CDI - Observing Container Events

Question

I am trying to observe both the startup and shutdown events for a CDI web application. I have an ApplicationScoped bean that listens for those events:

@ApplicationScoped
public class PrettyfacesStartupObserver
{
    private static final Log LOGGER = LogFactory.getLog(PrettyfacesStartupObserver.class);

    public PrettyfacesStartupObserver()
    {
        LOGGER.debug("\n\n\n\n\n\n\n\n\n\nconstructor");
    }

    public void onStartup(@Observes
    AfterBeanDiscovery afterBeanDiscovery
                                             )
    {
        LOGGER.debug("\n\n\n\n\n\n\n\n\n\nafter bean discover");
    }

    public void onStartup(@Observes
    AfterDeploymentValidation afterDeploymentValidation
                                             )
    {
        LOGGER.debug("\n\n\n\n\n\n\n\n\n\n\nafter deployment validation");
    }

    public void onShutdown(@Observes
    BeforeShutdown beforeShutdown
                                                )
    {
        LOGGER.debug("\n\n\n\n\n\n\n\n\n\n\nbefore shutdown:" + beforeShutdown);
    }

I don't see anything in the logs.

What am I missing?

I have an empty beans.xml in this archive. I don't believe this bean ever gets constructed as I don't see any log statements produced by it. — , Aug 24 '10 at 12:16
Na, I tried that along with System.exit, both were a no go. It's never being called. Here is what I'm trying to run: http://github.com/walterjwhite/prettyfaces.extension.sitemap http://github.com/walterjwhite/prettyfaces-tests mvn clean package embedded-glassfish:run -P Glassfish,development — , Aug 24 '10 at 21:19
Check out the weld and cdi-jee6 branches. Let me know if that works for you. — , Aug 24 '10 at 21:22
I need to use @Stateless instead of @ApplicationScoped on the class. Also, my after deployment validation and before shutdown method aren't being called? — , Aug 25 '10 at 02:17

score 15 · Accepted Answer · answered Aug 27 '10 at 22:59

15

Thanks to Pete Muir, the solution was to implement the Extension interface. Once I did that, along with creating a special file, it worked perfectly.

The thing to remember is, if you want to observe (or act on) container events, you must implement the extension interface as it is a special event.

https://docs.jboss.org/weld/reference/latest/en-US/html/extend.html#d0e4984

Walter

answered Aug 27 '10 at 22:59

Thanks for posting this. +1 all around. – Pascal Thivent Aug 29 '10 at 01:28
2

You mention creating a special file. What file was that? – Daniel Lyons Aug 04 '11 at 19:34

score 7 · Answer 2 · edited Apr 03 '12 at 18:53

7

The "special file" mentioned by Walter White is:

META-INF/services/javax.enterprise.inject.spi.Extension

That file should contain the fully-qualified name of your Extension class. ie:

org.mydomain.extension.MyExtension

edited Apr 03 '12 at 18:53

ondrej kosatka

458
4
7

answered Dec 15 '11 at 00:06

George Armhold

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CDI - Observing Container Events

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