Axis2 deployment cannot support isolated classloading of the axis2 runtime
against application code
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Key: AXIS2-1047
URL: http://issues.apache.org/jira/browse/AXIS2-1047
Project: Apache Axis 2.0 (Axis2)
Issue Type: Bug
Components: deployment
Affects Versions: 1.0
Reporter: Raymond Feng
In most of the Axis2 code, thread context classloader (TCCL) is used to resolve
class by name as follows.
Class.forName(clasName, true,
Thread.currentThread().getContextClassLoader());
For example, AxisConfigBuilder uses it to resolve TransportReceiver and
TransportSender. Please note the class can be suppiled by the application or by
Axis2 (default).
This approach works well in the following two cases:
1) The class is provided by the application and it's visible to the TCCL.
2) The class is provided by Axis2 and the axis2 is loaded by either the
application classloader or any ancestor of the application classloader.
We have a different use case. (similar as tomcat)
1) We load axis2 together with our library from an isolated classloader (CL1)
2) The application is running with its own classloader (TCCL=CL2)
3) CL2 cannot see classes in CL1
As a result, we got a ClassCastException for the Transport receiver and sender
even they are from the Axis2. Would it make sense to support this case using
the following:
Class cls = null;
try{
cls = Class.forName(clasName, true,
Thread.currentThread().getContextClassLoader()); // Try the application class
loader
} catch (ClassNotFoundException e) {
cls = Class.forName(className); // Try the axis2 classloader
}
Thanks,
Raymond
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