Hi all,
I'm trying to use jBPM 3.1 in an EJB project. Don't care about Hibernate
functionality, just in-memory usage of jBPM from a session bean. I created an
action and ran into a class loading exception that from past messages in this
forum I can see isn't unusual. Alas, in my project using the UCL isn't an
option (even if it were, I'm not a fan of the UCL). I was looking in
ProcessClassLoader to see what I could do about the problem, code shown below:
| public Class findClass(String name) throws ClassNotFoundException {
| Class clazz = null;
| FileDefinition fileDefinition = processDefinition.getFileDefinition();
| if (fileDefinition!=null) {
| String fileName = "classes/" + name.replace( '.', '/' ) + ".class";
| byte[] classBytes = fileDefinition.getBytes(fileName);
| clazz = defineClass(name, classBytes, 0, classBytes.length);
| }
| if (clazz==null) {
| throw new ClassNotFoundException("class '"+name+"' could not be found
by the process classloader");
| }
| return clazz;
| }
|
Unless I'm missing something, jBPM is only capable of loading classes that
exist in a "classes" directory off the current classpath? Isn't that kinda
strange? Isn't a "classes" dir what should be ON the classpath, not a
subdirectory of something else on the classpath?
The above implementation seems like it would be easy to fix so that it would
work for components that have an appropriate classpath (e.g. because they have
a manifest-specified classpath). Allowing for prioritizing backward
compatibility with whatever motivated the original code, couldn't we just do:
| clazz = (clazz == null) ? super.findClass(name) : clazz;
| if (clazz==null) {
| throw new ClassNotFoundException("class '"+name+"' could not be found
by the process classloader");
| }
|
Am I missing something?
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http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3937539#3937539
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