Jared,

 

Excellent feedback my man, thank you. I'm all for constructing this as an
action pack, I've used a few of them in the past and understand the
benefits, I'm trying to work as much of my model into little action packs as
possible for my own peace of mind, I'll post them on RIAForge as they become
available, I have a few other little concepts brewing in my mind.

 

Your idea about placing this in the onRequestStart makes really great sense,
like you say, centralizing it in a location make it much more manageable and
easy to find, especially on a larger application it'd be bugger hunting
through it all to find them. I'll definitely take that concept into account.
Is that available in MG:U? Something in the back of my brain says its only
an MG:G thing?

 

So my next thought on this process is with events which negate certain other
events. For instance, my user has a recent events list which contains
something like this:

 

.         Viewed Customer: Robert Rawlins

 

But they then go and delete that customer! Now, if they were to click the
link in the recent events list they would get an error as the customer no
longer exists. Now, sure thing I could just use some tricky which notified
them that the user that the customer had been deleted, but it would be SO
much better to have that trace removed from the recent tasks list all
together.

 

How would you go about approaching that? See if you can figure it out in
less than 3 nanoseconds ;-)

 

Cheers J, I appreciate your thoughts,

 

Rob

 

From: [email protected] [mailto:[EMAIL PROTECTED] On
Behalf Of Jared Rypka-Hauer
Sent: 09 October 2008 18:10
To: [email protected]
Subject: [Model-Glue] Re: A recent tasks toolbar.

 

Rob,

 

As for being able to get the initial event data (i.e. form and url vars) no,
MG (I don't think any of the frameworks do) doesn't have a special handler
for that. At least I don't think it does... hrm, now I have to go look,
damnit... one sec.

 

>> play Jeopardy theme song <<

>> lost 2 minutes to looking <<

 

Nope... form and URL are captured per-request and passed into a collection
that's passed into the event and thence it makes no distinction between the
original sources for the data in the Event. Sorry. This may be something
useful for later, though... I'll see about it.

 

One quick point of clarification... "Viewstate_variables" is actually a
misnomer in that the ViewState only exists in views and is an instance of
modelglue.bean.GenericCollection, but within the controllers it's actually
an instance of modelglue.unity.eventrequest.EventContext. Maybe call it
"event_values" or even "eventKeys" or "persistStateKeys" or something? No
matter, just being anal, sorry. ;)

 

In all honesty, since you're going to be capturing only one or two variables
for this, you have a couple approaches you could take... an array of structs
where each struct has a particular, consistent set of keys... an array of
ActivityHistory objects with behaviors for building links, even something
like session.ActivityHistoryCollection that wraps an array of
ActivityHistory objects... but in any case, you're going to be way better
off building this to force the use of the viewstate_values for anything that
needs values from the Event... because there's a limit set of values you
need from the Event and there's going to be a consistent set of them for
every single task in question, it's most likely the safest and easiest way
to go.

 

This is just a suggestion, so take it for what it's worth, but you might
consider building this around ModelGlue.onRequestStart instead of every
specific event you want to track. I can see the value of just putting the
broadcast in each event you're going to be tracking too... this is just a
bit more generic and, therefore, a tad more flexible.  You could maintain
your idea if you gave it XML of the following sort:

 

<event-handler name="ModelGlue.onRequestStart">

      <broadcasts>

            <message name="trackEvent">

                  <argument name="event" value="customer.save" />

                  <argument name="title" value="Edited Customer:
[customer_name]" />

                  <argument name="persistState" value="customer_name,
customer_id" />

            </message>

            <message name="trackEvent">

                  <argument name="event" value="callLog.view" />

                  <argument name="title" value="Viewed Call Log" />

                  <argument name="persistState" value="" />

            </message>

      </broadcasts>

</event-handler>

 

This will allow you to treat your Recent Activities almost like a
preprocessor plugin. The controller method would check
event.getArguments("event") against event.getValue("event") on each
broadcast to find out if this is something it's been told to track and if
so, do it's thang... if not it would just exit. This will allow you to
capture the data you want, when you want, without incurring a lot of
overhead (because a cfif takes something like 3 nanoseconds to run hehe) and
without repeating that XML on every event you're going to be tracking. It it
also centralizes your configuration, and, potentially, gives you the option
changing <argument name="event" value="event.name" /> to <argument
event="events" value="event.name,otherevent.name,somefooevent.name" /> on
the off chance that you want to run the same intercept/process on more than
one event.

 

 

I might suggest that you actually build this as an actionpack and submit it
to the project or list it on RIA forge. Actionpacks are very cool and not
hard to build... you'd basically build it the way you would normally and
then <include /> it into your MG app anyway. I think something like this
isn't an uncommon task and is an ideal candidate for an actionpack.

 

Good idea, btw... I like it.

 

Laterz,

J

 

On Oct 9, 2008, at 6:54 AM, Robert Rawlins wrote:





Yeah, I think you're quite right, the viewstate often contains all kinds of
objects which were retrieved by other broadcasts on the event using the
viewstate values from any submitted forms and URL's.

 

I'm now in two minds as to whether I should perhaps make the
viewstate_variables argument optional, if it is not supplied then the stored
link is formed using all available form and url variables. I could
presumably do this by using a structAppend(), however, does MG have any
methods for getting the base viewstate, as in, just the FORM and URL
variables?

 

Cheers J,

 

Rob



 


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