2018-04-20 06:20:19 -04:00
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//
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2016-04-20 04:57:49 -04:00
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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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2016-08-22 13:52:16 -04:00
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//
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2017-06-17 17:42:31 -04:00
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2016-04-20 04:57:49 -04:00
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#include <iostream>
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2018-07-07 05:53:56 -04:00
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void stdout_example();
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2018-07-07 05:37:17 -04:00
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void basic_example();
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void rotating_example();
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void daily_example();
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2016-04-20 04:57:49 -04:00
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void async_example();
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2016-07-22 11:06:36 -04:00
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void user_defined_example();
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2016-08-04 20:56:40 -04:00
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void err_handler_example();
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2018-06-10 16:01:46 -04:00
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void syslog_example();
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2016-04-20 04:57:49 -04:00
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2018-07-07 05:53:56 -04:00
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#include "spdlog/spdlog.h"
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2018-03-09 08:26:33 -05:00
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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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2018-07-07 05:53:56 -04:00
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// console logging example
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stdout_example();
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2018-04-20 06:20:19 -04:00
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2018-07-07 05:37:17 -04:00
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// various file loggers
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basic_example();
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rotating_example();
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daily_example();
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// async logging using a backing thread pool
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2018-05-26 18:29:13 -04:00
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async_example();
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// user defined types logging by implementing operator<<
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user_defined_example();
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// custom error handler
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err_handler_example();
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2018-07-07 05:53:56 -04:00
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// apply some function on all registered loggers
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spdlog::apply_all([&](std::shared_ptr<spdlog::logger> l) { l->info("End of 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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// Exceptions will only be thrown upon failed logger or sink construction (not during logging)
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catch (const spdlog::spdlog_ex &ex)
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{
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std::cout << "Log init failed: " << ex.what() << std::endl;
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return 1;
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}
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}
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2018-07-07 08:03:34 -04:00
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#include "spdlog/sinks/stdout_color_sinks.h" // or "/sinks/stdout_sinks.h" if no colors needed
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void stdout_example()
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{
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// create color multi threaded logger
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auto console = spdlog::stdout_logger_mt("console");
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console->info("Welcome to spdlog!");
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console->error("Some error message with arg: {}", 1);
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2018-07-07 07:04:31 -04:00
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auto err_logger = spdlog::stderr_logger_mt("error_logger");
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err_logger->error("Some error message");
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// Formatting examples
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console->warn("Easy padding in numbers like {:08d}", 12);
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console->critical("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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spdlog::get("console")->info("loggers can be retrieved from a global registry using the spdlog::get(logger_name)");
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// Runtime log levels
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spdlog::set_level(spdlog::level::info); // Set global log level to info
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console->debug("This message should not be displayed!");
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console->set_level(spdlog::level::trace); // Set specific logger's log level
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console->debug("This message should be displayed..");
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// Customize msg format for all loggers
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spdlog::set_pattern("[%H:%M:%S %z] [%^---%L---%$] [thread %t] %v");
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console->info("This an info message with custom format");
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// Compile time log levels
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// define SPDLOG_DEBUG_ON or 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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}
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#include "spdlog/sinks/basic_file_sink.h"
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void basic_example()
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{
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// Create basic file logger (not rotated)
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auto my_logger = spdlog::basic_logger_mt("basic_logger", "logs/basic-log.txt");
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}
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#include "spdlog/sinks/rotating_file_sink.h"
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void rotating_example()
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{
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// Create a file rotating logger with 5mb size max and 3 rotated files
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auto rotating_logger = spdlog::rotating_logger_mt("some_logger_name", "logs/rotating.txt", 1048576 * 5, 3);
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}
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#include "spdlog/sinks/daily_file_sink.h"
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void daily_example()
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{
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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 = spdlog::daily_logger_mt("daily_logger", "logs/daily.txt", 2, 30);
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}
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2018-04-13 20:47:26 -04:00
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#include "spdlog/async.h"
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void async_example()
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{
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2018-07-07 05:12:45 -04:00
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// default thread pool settings can be modified *before* creating the async logger:
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// spdlog::init_thread_pool(32768, 1); // queue with max 32k items 1 backing thread.
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auto async_file = spdlog::basic_logger_mt<spdlog::async_factory>("async_file_logger", "logs/async_log.txt");
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// alternatively:
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// auto async_file = spdlog::create_async<spdlog::sinks::basic_file_sink_mt>("async_file_logger", "logs/async_log.txt");
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for (int i = 1; i < 101; ++i)
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{
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async_file->info("Async message #{}", i);
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2018-06-01 10:52:05 -04:00
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}
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2016-04-20 04:57:49 -04:00
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}
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2016-07-22 13:19:26 -04:00
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// user defined types logging by implementing operator<<
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#include "spdlog/fmt/ostr.h" // must be included
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struct my_type
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{
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int i;
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template<typename OStream>
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friend OStream &operator<<(OStream &os, const my_type &c)
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{
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return os << "[my_type i=" << c.i << "]";
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}
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};
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void user_defined_example()
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{
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spdlog::get("console")->info("user defined type: {}", my_type{14});
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}
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2016-08-04 20:56:40 -04:00
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//
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2018-03-09 08:26:33 -05:00
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// custom error handler
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2016-08-04 20:56:40 -04:00
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//
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void err_handler_example()
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2016-08-04 21:43:20 -04:00
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{
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// can be set globally or per logger(logger->set_error_handler(..))
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spdlog::set_error_handler([](const std::string &msg) { spdlog::get("console")->error("*** LOGGER ERROR ***: {}", msg); });
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spdlog::get("console")->info("some invalid message to trigger an error {}{}{}{}", 3);
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}
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// syslog example (linux/osx/freebsd)
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#ifndef _WIN32
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#include "spdlog/sinks/syslog_sink.h"
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void syslog_example()
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{
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std::string ident = "spdlog-example";
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auto syslog_logger = spdlog::syslog_logger("syslog", ident, LOG_PID);
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syslog_logger->warn("This is warning that will end up in syslog.");
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}
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#endif
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// Android example
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#if defined(__ANDROID__)
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#incude "spdlog/sinks/android_sink.h"
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void android_example()
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{
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std::string tag = "spdlog-android";
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auto android_logger = spdlog::android_logger("android", tag);
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android_logger->critical("Use \"adb shell logcat\" to view this message.");
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}
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#endif
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