Does User implement Serializable or IsSerializable? You have to use
at least one to tell GWT that you want to send it over the wire.
I'm having a little trouble understanding your situation, please post
you file structure, and if possible, User.java or your .gwt.xml
modules...
/foo/bar/Common.gwt.xml
/foo/bar/client/User.java
/foo/bar/client/Save.java
/foo/bar/client/SaveAsync.java
/foor/bar/server/SaveImpl.java
...And so forth...
Also, if you can, avoid Long. It's faster in Java, but MUCH slower in
GWT... Because javascript has only one number type, and it's double.
Long requires emulation and you {your users} pay for it every time you
read a long value. If your datastore or whatever needs Long, just use
a double and do the casting on your server... Clients are more
important!
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