Use Singletons for BOs and DAOs with Struts?

[xMarcus]

Hi, I'm looking for some best practices guidelines when configuring business objects and DAOs with Spring when using Struts. Specifically, should these objects be set as singletons or not as singletons (singleton="false")?

If you use singletons are there any design issues that one should keep in mind (other than not to use instance variables)?

Thanks

Marcus.

[Rod Johnson]

Use of singletons is normally best practice. Whether or not you use Struts doesn't really impact the service layer. Spring MVC, like Struts, uses a single shared instance for each Action (called a Controller in Spring MVC).