----- Original Message -----
From: "David Ward" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Cc: "JBoss Dev" <[EMAIL PROTECTED]>
Sent: Tuesday, May 21, 2002 6:33 AM
Subject: [JBoss-dev] Re: [JBoss-user] JBoss 3.0 ClassLoader Architecture
> 1) In your document, you state (concerning the WAR Loader):
> "The WAR Loader is a servlet container specific ClassLoader that
> delegates to the Web ENCLoader as its parent class loader. The default
> behavior is to load from its parent class loader and then the war
> WEB-INF/{classes,lib} directories. If the servlet 2.3 class loading
> model is enabled it will first load from the war WEB-INF/{classes,lib}
> and then the parent class loader."
> Is the servlet 2.3 class loading model enabled or not by default in
> jboss3rc3-tomcat4? What about with Jetty 4? Where is this configured?
>
Not enabled by default in either Jetty or Tomcat. See the
Java2ClassLoadingCompliance
attribute:
<!-- If true, Jetty first delegates loading a class to the
pp's -->
<!-- parent class loader (a la Java 2). If false, Jetty follows
-->
<!-- Servlet 2.3 specification, and tries the webapp's own
r -->
<!-- first (for "non-system"
-->
<attribute name="Java2ClassLoadingCompliance">true</attribute>
> 2) Under "Disadvantages," you state:
> "Deployments that depend on different versions of the a given class need
> to be isolated in seperate JBoss servers. This will be addressed in the
> RC3 release with an ability to isolate classes using ears."
> Since rc3 is out, does the ear isolation method work?
>
See the RC3 change notes.
> 3) Is there any way you can share a bit of info on how jboss 2.4.3+
> classloading works? Maybe not to the detail you did for 3.0, but for
> those of us stuck with 2.4 at work until 3.0 goes final, it would be
> nice to know.
>
Basic Java2 parent delegation model similar to weblogic. Both web
containers support Java2ClassLoadingCompliance in 2.4.6
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