I've only read about 3 sentences but look into the caching point pipeline in 2.1
Geoff
At 12:52 PM 6/18/2003, you wrote:
hi, i'm evaluating cocoon to see if it suits our needs. i've used fop extensively before. and i know just enough of cocoon to be dangerous. this is kinda long but i put a lot of time in drawing in ascii to make it clearer; hopefully ;)
the problem: -------------
in keeping with the SOC, i have the following setup:
Generators: A B C --| | | | |- the data layer ----------------------- | | | Aggregation: D --| | Transformation: E ---- the | business logic -------------------------- --| | | | | |- the prettfying Formatting: rtf xsl pdf html --| layer
in the html, i refer to images (charts, which i'm generating using Fins) that are generated according to the data generated at E. But as they are subsequent requests from the browser don't have access to the data since the pipeline that generated the data was done and over with after generating the html. So, i'm left with two options:
i) regenerate the data up to E:
Generators: A B C --| | | | |- the data layer ----------------------- | | | Aggregation: D --| | Transformation: E ---- the | business logic jpg/png ---- the prettfying layer
or, ii) save the data from the pipeline into the session (from A, B, C) when generating the html and use that as such: Generator: F (reads data from the session previously set by A,B,C) and generates xml to feed into the fins transformer.
Current solution: ----------------- as option (i) would require me to regenerate the dataset, i opted to use option (ii). but then, since i can only shove the data into sessions from an xsp (?) i only have the raw form of data from (A, B, C) in the session. F would then have to do what D and E does. complete breakdown of SOC.
Wishful/hopeful thinking: ------------------------- something like this would be optimal:
Generators: A B C | | | ----------------------- | Aggregation: D | Transformation: E ----------------- tee* -- | | -------------------------- | | | | | | Formatting: rtf xsl pdf html** | | | formatted as a png/jpg/svg and stored in cocoon cache using a unique key** for the subsiquent request
*) tee as in make a copy and pass one copy to the html formatting step. and another to the image formatting step. **) the key would be predetermined so that the src element in the html would know which image url to put in. and another pipeline would deal with requests for images keyed off this way.
(That does sound out of wack. told you, i know enough to be dangerous)
So, the question is, how do you generate images that are referenced by some html when the images are another view of the data that the html is displaying without regenerating the data for the image generation? ideas?
thanks in advance, anoop [EMAIL PROTECTED]
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