Shaun Smit of Oracle did a presentation on Dali, which is a plugin for Eclipse. Using this plugin it’s easier to write EJB 3.0 entities. The plugin doesn’t have anything for session or message driven beans. It’s main goal is to make writing ejb 3 entities easier. The plugin isn’t finished yet, but looked promissing. Error information is displayed when your mappings are incorrect. You have a persistence property editor to select mapping information. And a persistence outline shows you which properties are actually going to be persisted.
Because you can configure ejb 3 entities in multiple places, xml and annotations, the actual configuration can become a bit confusing. This is one of the things that should improve with Dali.