I have an entity with a Key set as follows: KeyFactory.Builder keyBuilder = new KeyFactory.Builder(MyClass.class.getSimpleName(), \"uniqueString\");
I\'开发者_运维知识库m have a hard time doing this. I have done a db with JDO for google app engine that allows for a registered user to upload a photo. But now i\'m trying to delete that same photo an
I\'m really desperate right now, because I\'m building a little application that is split up into several projects. There is a web application that uses Vaadin and an EJB container that should do the
What exactly is meant by owned and unowned relationships? These terms are often used in JPA/JDO documentation, but I haven\'t found a good definition of th开发者_运维技巧em.In addition to Nix\'s anwse
I am new to GAE and my skill level in JAVA is novice to intermediate somehow.. So I need help on retriving a specific filed that is an integer from JDO, and on that do the sum all, like in excel wher
Okay, so as many 开发者_如何转开发of you may know, one can define entities with attributes like
I have a attribute of type Set in my persistable class. I am persisting to a H2 database. The class persists correctly and I can view the data using the H2 console and see the Set attribute has been s
I have written a relatively simple Java App Engin开发者_如何转开发e application which I would like to be able to port to another cloud provider.
I have a \"Parent\" entity which has a Set of \"Child\" entities, as follows: class Parent { @Persistent @Element(dependent = \"true\")
Is there anyway to transfer 开发者_如何学PythonJDOs accross RPC as DTO such in GWT, we used to have Gilead for hibernate Objects??
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