ocean-dynamo 0.3.0

OceanDynamo

This is the OceanDynamo ruby gem, implementing a highly scalable Amazon DynamoDB near drop-in replacement for ActiveRecord.

As one important use case for OceanDynamo is to facilitate the conversion of SQL based ActiveRecord models to DynamoDB based models, it is important that the syntax and semantics of OceanDynamo’s operations are as close as possible to those of ActiveRecord, including callbacks, exceptions and support methods. Ocean-dynamo follows this pattern closely and is of course based on ActiveModel.

The attribute and persistence layer of OceanDynamo is modeled on that of ActiveRecord: there’s save, save!, create, update, update!, update_attributes and all the other methods you’re used to. The design goal is always to implement as much as possible of the ActiveRecord interface, without sacrificing scalability. This makes the task of switching from SQL to no-SQL much easier.

OceanDynamo will use secondary indices to retrieve related table items, which means OceanDynamo tables will scale without limits.

Thanks to its structural similarity to ActiveRecord, OceanDynamo works with FactoryGirl. To facilitate testing, future versions will keep track of and delete instances after tests.

See also Ocean, a Rails framework for creating highly scalable SOAs in the cloud, in which ocean-dynamo is used as a central component: wiki.oceanframework.net