spdlog/example/example.cpp

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/*************************************************************************/
/* spdlog - an extremely fast and easy to use c++11 logging library. */
/* Copyright (c) 2014 Gabi Melman. */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/*************************************************************************/
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//
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// spdlog usage example
//
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#include <iostream>
#include "spdlog/spdlog.h"
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int main(int, char* [])
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{
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namespace spd = spdlog;
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try
{
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std::string filename = "logs/spdlog_example";
// Set log level to all loggers to DEBUG and above
spd::set_level(spd::level::DEBUG);
//Create console, multithreaded logger
auto console = spd::stdout_logger_mt("console");
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console->info("Welcome to spdlog!") ;
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console->info("An info message example", "...", 1, 2, 3.5);
console->info() << "Streams are supported too " << std::setw(5) << std::setfill('0') << 1;
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//Create a file rotating logger with 5mb size max and 3 rotated files
auto file_logger = spd::rotating_logger_mt("file_logger", filename, 1024 * 1024 * 5, 3);
file_logger->info("Log file message number", 1);
for (int i = 0; i < 100; ++i)
{
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file_logger->info(i, "in hex is", "0x") << std::hex << std::uppercase << i;
}
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spd::set_pattern("*** [%H:%M:%S %z] [thread %t] %v ***");
file_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");
SPDLOG_TRACE(file_logger, "This is a trace message (only #ifdef _DEBUG)", 123);
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//
// Asynchronous logging is easy..
// Just call spdlog::set_async_mode(max_q_size) and all created loggers from now on will be asynchronous..
//
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size_t max_q_size = 100000;
spdlog::set_async_mode(max_q_size);
auto async_file= spd::daily_logger_st("async_file_logger", "async_" + filename);
async_file->info() << "This is async log.." << "Should be very fast!";
//
// syslog example
//
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#ifdef __linux__
auto syslog_logger = spd::syslog_logger("syslog");
syslog_logger->warn("This is warning that will end up in syslog. This is Linux only!");
#endif
}
catch (const spd::spdlog_ex& ex)
{
std::cout << "Log failed: " << ex.what() << std::endl;
}
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return 0;
}
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