TransformService.java

public boolean transformAndPersist(List<String> result, String outputDir, String timbermillParentId) {
  String id = TimberLogger.start("transform_and_persist", timbermillParentId);
  try{
    authorize(id);

    runTransformation(result);
    boolean isSuccess = persistToDisk(outputDir);

    TimberLogger.success();
    return isSuccess;
  } catch (Throwable t){
    TimberLogger.error(t);
    throw t;
  }
}

@TimberLog(name = "transform")
private void runTransformation(String result) {
  TimberLogger.logText("listToTransform", result);
  ...
}

@TimberLog(name = "persist")
private boolean persistToDisk(String outputDir) {
  TimberLogger.logText("outputDir", outputDir);
  ...
}