How to Implement MDC-Like Logging in GoLang?

Achieving MDC Logging in GoLang

In Java, MDC (Mapped Diagnostic Context) logging allows developers to add contextual information to log messages. This information is typically used to trace concurrent requests by adding UUIDs to all server logs.

GoLang Solution

Unlike Java, GoLang does not natively support thread local storage, which MDC logging relies on. However, a similar effect can be achieved by utilizing the context package to thread a context through the application stack.

Implementing MDC-Like Logging

To implement MDC-like logging in GoLang:

1. Create middleware that adds a request ID to the context of a web request.
2. Pass the context throughout the application stack.
3. Pull out the request ID from the context and use it in logging functions.

Here's an example of a custom logger function:

<code class="go">func logStuff(ctx context.Context, msg string) {
    log.Println(ctx.Value("requestId"), msg) // call stdlib logger
}</code>

Additional Notes

The implementation of MDC-like logging in GoLang may vary depending on the specific requirements of your application. Ensure that the added metadata is handled appropriately throughout the logging and tracing infrastructure.

The above is the detailed content of How to Implement MDC-Like Logging in GoLang?. For more information, please follow other related articles on the PHP Chinese website!