Marcus Linke [
http://community.jboss.org/people/marcuslinke] replied to the discussion
"JBoss 4.2.1 RemoteEJB Lookup ClassCastException"
To view the discussion, visit:
http://community.jboss.org/message/549052#549052
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I've read this and found a simpler solution / workaround for this problem (without the
need of patching). It's simple to integrate the appropriate code taken from
EJBTHREE-1889 into the own JNDI lookup. Because of performance reasons this hack of course
should be used only for JVM internal remote lookups (which is the case with isolated
EAR's). This may be realized by using different JNDI lookup wrapper classes...
public class JBossRemoteJndiLookup<T> {
public T lookup(String resourceName) {
Object o = new InitialContext().lookup(resourceName);
o = refineObjectInContextClassLoader(o);
return (T) o;
}
/**
* This is a workaround for
http://community.jboss.org/thread/111016
http://community.jboss.org/thread/111016. It is taken from
*
https://jira.jboss.org/browse/EJBTHREE-1889
https://jira.jboss.org/browse/EJBTHREE-1889. See modifications of ProxyObjectFactory.java
*/
private Object refineObjectInContextClassLoader(Object o) {
// EJBTHREE-1889: if the lookup has been performed locally on a remote (business)
// interface that's defined in the current TCL, then the proxy must implement
// that TCL defined interface.
// redefine in TCL
ClassLoader tcl = Thread.currentThread().getContextClassLoader();
try {
o = redefineObjectInClassLoader(o, tcl);
} catch (Exception e) {
throw new RuntimeException(e);
}
return o;
}
private Object redefineObjectInClassLoader(Object obj, ClassLoader target) throws
ClassNotFoundException,
IOException {
ByteArrayOutputStream bout = new ByteArrayOutputStream();
ObjectOutputStream out = new ObjectOutputStream(bout);
out.writeObject(obj);
out.flush();
ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
ObjectInputStream in = new ObjectInputStreamWithClassLoader(bin, target);
Object result = in.readObject();
in.close();
return result;
}
}
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