If you have a service interface Service:
@RemoteServiceRelativePath("service")
public interface Service extends RemoteService {
void send(Message m);
}
You can do the following
Message m = new Message();
// initialize message
SerializationStreamFactory sf = GWT.create(Service.class);
SerializationStreamWriter writer = sf.createStreamWriter();
writer.writeObject(m);
int size = writer.toString().length();
writer.toString() returns the actual serialized Message object.
AFAIK GWT serialization is asymetric so perhaps the size is a bit different
when the Message object is sent from the server to the client.
Hope this helps.
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