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Article: Get a better handle on Struts actions, with Spring

Submitted by Colin Sampaleanu on Thu, 2005-10-13 12:41

Get a better handle on Struts actions, with Spring, a DeveloperWorks article by George Franciscus, provides a detailed look at the 3 primary variations in how the Struts web UI framework may be integrated with Spring.

 

Good Article contains a possible Struts No No

Submitted by cressie176 on Fri, 2005-11-11 17:28.

I thought this artilcle was exceptionally good, but was concerned that the third recipe demonstrates DI in a struts action class by 'setting' the BookService member variable.

I've always understood that Struts action classes are similar to Servlets, so use of member variables (unless they are thread safe) is to be avoided.

Yes Yes

Submitted by GeorgeFranciscus on Wed, 2005-11-23 19:12.

Since struts actions are cached, they must be thread-safe. That does't mean that you can't use instance variables. If those instance variables are thread safe, and the objects they reference are thread-safe, then everything is good. Servlets suffer the same problem because Servlets are pooled by the container. By default Spring delivers singletons. As long as the services are thread-safe (as all singletons should be), there is no danger.