datanucleus

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Appengine JDO, how can I retrieve a child object knowing a child property and the parent key?

Using the peristance manager, how can I retrieve a child object knowing a child property and the parent key?[详细]

2023-03-26 04:40 分类：问答
Disable auto scanning for JDO classes datanucleus exploded war

When I deploy an开发者_运维技巧 exploded war file datanucleus fails with following error Caused by: org.datanucleus.exceptions.ClassNotResolvedException: Class \"JDOTutorial.war.WEB-INF.classes.com[详细]

2023-03-23 11:37 分类：问答
How to map collections to mongodb using datanucleus/jdo?

I\'m trying to map an existing mongodb database to domain objects using datanuclues (3.0.0-m6) / JDO.[详细]

2023-03-22 05:07 分类：问答
Deleting Child Entities in JDO

I would like to know if the following is possible in JDO. I have a 1-N relationship between a Parent and a Child class. So my classes look like[详细]

2023-03-21 20:16 分类：问答
How do I shut off the DataNucleus byte code enhancer?

For the Eclipse App Engine plugin, the answer is easy - go to the Project Propert开发者_运维百科ies -> Builders and disable the Enhancer. Is there a way to do the same in NetBeans (using the NetBeans[详细]

2023-03-16 10:41 分类：问答
DataNucleus: Write to two storages (RDBMS & file system) at once?

I\'m currently implementing a map application. Part of the data is stored in a database, part in the file system. As the amount of model objects has grown and I could additionally benefit from Lazy Lo[详细]

2023-03-16 06:40 分类：问答
Should ORM / RDBMS be used with Java desktop applications? [closed]

Closed. This question is opinion-based. It is not currently accepting answers. Want to improve this question? Update the question so it can be answered with facts and citations by editing th[详细]

2023-03-15 05:27 分类：问答
gwt google appengine with hibernate

My GWT project is setup with google app engine. Now I want to run the hibernate code in Google app engine.[详细]

2023-03-13 22:32 分类：问答
Datanucleus/JDO, persisting and retrieving java.util.Set attribute

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[详细]

2023-03-12 16:52 分类：问答
Migrating fields in JDO

We are using JDO in one of our projects. This has been running for quite a while and naturally we need to change the model a bit.[详细]

2023-03-06 04:26 分类：问答