void register_logger(LoggerId logger_id, Logger& logger) {
MutexLock const l(_log_levels_mutex);
GUM_CHECK(!_loggers.count(logger_id), LogicError("Logger already registered"));
_loggers.emplace(logger_id, logger);
}
/**
* Destructor. Delete logger from the map.
*/
Logger::~Logger() {
trace("~Logger destroyed");
// FIXME need to close handler
Loggers::iterator it = loggers.find(getName());
if (it != loggers.end()) {
loggers.erase(it);
}
}
void set_logger_level(LoggerId logger_id, LogLevel level) {
MutexLock const l(_log_levels_mutex);
auto const iter = _loggers.find(logger_id);
if (iter == _loggers.end())
return;
iter->second.get().set_log_level(level);
}
LoggerPtr Logger::getRootLogger()
{
Loggers::iterator it = loggers.find(ROOT_LOGGER_NAME);
if (it != loggers.end()) {
return it->second;
} else {
LoggerPtr logger = new Logger(ROOT_LOGGER_NAME);
logger->setParent(NULL);
logger->setUseParent(false);
loggers.insert(it, Loggers::value_type(ROOT_LOGGER_NAME, logger));
return logger;
}
}
LoggerPtr Logger::getLogger(const string &name)
{
Loggers::iterator it = loggers.find(name);
if (it != loggers.end()) {
return it->second;
} else {
LoggerPtr logger = new Logger(name);
if (!logger->isRootLogger()) {
LoggerPtr root = Logger::getRootLogger();
logger->setParent(root);
logger->setUseParent(true);
logger->setLevel(root->getLevel());
}
logger->trace("Created logger");
loggers.insert(it, Loggers::value_type(name, logger));
return logger;
}
}
void unregister_logger(LoggerId logger_id) {
MutexLock const l(_log_levels_mutex);
_loggers.erase(logger_id);
}
namespace mckeys {
using namespace std;
/**
* Interal to this logging implementations.
*/
static Loggers loggers;
static string ROOT_LOGGER_NAME = "";
/**
* Static methods. This is how you get a handle on a logger.
*/
ostream* Logger::_handler = NULL;
LoggerPtr Logger::getLogger(const string &name)
{
Loggers::iterator it = loggers.find(name);
if (it != loggers.end()) {
return it->second;
} else {
LoggerPtr logger = new Logger(name);
if (!logger->isRootLogger()) {
LoggerPtr root = Logger::getRootLogger();
logger->setParent(root);
logger->setUseParent(true);
logger->setLevel(root->getLevel());
}
logger->trace("Created logger");
loggers.insert(it, Loggers::value_type(name, logger));
return logger;
}
}
LoggerPtr Logger::getRootLogger()
{
Loggers::iterator it = loggers.find(ROOT_LOGGER_NAME);
if (it != loggers.end()) {
return it->second;
} else {
LoggerPtr logger = new Logger(ROOT_LOGGER_NAME);
logger->setParent(NULL);
logger->setUseParent(false);
loggers.insert(it, Loggers::value_type(ROOT_LOGGER_NAME, logger));
return logger;
}
}
/**
* Destructor. Delete logger from the map.
*/
Logger::~Logger() {
trace("~Logger destroyed");
// FIXME need to close handler
Loggers::iterator it = loggers.find(getName());
if (it != loggers.end()) {
loggers.erase(it);
}
}
/**
* Manage the logging.Level associated with this logger.
*/
Level Logger::getLevel() const
{
return _level;
}
void Logger::setLevel(const Level &level)
{
trace(CONTEXT, "Changing log level from %s to %s",
_level.getName().c_str(), level.getName().c_str());
_level = level;
}
/**
* The name associated with this logger.
*/
string Logger::getName() const
{
return _name;
}
/**
* Manage the parent of this logger.
*/
void Logger::setParent(const LoggerPtr &logger)
{
_parent = logger;
}
LoggerPtr Logger::getParent() const
{
return _parent;
}
/**
* Whether or not to use the parent logger for logging.
*/
void Logger::setUseParent(const bool use_parent)
{
_useParent = use_parent;
}
bool Logger::getUseParent() const
{
return _useParent;
}
void Logger::setHandler(std::ostream* handler) {
_handler = handler;
}
/**
* True if this logger is the root logger, false otherwise.
*/
bool Logger::isRootLogger() const
{
return (getName() == ROOT_LOGGER_NAME);
}
/**
* Logging for various levels.
*/
void Logger::log(const Level &level, const string &msg)
{
if (level >= getLevel()) {
Record rec = Record();
rec.setLevel(level);
rec.setLoggerName(getName());
rec.setMessage(msg);
log(level, rec);
}
}
void Logger::log(const Level &level, const Record &record)
{
if (level >= getLevel()) {
// TODO this should support writing via an appender so users can log to a
// file while seeing stats on their display
string out = format(record);
_writeMutex.lock();
getHandler() << out << endl;
getHandler().flush();
_writeMutex.unlock();
LoggerPtr logger = getParent();
if (logger != NULL && logger->getUseParent()) {
logger->log(level, record);
}
}
}
void Logger::trace(const string &msg)
{
log(Level::TRACE, msg);
}
void Logger::trace(Record record, string fmt, ...)
{
LOG_WITH_VARARGS(Level::TRACE, record, fmt, this);
}
void Logger::debug(const string &msg)
{
log(Level::DEBUG, msg);
}
void Logger::debug(Record record, string fmt, ...)
{
LOG_WITH_VARARGS(Level::DEBUG, record, fmt, this);
}
void Logger::info(const string &msg)
{
log(Level::INFO, msg);
}
void Logger::info(Record record, string fmt, ...)
{
LOG_WITH_VARARGS(Level::INFO, record, fmt, this);
}
void Logger::warning(const string &msg)
{
log(Level::WARNING, msg);
}
void Logger::warning(Record record, string fmt, ...)
{
LOG_WITH_VARARGS(Level::WARNING, record, fmt, this);
}
void Logger::error(const string &msg)
{
log(Level::ERROR, msg);
}
void Logger::error(Record record, string fmt, ...)
{
LOG_WITH_VARARGS(Level::ERROR, record, fmt, this);
}
void Logger::fatal(const string &msg)
{
log(Level::FATAL, msg);
}
void Logger::fatal(Record record, string fmt, ...)
{
LOG_WITH_VARARGS(Level::FATAL, record, fmt, this);
}
// protected
Logger::Logger(const string &name)
: _name(name),
_level(Level::WARNING),
_writeMutex()
{
if (_handler == NULL) {
_handler = &cout;
}
}
// TODO make this configurable
string Logger::format(const Record &rec)
{
ostringstream out;
out << rec.getLevel().getName() << " ";
out << "[" << rec.getTimestamp() << "] ";
if (!rec.getMethodName().empty()) {
out << "[" << rec.getFileName() << ":" << rec.getLineNumber() << "][";
out << rec.getMethodName() << "] ";
}
if (rec.hasThrown()) {
out << "[exception(" << rec.getThrownMessage() << ")] ";
}
if (isRootLogger()) {
out << "(root): ";
} else {
out << rec.getLoggerName() << ": ";
}
out << rec.getMessage();
return out.str();
}
ostream& Logger::getHandler() {
return (*_handler);
}
} // end namespace
