Rails spinoffs - May 2008 - Advice on graceful way of queing requests w/ prototype?

Hi people!
I am using prototype /scriptacolous and have the user send a fair
amount of ajax requests to the server.
The cronological order of some of the requests are important:

1. Req A tries to store a structure in the DB
2. Req B tries to add an item to the new structure and simply assumes
the REQ A was successful and completed.

My question:
Does anyone know if there is a graceful/clever way of cueing requests
like these in prototype?

thanks a million, in advance

Pelle
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Put Req B in a function and pass the function to the OnComplete
parameter in Req A.

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Parlin wrote:
> Hi people!
> I am using prototype /scriptacolous and have the user send a fair
> amount of ajax requests to the server.
> The cronological order of some of the requests are important:
>
> 1. Req A tries to store a structure in the DB
> 2. Req B tries to add an item to the new structure and simply assumes
> the REQ A was successful and completed.
>
> My question:
> Does anyone know if there is a graceful/clever way of cueing requests
> like these in prototype?
>
> thanks a million, in advance
>
> Pelle
You could make a simple generic queue class, but I think you would have 
more flexibility and clarity if you accomplished this type of operation 
with a class object.  See my idea here: http://pastie.caboo.se/199736. 

However, what is the situation?  Obviously it doesn''t make sense to
have
two links where clicking on one is pre-requisite to clicking the other.  
And usually with an A and B functionality you don''t offer the ability
to
perform B until you hear back from A (e.g. digg.com''s functionality to 
digg then mark as favorite).

And don''t forget to account for hacking... Calling script B on the 
server should not cause data anomalies.

- Ken Snyder

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