persistence

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websphere 7 and (application based) open-jpa 2

I want to not use the built in Websphere 7 jpa plugin, instead use an application WEB-INF/lib/open-jpa 2 and a proprietary persistence provider.I cannot install the OSGI and JPA 2 feature pack for Web[详细]

2023-03-30 06:51 分类：问答
Persistent Data Object Implementation

I have a page where a user can edit a lot of information, right now about 100 lines worth of DDLs and a text area, I want to update a data object after each change so that I only have to save to the d[详细]

2023-03-30 03:06 分类：问答
Using multiple databases in a Spring JPA application

I have a Spring application which supports a single customer. I would like to extend t开发者_开发技巧his application to support multiple customers where each customers database is stored in a separat[详细]

2023-03-29 18:33 分类：问答
Google App Engine datastore remote integration

How would one go about using the Google App Engine datastore as a database for remote stand alone java programs?[详细]

2023-03-29 15:46 分类：问答
Can't find entities in PersistenceContext after .persist()

I am writing a JavaEE Project and am trying to get some unit tests on the way. The unit testing framework we use is JUnit, alongside Maven and Hudson for building and CI.[详细]

2023-03-29 10:43 分类：问答
Inject attribute into JPQL SELECT clause

Let\'s depict the following use case: I have a JPQL Query which on the fly creates data objects using the new keyword. In the SELECT clause I would like to inject an attribute which is not known to th[详细]

2023-03-29 03:13 分类：问答
Hibernate partial update (How to?)

I have a performance problem with a hibernate implementation that is far to performance costly. I will try to explain my current implementation which must be improved upon with pseudo classes.[详细]

2023-03-28 22:15 分类：问答
Using the global object as storage

I have made an application that is receiving location data from a few web clients on regular intervals. I made a quick implementation using couchdb, but as couchdb creates a new revision for each upda[详细]

2023-03-28 20:11 分类：问答
Has anyone tried to use javax.persistence on Android?

Has anyone tried to use javax.persistenc开发者_开发技巧e on Android by getting the source or jar and adding it to their project?Odds are, you will not be able to add the JAR or source. The Android bui[详细]

2023-03-28 19:55 分类：问答
How to get SingularAttribute mapped value of a persistent object?

I have a persistent object (Action) and auto generated data model (Action_). By having an object of Action class and an instance of SingularAttribute, is it possible to get the field corresponding to[详细]

2023-03-28 15:28 分类：问答