GWT no-dto

[François WAUQUIER]

Hi

I made a presentation at Paris Java User Group about using the same java object on the client and the server.

I talk about objectify and other frameworks.

http://wokier.blogspot.fr/2013/04/paris-jug-gwt-no-dto.html

http://gwt-nodto-quickie.appspot.com/

https://github.com/wokier/GwtNoDtoQuickie

I present it as a code example for the no-dto way and would be pleased to have feedback on it.

I have used objectify 2.2.3 for that.

It also work with 3.1

But I did not success to do the same thing with version 4.0b2

I am facing this error :

GRAVE: javax.servlet.ServletContext log: Exception while dispatching incoming RPC call

com.google.gwt.user.client.rpc.SerializationException: Type '$Proxy65' was not included in the set of types which can be serialized by this SerializationPolicy or its Class object could not be loaded. For security purposes, this type will not be serialized.: instance = [my.package.MyClass@989684559{id=1, name=Francois}

Any idea about that ?

Regards

[Jeff Schnitzer]

It's almost certainly the list() method. Querying for a list() now returns an asynchronous proxy. Java serialization has a writeReplace() method that should materialize it on the fly for you, but GWT-RPC is not as smart.

For GWT, you'll have to create a new array list in your rpc method:

 public java.util.List<Jugger> list() {
	return new ArrayList<Jugger>(juggerDao.list());
    }

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[François WAUQUIER]

Great news.
I'll try that.
Thanks