path);
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/**
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* @brief Sets log destination to given output stream
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* @param os Output stream
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*/
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void SendTo (std::shared_ptr<std::ostream> s);
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#ifndef _WIN32
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/**
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* @brief Sets log destination to syslog
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* @param name Wanted program name
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* @param facility Wanted log category
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*/
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void SendTo (const char *name, int facility);
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#endif
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/**
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* @brief Format log message and write to output stream/syslog
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* @param msg Pointer to processed message
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*/
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void Append(std::shared_ptr<i2p::log::LogMsg> &);
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/** @brief Flushes the output log stream */
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void Flush();
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/** @brief Reopen log file */
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void Reopen();
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};
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/**
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* @struct Log message container
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*
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* We creating it somewhere with LogPrint(),
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* then put in MsgQueue for later processing.
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*/
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struct LogMsg {
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std::time_t timestamp;
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std::string text; /**< message text as single string */
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LogLevel level; /**< message level */
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LogMsg (LogLevel lvl, std::time_t ts, const std::string & txt): timestamp(ts), text(txt), level(lvl) {};
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};
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Log & Logger();
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} // log
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} // i2p
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/** internal usage only -- folding args array to single string */
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template<typename TValue>
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void LogPrint (std::stringstream& s, TValue arg)
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void LogPrint (std::stringstream& s, TValue arg)
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{
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s << arg;
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}
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/** internal usage only -- folding args array to single string */
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template<typename TValue, typename... TArgs>
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void LogPrint (std::stringstream& s, TValue arg, TArgs... args)
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void LogPrint (std::stringstream& s, TValue arg, TArgs... args)
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{
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LogPrint (s, arg);
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LogPrint (s, args...);
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}
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/**
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* @brief Create log message and send it to queue
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* @param level Message level (eLogError, eLogInfo, ...)
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* @param args Array of message parts
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*/
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template<typename... TArgs>
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void LogPrint (LogLevel level, TArgs... args)
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void LogPrint (LogLevel level, TArgs... args)
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{
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if (g_Log && level > g_Log->GetLogLevel ())
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i2p::log::Log &log = i2p::log::Logger();
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if (level > log.GetLogLevel ())
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return;
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LogMsg * msg = new LogMsg (g_Log, level);
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LogPrint (msg->s, args...);
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msg->s << std::endl;
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if (g_Log) {
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g_Log->Put (msg);
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} else {
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msg->Process ();
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delete msg;
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}
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// fold message to single string
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std::stringstream ss("");
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LogPrint (ss, args ...);
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auto msg = std::make_shared<i2p::log::LogMsg>(level, std::time(nullptr), ss.str());
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log.Append(msg);
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}
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#endif
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#endif // LOG_H__
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