How to store tag cloud on Google App Engine for Java (JPA is preference)

[planetjones]

Hi,

I'm looking to store entities using GAE Java which have 1-many tags. I
would like to display a tag cloud, so will need to know how many times
each tag occurs (can't use aggregate functions and group by on GAE to
do this like I would in SQL). And when I click a tag I would like to
retrieve all entities with the selected tag.

Does anyone have any examples of what my Classes should look like to
do this optimally and efficiently? Sample JPA code would be great too.

Cheers - Jonathan

[Ikai L (Google)]

I'd keep an Entity with counts and also store each Tag inside a List property. To visualize it, I'd use this library:

http://code.google.com/p/word-cumulus-goog-vis/wiki/UserGuide

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