[LOG4J2-2732] Add ThreadContext.putIfNull(String, String)

• Type: New Feature
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 2.13.0
• Component/s: API
• Assignee: Unassigned
• Reporter: Matt Pavlovich
• Created: 06/Dec/19 17:15
• Updated: 10/Dec/19 15:07
• Resolved: 07/Dec/19 04:23

Description

Provide a helper method that provides a 1-liner to put an identifier only if it is not currently set. This removes an if-check in all classes that share a design approach of assessing a uniqueId, such as request id, etc.

if(!ThreadContext.containsKey("uniqueId")) {
   ThreadContext.put("uniqueId", generateUniqueId());
}

Proposed:

ThreadContext.putIfNull("uniqueId", generateUniqueId());

Issue Links

• links to: GitHub Pull Request #318