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From Martin Stiborský <martin.stibor...@gmail.com>
Subject Re: Split, transform and aggregate RSS XML feed
Date Sat, 03 Nov 2012 11:37:15 GMT
Hello,
I guess my crappy english took it place, because I think enricher is not
the thing I need.

What I need, is a RSS feed on input and the same RSS on output, but in JSON
format. I don't need to add there any other content, any other RSS, just
the transformation/converting to JSON.

The solution I have and I described here, is not ideal I guess. I was
thinking that split the RSS feed is a good idea, once it's splitted I can
parse one chunk per time, convert them into POJO classes which holds the
one feed chunk data and at the end, go through the List of POJO classes on
send them  back to browser in JSON.

Maybe, I could skipp the splitting and process the whole RSS XML feed,
maybe with XSLT, I don't know and I don't like XSLT :)

I have to figure it out somehow.


On Fri, Nov 2, 2012 at 4:59 PM, <Ramkumar.Iyer@cognizant.com> wrote:

> I am not sure if I understand you rightly but have you looked at content
> enricher EIP. Basically you have RSS feeds that are enriched through a
> split-aggregate. Example merge RSS feeds for "USA" across multiple articles
> creating one RSS feed for "USA" etc.
>
> http://camel.apache.org/content-enricher.html
> The content enricher (enrich) retrieves additional data from a resource
> endpoint in order to enrich an incoming message (contained in the original
> exchange). An aggregation strategy is used to combine the original exchange
> and the resource exchange.
> -----Original Message-----
> From: Martin Stiborský [mailto:martin.stiborsky@gmail.com]
> Sent: Friday, November 02, 2012 8:19 PM
> To: users@camel.apache.org
> Subject: Split, transform and aggregate RSS XML feed
>
> Hello,
> currently I'm working on a case, where is RSS XML feed as data source,
> which I need to grab and parse/transform in to POJO classes structure and
> the return back as JSON.
>
> Concerning the relevant route in Camel, I have restlet as the consumer
> endpoint (there are few things needed to declare in the GET request to
> fetch needed RSS feed). In the middle is a Camel HTTP component to fetch
> the RSS XML feed and then should follow some transformation strategy to
> POJO classes and then send  response back to browser/user (producer
> endpoint).
>
> The structure of the RSS XML feed is nothing tricky, it has simple
> structure, simply there is a tag I know, which should be used to split by,
> to get each chunk of the feed.
>
> So, I tried tokenizeXML() to split the feed. Good, it works. Then, I tried
> custom Aggregation Strategy, to get all pieces back together. Works as
> well.
> But, where in this scenario fit the transformation part? Right in the
> Aggregation Strategy? Why not, it works as well for me. But I'm not sure,
> if all that is correct.
>
> There should be separated transformation step in the route, what you say?
>
> Thanks for hints, guys!
>
> --
> S pozdravem
> Martin Stiborský
>
> Jabber: stibi@njs.netlab.cz
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-- 
S pozdravem
Martin Stiborský

Jabber: stibi@njs.netlab.cz

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