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Added mdc example to readme

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gabime 2024-04-30 13:14:29 +03:00
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@ -437,7 +437,22 @@ MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent)
logger->info("Some info message");
}
```
---
#### Mapped Diagnostic Context
```c++
// 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, use the %& formatter to print mdc data
// spdlog::set_pattern("[%H:%M:%S %z] [%^%L%$] [%&] %v");
}
```
---
## Benchmarks