BUG: Business Components using Datasources on Websphere - statement closed

Hi,
This is an unusual combinatation, we are deploying business components projects on websphere with a SQL Server database. This was originally deployed all to Oracle. We have managed to convert the project sucessfully (JDeveloper 10.1.3) and on Websphere, however when we moved our application module configurations (bc4j.xcfg) to use JNDI data sources which works in Jdeveloper, we are encountering problems using websphere with business components and datasources.
The statement closed error occurs when trying to calling executequery() method on the view object, not the first time the JSP page is accessed, but the second time. Refresh page all is good. Access page again error occurs. Very consistent.
Our code will often do applicationmodule.findViewObject("name"), if not found then create it, otherwise use the vo and kapow bombs out on the executequery method if reusing the view object.
ERROR
DSRA9110E: Statement is closed.oracle.jbo.SQLStmtException: JBO-27122: SQL error during statement preparation.
Statement: SELECT Groups.GROU_ID FROM GROUPS Groups WHERE (GROU_ID=1)
at oracle.jbo.server.QueryCollection.buildResultSet(QueryCollection.java(Compiled Code))
at oracle.jbo.server.QueryCollection.executeQuery(QueryCollection.java(Compiled Code))
at oracle.jbo.server.ViewObjectImpl.executeQueryForCollection(ViewObjectImpl.java(Compiled Code))
at oracle.jbo.server.ViewRowSetImpl.execute(ViewRowSetImpl.java(Compiled Code))
at oracle.jbo.server.ViewRowSetImpl.executeQueryForMasters(ViewRowSetImpl.java(Inlined Compiled Code))
at oracle.jbo.server.ViewRowSetImpl.executeQuery(ViewRowSetImpl.java(Inlined Compiled Code))
at oracle.jbo.server.ViewObjectImpl.executeQuery(ViewObjectImpl.java(Compiled Code))The datasource uses the connection pooling driver class com.microsoft.sqlserver.jdbc.SQLServerConnectionPoolDataSource.
Ampooling is on. It appears the jdbc prepared statement is being closed but bc4j is expecting to still be open?
Any ideas on diagnosing the issue or app module config changes greatly appreciated.
Mark

Hi Steve,
This is not a composition association. Actually, this is an association from a table to an intersection (many-to-many) table. The code in my service is based on the SRDemo, see SRServiceImpl#updateSkillsForCurrentStaff(List) and is called on a save button from a shuttle page.
The current master is the master I want it to belong to. The link to the master gets correctly saved in the database (just as in the SRDemo). We can also navigate from the master view row to the find the detail view row using the generated RowIterator. However, this does not work from the master entity row to the detail entity row. The problem is really at the entity level.
Thanx
Olivier

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I'm using JDev 11g TP2
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Thanks

No worries Ric. Unfortunately I don't have access to your latest builds but I'll still raise the issues in case they are relevant.
Regards,
CM.

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**************************************************************

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Thanks for following this up.
Cheers,
CM.

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Hi Steve
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The Standard Entity Beans are a component (JavaBean) that can be a small piece of the ultimate application needs.
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null

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The Standard Entity Beans are a component (JavaBean) that can be a small piece of the ultimate application needs.
Oracle Business Component for Java is a complete framework that has numerous features that make developing COMPLETE applications easy.
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null

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The tutorial is for ADF BC used with JavaServer Faces.
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It's more of what you don't need to do :-)
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http://radio.weblogs.com/0118231/stories/2006/01/26/theAdfBusinessComponentsActiveDataModel.html
I know that when dropping a view object you get this functionality. Also was wondering if we were to pass an object of thios type back to the model it might not give us the rich functionality like input forms, like what Oracle provides if we were to drop a enitity view object.
Just use the active data model and everything becomes totally easy, with no changes required to switch between local or three-tier deployment configurations.
Trying to do everything with hand-coded DTO beans is really going the hard way.
Could you help us regarding this?

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Hi,
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Following a hands-on exercise in the Oracle JDeveloper 10g Handbook (pages 343 - 345):
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-- See error message below.
Johnny Lee
Message
BME-99003: An error occurred, so processing could not continue.
Cause
The application has tried to de-reference an invalid pointer. This exception should have been dealt with programmatically. The current activity may fail and the system may have been left in an unstable state. The following is a stack trace.
java.lang.NullPointerException
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Action
If further errors occur, you should restart the application.
Also, report the problem on the JDeveloper forum on otn.oracle.com, or contact Oracle support, giving the information from this message.
________________________________________________________________________________

We have not been able to reproduce the exact same error, there would be a problem if we were trying to write to the library file, as those objects are read only, of course. Can you tell me, the entity object that you are referencing, has it ever appeared on a diagram? An easy way to tell, if you don't know is by looking at its XML file and see if it has an ID=some long string entry.

The major difference between Oracle BC4J with WebSphere Business Components

Hi BC4J/ADF experties:
who could help to explian the difference betweenn IBM WebSphere Business Components(San Francisco) with Oracle BC4J(ADF) ? , the both product to emphasize Component-based developemnt but WebSphere Business Components have been define some enterprise base component that can provide extend and customize. how do you look up on this product strategy for developer ?

I guess one difference is who can use it, for IBM components:
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IBM's solution seems to lock you into using Webssphere, with BC4J you can use whichever application server you want.
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This is not what BC4J is about.
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To understand what BC4J give you read:
http://otn.oracle.com/products/jdev/collateral/tutorials/903/j2ee_bc4j/prnt/j2ee_bc4j.html

BUG: Business Components using Datasources on Websphere - statement closed

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