posted 13 years ago
For one, CMP (i.e. a full J2EE stack) is heavier than just a JDO implementation. Furthermore, CMP as the implementation technology tends to affect your design more intrusively than JDO, which is close to transparent.
Well, JDO is a standard as in "there's a JSR for it in the JCP", but CMP is certainly more widely used to date.I know CMP is the standard, and JDO is not.
Both technologies support transactions.What about the transaction management?
Standard interfaces? Really, the question is kinda weird as JDO is a standard API while DAO is a design pattern...What doe JDO has, but DAO can not do?