Spring Data support for Riak

The spring-data-riak module strives to make working with Riak painless by providing the developer several different ways to easily access or store data using the Riak Key/Value store.

Recent Changes:

12/20/2010: AsyncRiakTemplate and Groovy DSL

Groovy DSL

One cool new feature just added is a Groovy DSL for data access using SDKV/Riak:

def riak = new RiakBuilder(riakTemplate)
def result = null

riak.set(bucket: "test", key: "test", qos: [dw: "all"], value: obj, wait: 3000L) {

  completed(when: { v -> v.integer == 12 }) { v, meta ->
    result = v.test
  }
  completed { v -> result = "otherwise" }

  failed { e -> println "failure: $e" }

}

Some things to note here:

The Groovy DSL utilizes the new AsyncRiakTemplate, so all closure calls happen asynchronously. To block execution until the operation has completed, provide a non-zero timeout value as the wait parameter.
Callbacks are defined as either completed or failed closures. In addition to the closure, you can define a "guard" closure, which is called before the main closure and should return non-null or Boolean true if the closure should be executed or null or Boolean false if the closure is to be skipped. This functionality is inspired by the use of (guard expression in Erlang case statements)[http://en.wikibooks.org/wiki/Erlang_Programming/guards].