tomcat-users mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Tim Funk <funk...@joedog.org>
Subject Re: Load class from different web app
Date Fri, 04 Nov 2005 12:40:13 GMT
Placing classes jdk/jre/lib/ext puts them into the system classloader. This 
opens a whole class of class not found errors and errors related to tomcat 
not reloading classes. (As well as memory leaks due to Classloaders not being 
freed)

-Tim

Michael Forster wrote:

> That is not strictly true, We had an application at work that used JNI and
> was part of a Database access library as well as accessing things like the
> Machines Hostmac address.
> 
> We could not run it from the Tomcat area and had to put it into a jar file
> and put the jar file into the JVM jdk/jre/lib/ext dir and then it worked
> fine as any classes / libraries in that dir are loaded by the JVM meaning
> they are always available - This is also where we put the JDBC driver jar.
> 
> Mike.
> 
> -----Original Message-----
> From: Tim Funk [mailto:funkman@joedog.org]
> Sent: 04 November 2005 11:32
> To: Tomcat Users List
> Subject: Re: Load class from different web app
> 
> 
> You are violating the servlet spec. Do not pass go, do not collect $200.
> 
> Classes for a webapp need to be in WEB-INF/classes and WEB-INF/lib. Tomcat
> does allow for webapps to share classes via the $CATALINA_HOME/shared and
> $CATALINA_HOME/common directories but you'll need to see the classloader
> docs
> on any restrictions.
> 
> -Tim
> 
> Steven Nakhla wrote:
> 
> 
>>I'm writing a web application (a portal app, to be specific) that needs to
>>be able to load a class (using Class.forName(...)) that was deployed in a
>>different web application from the one I am developing. I've deployed the
>>target web app containing the class I want to load, but whenever I call
>>Class.forName(), I get a "java.lang.ClassNotFoundException". Is there
>>anything special I need to do if I want to load this class? It appears it
> 
> is
> 
>>a classloader issue, but I don't know enough to determine what the problem
>>is. Any help is greatly appreciated!
>>
>>Steve Nakhla
>>
> 
> 
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
> For additional commands, e-mail: users-help@tomcat.apache.org
> 
> 
> 
> --
> No virus found in this incoming message.
> Checked by AVG Free Edition.
> Version: 7.1.362 / Virus Database: 267.12.8/161 - Release Date: 03/11/2005
> 
> 
> 
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
> For additional commands, e-mail: users-help@tomcat.apache.org
> 
> 

---------------------------------------------------------------------
To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
For additional commands, e-mail: users-help@tomcat.apache.org


Mime
View raw message