[castor-dev] Key Generator Failure

Ayush Gupta Mon, 25 Mar 2002 11:14:54 -0800

Hello!

In all probability I might be doing something wrong, but could somebody please point out to me where and what I'm doing wrong?

I have four entities: Product, Attribute, Store and Category.

A Product has many Attributes. A Store has one Product. A Product belongs to many Categories. A Category belongs to many Products.

I get a LockNotGrantedException when I store a Product graph. When I store a Product I'm storing all "Related Objects" explicitly. Only Attribute is a "Dependent Object" on Product which I'm not storing explicitly. This exception occurs AFTER the first Category is created inside the for loop which creates all Categories for the new Product.

Thanks for any/all help.

Ayush

I get the following exception:

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

Exception I'm getting:

[ERROR,Default] org.exolab.castor.jdo.LockNotGrantedException: Lock is already existed for the new oid.

----

[INFO,Default] Nested error: Key Generator Failure. Duplicated Identity is generated!
[ERROR,Default] org.exolab.castor.jdo.PersistenceException: Nested error: Key Generator Failure. Duplicated Identity is generated!

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

Environment

Stateless Session Beans in Jboss 2.4.4

MS Sql Server 7

Using Identity Keygenerator for all tables

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

Client Code:

   Product p = new Product();
   p.productName = "Crank Shaft";
   p.descr = "Cranking the shaft in the 6 gauge engine";

   Category c1 = new Category();
   c1.categoryName = "Engine Parts";
   p.categories.add(c1);
   c1.products.add(p);
   Category c2 = new Category();
   c2.categoryName = "Crank Internals";
   p.categories.add(c2);
   c2.products.add(p);

   Attribute a1 = new Attribute();
   a1.attributeName = "cylinders";
   a1.attributeValue = "6";
   p.attributes.add(a1);
   a1.product = p;
   Attribute a2 = new Attribute();
   a2.attributeName = "manufacturer";
   a2.attributeValue = "Audi";
   p.attributes.add(a2);
   a2.product = p;

   p.store = new Store();
   p.store.storeName = "Jennings Auto Parts";
   p.store.city = "Los Angeles";

castorTest.addProduct(p);

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

Stateless Session Bean which makes JDO Calls:

Database db = ((DataObjects) (new InitialContext()).lookup("java:jdo/someName")).getDatabase();

   for(int i=0; i< ((ArrayList)newProduct.categories).size(); i++)
        db.create((Category)((ArrayList)newProduct.categories).get(i));
   db.create(newProduct.store);
   db.create(newProduct);

db.close();
System.out.println("closed!");

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

mapping.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapping PUBLIC "-//EXOLAB/Castor Mapping DTD Version 1.0//EN" "D:/castor-0.9.3.9/schema/mapping.dtd">
<mapping>

</mapping>

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

[castor-dev] Key Generator Failure

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