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RE: [Springframework-developer] Web Flow - Complex State Transitions
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From: Will B. <wil...@ra...> - 2005-03-29 13:33:33
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Sure. We are currently building flows to support CRUD operations on our domain objects. Let's just look at the create case, as it illustrates our problem. The user clicks a button in our application to create a new domain object. This pops up a window that contains the appropriate form. At the bottom of the form, we have buttons for Save (create and continue editing), Save and New (create and new blank form), Save and Close (create and close popup), and Cancel (close without saving). When the user clicks any of the three Save buttons, the web flow must initially do the same thing, regardless of which one was pressed (bind and create domain object). After it has finished doing that, however, all three have different behavior. The Save (create and continue editing) button brings up another interesting issue... Because we have defined each of our CRUD operations in a separate web flow, we really want to forward directly to our edit web flow after creating (we don't want to nest a subflow). While this is possible using end state and a view (forward:...), it isn't possible to send any request attributes along to the edit flow. Therefore, it is not possible to send the primary key of the domain object that we wish to edit. For now, we are working with a top level flow that contains subflow states representing each CRUD operation. By using an attribute mapper, we are trying to pass attributes from one subflow to another. It seems to be overkill however, as we really just want to be able to have end states that forward to a flow with attributes mapped. Again, perhaps we are missing something that would better support what we are trying to do? Thanks, Will On Mon, 2005-03-28 at 18:12 -0500, Keith Donald wrote: > Hmm.... Erwin and I were discussin the other day whether or not we needed > flow state/event history. Seems like if we had it, that might be a better > solution to your problem. Can you describe the use case for what you're > trying to do, just to get some more background? > > -----Original Message----- > From: spr...@li... > [mailto:spr...@li...] On Behalf Of > Will Butler > Sent: Monday, March 28, 2005 5:40 PM > To: spr...@li... > Subject: [Springframework-developer] Web Flow - Complex State Transitions > > How should you do this in web flow? > > > formState --(eventA, eventB, eventC)--> state1 ----> state2 --(?)--> > > We have a form that can submit three separate events (eventA, eventB, > and eventC). In the web flow, we want all three events to go to state1, > then state2, then branch to another state based on the event fired from > formState. > > > formState --(eventA)--> subFlowState1 --(eventX)--> > formState --(eventB)--> subFlowState2 --(eventY)--> > formState --(eventC)--> subFlowState3 --(eventZ)--> > > Right now, we have resorted to creating a subFlow that contains state1 > and state2 and then defining three separate subFlow states > (subFlowState1, subFlowState2, and subFlowState3) in the parent flow > using the same subFlow definition with different transitions. > > Because we have several cases like this, the number of subFlows required > is getting a little unwieldy. Anyone else have any suggestions as to > how we could do this in a better way? > > Thanks, > > Will Butler > > > ------------------------------------------------------- > SF email is sponsored by - The IT Product Guide > Read honest & candid reviews on hundreds of IT Products from real users. > Discover which products truly live up to the hype. Start reading now. > http://ads.osdn.com/?ad_id=6595&alloc_id=14396&op=click > _______________________________________________ > Springframework-developer mailing list > Spr...@li... > https://lists.sourceforge.net/lists/listinfo/springframework-developer > > > > ------------------------------------------------------- > SF email is sponsored by - The IT Product Guide > Read honest & candid reviews on hundreds of IT Products from real users. > Discover which products truly live up to the hype. Start reading now. > http://ads.osdn.com/?ad_id=6595&alloc_id=14396&op=click > _______________________________________________ > Springframework-developer mailing list > Spr...@li... > https://lists.sourceforge.net/lists/listinfo/springframework-developer |
