// // Copyright(c) 2015 Gabi Melman. // Distributed under the MIT License (http://opensource.org/licenses/MIT) // // // spdlog usage example // // #define SPDLOG_TRACE_ON #define SPDLOG_DEBUG_ON #include "spdlog/color_logger.h" //#include "spdlog/stdout_logger.h" //#include "spdlog/async.h" #include "spdlog/spdlog.h" #include #include void async_example(); void syslog_example(); void android_example(); void user_defined_example(); void err_handler_example(); namespace spd = spdlog; int main(int, char *[]) { try { // Console logger with color //spd::init_thread_pool(8192, 3); auto console1 = spdlog::stdout_color_mt("console111"); auto console2 = spdlog::stdout_color_mt<>("console2"); //auto console3 = spdlog::stdout_color_mt("console3"); for (int i = 0; i < 10000; i++) { console1->info(111111); console2->warn(222222); } spdlog::drop_all(); return 0; auto console = spdlog::stdout_color_st("console"); console->info("Welcome to spdlog!"); console->info("Welcome to spdlog!"); console->error("Some error message with arg: {}", 1); err_handler_example(); // 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"); console->info("{:<30}", "left aligned"); spd::get("console")->info("loggers can be retrieved from a global registry using the spdlog::get(logger_name) function"); // Create basic file logger (not rotated) auto my_logger = spd::basic_logger_mt("basic_logger", "logs/basic-log.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/rotating.txt", 1048576 * 5, 3); 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 on 2:30am auto daily_logger = spd::daily_logger_mt("daily_logger", "logs/daily.txt", 2, 30); // trigger flush if the log severity is error or higher daily_logger->flush_on(spd::level::err); daily_logger->info(123.44); // Customize msg format for all messages //spd::set_pattern("[%^+++%$] [%H:%M:%S %z] [thread %t] %v"); //crash console->info("This an info message with custom format"); console->error("This an error message with custom format"); // Runtime log levels spd::set_level(spd::level::info); // Set global log level to info console->debug("This message should not be displayed!"); console->set_level(spd::level::debug); // Set specific logger's log level console->debug("This message should be displayed.."); // Compile time log levels // define SPDLOG_DEBUG_ON or 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(); // syslog example. linux/osx only syslog_example(); // android example. compile with NDK android_example(); // Log user-defined types example user_defined_example(); // Change default log error handler err_handler_example(); // Apply a function on all registered loggers spd::apply_all([&](std::shared_ptr l) { l->info("End of example."); }); // 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 init failed: " << ex.what() << std::endl; return 1; } } // must be included to use async logger #include "spdlog/async.h" void async_example() { auto async_file = spd::basic_logger_mt("async_file_logger", "logs/async_log.txt"); for (int i = 0; i < 100; ++i) { async_file->info("Async message #{}", i); } // optional change thread pool settings *before* creating the logger: // spdlog::init_thread_pool(8192, 1); // if not called a defaults are: 8192 queue size and 1 worker thread. } // syslog example (linux/osx/freebsd) void syslog_example() { #ifdef SPDLOG_ENABLE_SYSLOG 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."); #endif } // Android example void android_example() { #if defined(__ANDROID__) std::string tag = "spdlog-android"; auto android_logger = spd::android_logger("android", tag); android_logger->critical("Use \"adb shell logcat\" to view this message."); #endif } // user defined types logging by implementing operator<< struct my_type { int i; template 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) { spd::get("console")->error("*******my err handler: {}", msg); }); spd::get("console")->info("some invalid message to trigger an error {}{}{}{}", 3); //spd::get("console")->info("some invalid message to trigger an error {}{}{}{}", 3); }