WSJT-X/WSJTXLogging.cpp

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#include "WSJTXLogging.hpp"
#include <string>
#include <exception>
#include <sstream>
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#include <boost/version.hpp>
#include <boost/log/core.hpp>
#include <boost/log/utility/exception_handler.hpp>
#include <boost/log/trivial.hpp>
#include <boost/log/sinks/text_file_backend.hpp>
#include <boost/log/sinks/async_frontend.hpp>
#include <boost/log/expressions.hpp>
#include <boost/log/expressions/formatters/date_time.hpp>
#include <boost/log/expressions/predicates/channel_severity_filter.hpp>
#include <boost/log/support/date_time.hpp>
#include <boost/date_time/posix_time/posix_time.hpp>
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#include <boost/date_time/gregorian/greg_day.hpp>
#include <boost/container/flat_map.hpp>
#include <QtGlobal>
#include <QDir>
#include <QFile>
#include <QTextStream>
#include <QString>
#include <QStandardPaths>
#include <QRegularExpression>
#include <QMessageLogContext>
#include "Logger.hpp"
#include "qt_helpers.hpp"
namespace logging = boost::log;
namespace trivial = logging::trivial;
namespace keywords = logging::keywords;
namespace expr = logging::expressions;
namespace sinks = logging::sinks;
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namespace posix_time = boost::posix_time;
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namespace gregorian = boost::gregorian;
namespace container = boost::container;
BOOST_LOG_ATTRIBUTE_KEYWORD(severity, "Severity", trivial::severity_level)
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BOOST_LOG_ATTRIBUTE_KEYWORD(channel, "Channel", std::string)
namespace
{
// Top level exception handler that gets exceptions from filters and
// formatters.
struct exception_handler
{
typedef void result;
void operator () (std::runtime_error const& e) const
{
std::cout << "std::runtime_error: " << e.what () << std::endl;
}
void operator () (std::logic_error const& e) const
{
std::cout << "std::logic_error: " << e.what () << std::endl;
throw;
}
};
// Reroute Qt messages to the system logger
void qt_log_handler (QtMsgType type, QMessageLogContext const& context, QString const& msg)
{
// Convert Qt message types to logger severities
auto severity = trivial::trace;
switch (type)
{
case QtDebugMsg: severity = trivial::debug; break;
case QtInfoMsg: severity = trivial::info; break;
case QtWarningMsg: severity = trivial::warning; break;
case QtCriticalMsg: severity = trivial::error; break;
case QtFatalMsg: severity = trivial::fatal; break;
}
// Map non-default Qt categories to logger channels, Qt logger
// context is mapped to the appropriate logger attributes.
auto log = sys::get ();
std::string file;
std::string function;
if (context.file)
{
file = context.file;
}
if (context.function)
{
function = context.function;
}
if (!context.category || !qstrcmp (context.category, "default"))
{
BOOST_LOG_SEV (log, severity)
<< boost::log::add_value ("Line", context.line)
<< boost::log::add_value ("File", file)
<< boost::log::add_value ("Function", function)
<< msg.toStdWString ();
}
else
{
BOOST_LOG_SEV (log, severity)
<< boost::log::add_value ("Line", context.line)
<< boost::log::add_value ("File", file)
<< boost::log::add_value ("Function", function)
<< context.category << ": " << msg.toStdWString ();
}
}
}
WSJTXLogging::WSJTXLogging ()
{
auto core = logging::core::get ();
// Catch relevant exceptions from logging.
core->set_exception_handler
(
logging::make_exception_handler<std::runtime_error, std::logic_error> (exception_handler {})
);
// Check for a user-defined logging configuration settings file.
QFile log_config {QStandardPaths::locate (QStandardPaths::ConfigLocation, "wsjtx_log_config.ini")};
if (log_config.exists () && log_config.open (QFile::ReadOnly) && log_config.isReadable ())
{
QTextStream ts {&log_config};
auto config = ts.readAll ();
// Substitution variables.
container::flat_map<QString, QString> replacements =
{
{"DesktopLocation", QStandardPaths::writableLocation (QStandardPaths::DesktopLocation)},
{"DocumentsLocation", QStandardPaths::writableLocation (QStandardPaths::DocumentsLocation)},
{"TempLocation", QStandardPaths::writableLocation (QStandardPaths::TempLocation)},
{"HomeLocation", QStandardPaths::writableLocation (QStandardPaths::HomeLocation)},
{"CacheLocation", QStandardPaths::writableLocation (QStandardPaths::CacheLocation)},
{"GenericCacheLocation", QStandardPaths::writableLocation (QStandardPaths::GenericCacheLocation)},
{"GenericDataLocation", QStandardPaths::writableLocation (QStandardPaths::GenericDataLocation)},
{"AppDataLocation", QStandardPaths::writableLocation (QStandardPaths::AppDataLocation)},
{"AppLocalDataLocation", QStandardPaths::writableLocation (QStandardPaths::AppLocalDataLocation)},
};
// Parse the configration settings substituting the variable if found.
QString new_config;
int pos {0};
QRegularExpression subst_vars {R"(\${([^}]+)})"};
auto iter = subst_vars.globalMatch (config);
while (iter.hasNext ())
{
auto match = iter.next ();
auto const& name = match.captured (1);
auto repl_iter = replacements.find (name);
auto repl = repl_iter != replacements.end () ? repl_iter->second : "${" + name + "}";
new_config += config.mid (pos, match.capturedStart (1) - 2 - pos) + repl;
pos = match.capturedEnd (0);
}
new_config += config.mid (pos);
std::wstringbuf buffer {new_config.toStdWString (), std::ios_base::in};
std::wistream stream {&buffer};
Logger::init_from_config (stream);
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LOG_INFO ("Read logging configuration file: " << log_config.fileName ());
}
else // Default setup
{
//
// Define sinks, filters, and formatters using expression
// templates for efficiency.
//
// Default log file location.
QDir app_data {QStandardPaths::writableLocation (QStandardPaths::AppLocalDataLocation)};
Logger::init (); // Basic setup of attributes
//
// Sink intended for general use that passes everything above
// selected severity levels per channel. Log file is appended
// between sessions and rotated to limit storage space usage.
//
auto sys_sink = boost::make_shared<sinks::asynchronous_sink<sinks::text_file_backend>>
(
keywords::auto_flush = false
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#if BOOST_VERSION / 100 >= 1070
, keywords::file_name = app_data.absoluteFilePath ("wsjtx_syslog.log").toStdWString ()
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, keywords::target_file_name =
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#else
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, keywords::file_name =
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#endif
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app_data.absoluteFilePath ("logs/wsjtx_syslog_%Y-%m.log").toStdString ()
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, keywords::time_based_rotation = sinks::file::rotation_at_time_point (gregorian::greg_day (1), 0, 0, 0)
, keywords::open_mode = std::ios_base::out | std::ios_base::app
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#if BOOST_VERSION / 100 >= 1063
, keywords::enable_final_rotation = false
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#endif
);
sys_sink->locked_backend ()->set_file_collector
(
sinks::file::make_collector
(
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keywords::max_size = 40 * 1024 * 1024
, keywords::min_free_space = 1024 * 1024 * 1024
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, keywords::max_files = 12
, keywords::target = app_data.absoluteFilePath ("logs").toStdWString ()
)
);
sys_sink->locked_backend ()->scan_for_files ();
// Per channel severity level filter
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using min_severity_filter = expr::channel_severity_filter_actor<std::string, trivial::severity_level>;
min_severity_filter min_severity = expr::channel_severity_filter (channel, severity);
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min_severity["SYSLOG"] = trivial::info;
min_severity["RIGCTRL"] = trivial::info;
min_severity["DATALOG"] = trivial::info;
sys_sink->set_filter (min_severity || severity >= trivial::fatal);
sys_sink->set_formatter
(
expr::stream
<< "[" << channel
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<< "][" << expr::format_date_time<posix_time::ptime> ("TimeStamp", "%Y-%m-%d %H:%M:%S.%f")
<< "][" << expr::format_date_time<posix_time::time_duration> ("Uptime", "%O:%M:%S.%f")
<< "][" << trivial::severity
<< "] " << expr::message
);
core->add_sink (sys_sink);
}
// Indicate start of logging
LOG_INFO ("Log Start");
::qInstallMessageHandler (&qt_log_handler);
}
WSJTXLogging::~WSJTXLogging ()
{
LOG_INFO ("Log Finish");
auto core = logging::core::get ();
core->flush ();
core->remove_all_sinks ();
}