Setting and accessing Context and Session data
Hello all, More newbie questions. I just want to make sure I understand the idea on how to write a Struts application properly. How do you save something to the Session scope and then access it within Struts? I pretty much understand how to do it within a Servlet. How do you do the same for the Context? I also know how to do it in a Servlet. Can a Model Class access or set anything in the Session or in the Context space? Say that you want to access a database based on a parameter set on the Session? Shall I make a getter for this model class and pass the parameter through an Action call or can I access the Session data from a Model Class? Then I guess my Model Class should extend some Struts class that would provide access to both the Session and the Context. Are Model Classes instances unique for every Session? Or one instance is common to everyone? I guess I am concerned with data state here and I just want to make sure how it works. Thanks again! C.F. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Setting and accessing Context and Session data
C.F. Scheidecker Antunes wrote: How do you save something to the Session scope and then access it within Struts? I pretty much understand how to do it within a Servlet. How do you do the same for the Context? I also know how to do it in a Servlet. Same way; inside your Actions you can get the session through the request and the context through getServlet().getContext() (minus whatever end-of-day errors I've made) Dave Shall I make a getter for this model class and pass the parameter through an Action call or can I access the Session data from a Model Class? Then I guess my Model Class should extend some Struts class that would provide access to both the Session and the Context. Yuck. In general you'd want to decouple your model from both Struts and web applications. This provides lots of benefits like testability and reuse (say in a standalone desktop app). Dave - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Setting and accessing Context and Session data
On 8/9/05, C.F. Scheidecker Antunes [EMAIL PROTECTED] wrote: How do you save something to the Session scope and then access it within Struts? I pretty much understand how to do it within a Servlet. You can do this directly, or you can setup your ActionForm class to have session scope. ActionForm is simply a bean which lifecycle is controlled by Struts using scope setting that you set in action element of config file. If you select request scope, Struts will stick ActionForm in request object. If you select session scope, Struts will stick ActionForm into the session. The form-beans section of config file defines keys, under which Struts stores ActionForm objects in implicit scope objects. In a sense, ActionForm is just a [convenient?] container for the stuff related to an action. I personally find it easier to have everything related to an action in a corresponding ActionForm. If I need to store data during several requests, I use session scope for an ActionForm. Another approach is to use request scope for ActionForms, and to save session-scoped stuff directly into session object. Michael. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]