JSON Template Layout - logger - only the class name without the package

[amosshi]

In the JSON Template Layout document it reads:

If you find yourself using pattern, it is highly likely you are either doing something wrong, or JSON Template Layout needs some improvement.

The Problem

In today, JSON Template Layout has no way to generate logger Class Name without the Java package

logger event template grammar
config = "field" -> ( "name" | "fqcn" )

Well usually the Java package is too long and we want to skip it to save disk space, especially for a high traffic data center.

The Pattern Solution

In Pattern layout we can achieve it easily via "%c{1} , while there is no such option in JSON Template Layout unfortunately.

  "logger": {
    "$resolver": "pattern",
    "pattern": "%c{1}",
  }

The Idea

How about add a new option for logger, like shortName, which only generate the class name without the package.

[vy]

@amosshi, thanks so much for the feedback. I think your use case is a perfectly valid PatternLayout-fallback – it would be an utter non-sense to duplicate the entire %c machinery of PL in JTL.

The JTL manual paragraph motivated your report was written at a time when JTL was not mature enough with its own directive ecosystem, and several users were falling back to PL for things that should have actually been part of the JTL ecosystem. I think this trend has disappeared over time as JTL ecosystem has matured. It is certainly time to revise that part of the JTL documentation and inform users on valid use cases – created #3895 for this purpose.