CODEWITHSUNDEEP
spring-bootvaadin
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FoufaFaFa

Reputation: 39

Spring boot vaadin project @Autowired

I am using spring boot vaadin project.I have a repository like this:public interface PersonneRepository extends JpaRepository<Person, Integer>, JpaSpecificationExecutor {}

I want to instantiate this repository in my class .In Ui and in Views I do this: @Autowired PersonneRepository repo; this work easily but in simple class(public class x{}) repo return null .And I don't like to passe it in parameter or session .Have you any idea please?

Upvotes: 0

Views: 1382

Answers (1)

agassner
agassner

Reputation: 689

To inject dependencies the dependent classes have to be managed by Spring. This can be achieved with the class annotation @Component:

Indicates that an annotated class is a "component". Such classes are considered as candidates for auto-detection when using annotation-based configuration and classpath scanning.

For use in Vaadin classes @SpringComponent it's recommended:

Alias for {@link org.springframework.stereotype.Component} to prevent conflicts with {@link com.vaadin.ui.Component}.

Example:

@Repository // Indicates that an annotated class is a "Repository", it's a specialized form of @Component
public interface PersonRepository extends JpaRepository<Person, Long> {
    // Spring generates a singleton proxy instance with some common CRUD methods
}

@UIScope // Implementation of Spring's {@link org.springframework.beans.factory.config.Scope} that binds the UIs and dependent beans to the current {@link com.vaadin.server.VaadinSession}
@SpringComponent
public class SomeVaadinClassWichUsesTheRepository {

    private PersonRepository personRepository;

    @Autowired // setter injection to allow simple mocking in tests
    public void setPersonRepository(PersonRepository personRepository) {
        this.personRepository = personRepository;
    }

    /**
     * The PostConstruct annotation is used on a method that needs to be executed after dependency injection is done to perform any initialization.
     */ 
    @PostConsruct
    public init() {
        // do something with personRepository, e.g. init Vaadin table...
    }
}

Upvotes: 2

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