Support to print logs based on a condition

[aneeshrelan]

Example:

logger.warn("Exceeded maximum retries to fetch details", count => count > 3);

will only print the log when the condition is met

[su-mit]

Hi @aneeshrelan, I would like to work on this issue can u please provide some more context over it

[aneeshrelan]

Hey @su-mit

We want to log the line to actually execute based on a provided condition. This is useful in case of heavy processing code (>10k ops per sec) and while it is good to log every event, it's best to log at a verbose level (debug, trace) and log some aggregate results at an INFO level

Similarly the original example, where we might have exponential retries put in and should log after every 5 failed retries

Example: logger.warn("Retry failed", count => count % 5 === 0)

For the implementation, the logger method currently allows the following:

1. logger.level("Simple Message");
2. logger.level("Processed user", {id: <user-id>, name: <user-name>})

So, we should have a method of the prototype:

logger.level(msg: string);

logger.level(msg: string, Record<string, unknown>);

logger.level(msg: string, Record<string, unknown>, EvaluationFunction: Function);

logger.level(msg: string, EvaluationFunction: Function);

Hope this helps, feel free to comment if you have more questions