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Added mdc example

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gabime 2024-04-30 13:11:01 +03:00
parent 3b4fd93bd0
commit 2d4acf8cc3
1 changed files with 15 additions and 0 deletions
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example/example.cpp
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@ -26,6 +26,7 @@ void udp_example();
void custom_flags_example();
void file_events_example();
void replace_default_logger_example();
void mdc_example();
#include "spdlog/spdlog.h"
#include "spdlog/cfg/env.h" // support for loading levels from the environment variable
@ -84,6 +85,7 @@ int main(int, char *[]) {
custom_flags_example();
file_events_example();
replace_default_logger_example();
mdc_example();
// Flush all *registered* loggers using a worker thread every 3 seconds.
// note: registered loggers *must* be thread safe for this to work correctly!
@ -376,3 +378,16 @@ void replace_default_logger_example() {
spdlog::set_default_logger(old_logger);
}
// Mapped Diagnostic Context (MDC) is a map that stores key-value pairs (string values) in thread local storage.
// Each thread maintains its own MDC, which loggers use to append diagnostic information to log outputs.
// Note: it is not supported in asynchronous mode due to its reliance on thread-local storage.
#include "spdlog/mdc.h"
void mdc_example()
{
spdlog::mdc::put("key1", "value1");
spdlog::mdc::put("key2", "value2");
// if not using the default format, you can use the %& formatter to print mdc data as well
spdlog::set_pattern("[%H:%M:%S %z] [%^%L%$] [%&] %v");
spdlog::info("Some log message with context");
}