@PostConstruct not working in @FacesValidator

https://stackoverflow.com/questions/10789526

11-06-2021
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Question

Is the post construct annotation not supported in validators?

I have a application scoped jndi servicelocator bean which I inject as a managed property into my validator.

@ManagedProperty(value = "#{jndiServiceLocatorBean}")
private final JndiServiceLocatorBean jndiServiceLocatorBean = null;

The post construct annotated method to initialize my necessary remote bean is never invoked and so my remote bean remains null.

private UserBeanRemote userBeanRemote = null;

@PostConstruct
public void postConstruct()
{
    this.userBeanRemote = (UserBeanRemote) this.jndiServiceLocatorBean.getRemoteBean(UserBeanRemote.class);
}

Solution

It works only if the Validator is annotated as a @ManagedBean or @Named instead of @FacesValidator.

Just use the normal constructor instead.

@FacesValidator("fooValidator")
public class FooValidator implements Validator {

    private UserBeanRemote userBeanRemote;

    public FooValidator() {
        FacesContext context = FacesContext.getCurrentInstance();
        JndiServiceLocatorBean jndiServiceLocatorBean = context.getApplication().evaluateExpressionGet(context, "#{jndiServiceLocatorBean}", JndiServiceLocatorBean.class);
        this.userBeanRemote = (UserBeanRemote) jndiServiceLocatorBean.getRemoteBean(UserBeanRemote.class);
    }

    // ...
}

Support for dependency injection in JSF artifacts other than @ManagedBean is planned for JSF 2.2 (spec issue 763).

@PostConstruct not working in @FacesValidator

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