1. persisting persistence; or moving legacy webapp to non-relational store stackoverflow.comSuppose you have a huge app with a data access layer bound to SQL You want to provide other non-sql DAL, for instance a GoogleAppEngine instance or XML-based backup. How would you ... |
2. What's the easiest way to persist java objects? stackoverflow.comRight now I have java program whose classes are currently POJOs and stored in volatile memory. These need to be persisted. As I understand it two popular choices are JDO and ... |
3. How to use JDO persistence manager? stackoverflow.comI have two questions regarding how to create / use the JDO persistence manager (PM, hereafter). Say, in a Java web application, if I have 10 entities, which can be logically ... |
4. Reading a persistent object's variable prevents it from being added to an object later stackoverflow.comI am trying to make a new object Session and persist it to the database. It has a persistent variable of object User. I query the DB for the user I ... |
5. JDO getKey sometimes returns null after newly persisted ojbect stackoverflow.comI have the same question that was never resolved at the link below. Has anyone solved this? Datanucleus JDO Retrieve newly generated primary key Using JDO + GAE, after calling makePersistent, sometimes ... |