Problem locating view

Question

Maybe I'm still doing this wrong...
My new Application module can't find its views:
<AppModule
Name="ModuleMaintenance"
TimeStamp="1028542505735"
ComponentClass="com.lynx.c2.bc.ModuleMaintenanceImpl" >
<DesignTime>
<Attr Name="_isCodegen" Value="true" />
<Attr Name="_version" Value="9.0.2.7.99" />
<Attr Name="_deployType" Value="0" />
<Attr Name="_exportName" Value="ModuleMaintenance" />
</DesignTime>
<ViewUsage
Name="MaintenanceSender"
ViewObjectName="com.lynx.c2.bc.MaintenanceSender" >
</ViewUsage>
</AppModule>
However, the following code fails when binding it's first field (PanelMaintenanceSender.java is as created by the wizard):
setJUApplication(JUMetaObjectManager.createApplicationObject("C2.ModuleMaintenance", null, infoProvider));
new PanelMaintenanceSender(getJUApplication());
A few lines from PanelMaintenanceSender.java:
public class PanelMaintenanceSender extends JPanel implements JUPanel
// Panel binding definition
private JUPanelBinding panelBinding = new JUPanelBinding("C2.ModuleMaintenance", this);
public void jbInit() throws Exception
// Layout definition for this panel
dataPanel.setLayout(panelLayout);
dataPanel.setMinimumSize(new Dimension(100, 100));
this.setLayout(borderLayout);
// Code support form attribute: SenderId
mSenderId.setDocument(JUTextFieldBinding.createAttributeBinding(panelBinding, mSenderId, "MaintenanceSender", null, "MaintenanceSenderIter", "SenderId"));
oracle.jbo.NoObjException: JBO-25003: Object MaintenanceSender of type View Object not found
     oracle.jbo.ViewObject oracle.jbo.uicli.binding.JUIteratorBinding.getViewObject()
          JUIteratorBinding.java:601
     oracle.jbo.RowSetIterator oracle.jbo.uicli.binding.JUIteratorBinding.getRowSetIterator()
          JUIteratorBinding.java:666
     oracle.jbo.NavigatableRowIterator oracle.jbo.uicli.binding.JUIteratorBinding.getNavigatableRowIterator)
          JUIteratorBinding.java:728
     oracle.jbo.RowIterator oracle.jbo.uicli.binding.JUControlBinding.getRowIterator()
          JUControlBinding.java:219
     void oracle.jbo.uicli.binding.JUCtrlAttrsBinding.refreshControl()
          JUCtrlAttrsBinding.java:154
     javax.swing.text.Document oracle.jbo.uicli.jui.JUTextFieldBinding.createAttributeBinding(oracle.jbo.uicli.binding.JUFormBinding, javax.swing.text.JTextComponent, java.lang.String, java.lang.String, java.lang.String, java.lang.String)
          JUTextFieldBinding.java:626
     void com.lynx.c2.app.PanelMaintenanceSender.jbInit()
          PanelMaintenanceSender.java:197
My Application module and Application model have the same name. Is this permitted?
Here's C2.cpx (I had to open this in Windows Explorer to discover its contents).
<JboProject
Name="C2"
Package="" >
<Session
Name="DataModel"
Package="com.lynx.c2.bc"
Configuration="BcModuleLocal" >
</Session>
<Session
Name="ModuleMaintenance"
Package="com.lynx.c2.bc"
Configuration="ModuleMaintenanceLocal" >
</Session>
</JboProject>
Tony.

Answer 1

I've tried to re-create this (I'd switched back to a single Application module) and can't. I may have missed one of the steps last time but now the Panel starts fine and the ViewObject is not null:
com.lynx.c2.bc.MaintenanceSenderImpl@1b7
I cannot see any typos in the listings I posted.
In attempting to reproduce the problem, I do have a couple of new points:
First, I re-created Application module "ModuleMaintenance", but forgot to add it to the C2.cpx file.
In this scenario, I get a NPE in JUMetaObjectManager.createPool() line 400:
java.lang.NullPointerException
     oracle.jbo.common.ampool.ApplicationPool oracle.jbo.uicli.mom.JUMetaObjectManager.createPool(java.lang.String, java.util.Properties)
          JUMetaObjectManager.java:400
The line is:
return oracle.jbo.common.ampool.PoolMgr.getInstance().findPool(qualifiedAMName, sessDef.getPackageName(), sessDef.getConfiguration(), env);
I think sessDef is null. The debugger won't report it's valueThis bug was reported for JDev 903 and has been since fixed in JDev 903.
Next I created a Data model (in C2.cpx) with the same name as my Application module.
I'm not clear on the difference between an Application Module and a Data Model. Is there some documentation describing what the two are for? It seems the Data model is just a reference to an application module without any attributes of it's own. Any attempt to edit the data model just starts the "create new model" wizard.
All the tutorials I've been through seem to use the same name for both the module and the model, and the Wizard defaults to this.
I can see a need for multiple Application Modules to modularize my application set. Each Module is designed for a small number of functions against a set of (related) entity/view objects, associations etc.
Is there a case for there being other than one (and only one) data model per application module?DataModel can have a different name than the AM. DataModel defines which Configuration to use to connect to an AM of choice, so it actually identifies the "configuration" for an AM and can have different names than the AM.
You can have multiple Configurations for an AM and can create DataModel entries for each in your Client side project and then test with each configuration by "changing" the DataModel name in the Frame's createApplication call.
Tony.