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User defined logger callback implementation

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Added static wsrep::log::logger_fn() method to allow user to
provide logger callback.
This commit is contained in:
Teemu Ollakka
2018-11-07 21:42:28 +02:00
parent d4efa598bb
commit a942811ce7
3 changed files with 34 additions and 7 deletions
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26
include/wsrep/logger.hpp
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@ -38,6 +38,12 @@ namespace wsrep
warning,
error
};
/**
* Signature for user defined logger callback function.
*/
typedef void (*logger_fn_type)(level, const char*);
static const char* to_c_string(enum level level)
{
switch (level)
@ -49,21 +55,36 @@ namespace wsrep
};
return "unknown";
}
log(enum wsrep::log::level level, const char* prefix = "")
: level_(level)
, prefix_(prefix)
, oss_()
{ }
~log()
{
wsrep::unique_lock<wsrep::mutex> lock(mutex_);
os_ << prefix_ << ": " << oss_.str() << std::endl;
if (logger_fn_)
{
logger_fn_(level_, oss_.str().c_str());
}
else
{
wsrep::unique_lock<wsrep::mutex> lock(mutex_);
os_ << prefix_ << ": " << oss_.str() << std::endl;
}
}
template <typename T>
std::ostream& operator<<(const T& val)
{
return (oss_ << val);
}
/**
* Set user defined logger callback function.
*/
static void logger_fn(logger_fn_type);
private:
log(const log&);
log& operator=(const log&);
@ -72,6 +93,7 @@ namespace wsrep
std::ostringstream oss_;
static wsrep::mutex& mutex_;
static std::ostream& os_;
static logger_fn_type logger_fn_;
};
class log_error : public log