How to make Micronaut create Beans from a custom Library?

Question

I tried the steps as described in the following article

Or same as in this GitHub post

It didn't work for me.

I also read this approach: See here But this is not what I am searching for

How can I customize my Library in a way, to make Micronaut capable of creating and injecting its beans directly in my project?

Answer 1

How can I customize my Library in a way, to make Micronaut capable of creating and injecting its beans directly in my project?

If you want to customize the library, compile it with a dependency on the appropriate compile time annotation processors and then consume that .jar in your Micronaut app the same way you would any other .jar. plugins.gradle.org/plugin/io.micronaut.library is helpful for that if you are using Gradle.

If you are consuming a library for which you can't do that, the @Factory annotation is specifically for this.

@Factory
class MyFactory {

    @Singleton
    SomeLibraryType someMethod() {
        // this could contain any appropriate
        // initialization code...
        return new SomeLibraryType();
    }
}

See docs.micronaut.io/3.4.2/guide/#factories.