Techland

In the previous post on the AdditionalBeanBuildItem, we discussed how to reference a bean with the ARC dependency manager. While useful, there are cases where you need the manager to inject a specific instance of a pre-configured bean. Since AdditionalBeanBuildItem only accepts a bean class as a parameter, it cannot be used for this purpose. This is where the SyntheticBeanBuildItem comes into play. Use Case Imagine your extension needs to provide a configuration as an injectable bean to communicate with a third-party API.

In the previous post about the AdditionalBeanBuildItem, we saw how to reference a bean in the ARC dependency manager. This is very convenient, but in some cases, we want the manager to inject a specific instance of an already configured bean. Since AdditionalBeanBuildItem only takes a bean class as a parameter, it can’t be used for this. This is where SyntheticBeanBuildItem comes in. Use Case Imagine your extension wants to provide a configuration as an injectable bean to communicate with a third-party API.

After discussing the ApplicationIndexBuildItem and CombinedIndexBuildItem, let’s continue exploring Quarkus build items with the AdditionalBeanBuildItem. This build item is part of the configuration items for the Arc library , which handles dependency injection in Quarkus. Quarkus and Dependency Injection Quarkus heavily relies on dependency injection, allowing for loose coupling between different objects in a Quarkus application. Quarkus uses a library called Arc that automatically scans the application’s classpath and references all classes declared as beans (e.

Quarkus has a very powerful extension system based on the concept of BuildItem. Each BuildItem allows you to configure an extension in a specific way. However, the documentation for these BuildItems is very incomplete. Among the hundreds of BuildItems that exist, I propose to study two of them in this post. Let’s focus on ApplicationIndexBuildItem and CombinedIndexBuildItem. A Story of Jandex Quarkus needs to gather information about the application at build time.