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Posted to users@tomcat.apache.org by Sebastian Biedermann <bi...@seceng.informatik.tu-darmstadt.de> on 2011/04/07 14:48:21 UTC

Tomcat LifecycleListener

Dear List,

I want to programm an Eventlistener for the tomcat6 Server that gives
me an event when a war-file ist started.

So I added a line to the server.xml:

<Server>
[...]
   <ListenerclassName="TomcatListener"/>
[...]
</Server>


And I have this little Java example code here which I put in
/usr/share/tomcat6/lib/TomcatListener.java :

import org.apache.catalina.Lifecycle;
import org.apache.catalina.LifecycleEvent;
import org.apache.catalina.LifecycleListener;

public class TomcatListener implements LifecycleListener {
   public void lifecycleEvent(LifecycleEvent event) {
     if(event.getType().equals(Lifecycle.BEFORE_START_EVENT)) {
       // do something before Tomcat starts
     }
     else if (event.getType().equals(Lifecycle.AFTER_STOP_EVENT)) {
       // so something after Tomcat shut down
     }
   }
}


But unfortunately the tomcat server is not starting anymore, the logfile says:

Caused by: java.lang.ClassNotFoundException: TomcatListener
	at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:248)
	at org.apache.tomcat.util.digester.ObjectCreateRule.begin(ObjectCreateRule.java:205)
	at org.apache.tomcat.util.digester.Rule.begin(Rule.java:153)
	at org.apache.tomcat.util.digester.Digester.startElement(Digester.java:1356)
	... 20 more
07.04.2011 14:12:09 org.apache.catalina.startup.Catalina start
FATAL: Cannot start server. Server instance is not configured.


Maybe that´s stupid from my side, but I dont know where to put the java or
what´s going wrong there. Do I have to create a .jar?

How can i get this to work?


Thanks for help
Sebastian



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RE: Tomcat LifecycleListener

Posted by "Caldarale, Charles R" <Ch...@unisys.com>.
> From: Sebastian Biedermann [mailto:biedermann@seceng.informatik.tu-darmstadt.de] 
> Subject: Tomcat LifecycleListener

> I want to programm an Eventlistener for the tomcat6 Server 
> that gives me an event when a war-file ist started.

Be precise: tell us the *exact* Tomcat version (there are ~25 releases of Tomcat 6), along with the JDK/JRE you're using, and the platform you're running on.

> So I added a line to the server.xml:
> <Server>
> [...]
>    <ListenerclassName="TomcatListener"/>
> [...]
> </Server>

You're missing a space between Listener and className.

> And I have this little Java example code here which I put in
> /usr/share/tomcat6/lib/TomcatListener.java :

.java != .class

What do you expect Tomcat to do with source code?  You need to compile your .java code into a class file.

 - Chuck


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Re: Tomcat LifecycleListener

Posted by André Warnier <aw...@ice-sa.com>.
Sebastian Biedermann wrote:
> Dear List,
> 
> I want to programm an Eventlistener for the tomcat6 Server that gives
> me an event when a war-file ist started.
> 
> So I added a line to the server.xml:
> 
> <Server>
> [...]
>   <ListenerclassName="TomcatListener"/>
> [...]
> </Server>
> 
> 
> And I have this little Java example code here which I put in
> /usr/share/tomcat6/lib/TomcatListener.java :
> 
> import org.apache.catalina.Lifecycle;
> import org.apache.catalina.LifecycleEvent;
> import org.apache.catalina.LifecycleListener;
> 
> public class TomcatListener implements LifecycleListener {
>   public void lifecycleEvent(LifecycleEvent event) {
>     if(event.getType().equals(Lifecycle.BEFORE_START_EVENT)) {
>       // do something before Tomcat starts
>     }
>     else if (event.getType().equals(Lifecycle.AFTER_STOP_EVENT)) {
>       // so something after Tomcat shut down
>     }
>   }
> }
> 
> 
> But unfortunately the tomcat server is not starting anymore, the logfile 
> says:
> 
> Caused by: java.lang.ClassNotFoundException: TomcatListener
>     at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
>     at java.security.AccessController.doPrivileged(Native Method)
>     at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
>     at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
>     at java.lang.ClassLoader.loadClass(ClassLoader.java:248)
>     at 
> org.apache.tomcat.util.digester.ObjectCreateRule.begin(ObjectCreateRule.java:205) 
> 
>     at org.apache.tomcat.util.digester.Rule.begin(Rule.java:153)
>     at 
> org.apache.tomcat.util.digester.Digester.startElement(Digester.java:1356)
>     ... 20 more
> 07.04.2011 14:12:09 org.apache.catalina.startup.Catalina start
> FATAL: Cannot start server. Server instance is not configured.
> 
> 
> Maybe that´s stupid from my side, but I dont know where to put the java or
> what´s going wrong there. Do I have to create a .jar?
> 
> How can i get this to work?
> 

You may need to compile that and make it a .class, no ?

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