datanucleus

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Is there a good step-by-step tutorial for using datanucleus and maven?

I have a basic java-maven-wicket project and need a persistence layer. I want to start with something fairly simple and low maintenance so I can concentrate on the business logic. I\'ve been using db4[详细]

2023-01-17 14:29 分类：问答
How to query for an interface and filter the resultset with JDOQL?

I have an interface @PersistenceCapable public interface MyInterface { public abstract String getName();[详细]

2023-01-15 11:58 分类：问答
How to use JDO(DataNucleus) to Update & Delete data?

I\'ve set up a small project using apache.JDO /w DataNucleus. I can save data w/o any problems, but I got stuck when trying to update or delete them.[详细]

2023-01-14 08:22 分类：问答
Using sets in JDO

I have a model which contains a java.util.Set object as a 开发者_开发百科member. How do I persist this using JDO? Specifically, how do I define the XML in the .jdo file?[详细]

2023-01-14 07:28 分类：问答
How to configure a Google Web Toolkit application with Datanucleus + PostgreSQL

I created an application using GWT and support for the Google Datastore but now i\'m trying to move my application to my own server and i\'m also trying to detach my app from Google App Engine and fro[详细]

2023-01-12 01:55 分类：问答
IS DataNucleus GAE JPQL different from JPA1 standard?

开发者_StackOverflow社区Query q = em.createQuery(\"SELECT u FROM SSUser u WHERE u.emailId=?1\") .setParameter(1, email);[详细]

2023-01-11 01:00 分类：问答
Entity groups

I\'m experimenting a bit with google app engine and the lack of a transaction di framework is missing. I\'m implementing it as good as I can, but I\'m hitting the same exception again and again:[详细]

2023-01-10 15:13 分类：问答
Specifying an Index (Non-Unique Key) Using JPA

How do you define a field, eg email as having an index using JPA annotations. We need a non-unique key on email because there are literally millions of queries on this field per day, and its a bit slo[详细]

2023-01-09 23:53 分类：问答
"org.datanucleus" is already registered under Spring Source Toosuite

Exception in thread \"main\" Plugin (Bundle) \"org.datanucleus\" is already registered. Ensure you dont have multiple JAR versions of the same plugin in the classpath. The URL \"file:/home/zakaria/.m2[详细]

2023-01-08 03:37 分类：问答
Google App Engine using maven

I\'ve been trying to create a single project which can run both on sql and gae (where the \'datanucleus.properties\' file needs to be changed) under a single maven folder structure. I first tried to g[详细]

2023-01-07 04:24 分类：问答