Classloading issues with XFire and JCA
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Key: XFIRE-1082
URL: http://jira.codehaus.org/browse/XFIRE-1082
Project: XFire
Issue Type: Bug
Components: Aegis Module
Affects Versions: 1.2.6
Environment: Windows, Java 1.5, JBoss 4.2.0
Reporter: Peter Liljenberg
Assignee: Dan Diephouse
Priority: Critical
Java version: 1.5
JBoss version: JBoss 4.2.0GA
XFire version: 1.2.6
I'm having trouble with JBoss and classloading (isolation?).
I have an "architecture" like this:
XFire Servlets for Webservices (packaged as WAR files, containing all JARs
needed)
JCA for integration with other systems (packaged as RAR files, containing all
JARs needed)
The WARs and RARs are then packaged in an EAR file which is deployed in JBoss
(default).
The Webservices use the JCA ConnectionFactory/Connection interfaces to access
external systems.
Here I encountered the first problem. The Webservices throws ClassCastException
since the RAR file contains a JAR with the ConnectionFactory/Connection
interfaces and the Webservice WAR contains the same.
This seems to be a common problem with JCA(?) and the issue was resolved by
removing the JAR from the WAR files, allowing JBoss to load it from the RAR
file instead, which intuitively sounds like a bad design for Classloading?
So now we have access to the JCA from the WAR files and it's seems just fine.
Now we want integrate with an external system that is running Webservices, so
we use XFire as a Client in a JCA connector.
This results in a new ClassCastException when XFire tries to load its
dependencies.
XFire does Thread.currentThread().getContextClassLoader() to dynamically load
classes, this returns the Webservice (our WAR) classloader, which is probably
correct but all other classes in the context is loaded by the RAR classloader.
java.lang.ClassCastException: org.codehaus.xfire.aegis.type.java5.DurationType
at
org.codehaus.xfire.aegis.type.DefaultTypeMappingRegistry.registerIfAvailable(DefaultTypeMappingRegistry.java:434)
Is there a workaround for this?
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