119 lines
3.9 KiB
C++
119 lines
3.9 KiB
C++
//
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// Copyright(c) 2015 Gabi Melman.
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// Distributed under the MIT License (http://opensource.org/licenses/MIT)
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//
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//
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// spdlog usage example
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//
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#include "spdlog/spdlog.h"
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#include <cstdlib> // EXIT_FAILURE
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#include <iostream>
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#include <memory>
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void async_example();
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void syslog_example();
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namespace spd = spdlog;
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int main(int, char*[])
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{
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try
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{
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// Multithreaded color console
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auto console = spd::stdout_logger_mt("console", true);
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console->info("Welcome to spdlog!");
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console->info("An info message example {}..", 1);
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console->info() << "Streams are supported too " << 1;
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// Formatting examples
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console->info("Easy padding in numbers like {:08d}", 12);
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console->info("Support for int: {0:d}; hex: {0:x}; oct: {0:o}; bin: {0:b}", 42);
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console->info("Support for floats {:03.2f}", 1.23456);
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console->info("Positional args are {1} {0}..", "too", "supported");
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console->info("{:<30}", "left aligned");
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console->info("{:>30}", "right aligned");
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console->info("{:^30}", "centered");
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spd::get("console")->info("loggers can be retrieved from a global registry using the spdlog::get(logger_name) function");
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// Runtime log levels
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spd::set_level(spd::level::info); //Set global log level to info
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console->debug("This message shold not be displayed!");
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console->set_level(spd::level::debug); // Set specific logger's log level
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console->debug("This message shold be displayed..");
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// Create a file rotating logger with 5mb size max and 3 rotated files
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auto file_logger = spd::rotating_logger_mt("file_logger", "logs/mylogfile", 1048576 * 5, 3);
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for (int i = 0; i < 10; ++i)
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file_logger->info("{} * {} equals {:>10}", i, i, i*i);
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// Create a daily logger - a new file is created every day on 2:30am
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auto daily_logger = spd::daily_logger_mt("daily_logger", "logs/daily", 2, 30);
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// Customize msg format for all messages
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spd::set_pattern("*** [%H:%M:%S %z] [thread %t] %v ***");
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file_logger->info("This is another message with custom format");
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// Compile time debug or trace macros.
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// Enabled #ifdef SPDLOG_DEBUG_ON or #ifdef SPDLOG_TRACE_ON
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SPDLOG_TRACE(console, "Enabled only #ifdef SPDLOG_TRACE_ON..{} ,{}", 1, 3.23);
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SPDLOG_DEBUG(console, "Enabled only #ifdef SPDLOG_DEBUG_ON.. {} ,{}", 1, 3.23);
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// Asynchronous logging is very fast..
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// Just call spdlog::set_async_mode(q_size) and all created loggers from now on will be asynchronous..
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async_example();
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// syslog example. linux/osx only..
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syslog_example();
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// Release and close all loggers
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spdlog::drop_all();
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}
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catch (const spd::spdlog_ex& ex)
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{
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std::cout << "Log failed: " << ex.what() << std::endl;
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return EXIT_FAILURE;
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}
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return EXIT_SUCCESS;
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}
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void async_example()
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{
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size_t q_size = 4096; //queue size must be power of 2
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spdlog::set_async_mode(q_size);
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auto async_file = spd::daily_logger_st("async_file_logger", "logs/async_log.txt");
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for (int i = 0; i < 100; ++i)
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async_file->info("Async message #{}", i);
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}
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//syslog example (linux/osx only)
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void syslog_example()
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{
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#if defined (__linux__) || defined(__APPLE__)
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std::string ident = "spdlog-example";
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auto syslog_logger = spd::syslog_logger("syslog", ident, LOG_PID);
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syslog_logger->warn("This is warning that will end up in syslog. This is Linux only!");
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#endif
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}
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// Example of user defined class with operator<<
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class some_class {};
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std::ostream& operator<<(std::ostream& os, const some_class&)
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{
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return os << "some_class";
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}
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void custom_class_example()
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{
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some_class c;
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spdlog::get("console")->info("custom class with operator<<: {}..", c);
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spdlog::get("console")->info() << "custom class with operator<<: " << c << "..";
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}
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