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no exceptions while logging

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This commit is contained in:
gabime 2016-08-05 03:56:40 +03:00
parent 2fc332abdc
commit 39cdd08a54
15 changed files with 847 additions and 671 deletions
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147
README.md
View File

@ -10,7 +10,6 @@ Just copy the source [folder](https://github.com/gabime/spdlog/tree/master/inclu
* Linux (gcc 4.8.1+, clang 3.5+)
* Windows (visual studio 2013+, cygwin/mingw with g++ 4.9.1+)
* Mac OSX (clang 3.5+)
* FreeBSD (gcc 4.8.1+)
##Features
* Very fast - performance is the primary goal (see [benchmarks](#benchmarks) below).
@ -58,22 +57,36 @@ Time needed to log 1,000,000 lines in asynchronous mode, i.e. the time it takes
## Usage Example
```c++
#include <iostream>
//
// Copyright(c) 2015 Gabi Melman.
// Distributed under the MIT License (http://opensource.org/licenses/MIT)
//
//
// spdlog usage example
//
#include "spdlog/spdlog.h"
int main(int, char* [])
#include <iostream>
#include <memory>
void async_example();
void syslog_example();
void user_defined_example();
void err_handler_example();
namespace spd = spdlog;
int main(int, char*[])
{
namespace spd = spdlog;
try
{
// console logger (multithreaded and with color)
// Multithreaded color console
auto console = spd::stdout_logger_mt("console", true);
console->info("Welcome to spdlog!") ;
console->info("An info message example {}..", 1);
console->info("Welcome to spdlog!");
console->error("An info message example {}..", 1);
//Formatting examples
console->info("Easy padding in numbers like {:08d}", 12);
console->info("Support for int: {0:d}; hex: {0:x}; oct: {0:o}; bin: {0:b}", 42);
// Formatting examples
console->warn("Easy padding in numbers like {:08d}", 12);
console->critical("Support for int: {0:d}; hex: {0:x}; oct: {0:o}; bin: {0:b}", 42);
console->info("Support for floats {:03.2f}", 1.23456);
console->info("Positional args are {1} {0}..", "too", "supported");
@ -81,72 +94,110 @@ int main(int, char* [])
console->info("{:>30}", "right aligned");
console->info("{:^30}", "centered");
//
spd::get("console")->info("loggers can be retrieved from a global registry using the spdlog::get(logger_name) function");
// Runtime log levels
//
spd::set_level(spd::level::info); //Set global log level to info
console->debug("This message shold not be displayed!");
console->set_level(spd::level::debug); // Set specific logger's log level
console->debug("Now it should..");
//
// Create a basic multithreaded file logger (or "basic_logger_st" for single threaded logger)
//
console->debug("This message shold be displayed..");
// Create basic file logger (not rotated)
auto my_logger = spd::basic_logger_mt("basic_logger", "logs/basic.txt");
my_logger->info("Some log message");
//
// Create a file rotating logger with 5mb size max and 3 rotated files
//
auto rotating_logger = spd::rotating_logger_mt("some_logger_name", "logs/mylogfile", 1048576 * 5, 3);
for(int i = 0; i < 10; ++i)
rotating_logger->info("{} * {} equals {:>10}", i, i, i*i);
for (int i = 0; i < 10; ++i)
rotating_logger->info("{} * {} equals {:>10}", i, i, i*i);
//
// Create a daily logger - a new file is created every day at 2:30am
//
// Create a daily logger - a new file is created every day on 2:30am
auto daily_logger = spd::daily_logger_mt("daily_logger", "logs/daily", 2, 30);
daily_logger->info(123.44);
//
// Customize msg format for all messages
//
spd::set_pattern("*** [%H:%M:%S %z] [thread %t] %v ***");
rotating_logger->info("This is another message with custom format");
spd::get("console")->info("loggers can be retrieved from a global registry using the spdlog::get(logger_name) function");
//
// Compile time debug or trace macros.
// Enabled #ifdef SPDLOG_DEBUG_ON or #ifdef SPDLOG_TRACE_ON
//
SPDLOG_TRACE(console, "Enabled only #ifdef SPDLOG_TRACE_ON..{} ,{}", 1, 3.23);
SPDLOG_DEBUG(console, "Enabled only #ifdef SPDLOG_DEBUG_ON.. {} ,{}", 1, 3.23);
//
// Asynchronous logging is very fast..
// Just call spdlog::set_async_mode(q_size) and all created loggers from now on will be asynchronous..
//
size_t q_size = 8192; //queue size must be power of 2
spdlog::set_async_mode(q_size);
auto async_file= spd::daily_logger_st("async_file_logger", "logs/async_log.txt");
async_file->info("This is async log..Should be very fast!");
async_example();
//
// syslog example. linux only..
//
#ifdef __linux__
std::string ident = "spdlog-example";
auto syslog_logger = spd::syslog_logger("syslog", ident, LOG_PID);
syslog_logger->warn("This is warning that will end up in syslog. This is Linux only!");
#endif
// syslog example. linux/osx only..
syslog_example();
// log user-defined types example..
user_defined_example();
// Change default log error handler
err_handler_example();
console->info("End of example. bye..");
// Release and close all loggers
spdlog::drop_all();
}
// Exceptions will only be thrown upon failed logger or sink construction (not during logging)
catch (const spd::spdlog_ex& ex)
{
std::cout << "Log failed: " << ex.what() << std::endl;
}
std::cout << "Log init failed: " << ex.what() << std::endl;
return 1;
}
}
void async_example()
{
size_t q_size = 4096; //queue size must be power of 2
spdlog::set_async_mode(q_size);
auto async_file = spd::daily_logger_st("async_file_logger", "logs/async_log.txt");
for (int i = 0; i < 100; ++i)
async_file->info("Async message #{}{}", i);
}
//syslog example (linux/osx only)
void syslog_example()
{
#if defined (__linux__) || defined(__APPLE__)
std::string ident = "spdlog-example";
auto syslog_logger = spd::syslog_logger("syslog", ident, LOG_PID);
syslog_logger->warn("This is warning that will end up in syslog. This is Linux only!");
#endif
}
// user defined types logging by implementing operator<<
struct my_type
{
int i;
template<typename OStream>
friend OStream& operator<<(OStream& os, const my_type &c)
{
return os << "[my_type i="<<c.i << "]";
}
};
#include <spdlog/fmt/ostr.h> // must be included
void user_defined_example()
{
spd::get("console")->info("user defined type: {}", my_type { 14 });
}
//
//custom error handler
//
void err_handler_example()
{
//can be set globaly or per logger (logger->set_error_handler(..))
spdlog::set_error_handler([](const std::string& msg) {
std::cerr << "my err handler: " << msg << std::endl;
});
spd::get("console")->info("some invalid message to trigger an error {}{}{}{}", 3);
}
```

33
example/example.cpp
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@ -7,13 +7,13 @@
//
#include "spdlog/spdlog.h"
#include <cstdlib> // EXIT_FAILURE
#include <iostream>
#include <memory>
void async_example();
void syslog_example();
void user_defined_example();
void err_handler_example();
namespace spd = spdlog;
int main(int, char*[])
@ -61,12 +61,11 @@ int main(int, char*[])
spd::set_pattern("*** [%H:%M:%S %z] [thread %t] %v ***");
rotating_logger->info("This is another message with custom format");
// Compile time debug or trace macros.
// Enabled #ifdef SPDLOG_DEBUG_ON or #ifdef SPDLOG_TRACE_ON
SPDLOG_TRACE(console, "Enabled only #ifdef SPDLOG_TRACE_ON..{} ,{}", 1, 3.23);
SPDLOG_DEBUG(console, "Enabled only #ifdef SPDLOG_DEBUG_ON.. {} ,{}", 1, 3.23);
// Asynchronous logging is very fast..
// Just call spdlog::set_async_mode(q_size) and all created loggers from now on will be asynchronous..
async_example();
@ -77,27 +76,29 @@ int main(int, char*[])
// log user-defined types example..
user_defined_example();
// Change default log error handler
err_handler_example();
console->info("End of example. bye..");
// Release and close all loggers
spdlog::drop_all();
}
// Exceptions will only be thrown upon failed logger or sink construction (not during logging)
catch (const spd::spdlog_ex& ex)
{
std::cout << "Log failed: " << ex.what() << std::endl;
return EXIT_FAILURE;
}
return EXIT_SUCCESS;
std::cout << "Log init failed: " << ex.what() << std::endl;
return 1;
}
}
void async_example()
{
size_t q_size = 4096; //queue size must be power of 2
spdlog::set_async_mode(q_size);
auto async_file = spd::daily_logger_st("async_file_logger", "logs/async_log.txt");
for (int i = 0; i < 100; ++i)
async_file->info("Async message #{}", i);
async_file->info("Async message #{}{}", i);
}
//syslog example (linux/osx only)
@ -127,3 +128,15 @@ void user_defined_example()
spd::get("console")->info("user defined type: {}", my_type { 14 });
}
//
//custom error handler
//
void err_handler_example()
{
//can be set globaly or per logger(logger->set_error_handler(..))
spdlog::set_error_handler([](const std::string& msg) {
std::cerr << "my err handler: " << msg << std::endl;
});
spd::get("console")->info("some invalid message to trigger an error {}{}{}{}", 3);
}

3
include/spdlog/common.h
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@ -11,6 +11,8 @@
#include <memory>
#include <atomic>
#include <exception>
#include<functional>
#if defined(_WIN32) && defined(SPDLOG_WCHAR_FILENAMES)
#include <codecvt>
#include <locale>
@ -58,6 +60,7 @@ using level_t = details::null_atomic_int;
using level_t = std::atomic_int;
#endif
using log_err_handler = std::function<void(const std::string &err_msg)>;
//Log level enum
namespace level

43
include/spdlog/details/async_log_helper.h
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@ -120,6 +120,7 @@ public:
async_log_helper(formatter_ptr formatter,
const std::vector<sink_ptr>& sinks,
size_t queue_size,
const log_err_handler err_handler,
const async_overflow_policy overflow_policy = async_overflow_policy::block_retry,
const std::function<void()>& worker_warmup_cb = nullptr,
const std::chrono::milliseconds& flush_interval_ms = std::chrono::milliseconds::zero(),
@ -142,14 +143,13 @@ private:
// queue of messages to log
q_type _q;
log_err_handler _err_handler;
bool _flush_requested;
bool _terminate_requested;
// last exception thrown from the worker thread
std::shared_ptr<spdlog_ex> _last_workerthread_ex;
// overflow policy
const async_overflow_policy _overflow_policy;
@ -166,10 +166,7 @@ private:
std::thread _worker_thread;
void push_msg(async_msg&& new_msg);
// throw last worker thread exception or if worker thread is not active
void throw_if_bad_worker();
// worker thread main loop
void worker_loop();
@ -181,7 +178,7 @@ private:
// sleep,yield or return immediatly using the time passed since last message as a hint
static void sleep_or_yield(const spdlog::log_clock::time_point& now, const log_clock::time_point& last_op_time);
};
}
}
@ -193,6 +190,7 @@ inline spdlog::details::async_log_helper::async_log_helper(
formatter_ptr formatter,
const std::vector<sink_ptr>& sinks,
size_t queue_size,
log_err_handler err_handler,
const async_overflow_policy overflow_policy,
const std::function<void()>& worker_warmup_cb,
const std::chrono::milliseconds& flush_interval_ms,
@ -200,6 +198,7 @@ inline spdlog::details::async_log_helper::async_log_helper(
_formatter(formatter),
_sinks(sinks),
_q(queue_size),
_err_handler(err_handler),
_flush_requested(false),
_terminate_requested(false),
_overflow_policy(overflow_policy),
@ -232,8 +231,7 @@ inline void spdlog::details::async_log_helper::log(const details::log_msg& msg)
}
inline void spdlog::details::async_log_helper::push_msg(details::async_log_helper::async_msg&& new_msg)
{
throw_if_bad_worker();
{
if (!_q.enqueue(std::move(new_msg)) && _overflow_policy != async_overflow_policy::discard_log_msg)
{
auto last_op_time = details::os::now();
@ -263,14 +261,12 @@ inline void spdlog::details::async_log_helper::worker_loop()
while(process_next_msg(last_pop, last_flush));
if (_worker_teardown_cb) _worker_teardown_cb();
}
catch (const std::exception& ex)
{
_last_workerthread_ex = std::make_shared<spdlog_ex>(std::string("async_logger worker thread exception: ") + ex.what());
}
catch (...)
{
_last_workerthread_ex = std::make_shared<spdlog_ex>("async_logger worker thread exception");
}
catch (const std::exception &ex) {
_err_handler(ex.what());
}
catch (...) {
_err_handler("Unknown exception");
}
}
// process next message in the queue
@ -362,15 +358,6 @@ inline void spdlog::details::async_log_helper::sleep_or_yield(const spdlog::log_
return sleep_for(milliseconds(200));
}
// throw if the worker thread threw an exception or not active
inline void spdlog::details::async_log_helper::throw_if_bad_worker()
{
if (_last_workerthread_ex)
{
auto ex = std::move(_last_workerthread_ex);
throw *ex;
}
}

13
include/spdlog/details/async_logger_impl.h
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@ -26,7 +26,7 @@ inline spdlog::async_logger::async_logger(const std::string& logger_name,
const std::chrono::milliseconds& flush_interval_ms,
const std::function<void()>& worker_teardown_cb) :
logger(logger_name, begin, end),
_async_log_helper(new details::async_log_helper(_formatter, _sinks, queue_size, overflow_policy, worker_warmup_cb, flush_interval_ms, worker_teardown_cb))
_async_log_helper(new details::async_log_helper(_formatter, _sinks, queue_size, _err_handler, overflow_policy, worker_warmup_cb, flush_interval_ms, worker_teardown_cb))
{
}
@ -73,5 +73,14 @@ inline void spdlog::async_logger::_set_pattern(const std::string& pattern)
inline void spdlog::async_logger::_sink_it(details::log_msg& msg)
{
_async_log_helper->log(msg);
try
{
_async_log_helper->log(msg);
}
catch (const std::exception &ex) {
_err_handler(ex.what());
}
catch (...) {
_err_handler("Unknown exception");
}
}

180
include/spdlog/details/logger_impl.h
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@ -6,35 +6,39 @@
#pragma once
#include <spdlog/logger.h>
#include <spdlog/sinks/stdout_sinks.h>
#include <memory>
#include <string>
// create logger with given name, sinks and the default pattern formatter
// all other ctors will call this one
template<class It>
inline spdlog::logger::logger(const std::string& logger_name, const It& begin, const It& end) :
_name(logger_name),
_sinks(begin, end),
_formatter(std::make_shared<pattern_formatter>("%+"))
{
// no support under vs2013 for member initialization for std::atomic
_level = level::info;
_flush_level = level::off;
inline spdlog::logger::logger(const std::string& logger_name, const It& begin, const It& end):
_name(logger_name),
_sinks(begin, end),
_formatter(std::make_shared<pattern_formatter>("%+"))
{
_level = level::info;
_flush_level = level::off;
_last_err_time = 0;
_err_handler = [this](const std::string &msg) { this->_default_err_handler(msg);};
}
// ctor with sinks as init list
inline spdlog::logger::logger(const std::string& logger_name, sinks_init_list sinks_list) :
logger(logger_name, sinks_list.begin(), sinks_list.end()) {}
inline spdlog::logger::logger(const std::string& logger_name, sinks_init_list sinks_list):
logger(logger_name, sinks_list.begin(), sinks_list.end())
{}
// ctor with single sink
inline spdlog::logger::logger(const std::string& logger_name, spdlog::sink_ptr single_sink) :
logger(logger_name,
{
single_sink
}) {}
inline spdlog::logger::logger(const std::string& logger_name, spdlog::sink_ptr single_sink):
logger(logger_name,
{
single_sink
})
{}
inline spdlog::logger::~logger() = default;
@ -42,131 +46,143 @@ inline spdlog::logger::~logger() = default;
inline void spdlog::logger::set_formatter(spdlog::formatter_ptr msg_formatter)
{
_set_formatter(msg_formatter);
_set_formatter(msg_formatter);
}
inline void spdlog::logger::set_pattern(const std::string& pattern)
{
_set_pattern(pattern);
_set_pattern(pattern);
}
template <typename... Args>
inline void spdlog::logger::log(level::level_enum lvl, const char* fmt, const Args&... args)
{
if (!should_log(lvl)) return;
details::log_msg log_msg(&_name, lvl);
try
{
log_msg.raw.write(fmt, args...);
}
catch (fmt::FormatError &ex)
{
throw spdlog::spdlog_ex(std::string("format error in \"") + fmt + "\": " + ex.what());
}
_sink_it(log_msg);
if (!should_log(lvl)) return;
try {
details::log_msg log_msg(&_name, lvl);
log_msg.raw.write(fmt, args...);
_sink_it(log_msg);
}
catch (const std::exception &ex) {
_err_handler(ex.what());
}
catch (...) {
_err_handler("Unknown exception");
}
}
template <typename... Args>
inline void spdlog::logger::log(level::level_enum lvl, const char* msg)
{
if (!should_log(lvl)) return;
details::log_msg log_msg(&_name, lvl);
log_msg.raw << msg;
_sink_it(log_msg);
if (!should_log(lvl)) return;
try {
details::log_msg log_msg(&_name, lvl);
log_msg.raw << msg;
_sink_it(log_msg);
}
catch (const std::exception &ex) {
_err_handler(ex.what());
}
catch (...) {
_err_handler("Unknown exception");
}
}
template<typename T>
inline void spdlog::logger::log(level::level_enum lvl, const T& msg)
{
if (!should_log(lvl)) return;
details::log_msg log_msg(&_name, lvl);
log_msg.raw << msg;
_sink_it(log_msg);
if (!should_log(lvl)) return;
try {
details::log_msg log_msg(&_name, lvl);
log_msg.raw << msg;
_sink_it(log_msg);
}
catch (const std::exception &ex) {
_err_handler(ex.what());
}
catch (...) {
_err_handler("Unknown exception");
}
}
template <typename... Args>
inline void spdlog::logger::trace(const char* fmt, const Args&... args)
{
log(level::trace, fmt, args...);
log(level::trace, fmt, args...);
}
template <typename... Args>
inline void spdlog::logger::debug(const char* fmt, const Args&... args)
{
log(level::debug, fmt, args...);
log(level::debug, fmt, args...);
}
template <typename... Args>
inline void spdlog::logger::info(const char* fmt, const Args&... args)
{
log(level::info, fmt, args...);
log(level::info, fmt, args...);
}
template <typename... Args>
inline void spdlog::logger::warn(const char* fmt, const Args&... args)
{
log(level::warn, fmt, args...);
log(level::warn, fmt, args...);
}
template <typename... Args>
inline void spdlog::logger::error(const char* fmt, const Args&... args)
{
log(level::err, fmt, args...);
log(level::err, fmt, args...);
}
template <typename... Args>
inline void spdlog::logger::critical(const char* fmt, const Args&... args)
{
log(level::critical, fmt, args...);
log(level::critical, fmt, args...);
}
template<typename T>
inline void spdlog::logger::trace(const T& msg)
{
log(level::trace, msg);
log(level::trace, msg);
}
template<typename T>
inline void spdlog::logger::debug(const T& msg)
{
log(level::debug, msg);
log(level::debug, msg);
}
template<typename T>
inline void spdlog::logger::info(const T& msg)
{
log(level::info, msg);
log(level::info, msg);
}
template<typename T>
inline void spdlog::logger::warn(const T& msg)
{
log(level::warn, msg);
log(level::warn, msg);
}
template<typename T>
inline void spdlog::logger::error(const T& msg)
{
log(level::err, msg);
log(level::err, msg);
}
template<typename T>
inline void spdlog::logger::critical(const T& msg)
{
log(level::critical, msg);
log(level::critical, msg);
}
@ -177,27 +193,38 @@ inline void spdlog::logger::critical(const T& msg)
//
inline const std::string& spdlog::logger::name() const
{
return _name;
return _name;
}
inline void spdlog::logger::set_level(spdlog::level::level_enum log_level)
{
_level.store(log_level);
_level.store(log_level);
}
inline void spdlog::logger::set_error_handler(spdlog::log_err_handler err_handler)
{
_err_handler = err_handler;
}
inline spdlog::log_err_handler spdlog::logger::error_handler()
{
return _err_handler;
}
inline void spdlog::logger::flush_on(level::level_enum log_level)
{
_flush_level.store(log_level);
_flush_level.store(log_level);
}
inline spdlog::level::level_enum spdlog::logger::level() const
{
return static_cast<spdlog::level::level_enum>(_level.load(std::memory_order_relaxed));
return static_cast<spdlog::level::level_enum>(_level.load(std::memory_order_relaxed));
}
inline bool spdlog::logger::should_log(spdlog::level::level_enum msg_level) const
{
return msg_level >= _level.load(std::memory_order_relaxed);
return msg_level >= _level.load(std::memory_order_relaxed);
}
//
@ -205,26 +232,41 @@ inline bool spdlog::logger::should_log(spdlog::level::level_enum msg_level) cons
//
inline void spdlog::logger::_sink_it(details::log_msg& msg)
{
_formatter->format(msg);
for (auto &sink : _sinks)
sink->log(msg);
const auto flush_level = _flush_level.load(std::memory_order_relaxed);
if (msg.level >= flush_level)
flush();
_formatter->format(msg);
for (auto &sink : _sinks)
sink->log(msg);
const auto flush_level = _flush_level.load(std::memory_order_relaxed);
if (msg.level >= flush_level)
flush();
}
inline void spdlog::logger::_set_pattern(const std::string& pattern)
{
_formatter = std::make_shared<pattern_formatter>(pattern);
_formatter = std::make_shared<pattern_formatter>(pattern);
}
inline void spdlog::logger::_set_formatter(formatter_ptr msg_formatter)
{
_formatter = msg_formatter;
_formatter = msg_formatter;
}
inline void spdlog::logger::flush()
{
for (auto& sink : _sinks)
sink->flush();
for (auto& sink : _sinks)
sink->flush();
}
inline void spdlog::logger::_default_err_handler(const std::string &msg)
{
auto now = time(nullptr);
if (now - _last_err_time < 60)
return;
auto tm_time = details::os::localtime(now);
char date_buf[100];
std::strftime(date_buf, sizeof(date_buf), "%Y-%m-%d %H:%M:%S", &tm_time);
details::log_msg err_msg;
err_msg.formatted.write("[*** LOG ERROR ***] [{}] [{}] [{}]{}", name(), msg, date_buf, details::os::eol);
sinks::stderr_sink_mt::instance()->log(err_msg);
_last_err_time = now;
}

975
include/spdlog/details/pattern_formatter_impl.h
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13
include/spdlog/details/registry.h
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@ -60,7 +60,12 @@ public:
if (_formatter)
new_logger->set_formatter(_formatter);
if (_err_handler)
new_logger->set_error_handler(_err_handler);
new_logger->set_level(_level);
//Add to registry
_loggers[logger_name] = new_logger;
return new_logger;
@ -112,6 +117,13 @@ public:
_level = log_level;
}
void set_error_handler(log_err_handler handler)
{
for (auto& l : _loggers)
l.second->set_error_handler(handler);
_err_handler = handler;
}
void set_async_mode(size_t q_size, const async_overflow_policy overflow_policy, const std::function<void()>& worker_warmup_cb, const std::chrono::milliseconds& flush_interval_ms, const std::function<void()>& worker_teardown_cb)
{
std::lock_guard<Mutex> lock(_mutex);
@ -149,6 +161,7 @@ private:
std::unordered_map <std::string, std::shared_ptr<logger>> _loggers;
formatter_ptr _formatter;
level::level_enum _level = level::info;
log_err_handler _err_handler;
bool _async_mode = false;
size_t _async_q_size = 0;
async_overflow_policy _overflow_policy = async_overflow_policy::block_retry;

7
include/spdlog/details/spdlog_impl.h
View File

@ -147,6 +147,13 @@ inline void spdlog::set_level(level::level_enum log_level)
return details::registry::instance().set_level(log_level);
}
inline void spdlog::set_error_handler(log_err_handler handler)
{
return details::registry::instance().set_error_handler(handler);
}
inline void spdlog::set_async_mode(size_t queue_size, const async_overflow_policy overflow_policy, const std::function<void()>& worker_warmup_cb, const std::chrono::milliseconds& flush_interval_ms, const std::function<void()>& worker_teardown_cb)
{

15
include/spdlog/logger.h
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@ -19,7 +19,6 @@
#include <memory>
#include <string>
namespace spdlog
{
@ -52,14 +51,17 @@ public:
template <typename T> void warn(const T&);
template <typename T> void error(const T&);
template <typename T> void critical(const T&);
bool should_log(level::level_enum) const;
void set_level(level::level_enum);
level::level_enum level() const;
const std::string& name() const;
void set_pattern(const std::string&);
void set_formatter(formatter_ptr);
void set_formatter(formatter_ptr);
// error handler
void set_error_handler(log_err_handler);
log_err_handler error_handler();
// automatically call flush() if message level >= log_level
void flush_on(level::level_enum log_level);
@ -70,11 +72,16 @@ protected:
virtual void _set_pattern(const std::string&);
virtual void _set_formatter(formatter_ptr);
// default error handler: print the error to stderr with the max rate of 1 message/minute
virtual void _default_err_handler(const std::string &msg);
const std::string _name;
std::vector<sink_ptr> _sinks;
formatter_ptr _formatter;
spdlog::level_t _level;
spdlog::level_t _flush_level;
log_err_handler _err_handler;
std::atomic<time_t> _last_err_time;
};
}

5
include/spdlog/spdlog.h
View File

@ -41,6 +41,11 @@ void set_formatter(formatter_ptr f);
//
void set_level(level::level_enum log_level);
//
// Set global error handler
//
void set_error_handler(log_err_handler);
//
// Turn on async mode (off by default) and set the queue size for each async_logger.
// effective only for loggers created after this call.

61
tests/errors.cpp Normal file
View File

@ -0,0 +1,61 @@
/*
* This content is released under the MIT License as specified in https://raw.githubusercontent.com/gabime/spdlog/master/LICENSE
*/
#include "includes.h"
#include<iostream>
TEST_CASE("default_error_handler", "[errors]]")
{
prepare_logdir();
std::string filename = "logs/simple_log.txt";
auto logger = spdlog::create<spdlog::sinks::simple_file_sink_mt>("logger", filename, true);
logger->set_pattern("%v");
logger->info("Test message {} {}", 1);
logger->info("Test message {}", 2);
logger->flush();
REQUIRE(file_contents(filename) == std::string("Test message 2\n"));
REQUIRE(count_lines(filename) == 1);
}
struct custom_ex{};
TEST_CASE("custom_error_handler", "[errors]]")
{
prepare_logdir();
std::string filename = "logs/simple_log.txt";
auto logger = spdlog::create<spdlog::sinks::simple_file_sink_mt>("logger", filename, true);
logger->set_error_handler([=](const std::string& msg) {
throw custom_ex();
});
logger->info("Good message #1");
REQUIRE_THROWS_AS(logger->info("Bad format msg {} {}", "xxx"), custom_ex);
logger->info("Good message #2");
REQUIRE(count_lines(filename) == 2);
}
TEST_CASE("async_error_handler", "[errors]]")
{
prepare_logdir();
std::string err_msg("log failed with some msg");
spdlog::set_async_mode(128);
std::string filename = "logs/simple_async_log.txt";
{
auto logger = spdlog::create<spdlog::sinks::simple_file_sink_mt>("logger", filename, true);
logger->set_error_handler([=](const std::string& msg) {
std::ofstream ofs("logs/custom_err.txt");
if (!ofs) throw std::runtime_error("Failed open logs/custom_err.txt");
ofs << err_msg;
});
logger->info("Good message #1");
logger->info("Bad format msg {} {}", "xxx");
logger->info("Good message #2");
spdlog::drop("logger"); //force logger to drain the queue and shutdown
spdlog::set_sync_mode();
}
REQUIRE(count_lines(filename) == 2);
REQUIRE(file_contents("logs/custom_err.txt") == err_msg);
}

19
tests/format.cpp
View File

@ -49,24 +49,7 @@ TEST_CASE("log_levels", "[log_levels]")
REQUIRE(log_info("Hello", spdlog::level::trace) == "Hello");
}
TEST_CASE("invalid_format", "[format]")
{
using namespace spdlog::sinks;
spdlog::logger null_logger("null_logger", std::make_shared<null_sink_st>());
REQUIRE_THROWS_AS(
null_logger.info("{} {}", "first"),
spdlog::spdlog_ex);
REQUIRE_THROWS_AS(
null_logger.info("{0:f}", "aads"),
spdlog::spdlog_ex);
REQUIRE_THROWS_AS(
null_logger.info("{0:kk}", 123),
spdlog::spdlog_ex);
}

1
tests/tests.vcxproj
View File

@ -125,6 +125,7 @@
</Link>
</ItemDefinitionGroup>
<ItemGroup>
<ClCompile Include="errors.cpp" />
<ClCompile Include="file_helper.cpp" />
<ClCompile Include="file_log.cpp" />
<ClCompile Include="format.cpp" />

3
tests/tests.vcxproj.filters
View File

@ -33,6 +33,9 @@
<ClCompile Include="utils.cpp">
<Filter>Source Files</Filter>
</ClCompile>
<ClCompile Include="errors.cpp">
<Filter>Source Files</Filter>
</ClCompile>
</ItemGroup>
<ItemGroup>
<ClInclude Include="includes.h">