CODEWITHSUNDEEP
cdiquarkus
Yurii Kachmar
Yurii Kachmar

Reputation: 86

Calling of postConstruct and preDestroy methods of beans in Quarkus

Here is a brief overview of a problem:

I want to call bean lifecycle methods without restarting an application. I need to call interceptor methods (PostConstruct and PreDestroy) of superclasses during reloading of beans in Quarkus and CDI/Weld.

For example, I have end-point for that: /reload - it fires bean reload where I need to go through all beans annotated with my custom annotation and call(if such an annotation presents) posconstr and predestr annotations, BUT I want to preserve bean call order (if bean extends superclass that has such lifecycle callback, then I want to call it first).

What I did to fix it: I used a reflection to call them. But I think it is a kind of dirty fix and hope there should be a more wise solution. There is a solution using CDI:

beanManager.getInjectionTargetFactory(
            beanManager.createAnnotatedType(instance.getClass())).createInjectionTarget(
            bean).postConstruct(instance)

CDI has getInjectionTargetFactory in beanManager, Quarkus does not support this method. It works but I search solution using Quarkus methods.

Does Quarkus have a possibility to call postConstruct and preDestroy methods of all beans without restarting an application?

Upvotes: 1

Views: 9894

Answers (1)

loicmathieu
loicmathieu

Reputation: 5562

You can use the regular CDI annotations @PostConstruct and @PreDestroy on your beans. Quarkus will honor them.

For example:

import javax.annotation.PostConstruct;
import javax.annotation.PreDestroy;
import javax.enterprise.context.ApplicationScoped;

@ApplicationScoped
public class MyBean {
    @PostConstruct
    void init() {
        // do something
    }

    @PreDestroy
    void destroy() {
        // do something
    }
}

Be careful that they will be called at bean initialization and destruction time not application initialization and destruction time, for this there is specific event that you can listen on : https://quarkus.io/guides/lifecycle#listening-for-startup-and-shutdown-events

Upvotes: 5

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