Example Project to Demonstrate Micronaut Injection Issue.

Problem

A @Factory class which makes use of @EachBean is not properly applied to a bean which has an @EachProperty annotation, which the @Factory is intended to replace.

The bean in question is a class within an external library which is annotated with @EachProperty. To enable configuration of this bean in a test environment, we were unable to configure the class in the standard way. Instead, we created a @Factory class to create the bean using our own configuration sections, and intentionally do not use the @EachProperty annotation on the bean class.

This functioned correctly when using Micronaut 3.x, but fails in Micronaut 4.x.

Steps to Reproduce

This project contains a single test which demonstrates the issue.

./gradlew test

This fails due to the bean not being found in the Micronaut context.

Classes used in this setup:

• SomeBean - The bean we are attempting to create with a @Factory, but which is already annotated with @EachProperty
• SomeFactory - The factory class which creates the bean - intended to be used instead of the bean's own @EachProperty annotation
• SomeBeanConfig - configuration class used in conjunction with the factory to create the bean
• ServiceThing - a simple @Context bean which uses the bean in question - used to force Micronaut to inject the bean.
• WrappedSomeBeam - a wrapper class which demonstrates a workaround for the issue
• DemoTest - simple test which verifies the Micronaut context. The test fails because the bean is not found.

Known Workaround

The issue appears to be a conflict between the @EachProperty annotation and the @Factory annotation. Since the bean in question is in an external library, we cannot remove the @EachProperty annotation. However, we can create a trivial subclass "wrapper" class which is not annotated with @EachProperty. This wrapper class can then be injected into the application in place of the original bean.