Cube

Talk to the OLAP based backend via XMLA SOAP messages from Ruby. You can send (simple) MDX queries and get the result back in a human friendly from.

When harnessing OLAP power you are one tiny step away from graphs like this (highcharts.js) on a real online system. That is why it is worthed to mess with OLAP providers.

Installation

Add to Gemfile

gem 'cube'

Configuration

Set up your catalog and endpoint

XMLA.configure do |c|
 c.catalog = "OUTAGE"
 c.endpoint = "http://localhost:8383/mondrian/xmla"
end

Querying the OLAP

table = XMLA::Cube.execute <<-MDX
    SELECT [Location].[City].children  on COLUMNS,
           [Measures].[Count] on ROWS
    FROM [OUTAGE]"
MDX

Table has two attributes: header and rows.

Scalar results

average_mtbf = XMLA::Cube.execute_scalar <<-MDX
   SELECT {Hierarchize({[Measures].[MTBF]})} ON COLUMNS
   FROM [OUTAGE]
   WHERE [Country].[Croatia]
MDX

Limitations

No drill down (fails to even parse the result)
No multi named columns
Tested only with icCube and Mondrian XMLA, in theory works with every XMLA provider

Contributing to cube

Check out the latest master to make sure the feature hasn't been implemented or the bug hasn't been fixed yet
Check out the issue tracker to make sure someone already hasn't requested it and/or contributed it
Fork the project
Start a feature/bugfix branch
Commit and push until you are happy with your contribution
Make sure to add tests for it. This is important so I don't break it in a future version unintentionally.
Please try not to mess with the Rakefile, version, or history. If you want to have your own version, or is otherwise necessary, that is fine, but please isolate to its own commit so I can cherry-pick around it.

cube

Runtime