Matt Sicker created LOG4J2-2854:
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Summary: Create standardized dependency injection API
Key: LOG4J2-2854
URL: https://issues.apache.org/jira/browse/LOG4J2-2854
Project: Log4j 2
Issue Type: New Feature
Components: Core
Reporter: Matt Sicker
Assignee: Matt Sicker
In the 2.x plugin API, we do not have a generic dependency injection mechanism.
We do have a similar system in Configuration for injection configuration data
into Core plugins. There are other attempts at user configuration injection
into other classes through system properties as well.
In the 3.0 API, a more generic and unified dependency injection API should be
provided. This should be analogous to how the [standard javax.inject
API|https://docs.oracle.com/javaee/6/api/javax/inject/Inject.html] works. This
should include a way to specify how a class can be instantiated through either
{{@Inject}} on the constructor or {{@Produces}} on a method. The produces
version should replace the existing methods of binding configuration data to
the {{@Plugin(Builder)Factory}} annotations. Combined with scopes
(LOG4J2-2852) and qualifiers (LOG4J2-2853), this will allow for a lot of code
in log4j-core to be refactored to remove boilerplate code related to object
construction and lifecycle management.
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