Juan, I thought you may have found the problem. There was a static
variable, the old:
static final long serialVersionUID = -1L;
I removed it, but that didn't make a difference.
Could it be that the data classes from the OldProject are really not
being picked up in NewUiProject? I tried doing a GWTCompile and
looking at the output. I don't see classes from OldProject in the WAR
for NewUiProject...even when I include the OldProject.jar! But, maybe
I don't understand enough about how GWT works?
Mike
On Aug 3, 11:49 am, Juan Pablo Gardella <gardellajuanpa...@gmail.com>
wrote:
> java.lang.NoClassDefFoundError: [Lcom/mycompany/myproject/data/FooDataClass;
> is not the same
> ClassNotFoundException<http://stackoverflow.com/questions/1457863/what-is-the-difference-bet...>,
> so perhaps you have a dependency or is not serializable or instanciable in
> runtime.
>
> Is serializable? have final fields? have a default constructor?
>
> 2011/8/3 Mike Dee <mdichiapp...@gmail.com>
>
>
>
>
>
>
>
> > I added a .gwt.xml file to the OldProject and inherited it from
> > NewUiProject. Only the data objects (pojos) from the OldProject are
> > listed in the source path of the .gwt.xml.
>
> > On Aug 3, 11:29 am, Juan Pablo Gardella <gardellajuanpa...@gmail.com>
> > wrote:
> > > RPC only work as transport layer between client and server side, so you
> > must
> > > put old project as a jar and define *.gwt.xml inside and define the
> > module.
> > > In NewUiProject inherit it. You can't said that the POJO is only in
> > server
> > > side if RPC layer try serialize/deseralize
>
> > > Juan
>
> > > 2011/8/3 Mike Dee <mdichiapp...@gmail.com>
>
> > > > I'm updating an existing web app to use GWT and encountering a problem
> > > > on server side. A goal is to reuse the server side data classes,
> > > > which are stored in a separate Eclipse project.
>
> > > > I have two projects: OldProject, which has old data classes (as POJOs)
> > > > and NewUiProject, which is GWT.
>
> > > > If I put the OldProject POJOs in the NewUiProject, all is fine. Of
> > > > course the POJOs don't fall under the "shared" directory, so I created
> > > > a .gwt.xml file and inherited that into the NewUiProject .gwt.xml.
>
> > > > If the OldProject POJOs are left in their project and NewUiProject
> > > > inherits the .gwt.xml from OldProject a runtime error occurs.
>
> > > > [ERROR] javax.servlet.ServletContext log: Exception while dispatching
> > > > incoming RPC call
> > > > java.lang.NoClassDefFoundError: [Lcom/mycompany/myproject/data/
> > > > FooDataClass;
> > > > at java.lang.Class.getDeclaredMethods0(Native Method)
> > > > at java.lang.Class.privateGetDeclaredMethods(Unknown Source)
> > > > at java.lang.Class.getMethod0(Unknown Source)
> > > > at java.lang.Class.getMethod(Unknown Source)
> > > > at
> > com.google.gwt.user.server.rpc.RPC.decodeRequest(RPC.java:299)
> > > > at
>
> > com.google.gwt.user.server.rpc.RemoteServiceServlet.processCall(RemoteServiceServlet.java:
> > > > 206)
> > > > at
>
> > com.google.gwt.user.server.rpc.RemoteServiceServlet.processPost(RemoteServiceServlet.java:
> > > > 248)
> > > > at
>
> > com.google.gwt.user.server.rpc.AbstractRemoteServiceServlet.doPost(AbstractRemoteServiceServlet.java:
> > > > 62)
> > > > at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
> > > > at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
>
> > > > It looks like FooDataClass is simply not found on the server side and
> > > > I can't figure out why. I am using Eclipse and NewUiProject has a
> > > > project reference to OldProject and also includes OldProject in the
> > > > Java Build Path Projects. If there were a project with references
> > > > across projects I don't think the project would compile. I also tried
> > > > packaging a JAR from OldProject and including it in NewUiProject, but
> > > > that makes no difference.
>
> > > > I don't think this is a case of not inheriting classes so that GWT
> > > > knows to compile them in the client side. That would produce an error
> > > > when starting up the client and an error message about not being able
> > > > to find the source code for the data classes. I'm mot seeing that
> > > > error. The UI comes up and the error is thrown when interacting with
> > > > the UI in such a way as to cause an RPC.
>
> > > > Any ideas?
>
> > > > Thanks,
> > > > Mike
>
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