Solved

Boost log - how to make Line number and Function name appear in the log message

Posted on 2014-01-20
2
2,657 Views
Last Modified: 2014-01-21
I find some words explaining  to use BOOST_LOG_FUNCTION() to mark the scope of the function as you enter the function

.Prior to the log message, you hae to include  BOOST_LOG_NAMED_SCOPE();

Any good example to see how it should be done.  I can not figure it hoe to add line number and function name (or file name) into the log message.

I wonder if it is possible to selective added the line_number and function name to certain log message but not all.  How can that be done with boost
0
Comment
Question by:tommym121
2 Comments
 
LVL 86

Accepted Solution

by:
jkr earned 500 total points
ID: 39795986
You'll find a decent example here http://sourceforge.net/p/boost-log/discussion/710022/thread/c728c333#7821. Anyway, the scoop is

// TestLogging.cpp
#include <exception>
#include <string>
#include <iostream>
#include <fstream>
#include <boost/shared_ptr.hpp>
#include <boost/foreach.hpp>
#include <boost/ref.hpp>
#include <boost/log/core.hpp>
#include <boost/log/common.hpp>
#include <boost/log/attributes.hpp>
#include <boost/log/core/record.hpp>
#include <boost/log/utility/init/from_stream.hpp>
#include <boost/log/utility/init/common_attributes.hpp>
#include <boost/log/utility/init/formatter_parser.hpp>
namespace logging   = boost::log;
namespace attrs     = boost::log::attributes;
namespace src       = boost::log::sources;
using boost::shared_ptr;
enum severity_level
{
    normal,
    notification,
    warning,
    error,
    critical
};
BOOST_LOG_DECLARE_GLOBAL_LOGGER(test_lg, src::severity_logger< >)
struct scope_list_formatter
{
    typedef void result_type;
    typedef attrs::basic_named_scope<char>::scope_stack scope_stack;
    explicit scope_list_formatter(std::string const& name) :
        name_(name)
    {
    }
    void operator()(std::ostream& strm, logging::record const& rec) const
    {
        logging::extract<scope_stack> (
                name_,
                rec.attribute_values(),
                bind(&scope_list_formatter::format, boost::ref(strm),
                _1)
        );
    }
private:
    static void format(std::ostream& strm, scope_stack const& scopes)
    {
        scope_stack::const_iterator it = scopes.begin(), end = scopes.end();
        for (; it != end; ++it)
        {
            strm << it->scope_name << " [" << it->file_name << ":" << it->line
                    << "]\n";
        }
    }
private:
    std::string name_;
};
typedef logging::formatter_types< char > types;
types::formatter_type my_scopes_formatter_factory(
        types::string_type const& attr_name, types::formatter_factory_args const& args)
{
    return types::formatter_type(scope_list_formatter(attr_name));
}
int init_logging()
{
    std::ifstream settings("logging.conf");
    if (!settings.is_open())
    {
        std::cout << "Could not open logging.conf file" << std::endl;
        return -1;
    }
    logging::init_from_stream(settings);
    logging::add_common_attributes();
    //shared_ptr< logging::attribute > attr_scope(new attrs::named_scope);
    //logging::core::get()->add_global_attribute("Scope", attr_scope);
    shared_ptr< logging::attribute > attr_scope(new attrs::named_scope);
    logging::core::get()->add_global_attribute("MyScopes", attr_scope);
    logging::register_formatter_factory("MyScopes", &my_scopes_formatter_factory);
    return 0;
}
void try_logging()
{
    BOOST_LOG_FUNCTION();
    src::severity_logger< >& lg = get_test_lg();
    BOOST_LOG_SEV(lg, critical)         << "This is a critical severity record";
    BOOST_LOG_NAMED_SCOPE("random name");
    BOOST_LOG_SEV(lg, error)            << "This is a error severity record";
}
int main(int argc, char* argv[])
{
    init_logging();
    try_logging();
}

# logging.conf
[Core]
DisableLogging=false
Filter="%Severity% >= 2"
[Sink:ConsoleSettings]
Destination=Console
Format="[%Severity%] :: %File% %Scope% %Line% :: %_%"
Filter="%Tag% | %Severity% > 0"
[Sink:TextFileSettings]
Destination=TextFile
FileName=test.log
AutoFlush=true
Format="[%TimeStamp%] [%Severity%] :: %MyScopes% :: %_%"
Asynchronous=false

Open in new window

0
 

Author Closing Comment

by:tommym121
ID: 39797374
Thanks
0

Featured Post

3 Use Cases for Connected Systems

Our Dev teams are like yours. They’re continually cranking out code for new features/bugs fixes, testing, deploying, testing some more, responding to production monitoring events and more. It’s complex. So, we thought you’d like to see what’s working for us.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
Building cUrl in Windows v7.43.0 4 32
best sources to up-to-date in C++? 8 82
How to print into std::string like sprintf using C++11? 12 61
Path to  STL Map header file 1 58
What is C++ STL?: STL stands for Standard Template Library and is a part of standard C++ libraries. It contains many useful data structures (containers) and algorithms, which can spare you a lot of the time. Today we will look at the STL Vector. …
C++ Properties One feature missing from standard C++ that you will find in many other Object Oriented Programming languages is something called a Property (http://www.experts-exchange.com/Programming/Languages/CPP/A_3912-Object-Properties-in-C.ht…
The goal of the tutorial is to teach the user how to use functions in C++. The video will cover how to define functions, how to call functions and how to create functions prototypes. Microsoft Visual C++ 2010 Express will be used as a text editor an…
The viewer will be introduced to the member functions push_back and pop_back of the vector class. The video will teach the difference between the two as well as how to use each one along with its functionality.

803 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question