It was nice to see the ORM for hbase. I had the same idea for representing
BigTable of HBase as annotations like as follows (not realised just a
proposal):
@BigTable(name="Web")
public class Web {
//annotations for column families and many more
}
It looks similar to JPA entities and interesting would be easier for JPA
guys (as of my case) to extend their reach towards HBase.
Cheers
Shiraz
On Tue, Jul 29, 2008 at 1:00 AM, Quinn Slack <[EMAIL PROTECTED]> wrote:
> Over the last week I've made improvements to Rhino, a Ruby ORM for HBase
> that I created a while ago, and I now want to share it with this list.
>
> Post: http://qslack.com/2008/07/27/now-in-rhino/
> Git: git clone git://github.com/sqs/rhino.git
> Github: http://github.com/sqs/rhino/tree/master
> Specs: http://github.com/sqs/rhino/tree/master/spec
>
> I'd appreciate all the help and feedback I can get, from contributors,
> users, and anyone who has strong feelings about this ORM design. There's
> certainly a lot more work to be done.
>
> Features
> * Ruby
> * Uses the Thrift API
> * Basic get, put, scanning, deletion
> * Has_many and belongs_to (within a single table, not between two tables as
> in other ORMs)
> * Constraints (a.k.a. validations)
> * RSpec tests and decent docs
> * Rudimentary Rails integration (other Ruby web frameworks would work even
> better)
>
> Here's an example of a Page model that has_many links. Page is the table;
> Link consists of columns in the "link:" column family.
>
> class Page < Rhino::Model
> column_family :title
> column_family :contents
> column_family :links
> column_family :meta
> column_family :images
>
> alias_attribute :author, 'meta:author'
>
> has_many :links, Link
>
> constraint(:title_required) { |page| page.title and !page.title.empty? }
> end
>
> class Link < Rhino::Cell
> belongs_to :page
>
> # convert from com.example.www/path => www.example.com/path
> def url
> url_parts = key.split('/')
> backwards_host = url_parts.shift
> path = url_parts.join('/')
> host = backwards_host.split('.').reverse.join('.')
> "http://#{host}/#{path}";
> end
> end
>
> # now the following code will work
> page = Page.new('com.qslack.www', :title=>'My Homepage',
> :contents=>'<p>Welcome</p>', :author=>'Quinn Slack',
> :meta_language=>'en-US')
> page.title # => 'My Homepage'
> page.meta_language # => 'en-US' (from the meta:language column)
> page.links.add('com.google.www/search', 'My Favorite Search Engine')
> page.save
>
> # later on...
> page = Page.find('com.qslack.www')
> goog_link = page.links.find('com.google.www/search')
> goog_link.contents # => 'My Favorite Search Engine'
> goog_link.url # => 'http://www.google.com/search'
> goog_link.contents = 'My Second Favorite Search Engine'
> goog_link.save
>
> _____________
> Quinn Slack
> [EMAIL PROTECTED]
> http://qslack.com
>
>
>
>
>
>
>
>
>
