I have queries as below: What is the difference of these two? Are both of these supported by all databases?
I\'m just starting to take a look at java persistence (at the moment with eclipse\'s default provider of eclipselink). Basically just creating an object and attempting to persist it to the db (Oracle)
I\'m trying to use JPA\'s Context Injection. Currently my code fails to have the context injected, throwing a NullPointerException:
In the system I\'m currently working on, I\'m following SRP (I think!) by separating the validation of domain business rules vs persistence constraints.Let\'s employ the overused customer example.Say
Normally, I use Glass Fish as my testing server for NetBeans. Recently, I tried to switch to Tomcat 6.0. As soon as I changed the server, compiler no longer understand javax.persistence.Entity. When I
I placed this question in Google groups for gae java (http://groups.google.com/group/google-appengine-java/browse_thread/thread/85dc9f10d7e12a3), but sometimes it takes a week for someone to bother an
I\'m trying to learn JPA and I want create a simple Java command line app that will use JPA to query and update a database table.I mapped out the the simple code needed to do this.But I don\'t know ho
I am hitting an issue with my Hibernate backed Jpa queries returning data that is not up to date. I assume it is an issue with pulling data from the cache instead of the database itself.
I wrote a WCF service, but the data stored in the Service implementation doesn\'t persists between calls, not even if stored in a static variable. What can I do?
I am currently carrying out research for the design and implementation of a web-based RSS aggregation system, with the aim being the use and evaluation of recommendation algorithms.
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