Hi,
One issue that we ran into was that we were using an EClass
with EOperations to define the interface that we publish as an
OSGi service. Using the default parameters in the genmodel
gave us methods that return an EList<EClass> instead of
a normal List<Class>. The EList caused problems during
serialization, so we wound up regenerating the interface class
using the "suppress EMF types" option set to true. We only
needed to use this option for the interface classes, not the
data types being passed.
Much of our data types were serializable without any needed
updates. The problem popped up when we had use the EDataType
to bring in other Java types that are not seriailizable. We
wound up writing a single serialization helper class that
packs an EObject into a resource and then serialized the
resource. The opposite happens on the receive side. It was a
lot of work to capture all of the referenced objects as well,
since they have to be packed into the resource as well (in
reverse order). This was the bane of my existence for a few
weeks. We updated the Class.javajet template to have each
class implement serializable and added the writeObject and
readObject to turn around and call our Serialization helper.
Much of the debugging included writing the serialization
resource to a temp file on writeObject and readObject so we
could get an idea of what data was being included. Also -
don't forget to find the properties that govern the timeout
values and update them to give you enough time to step through
code if needed.
Another note that I still do not understand - there were
unit tests that ran successfully in a single process (writing
to a byte stream and reading an object back from the byte
stream) that failed when run cross process through a socket.
There may be some static registration of objects happening in
the Resource class that allowed things to pass. I did not
have enough time to fully investigate.
I'll update this thread as I remember more issues.
Feel free to drop in more questions as well. I plan on
creating a type of "Lessons Learned" presentation on this.
