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Added log handlers via the ILogHandler interface. At the moment these are sti pretty trivial but should still allow you to add handlers for network, file etc.

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This commit is contained in:
Antony Woods 2014-05-23 08:22:12 +01:00
parent 1ae0387a25
commit 639bacf024
2 changed files with 101 additions and 66 deletions
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10
example.cpp
View File

@ -3,6 +3,13 @@
#include <sstream>
class ExampleLogHandler : public crow::ILogHandler {
public:
void log(string message, crow::LogLevel level) override {
cerr << "ExampleLogHandler -> " << message;
}
};
int main()
{
crow::Crow app;
@ -53,6 +60,9 @@ int main()
return crow::response{os.str()};
});
//crow::logger::setLogLevel(LogLevel::INFO);
//crow::logger::setHandler(std::make_shared<ExampleLogHandler>());
app.port(18080)
.multithreaded()
.run();

157
logging.h
View File

@ -8,75 +8,100 @@
using namespace std;
string timeStamp()
namespace crow
{
char date[32];
time_t t = time(0);
strftime(date, sizeof(date), "%Y-%m-%d %H:%M:%S", gmtime(&t));
return string(date);
enum class LogLevel
{
CRITICAL,
ERROR,
WARNING,
INFO,
DEBUG
};
class ILogHandler {
public:
virtual void log(string message, LogLevel level) = 0;
};
class CerrLogHandler : public ILogHandler {
public:
void log(string message, LogLevel level) override {
cerr << message;
}
};
class logger {
private:
//
static string timeStamp()
{
char date[32];
time_t t = time(0);
strftime(date, sizeof(date), "%Y-%m-%d %H:%M:%S", gmtime(&t));
return string(date);
}
public:
//
static LogLevel currentLevel;
static std::shared_ptr<ILogHandler> currentHandler;
logger(string prefix, LogLevel level) : m_prefix(prefix), m_level(level) {
}
~logger() {
#ifdef CROW_ENABLE_LOGGING
if(m_level <= currentLevel) {
ostringstream str;
str << "(" << timeStamp() << ") [" << m_prefix << "] " << m_stringStream.str() << endl;
currentHandler->log(str.str(), m_level);
}
#endif
}
//
template <typename T>
logger& operator<<(T const &value) {
#ifdef CROW_ENABLE_LOGGING
if(m_level <= currentLevel) {
m_stringStream << value;
}
#endif
return *this;
}
//
static void setLogLevel(LogLevel level) {
currentLevel = level;
}
static void setHandler(std::shared_ptr<ILogHandler> handler) {
currentHandler = handler;
}
private:
//
ostringstream m_stringStream;
string m_prefix;
LogLevel m_level;
};
//
LogLevel logger::currentLevel = (LogLevel)CROW_LOG_LEVEL;
std::shared_ptr<ILogHandler> logger::currentHandler = std::make_shared<CerrLogHandler>();
}
class logger {
public:
//
enum class Level
{
CRITICAL,
ERROR,
WARNING,
INFO,
DEBUG
};
//
static Level currentLevel;
logger(string prefix, logger::Level level) : m_prefix(prefix), m_level(level) {
}
~logger() {
#ifdef CROW_ENABLE_LOGGING
if(m_level <= currentLevel) {
cerr << "(" << timeStamp() << ") [" << m_prefix << "] " << m_stringStream.str() << endl;
}
#endif
}
//
template <typename T>
logger& operator<<(T const &value) {
#ifdef CROW_ENABLE_LOGGING
if(m_level <= currentLevel) {
m_stringStream << value;
}
#endif
return *this;
}
//
static void setLogLevel(logger::Level level) {
currentLevel = level;
}
private:
//
ostringstream m_stringStream;
string m_prefix;
Level m_level;
};
//
logger::Level logger::currentLevel = (Level)CROW_LOG_LEVEL;
#define CROW_LOG_CRITICAL logger("CRITICAL", logger::Level::CRITICAL)
#define CROW_LOG_ERROR logger("ERROR ", logger::Level::ERROR)
#define CROW_LOG_WARNING logger("WARNING ", logger::Level::WARNING)
#define CROW_LOG_INFO logger("INFO ", logger::Level::INFO)
#define CROW_LOG_DEBUG logger("DEBUG ", logger::Level::DEBUG)
#define CROW_LOG_CRITICAL logger("CRITICAL", crow::LogLevel::CRITICAL)
#define CROW_LOG_ERROR logger("ERROR ", crow::LogLevel::ERROR)
#define CROW_LOG_WARNING logger("WARNING ", crow::LogLevel::WARNING)
#define CROW_LOG_INFO logger("INFO ", crow::LogLevel::INFO)
#define CROW_LOG_DEBUG logger("DEBUG ", crow::LogLevel::DEBUG)