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* new logs: code

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pull/448/head
hagen 8 years ago
parent 598d0e216a
commit 17fb419fb1
2 changed files with 274 additions and 243 deletions
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250
Log.cpp
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@ -1,133 +1,155 @@
#include <boost/date_time/posix_time/posix_time.hpp>
#include "Log.h"
/*
* Copyright (c) 2013-2016, The PurpleI2P Project
*
* This file is part of Purple i2pd project and licensed under BSD3
*
* See full license text in LICENSE file at top of project tree
*/
Log * g_Log = nullptr;
#include "Log.h"
static const char * g_LogLevelStr[eNumLogLevels] =
{
"error", // eLogError
"warn", // eLogWarning
"info", // eLogInfo
"debug" // eLogDebug
};
#ifndef _WIN32
/** convert LogLevel enum to syslog priority level */
static int ToSyslogLevel(LogLevel lvl)
{
switch (lvl) {
case eLogError:
return LOG_ERR;
case eLogWarning:
return LOG_WARNING;
case eLogInfo:
return LOG_INFO;
case eLogDebug:
return LOG_DEBUG;
default:
// WTF? invalid log level?
return LOG_CRIT;
}
}
#endif
namespace i2p {
namespace log {
Log logger;
/**
* @enum Maps our loglevel to their symbolic name
*/
static const char * g_LogLevelStr[eNumLogLevels] =
{
"error", // eLogError
"warn", // eLogWarn
"info", // eLogInfo
"debug" // eLogDebug
};
void LogMsg::Process()
{
#ifndef _WIN32
if (log && log->SyslogEnabled()) {
// only log to syslog
syslog(ToSyslogLevel(level), "%s", s.str().c_str());
return;
}
/**
* @brief Maps our log levels to syslog one
* @return syslog priority LOG_*, as defined in syslog.h
*/
static inline int GetSyslogPrio (enum LogLevel l) {
int priority = LOG_DEBUG;
switch (l) {
case eLogError : priority = LOG_ERR; break;
case eLogWarning : priority = LOG_WARNING; break;
case eLogInfo : priority = LOG_INFO; break;
case eLogDebug : priority = LOG_DEBUG; break;
default : priority = LOG_DEBUG; break;
}
return priority;
}
#endif
auto stream = log ? log->GetLogStream () : nullptr;
auto& output = stream ? *stream : std::cout;
if (log)
output << log->GetTimestamp ();
else
output << boost::posix_time::second_clock::local_time().time_of_day ();
output << "/" << g_LogLevelStr[level] << " - ";
output << s.str();
}
const std::string& Log::GetTimestamp ()
{
#if (__GNUC__ == 4) && (__GNUC_MINOR__ <= 6) && !defined(__clang__)
auto ts = std::chrono::monotonic_clock::now ();
#else
auto ts = std::chrono::steady_clock::now ();
#endif
if (ts > m_LastTimestampUpdate + std::chrono::milliseconds (500)) // 0.5 second
Log::Log():
m_Destination(eLogStdout), m_MinLevel(eLogInfo),
m_LogStream (nullptr), m_Logfile(""), m_IsReady(false)
{
m_LastTimestampUpdate = ts;
m_Timestamp = boost::posix_time::to_simple_string (boost::posix_time::second_clock::local_time().time_of_day ());
}
return m_Timestamp;
}
void Log::Flush ()
{
if (m_LogStream)
m_LogStream->flush();
}
}
void Log::SetLogFile (const std::string& fullFilePath, bool truncate)
{
m_FullFilePath = fullFilePath;
auto mode = std::ofstream::out | std::ofstream::binary;
mode |= truncate ? std::ofstream::trunc : std::ofstream::app;
auto logFile = std::make_shared<std::ofstream> (fullFilePath, mode);
if (logFile->is_open ())
Log::~Log ()
{
SetLogStream (logFile);
LogPrint(eLogInfo, "Log: will send messages to ", fullFilePath);
}
}
switch (m_Destination) {
#ifndef _WIN32
case eLogSyslog :
closelog();
break;
#endif
case eLogFile:
case eLogStream:
m_LogStream->flush();
break;
default:
/* do nothing */
break;
}
Process();
}
void Log::ReopenLogFile ()
{
if (m_FullFilePath.length () > 0)
{
SetLogFile (m_FullFilePath, false); // don't truncate
LogPrint(eLogInfo, "Log: file ", m_FullFilePath, " reopen");
void Log::SetLogLevel (const std::string& level) {
if (level == "error") { m_MinLevel = eLogError; }
else if (level == "warn") { m_MinLevel = eLogWarning; }
else if (level == "info") { m_MinLevel = eLogInfo; }
else if (level == "debug") { m_MinLevel = eLogDebug; }
else {
LogPrint(eLogError, "Log: unknown loglevel: ", level);
return;
}
LogPrint(eLogInfo, "Log: min messages level set to ", level);
}
const char * Log::TimeAsString(std::time_t t) {
if (t != m_LastTimestamp) {
strftime(m_LastDateTime, sizeof(m_LastDateTime), "%H:%M:%S", localtime(&t));
m_LastTimestamp = t;
}
return m_LastDateTime;
}
}
void Log::Process() {
std::unique_lock<std::mutex> l(m_OutputLock);
while (1) {
auto msg = m_Queue.GetNextWithTimeout (1);
if (!msg)
break;
switch (m_Destination) {
#ifndef _WIN32
case eLogSyslog:
syslog(GetSyslogPrio(msg->level), "%s", msg->text.c_str());
break;
#endif
case eLogFile:
case eLogStream:
*m_LogStream << TimeAsString(msg->timestamp) << "/" << g_LogLevelStr[msg->level] << " - " << msg->text << std::endl;
break;
default:
std::cout << TimeAsString(msg->timestamp) << "/" << g_LogLevelStr[msg->level] << " - " << msg->text << std::endl;
break;
} // switch
} // while
}
void Log::SetLogLevel (const std::string& level)
{
if (level == "error") { m_MinLevel = eLogError; }
else if (level == "warn") { m_MinLevel = eLogWarning; }
else if (level == "info") { m_MinLevel = eLogInfo; }
else if (level == "debug") { m_MinLevel = eLogDebug; }
else {
LogPrint(eLogError, "Log: Unknown loglevel: ", level);
return;
}
LogPrint(eLogInfo, "Log: min msg level set to ", level);
}
void Log::Append(std::shared_ptr<i2p::log::LogMsg> & msg) {
m_Queue.Put(msg);
if (!m_IsReady)
return;
Process();
}
void Log::SetLogStream (std::shared_ptr<std::ostream> logStream)
{
m_LogStream = logStream;
}
void Log::SendTo (const std::string& path) {
auto flags = std::ofstream::out | std::ofstream::app;
auto os = std::make_shared<std::ofstream> (path, flags);
if (os->is_open ()) {
m_Logfile = path;
m_Destination = eLogFile;
m_LogStream = os;
m_IsReady = true;
return;
}
LogPrint(eLogError, "Log: can't open file ", path);
}
void Log::StartSyslog(const std::string & ident, const int facility)
{
#ifndef _WIN32
m_Ident = ident;
openlog(m_Ident.c_str(), LOG_PID, facility);
#endif
}
void Log::SendTo (std::shared_ptr<std::ostream> os) {
m_Destination = eLogStream;
m_IsReady = true;
m_LogStream = os;
}
void Log::StopSyslog()
{
#ifndef _WIN32
closelog();
m_Ident.clear();
void Log::SendTo(const char *name, int facility) {
m_Destination = eLogSyslog;
m_LogStream = nullptr;
m_IsReady = true;
openlog(name, LOG_CONS | LOG_PID, facility);
}
#endif
}
bool Log::SyslogEnabled()
{
return m_Ident.size() > 0;
}
void Log::Reopen() {
if (m_Destination == eLogFile)
SendTo(m_Logfile);
}
Log & Logger() {
return logger;
}
} // log
} // i2p

267
Log.h
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/*
* Copyright (c) 2013-2016, The PurpleI2P Project
*
* This file is part of Purple i2pd project and licensed under BSD3
*
* See full license text in LICENSE file at top of project tree
*/
#ifndef LOG_H__
#define LOG_H__
#include <ctime>
#include <string>
#include <iostream>
#include <sstream>
#include <fstream>
#include <functional>
#include <sstream>
#include <chrono>
#include <memory>
#include "Queue.h"
@ -23,150 +31,151 @@ enum LogLevel
eNumLogLevels
};
class Log;
struct LogMsg
{
std::stringstream s;
Log * log;
LogLevel level;
LogMsg (Log * l = nullptr, LogLevel lv = eLogInfo): log (l), level (lv) {};
void Process();
};
class Log: public i2p::util::MsgQueue<LogMsg>
{
public:
Log () { SetOnEmpty (std::bind (&Log::Flush, this)); };
~Log () {};
void SetLogFile (const std::string& fullFilePath, bool truncate = true);
void ReopenLogFile ();
void SetLogLevel (const std::string& level);
void SetLogStream (std::shared_ptr<std::ostream> logStream);
std::shared_ptr<std::ostream> GetLogStream () const { return m_LogStream; };
const std::string& GetTimestamp ();
LogLevel GetLogLevel () { return m_MinLevel; };
const std::string& GetFullFilePath () const { return m_FullFilePath; };
/** start logging to syslog */
void StartSyslog(const std::string & ident, const int facility);
/** stop logging to syslog */
void StopSyslog();
/** are we logging to syslog right now? */
bool SyslogEnabled();
private:
void Flush ();
private:
std::string m_FullFilePath; // empty if stream
std::shared_ptr<std::ostream> m_LogStream;
enum LogLevel m_MinLevel;
std::string m_Timestamp;
#if (__GNUC__ == 4) && (__GNUC_MINOR__ <= 6) && !defined(__clang__) // gcc 4.6
std::chrono::monotonic_clock::time_point m_LastTimestampUpdate;
#else
std::chrono::steady_clock::time_point m_LastTimestampUpdate;
enum LogType {
eLogStdout = 0,
eLogStream,
eLogFile,
#ifndef _WIN32
eLogSyslog,
#endif
std::string m_Ident;
};
extern Log * g_Log;
namespace i2p {
namespace log {
struct LogMsg; /* forward declaration */
inline void StartLog (const std::string& fullFilePath)
{
if (!g_Log)
{
auto log = new Log ();
if (fullFilePath.length () > 0)
log->SetLogFile (fullFilePath);
g_Log = log;
}
}
inline void StartLog (std::shared_ptr<std::ostream> s)
{
if (!g_Log)
{
auto log = new Log ();
if (s)
log->SetLogStream (s);
g_Log = log;
}
}
inline void StopLog ()
{
if (g_Log)
class Log
{
auto log = g_Log;
g_Log = nullptr;
log->Stop ();
delete log;
}
}
inline void SetLogLevel (const std::string& level)
{
if (g_Log)
g_Log->SetLogLevel(level);
}
inline void ReopenLogFile ()
{
if (g_Log)
g_Log->ReopenLogFile ();
}
inline bool IsLogToFile ()
{
return g_Log ? !g_Log->GetFullFilePath ().empty () : false;
}
inline void StartSyslog()
{
StartLog("");
#ifndef _WIN32
g_Log->StartSyslog("i2pd", LOG_USER);
#endif
}
inline void StopSyslog()
{
if(g_Log)
g_Log->StopSyslog();
}
private:
enum LogType m_Destination;
enum LogLevel m_MinLevel;
std::shared_ptr<std::ostream> m_LogStream;
std::string m_Logfile;
std::time_t m_LastTimestamp;
char m_LastDateTime[64];
i2p::util::Queue<std::shared_ptr<LogMsg> > m_Queue;
volatile bool m_IsReady;
mutable std::mutex m_OutputLock;
private:
/** prevent making copies */
Log (const Log &);
const Log& operator=(const Log&);
/**
* @brief process stored messages in queue
*/
void Process ();
/**
* @brief Makes formatted string from unix timestamp
* @param ts Second since epoch
*
* This function internally caches the result for last provided value
*/
const char * TimeAsString(std::time_t ts);
public:
Log ();
~Log ();
LogType GetLogType () { return m_Destination; };
LogLevel GetLogLevel () { return m_MinLevel; };
/**
* @brief Sets minimal alloed level for log messages
* @param level String with wanted minimal msg level
*/
void SetLogLevel (const std::string& level);
/**
* @brief Sets log destination to logfile
* @param path Path to logfile
*/
void SendTo (const std::string &path);
/**
* @brief Sets log destination to given output stream
* @param os Output stream
*/
void SendTo (std::shared_ptr<std::ostream> s);
#ifndef _WIN32
/**
* @brief Sets log destination to syslog
* @param name Wanted program name
* @param facility Wanted log category
*/
void SendTo (const char *name, int facility);
#endif
/**
* @brief Format log message and write to output stream/syslog
* @param msg Pointer to processed message
*/
void Append(std::shared_ptr<i2p::log::LogMsg> &);
/** @brief Flushes the output log stream */
void Flush();
/** @brief Reopen log file */
void Reopen();
};
/**
* @struct Log message container
*
* We creating it somewhere with LogPrint(),
* then put in MsgQueue for later processing.
*/
struct LogMsg {
std::time_t timestamp;
std::string text; /**< message text as single string */
LogLevel level; /**< message level */
LogMsg (LogLevel lvl, std::time_t ts, const std::string & txt): timestamp(ts), text(txt), level(lvl) {};
};
Log & Logger();
} // log
} // i2p
/** internal usage only -- folding args array to single string */
template<typename TValue>
void LogPrint (std::stringstream& s, TValue arg)
void LogPrint (std::stringstream& s, TValue arg)
{
s << arg;
}
/** internal usage only -- folding args array to single string */
template<typename TValue, typename... TArgs>
void LogPrint (std::stringstream& s, TValue arg, TArgs... args)
void LogPrint (std::stringstream& s, TValue arg, TArgs... args)
{
LogPrint (s, arg);
LogPrint (s, args...);
}
/**
* @brief Create log message and send it to queue
* @param level Message level (eLogError, eLogInfo, ...)
* @param args Array of message parts
*/
template<typename... TArgs>
void LogPrint (LogLevel level, TArgs... args)
void LogPrint (LogLevel level, TArgs... args)
{
if (g_Log && level > g_Log->GetLogLevel ())
i2p::log::Log &log = i2p::log::Logger();
if (level > log.GetLogLevel ())
return;
LogMsg * msg = new LogMsg (g_Log, level);
LogPrint (msg->s, args...);
msg->s << std::endl;
if (g_Log) {
g_Log->Put (msg);
} else {
msg->Process ();
delete msg;
}
// fold message to single string
std::stringstream ss("");
LogPrint (ss, args ...);
auto msg = std::make_shared<i2p::log::LogMsg>(level, std::time(nullptr), ss.str());
log.Append(msg);
}
#endif
#endif // LOG_H__

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