In pre JSF 2.0 you were forced to use the WEB-INF/web.xml file to register your ServletContextListener
<web-app version="3.0" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd">
<context-param>
<param-name>javax.faces.PROJECT_STAGE</param-name>
<param-value>Development</param-value>
</context-param>
<listener>
<listener-class>com.mycompany.myproject.MyServletContextListener</listener-class>
</listener>
...
</web-app>
While you can still do this, in JSF 2.0 it is now possible to register your ServletContextListener or rather any of the following Listeners:
ServletContextListener, ServletContextAttributeListener, ServletRequestListener, ServletRequestAttributeListener, HttpSessionListener, HttpSessionAttributeListener
by using the @WebListener annotation.
So your listener implementation would look like the following:
@WebListener
public class MyServletContextListener implements ServletContextListener {
...
}
When registering my ServletContextListener I ran into the following error messages:
SCHWERWIEGEND: PWC1306: Startup of context /MyApp failed due to previous errors
SCHWERWIEGEND: PWC1305: Exception during cleanup after start failed
org.apache.catalina.LifecycleException: PWC2769: Manager has not yet been started
at org.apache.catalina.session.StandardManager.stop(StandardManager.java:892)
at org.apache.catalina.core.StandardContext.stop(StandardContext.java:5383)
...
SCHWERWIEGEND: ContainerBase.addChild: start:
org.apache.catalina.LifecycleException: java.lang.NullPointerException
at org.apache.catalina.core.StandardContext.start(StandardContext.java:5216)
at com.sun.enterprise.web.WebModule.start(WebModule.java:499)
...
WARNUNG: java.lang.IllegalStateException: ContainerBase.addChild: start: org.apache.catalina.LifecycleException: java.lang.NullPointerException
java.lang.IllegalStateException: ContainerBase.addChild: start: org.apache.catalina.LifecycleException: java.lang.NullPointerException
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:932)
at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:912)
at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:694)
...
SCHWERWIEGEND: Exception while invoking class com.sun.enterprise.web.WebApplication start method
java.lang.Exception: java.lang.IllegalStateException: ContainerBase.addChild: start: org.apache.catalina.LifecycleException: java.lang.NullPointerException
at com.sun.enterprise.web.WebApplication.start(WebApplication.java:117)
at org.glassfish.internal.data.EngineRef.start(EngineRef.java:126)
at org.glassfish.internal.data.ModuleInfo.start(ModuleInfo.java:241)
at org.glassfish.internal.data.ApplicationInfo.start(ApplicationInfo.java:236)
SCHWERWIEGEND: Exception while loading the app
java.lang.Exception: java.lang.IllegalStateException: ContainerBase.addChild: start: org.apache.catalina.LifecycleException: java.lang.NullPointerException
at com.sun.enterprise.web.WebApplication.start(WebApplication.java:117)
at org.glassfish.internal.data.EngineRef.start(EngineRef.java:126)
at org.glassfish.internal.data.ModuleInfo.start(ModuleInfo.java:241)
This was a simple oversight on my part. In my Listener I wanted to use an EJB to add some data to the database using JPA. I forgot to use the @EJB annotation when defining the EJB attribute:
@EJB
private MyFacade myfacade;