Yes, if you bind to an action that falls out of the backtrack cache,
you'll get that error. This can happen for several reasons.
Not sure what you mean about using component actions and direct
actions freely. Component actions are powerful but just have intrinsic
limitations. If you have a long running process on the client side
that could reasonably run longer than your session timeout, you either
have to keep the session alive with some sort of ping in the
background (I think Ajax framework has a component for this), or you
need to switch to direct actions. DA's can fully access the session,
but you have the same issue -- if your client process takes longer
than your session lifetime, you're going to lose that information. In
the DA case, that either means the same sort of ping process, or it
means making your app stateless (i.e. client side tracks and passes in
the current state).
ms
On Jul 8, 2009, at 2:01 AM, shravan kumar wrote:
Thanks for your response Mike.
What is Giandiua btw? Google says it is a Chocolate from Italy!!!
The page am referring is just one of the pages of a wizard, which
has sub-pages. The whole wizard runs through component actions.
I was actually about following situation:
When we have long response component displayed upon initiating a
request, and we see long response until we have a response. Once
after the response let's say I just hide long response component and
show the main component, now user cannot perform any actions in this
main component and we might receive errors like: You have exceeded
30 pages limit/ page out of cache... this is because the context
bound to the action element is older. Am I correct (Mike) ?
I understand by your saying switching to direct actions, we can get
away from this issue if we use direct actions. But am wondering if I
can use component actions and direct actions freely. I hope I can
validate whether the direct action request is initiated by a logged-
in valid user, so my direct actions are not floating freely.
---------------
If I use component actions, can you advise me how can I have all the
elements, app in the latest context?
Thank You,
Shravan Kumar. M
--------------------------------------
Monday, July 6, 2009 7:14 PM
From:
"Mike Schrag" <msch...@mdimension.com>
To:
"WO Dev Group" <webobjects-dev@lists.apple.com>
seems to me like you're swimming against the tide here ... i think
you need to rethink this architecture. you're basically sending the
users the entire site, which makes this more of a Sproutcore/
Giandiua/etc workflow, and mixing component actions into this style
of app is going to be very tricky. I would recommend switching to
directactions. you could keep a session alive with a ping if you
really need it to be sessionful, but trying to actually use WOForms
in this thing is going to be an endless headache imo.
On Jul 6, 2009, at 7:54 AM, shravan kumar wrote:
Hi Group,
Could you please advise me a solution to achieve below functionality:
Scenario:
-------------
I have a page which gets all the data like text content [3000 lines
or more], images info [about 500 or more] once when the user
requests for this page.
Once this data from the server has arrived, we will be displaying
this whole data part by part by splitting this data into sub-pages
through javascript. So, user actually sees the sub-page rather the
whole page received from the server.
There can be around 40 sub-pages or more.
While navigating through each of these sub-pages user may perform a
server action like edit some text and save, rotate an image and
save, ... and all these actions do not refresh the whole page/ sub-
page (like we see in ajax implementations) and just update a
particular field.
I assume that there might be some time-gap say 10 minutes or more
between each of the server actions performed by the user.
During these times as you know, we have to maintain the session of
this user in the server (this can be achieved through lets say
session timeout value), state of this page in the server, ...
Problem:
-------------
How can I maintain the state of this page (generally whenever we do
a submit WO app returns with a new context info, correct?), so all
my actions are valid and there are issues of Broken pipe/ page not
in the cache/ ...
I thought of just pinging the server every few seconds for some
dummy data like: how are you doing? or something like gmail does?
However, I do not know how to exactly implement this behavior.
Please advise.
Thanks in advance,
Shravan Kumar. M
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