diff --git a/README.md b/README.md index 1146b176..5df60088 100644 --- a/README.md +++ b/README.md @@ -74,44 +74,52 @@ Time needed to log 1,000,000 lines in asynchronous mode, i.e. the time it takes ## Usage Example ```c++ -#include "spdlog/spdlog.h" +#define SPDLOG_TRACE_ON +#define SPDLOG_DEBUG_ON +// include only what you used from the below +#include "spdlog/sinks/daily_file_sink.h" +#include "spdlog/sinks/rotating_file_sink.h" +#include "spdlog/sinks/simple_file_sink.h" +#include "spdlog/sinks/stdout_color_sinks.h" #include #include void async_example(); -void syslog_example(); void user_defined_example(); void err_handler_example(); namespace spd = spdlog; -int main(int, char*[]) +int main(int, char *[]) { + try { - // Console logger with color - auto console = spd::stdout_color_mt("console"); + auto console = spdlog::stdout_color_st("console"); console->info("Welcome to spdlog!"); - console->error("Some error message with arg{}..", 1); - + + 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"); - - // Use global registry to retrieve loggers + 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.txt"); + 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/mylogfile.txt", 1048576 * 5, 3); + 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); + { + 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); @@ -121,14 +129,18 @@ int main(int, char*[]) // Customize msg format for all messages spd::set_pattern("[%^+++%$] [%H:%M:%S %z] [thread %t] %v"); - console->info("This an info message with custom format (and custom color range between the '%^' and '%$')"); - console->error("This an error message with custom format (and custom color range between the '%^' and '%$')"); + + console->info("This an info message with custom format"); + console->error("This an error message with custom format"); + + // Change format back to to default + spd::set_pattern("%+"); // 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.."); + 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 @@ -139,12 +151,6 @@ int main(int, char*[]) // 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(); @@ -152,67 +158,82 @@ int main(int, char*[]) err_handler_example(); // Apply a function on all registered loggers - spd::apply_all([&](std::shared_ptr l) - { - l->info("End of example."); - }); + spd::apply_all([&](std::shared_ptr l) { l->info("End of example."); }); // Release and close all loggers - spd::drop_all(); + spdlog::drop_all(); } // Exceptions will only be thrown upon failed logger or sink construction (not during logging) - catch (const spd::spdlog_ex& ex) + 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() { - size_t q_size = 4096; //queue size must be power of 2 - spd::set_async_mode(q_size); - auto async_file = spd::daily_logger_st("async_file_logger", "logs/async_log.txt"); + 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); + } + + // you can also modify thread pool settings *before* creating the logger: + // spdlog::init_thread_pool(32768, 4); // queue with 32k of pre allocated items and 4 backing threads. + // if not called a defaults are: preallocated 8192 queue items and 1 worker thread. } -//syslog example +// syslog example (linux/osx/freebsd) +#ifndef _WIN32 +#include "spdlog/sinks/syslog_sink.h" 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 + syslog_logger->warn("This is warning that will end up in syslog."); } +#endif + +// Android example +#if defined(__ANDROID__) +#incude "spdlog/sinks/android_sink.h" +void android_example() +{ + 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) + friend OStream &operator<<(OStream &os, const my_type &c) { - return os << "[my_type i="< // must be included +#include "spdlog/fmt/ostr.h" // must be included void user_defined_example() { - spd::get("console")->info("user defined type: {}", my_type { 14 }); + spd::get("console")->info("user defined type: {}", my_type{14}); } // -//custom error handler +// custom error handler // void err_handler_example() -{ - spd::set_error_handler([](const std::string& msg) { - std::cerr << "my err handler: " << msg << std::endl; - }); - // (or logger->set_error_handler(..) to set for specific logger) +{ + // 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); } ```