我在我的C ++程序中使用boost log,并且我使用我定义的severity_level枚举来自定义severity_logger< severity_level >
。然后我使用格式字符串"%TimeStamp% [%ThreadID%] %Severity% %Module% - %Message%"
创建我的日志接收器,但它没有显示我%Severity%
的严重性,而是在该位置只是空白。例如,2013-07-29 10:31 [0xDEADBEEF] my.Module - Hello World
。我需要在格式字符串中做什么才能显示严重性级别?
以下是我的部分代码:
#define NUM_SEVERITY_LEVELS 6
enum severity_level
{
// These are deliberately the same levels that log4j uses
trace = 0,
debug = 1,
info = 2,
warning = 3,
error = 4,
fatal = 5
};
typedef src::severity_logger< severity_level > logger_t;
const char* severity_level_str[NUM_SEVERITY_LEVELS] = {
"TRACE",
"DEBUG",
"INFO",
"WARNING",
"ERROR",
"FATAL"
};
template< typename CharT, typename TraitsT >
std::basic_ostream< CharT, TraitsT >&
operator<< (
std::basic_ostream< CharT, TraitsT >& strm,
severity_level lvl
)
{
const char* str = severity_level_str[lvl];
if (lvl < NUM_SEVERITY_LEVELS && lvl >= 0)
strm << str;
else
strm << static_cast< int >(lvl);
return strm;
}
#define FORMAT_STRING "%TimeStamp% [%ThreadID%] %Severity% %Module% - %Message%"
boost::shared_ptr< sinks::synchronous_sink< sinks::text_file_backend > >
LOG_CREATE_SINK(const std::string& strLogFilename, bool fAutoFlush)
{
return logging::add_file_log(
keywords::file_name = strLogFilename,
keywords::open_mode = (std::ios_base::app | std::ios_base::out) & ~std::ios_base::in,
keywords::auto_flush = fAutoFlush,
keywords::format = FORMAT_STRING );
}
答案 0 :(得分:0)
你应该添加
boost::log::register_simple_formatter_factory< severity_level, char >("Severity");
在调用LOG_CREATE_SINK方法之前。像这样:
int main(int argc, char* argv[])
{
boost::log::register_simple_formatter_factory< severity_level, char >("Severity");
LOG_CREATE_SINK("log_file.txt", true);
logger_t logger;
BOOST_LOG_SEV(logger, trace)
<< "text message";
return 0;
}
结果:
[] TRACE - text message