ListenerStart Error

[Kai Karius]

Hi Guys,

ok, i wrote a listener, here it is:

package com.example;

import javax.servlet.*;

public class MyServletContextListener implements ServletContextListener {

	public void contextInitialized(ServletContextEvent event) {
	

		ServletContext sc = event.getServletContext();
	
		String dogBreed = sc.getInitParameter("breed");

		Dog d = new Dog(dogBreed);

		sc.setAttribute("dog",d);

	}

	
	public void contextDestroyed(ServletContextEvent event) {

	}

}    

Its from the HF Servlet and JSP as some of you will guess. Its deployed in [tomcat]/webapps/Listener/WEB-INF/com/example. The DD is such:

  <web-app xlmns="http://java.sun.com/xml/ns/j2ee"
xlmns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"
version="2.4">

<servlet>
<servlet-name>ListenerTester</servlet-name>
<servlet-class>com.example.ListenerTester</servlet-class>
</servlet>

<servlet-mapping>
<servlet-name>ListenerTester</servlet-name>
<url-pattern>/ListenTest.do</url-pattern>
</servlet-mapping>

<context-param>
<param-name>breed</param-name>
<param-value>Dackel</param-value>
</context-param>

<listener>
<listener-class>
com.example.MyServletContextListener
</listener-class>
</listener>

</web-app>  

Its deployed in tomcat]/webapps/Listener/WEB-INF

Now upon startup Tomcat 5 tells me very inconclusive stuff:

08.02.2009 17:52:48 org.apache.catalina.core.ApplicationContext log
INFO: SessionListener: contextDestroyed()
08.02.2009 17:52:48 org.apache.catalina.core.ApplicationContext log
INFO: ContextListener: contextDestroyed()
08.02.2009 17:52:49 org.apache.catalina.core.ApplicationContext log
INFO: SessionListener: contextDestroyed()
08.02.2009 17:52:49 org.apache.catalina.core.ApplicationContext log
INFO: ContextListener: contextDestroyed()
08.02.2009 17:52:50 org.apache.catalina.core.ApplicationContext log
INFO: SessionListener: contextDestroyed()
08.02.2009 17:52:50 org.apache.catalina.core.ApplicationContext log
INFO: ContextListener: contextDestroyed()
08.02.2009 17:53:37 org.apache.catalina.core.ApplicationContext log
INFO: org.apache.webapp.balancer.BalancerFilter: init(): ruleChain: [org.apache.webapp.balancer.RuleChain: [org.apache.webapp.balancer.rules.URLStringMatchRule: Target string: News / Redirect URL: http://www.cnn.com], [org.apache.webapp.balancer.rules.RequestParameterRule: Target param name: paramName / Target param value: paramValue / Redirect URL: http://www.yahoo.com], [org.apache.webapp.balancer.rules.AcceptEverythingRule: Redirect URL: http://jakarta.apache.org]]
08.02.2009 17:53:39 org.apache.catalina.core.ApplicationContext log
INFO: ContextListener: contextInitialized()
08.02.2009 17:53:39 org.apache.catalina.core.ApplicationContext log
INFO: SessionListener: contextInitialized()
08.02.2009 17:53:42 org.apache.catalina.core.ApplicationContext log
INFO: ContextListener: contextInitialized()
08.02.2009 17:53:42 org.apache.catalina.core.ApplicationContext log
INFO: SessionListener: contextInitialized()
08.02.2009 17:53:42 org.apache.catalina.core.StandardContext listenerStart
SCHWERWIEGEND: Error configuring application listener of class com.example.MyServletContextListener
java.lang.ClassNotFoundException: com.example.MyServletContextListener
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1387)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1233)
at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:3786)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:4342)
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:791)
at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:771)
at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:525)
at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:926)
at org.apache.catalina.startup.HostConfig.deployDirectories(HostConfig.java:889)
at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:492)
at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1149)
at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:311)
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:117)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1053)
at org.apache.catalina.core.StandardHost.start(StandardHost.java:719)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:443)
at org.apache.catalina.core.StandardService.start(StandardService.java:516)
at org.apache.catalina.core.StandardServer.start(StandardServer.java:710)
at org.apache.catalina.startup.Catalina.start(Catalina.java:578)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:288)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:413)
08.02.2009 17:53:42 org.apache.catalina.core.StandardContext listenerStart
SCHWERWIEGEND: Skipped installing application listeners due to previous error(s)
08.02.2009 17:53:44 org.apache.catalina.core.ApplicationContext log
INFO: ContextListener: contextInitialized()
08.02.2009 17:53:44 org.apache.catalina.core.ApplicationContext log
INFO: SessionListener: contextInitialized()

Where seems to be the error?

TWERP

[Bauke Scholtz]

Kai Karius wrote:
java.lang.ClassNotFoundException: com.example.MyServletContextListener

The mentioned class is missing in the classpath of the runtime environment. Add it to the classpath of the runtime environment.

[Kai Karius]

The mentioned class is missing in the classpath of the runtime environment. Add it to the classpath of the runtime environment.

True. But it IS there, i will give you an overview of my deployment structure:

[tomcat]/webapps/Listener/WEB-INF/web.xml
[tomcat]/webapps/Listener/WEB-INF/com/example/Dog.class
tomcat]/webapps/Listener/WEB-INF/com/example/MyServletContextListener.class
tomcat]/webapps/Listener/WEB-INF/com/example/ListenerTester.class

So, whats the matter?

[Bauke Scholtz]

Maybe a typo, or actually a wrong location, or server isn't restarted.

Point is: class cannot be found in the classpath. Triplecheck everything.

[Mike Kaufman]

Shouldn't the class files be in WEB-INF/classes, rather than directly in root of WEB-INF?

i.e. I think it should be [tomcat]/webapps/Listener/WEB-INF/classes/com/example/MyServletContextListener.class

[Bear Bibeault]

Mike Kaufman wrote:Shouldn't the class files be in WEB-INF/classes

Ding ding ding. The man gets a cigar.

If you don't put the class files in the right place, no worky!

[Kai Karius]

Sigh. Yes. That was it.

Thank you!