[LOG4J2-3319] Add minimal support for log4j 1.2 API bundle usage in Eclipse IDE

• Type: Improvement
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 2.12.4
• Component/s: Core, Log4j 1.2 bridge, OSGi
• Assignee: Unassigned
• Reporter: Benjamin Röhl
• Created: 05/Jan/22 09:21
• Updated: 01/Mar/23 07:05

Description

Status Quo

The "log4j core" and "log4j 1.2 api" library (and others as well) are build as bundle.

The compatibility library is build as fragment.

Problem

Using the log4j core and 1.2 api library in Eclipse-runtime (via target platform) does not properly work out, since the 1.2 api fragment bundle is extending the core bundle's api, by declaring extra Export-Packages statements for log4j 1.2 api.

Unfortunately Eclipse is not capable of resolving those extra added API (via Export-Packages) from a fragement, even though at runtime it is supposed to work.

Solution Proposal

Add the following bundle manifest header to core bundle, to support the extra added API by the 1.2 api fragement bundle:

Eclipse-ExtensibleAPI: true

Please see The Eclipse-ExtensibleAPI Header section of Eclipse's Platform Plugin-In Developer Guide documentation.

Issue Links

• links to: GitHub Pull Request #689