Re: [OS-webwork] issue with ApplicationLifecycleListener

[Erik Hatcher]

Here are further details on this issue:

I turned ApplicationLifecycleListener into a  
ServletContextAttributeListener too, with these methods added:

    public void attributeAdded(ServletContextAttributeEvent event) {
        log.info("event = " + event.getName());
    }
    public void attributeRemoved(ServletContextAttributeEvent event) {
        log.info("event = " + event.getName());
    }
    public void attributeReplaced(ServletContextAttributeEvent event) {
        log.info("event = " + event.getName());
    }
Here is the relevant order of events:

Aug 4, 2003 11:19:37 AM
com.opensymphony.webwork.lifecycle.ApplicationLifecycleListener
contextInitialized
INFO: application = [EMAIL PROTECTED]
Aug 4, 2003 11:19:37 AM
com.opensymphony.webwork.lifecycle.ApplicationLifecycleListener
contextInitialized
INFO: container =
[EMAIL PROTECTED] 
de29
Aug 4, 2003 11:19:37 AM
com.opensymphony.webwork.lifecycle.ApplicationLifecycleListener
attributeAdded
INFO: event = DefaultComponentManager
Aug 4, 2003 11:19:37 AM
com.opensymphony.webwork.lifecycle.ApplicationLifecycleListener
attributeAdded
INFO: event = ComponentConfiguration
08/04 11:19:37 user JSPServlet: init
08/04 11:19:37 info Deploying enterprise application "Flash Remoting
EAR" from: file:/C:/JRun4/lib/flashgateway.ear
08/04 11:19:37 info Deploying web application "Flash Remoting" from:
file:/C:/JRun4/lib/flashgateway.ear
08/04 11:19:38 user JSPServlet: init
08/04 11:19:38 user FlashGatewayServlet: init
Server default ready (startup time: 34 seconds)
08/04 11:19:44 user FlashGatewayServlet: destroy
Aug 4, 2003 11:19:44 AM
com.opensymphony.webwork.lifecycle.ApplicationLifecycleListener
attributeRemoved
INFO: event = ComponentConfiguration
Aug 4, 2003 11:19:44 AM
com.opensymphony.webwork.lifecycle.ApplicationLifecycleListener
attributeRemoved
INFO: event = DefaultComponentManager
Aug 4, 2003 11:19:44 AM
com.opensymphony.webwork.lifecycle.ApplicationLifecycleListener
contextDestroyed
INFO: event =
javax.servlet.ServletContextEvent[source=jrun.servlet.JRunServletContext 
@52eef4]
Aug 4, 2003 11:19:44 AM
com.opensymphony.webwork.lifecycle.ApplicationLifecycleListener
contextDestroyed
INFO: application = [EMAIL PROTECTED]
Aug 4, 2003 11:19:44 AM
com.opensymphony.webwork.lifecycle.ApplicationLifecycleListener
contextDestroyed
INFO: container = null

08/04 11:19:44 error RuntimeException thrown in operation stop
[1]java.lang.NullPointerException
        at
com.opensymphony.webwork.lifecycle.ApplicationLifecycleListener.conte
xtDestroyed(ApplicationLifecycleListener.java:44)
        at
jrun.servlet.JRunServletContext.fireContextDestroyedEvent(JRunServlet
Context.java:365)
As you can probably tell, I added some additional logging in the  
contextInitialized/Destroyed message.

So, JRun removes things from application scope before calling the  
contextDestroyed method.  I'll patch this up by doing a comparison and  
cleanup in attributeRemoved and keep the class implementing  
ServletContextAttributeListener.

After I get this all working on my end, I'll submit a patch.

	Erik



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