Custom configuration for your Slf4j logger

[ctrleno]

Hi,

I hope this issue finds you well! :)

I am reaching out to see if there is a way to have a custom configuration when using Slf4j without the need to create a custom logger. Not sure if this use case can be considered specific enough to the point that it wouldn't bring value to the community, below I will explain the use-case and discuss further.

Let's say I have a controller, service, or any format of a class, I am using SLF4J for logging.

@Slf4j
public class ServiceBaseImpl implements MyInterface{
    public void myMethod(Param param){
      log.info("Logging param {}", param);
    }
}

What I mean by custom configuration is that I want to enforce a specific logging contract to my team that contributes to the services that we work on, so that we have one, single logging contract that everyone is enforced to use because the configuration says so.

Let's say I have multiple services, and I want the logging to be the same on all of them, by logging I mean the format and what is logged, asking someone to just do it, not really effective as after some time people tend to just log what they need so I was thinking to have something like the following:

@Slf4j
public class ServiceBaseImpl implements MyInterface {
    
    /*
        * Example method to demonstrate logging
        * request-in - indicates the start of a request processing, as a request comes in
        * start - indicates the beginning of the method execution
        * service-name - specifies the name of the service being invoked
        * message - provides additional context or information about the request
        * myParam - parameter passed to the method
     */
    public void myMethod(String myParam) {
        log.info("request-in", "start", "service-name", "message", myParam...)
    }
}

These parameters would always be required based on a specific configuration created for the SLF4J logging in that specific application.

The configuration would be something like:

@Configuration
public class Slf4jLoggingConfiguration {

    public void configure(){
        // Configuration logic here
        // always require request position logging
        // always require beginning or end of method execution
        // always require service-name for logging
        // always require message
        // ...
    }
}

Please let me know if you need more details, as I tried to explain it the best I could. Thank you very much for everything that you do for the community! <3

[ctrleno]

Hi @ceki, hope you are doing good!

I see that you assigned this to yourself, does that mean that you'll be working on this? Just checking to know if we can expect this in the near future or should we go towards a custom implementation to achieve this (I don't really like this as I don't want to have logger code maintenance but rather focus on other things).

Thank you once again for your time!

[ceki]

@ctrleno I find the request quite interesting. Nevertheless, I am quite swamped at the moment and won't have the time to implement such an extension (nor absorb an external contribution) in the near future.