[GROOVY-4213] add a local transform for logging

• Type: Improvement
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 1.8-beta-1
• Assignee: Jochen Theodorou
• Reporter: Jochen Theodorou
• Created: 20/May/10 09:36
• Updated: 04/Aug/10 14:12
• Resolved: 20/May/10 09:49

Description

At the GR8 conference in Kobenhagen a group decided to write a local transform to supply an injection like logging ability as part of the hackergarten. This transform injects a field named log, initialized with a logger java.util.Logger and will replace all method calls on all free variables named "log" with an surrounding if to avoid the evaluation of costly expressions

log.info(database.getTheQuestionFor42()) //takes a lot of time

will be transformed to

if (log.isLoggable(Level.INFO)) {           // doesn't take long
  log.info(database.getTheQuestionFor42())  // this still does
}

Issue Links

• is related to: GROOVY-973 provide a simple yet powerful logging facility