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Basic implementation of some log sinks using the Boost log library

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A sink called SYSLOG that is intended to consume all log messages.

A sink called DATALOG that is intended for data logging.
This commit is contained in:
Bill Somerville 2020-09-24 18:55:00 +01:00
parent e83b91de95
commit 98997fb745
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1 changed files with 23 additions and 33 deletions
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56
Logger.cpp
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@ -8,11 +8,9 @@
#include <boost/log/expressions.hpp> #include <boost/log/expressions.hpp>
#include <boost/log/expressions/keyword.hpp> #include <boost/log/expressions/keyword.hpp>
#include <boost/log/attributes.hpp> #include <boost/log/attributes.hpp>
#include <boost/log/utility/exception_handler.hpp>
#include <boost/log/utility/setup/console.hpp> #include <boost/log/utility/setup/console.hpp>
#include <boost/log/utility/setup/common_attributes.hpp> #include <boost/log/utility/setup/common_attributes.hpp>
#include <boost/log/utility/setup/filter_parser.hpp> #include <boost/log/utility/setup/filter_parser.hpp>
#include <boost/log/utility/setup/formatter_parser.hpp>
#include <boost/log/utility/setup/from_stream.hpp> #include <boost/log/utility/setup/from_stream.hpp>
#include <boost/log/utility/setup/settings.hpp> #include <boost/log/utility/setup/settings.hpp>
#include <boost/log/sinks/sync_frontend.hpp> #include <boost/log/sinks/sync_frontend.hpp>
@ -25,21 +23,21 @@
#include <fstream> #include <fstream>
#include <string> #include <string>
namespace logger = boost::log; namespace logging = boost::log;
namespace srcs = logger::sources; namespace srcs = logging::sources;
namespace sinks = logger::sinks; namespace sinks = logging::sinks;
namespace keywords = logger::keywords; namespace keywords = logging::keywords;
namespace expr = logger::expressions; namespace expr = logging::expressions;
namespace attrs = logger::attributes; namespace attrs = logging::attributes;
namespace ptime = boost::posix_time; namespace ptime = boost::posix_time;
namespace Logger namespace Logger
{ {
BOOST_LOG_GLOBAL_LOGGER_CTOR_ARGS (sys, BOOST_LOG_GLOBAL_LOGGER_CTOR_ARGS (sys,
srcs::severity_channel_logger_mt<logger::trivial::severity_level>, srcs::severity_channel_logger_mt<logging::trivial::severity_level>,
(keywords::channel = "SYSLOG")); (keywords::channel = "SYSLOG"));
BOOST_LOG_GLOBAL_LOGGER_CTOR_ARGS (data, BOOST_LOG_GLOBAL_LOGGER_CTOR_ARGS (data,
srcs::severity_channel_logger_mt<logger::trivial::severity_level>, srcs::severity_channel_logger_mt<logging::trivial::severity_level>,
(keywords::channel = "DATALOG")); (keywords::channel = "DATALOG"));
namespace namespace
@ -47,10 +45,10 @@ namespace Logger
// Custom formatter factory to add TimeStamp format support in config ini file. // Custom formatter factory to add TimeStamp format support in config ini file.
// Allows %TimeStamp(format=\"%Y.%m.%d %H:%M:%S.%f\")% to be used in ini config file for property Format. // Allows %TimeStamp(format=\"%Y.%m.%d %H:%M:%S.%f\")% to be used in ini config file for property Format.
class TimeStampFormatterFactory class TimeStampFormatterFactory
: public logger::basic_formatter_factory<char, ptime::ptime> : public logging::basic_formatter_factory<char, ptime::ptime>
{ {
public: public:
formatter_type create_formatter (logger::attribute_name const& name, args_map const& args) formatter_type create_formatter (logging::attribute_name const& name, args_map const& args)
{ {
args_map::const_iterator it = args.find ("format"); args_map::const_iterator it = args.find ("format");
if (it != args.end ()) if (it != args.end ())
@ -73,10 +71,10 @@ namespace Logger
// Allows %Uptime(format=\"%O:%M:%S.%f\")% to be used in ini config file for property Format. // Allows %Uptime(format=\"%O:%M:%S.%f\")% to be used in ini config file for property Format.
// attrs::timer value type is ptime::time_duration // attrs::timer value type is ptime::time_duration
class UptimeFormatterFactory class UptimeFormatterFactory
: public logger::basic_formatter_factory<char, ptime::time_duration> : public logging::basic_formatter_factory<char, ptime::time_duration>
{ {
public: public:
formatter_type create_formatter (logger::attribute_name const& name, args_map const& args) formatter_type create_formatter (logging::attribute_name const& name, args_map const& args)
{ {
args_map::const_iterator it = args.find ("format"); args_map::const_iterator it = args.find ("format");
if (it != args.end ()) if (it != args.end ())
@ -100,26 +98,21 @@ namespace Logger
public: public:
CommonInitialization () CommonInitialization ()
{ {
// Disable all exceptions
logger::core::get ()->set_exception_handler (logger::make_exception_suppressor ());
// Add common attributes: LineID, TimeStamp, ProcessID, ThreadID // Add common attributes: LineID, TimeStamp, ProcessID, ThreadID
logger::add_common_attributes (); logging::add_common_attributes ();
// Add boost log timer as global attribute Uptime // Add boost log timer as global attribute Uptime
logger::core::get ()->add_global_attribute ("Uptime", attrs::timer ()); logging::core::get ()->add_global_attribute ("Uptime", attrs::timer ());
// Allows %Severity% to be used in ini config file for property Filter. // Allows %Severity% to be used in ini config file for property Filter.
logger::register_simple_filter_factory<logger::trivial::severity_level, char> ("Severity"); logging::register_simple_filter_factory<logging::trivial::severity_level, char> ("Severity");
// Allows %Severity% to be used in ini config file for property Format. // Allows %Severity% to be used in ini config file for property Format.
logger::register_simple_formatter_factory<logger::trivial::severity_level, char> ("Severity"); logging::register_simple_formatter_factory<logging::trivial::severity_level, char> ("Severity");
// Allows %TimeStamp(format=\"%Y.%m.%d %H:%M:%S.%f\")% to be used in ini config file for property Format. // Allows %TimeStamp(format=\"%Y.%m.%d %H:%M:%S.%f\")% to be used in ini config file for property Format.
logger::register_formatter_factory ("TimeStamp", boost::make_shared<TimeStampFormatterFactory> ()); logging::register_formatter_factory ("TimeStamp", boost::make_shared<TimeStampFormatterFactory> ());
// Allows %Uptime(format=\"%O:%M:%S.%f\")% to be used in ini config file for property Format. // Allows %Uptime(format=\"%O:%M:%S.%f\")% to be used in ini config file for property Format.
logger::register_formatter_factory ("Uptime", boost::make_shared<UptimeFormatterFactory> ()); logging::register_formatter_factory ("Uptime", boost::make_shared<UptimeFormatterFactory> ());
} }
~CommonInitialization () ~CommonInitialization ()
{ {
// Indicate start of logging
LOG_INFO ("Log Start");
} }
}; };
} }
@ -127,9 +120,6 @@ namespace Logger
void init () void init ()
{ {
CommonInitialization ci; CommonInitialization ci;
// auto sink = boost::make_shared<sinks::synchronous_sink<sinks::debug_output_backend>> ();
// sink->set_filter (expr::is_debugger_present ());
// logger::core::get ()->add_sink (sink);
} }
void init_from_config (std::istream& stream) void init_from_config (std::istream& stream)
@ -138,7 +128,7 @@ namespace Logger
try try
{ {
// Still can throw even with the exception suppressor above. // Still can throw even with the exception suppressor above.
logger::init_from_stream (stream); logging::init_from_stream (stream);
} }
catch (std::exception& e) catch (std::exception& e)
{ {
@ -153,7 +143,7 @@ namespace Logger
void disable () void disable ()
{ {
logger::core::get ()->set_logging_enabled (false); logging::core::get ()->set_logging_enabled (false);
} }
void add_datafile_log (std::string const& log_file_name) void add_datafile_log (std::string const& log_file_name)
@ -175,15 +165,15 @@ namespace Logger
// The log output formatter // The log output formatter
sink->set_formatter (expr::format ("[%1%][%2%] %3%") sink->set_formatter (expr::format ("[%1%][%2%] %3%")
% expr::attr<ptime::ptime> ("TimeStamp") % expr::attr<ptime::ptime> ("TimeStamp")
% logger::trivial::severity % logging::trivial::severity
% expr::smessage % expr::smessage
); );
// Filter by severity and by DATALOG channel // Filter by severity and by DATALOG channel
sink->set_filter (logger::trivial::severity >= logger::trivial::info && sink->set_filter (logging::trivial::severity >= logging::trivial::info &&
expr::attr<std::string> ("Channel") == "DATALOG"); expr::attr<std::string> ("Channel") == "DATALOG");
// Add it to the core // Add it to the core
logger::core::get ()->add_sink (sink); logging::core::get ()->add_sink (sink);
} }
} }