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POPostConstruct in CDI SessionScoped managed beans
 

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    <p>Short story: I have a CDI <code>@SessionScoped</code> bean (annotation from <code>javax.enterprise.context</code> and not from <code>javax.faces</code>) called <code>UserContextBean</code>. I'd like to actually do something when an HTTP session is created. </p> <p>So naturally I assumed that <code>@PostConstruct</code> would do the trick: get called only once when an instance of this bean is constructed. However, as per the documentation <a href="http://docs.oracle.com/javaee/6/tutorial/doc/gmgkd.html" rel="nofollow">here</a>, they say that the PostConstruct method is called :</p> <blockquote> <p>When the managed bean is injected into a component, CDI calls the method after all injection has occurred and after all initializers have been called.</p> </blockquote> <p>I had assumed that the post construct method would be called once, per session. However, practice is consistent with the documentation. This bean is injected into a <code>@RequestScoped</code> bean (also CDI) which serves as a backing bean for a JSF page and the PostConstruct method is called <strong>for every request</strong>. </p> <p>I realize (now) that this is the behavior. But would there be any other way of doing a one time per session initialization? </p> <p>Some code, although not very relevant:</p> <pre><code>@Named(UserContextBean.BEAN_NAME) @SessionScoped public class UserContextBean implements Serializable { ... @PostConstruct private void createSession() { System.out.println("UserContext created."); } } </code></pre> <p>The request scoped bean where I inject this:</p> <pre><code>public abstract class WebPageDataProvider extends AbstractViewDataProvider { @Inject private UserContextBean userContext; </code></pre> <p>I was also thinking to use an <code>HttpSessionListener</code> and initialize the session bean, but it already sounds messy.</p> <p><strong>EDIT</strong></p> <p>Just noticed now that the HTTP session is not even created. If I create the session "manually", by calling <code>getSession(true)</code> (I do this inside a phase listener, for testing purposes, but only because it was already there) then everything works as expected. </p>
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    1. USMarcel N.
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    1. COHow is your UI built?
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      1. USJohn Ament
    2. CO@JohnAment: Well, it's JSF 2 (Mojarra). The specific page I'm testing with is very simple. It's derived from a template and just brings together a couple of facelets. The EL expression that uses the request scoped bean is in the actual page, not in the facelets and just accesses a text property in the bean (which uses the user context bean to get a user role).
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    3. COOk, good. Sorry, what about CDI implementation and container? If you're using tomcat, are you using CDI via servlet?
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