[Fiware-developer-experience] Restaurant Context design for Orion

[Pablo Fernández Moniz]

Hi!

Trying to help, here is our opinion

Since recommendations or reviews are persistent information and not context
information, we believe that using Orion Context Broker may not be the best
approach.

In our opinion, probably the simplest option is to store the data directly
in a DB and access it using a custom REST API like:

http://<host>/addRecommendation/ [post]
body
[
    {
      "restaurant" : "ElBulli",
      "Quality" : "5",
      "Price" : "3",
      "Text" : "Great place for ....."
    },
...
 ]

--
http://<host>/getRecommendation/ElBulli [get]
Response
{
 "restaurant": "ElBulli",
 "recommendations":[
  {
      "Quality" : "5",
      "Price" : "3",
      "Text" : "Great place for ....."
  },
  {
      "Quality" : "5",
      "Price" : "4",
      "Text" : "Great place for ....."
  },
  .....
 ]
}

If we want to force to use Orion, an approach could be to insert the last
recommendation as context and use another GE to retrieve historical data:


   - We don't have experience using STH but we think that we could use it
   and ask for all recommendations of a particular restaurant in a specified
   time, or ask for the sum of elements and make an average of reviews.


   - We could use Cosmos and it may be interesting if we think that
   recommendations are Big Data. The problem could be that create an instance
   of Cosmos is not easy.

By the way. ULPGC team prepared a small system to publish data stored in
PosgreSQL DB using CKAN. It may be useful at any time. If we need it, just
ask for it


Kind regards,

ULPGC Team

2015-07-06 10:09 GMT+01:00 Alvaro del Castillo <acs at bitergia.com>:

> Hi all!
>
> In restaurants we need to store recommendations. In Orion we will store
> the context information (name, address ...) but this changing (and
> growing) information, recommendations, how should be managed in Orion?
>
> An approach could be to store the last recommendation in context
> information (orion) and the history of recommendations, to be stored in
> MySQL (for example) using cygnus.
>
> Thoughts? Should we move this kind of questions to stackoverflow?
>
> Cheers
> --
> Alvaro del Castillo San Félix
> acs at bitergia.com - Chief Technical Officer (CTO)
> http://www.bitergia.com
> "Software metrics for your peace of mind"
>
>
> _______________________________________________
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> Fiware-developer-experience at lists.fiware.org
> https://lists.fiware.org/listinfo/fiware-developer-experience
>



-- 

Pablo Fernández Moniz
GIT Analyst

Web <http://www.pablofm.com>    Linkedin
<http://www.linkedin.com/in/pablofernandezmoniz/>   Twitter
<http://www.twitter.com/monizpablo>
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