Jörg Michelberger created DIRMINA-923:
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Summary: Many ClassNotFoundException in
AbstractIoBuffer.putObject()
Key: DIRMINA-923
URL: https://issues.apache.org/jira/browse/DIRMINA-923
Project: MINA
Issue Type: Bug
Components: Filter
Affects Versions: 2.0.7
Environment: Win 7, Java 7, MINA jars wrapped in NetBeans module.
Reporter: Jörg Michelberger
Using ObjectSerializationEncoder causes a lot of ClassNotFoundExceptions in
AbstractIoBuffer.putObject().
In putObject() is Class.forName(String className) used for supporting the
serialization process. This uses the Classloader of the calling thread. There
is no guarantee that the calling thread is able to load all classes that should
be serialized. Instead of using the caller thread Classloader the
Thread.currentThread().getContextClassLoader() shoud be used to do the job, or
the Classloade which should be used has to be passed in Constructor of
ObjectSerializationEncoder, same way the ObjectSerializationDecoder does.
When using MINA in a modular Container like NetBeans the
Thread.currentThread().getContextClassLoader() can be used inside without any
API change.
Please consider this change for 2.0.8.
See appended code of AbstractIoBuffer.putObject() which works in NetBeans
modular framework:
public IoBuffer putObject(Object o) {
int oldPos = position();
skip(4); // Make a room for the length field.
try {
ObjectOutputStream out = new ObjectOutputStream(asOutputStream()) {
@Override
protected void writeClassDescriptor(ObjectStreamClass desc)
throws IOException {
try {
if (!desc.forClass().isArray()) {
Class<?> clz =
Thread.currentThread().getContextClassLoader().loadClass(desc.getName());
if (!Serializable.class.isAssignableFrom(clz)) { //
NON-Serializable class
write(0);
super.writeClassDescriptor(desc);
} else { // Serializable class
write(1);
writeUTF(desc.getName());
}
} else {
write(0);
super.writeClassDescriptor(desc);
}
} catch (ClassNotFoundException ex) { // Primitive types
write(0);
super.writeClassDescriptor(desc);
}
}
};
out.writeObject(o);
out.flush();
} catch (IOException e) {
throw new BufferDataException(e);
}
// Fill the length field
int newPos = position();
position(oldPos);
putInt(newPos - oldPos - 4);
position(newPos);
return this;
}
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