fakeriak

An in-memory driver implementation of the Riak API. This is designed to be used in test environments to remove the external dependency of a running Riak server.

Features

The following Riak features are supported:

Server Info
Basic stats
Object lookups
Pre-2.0 counters
Bucket / Bucket Type props
List keys / buckets
Map/Reduce with Javascript
Secondary indexes
Search indexes / schemas
CRDTs

The following Riak features are currently not implemented:

Search queries with Solr
Map/Reduce with Erlang

The following Riak features are deprecated in Riak 1.x, removed in Riak 2.x, and therefore will not be supported:

Luwak file storage
Link walking

Usage

On Riak 1.x:

riak = Riak::Client.new(:nodes => ["127.0.0.1"], :protobuffs_backend => :Memory, :http_backend => :Memory)

On Riak 2.x:

riak = Riak::Client.new(:nodes => ["127.0.0.1"], :protobuffs_backend => :Memory)

To reset all the data:

riak.buckets.each do |bucket|
  bucket.keys.each {|key| bucket.delete(key)}
end

Within RSpec:

Typically this gem is used within specs in order to avoid external dependencies when running the spec suite. In order to ensure that the data is reset in each spec, you'll need to explicitly do so as part of a before or after hook in the spec helper. For example:

$riak = Riak::Client.new(:nodes => ["127.0.0.1"], :protobuffs_backend => :Memory)

RSpec.configure do |config|
  # ...

  config.before(:each) do
    $riak.buckets.each do |bucket|
      bucket.keys.each {|key| bucket.delete(key)}
    end
  end
end

Notes

Server data

One important note that is that data will be shared across servers that are configured in the same client. For example, support you configured your client like so:

riak = Riak::Client.new(:nodes => ["10.0.0.1", "10.0.0.2"], :protobuffs_backend => :Memory)

This would force data to be consistent across both the 10.0.0.1 node and the 10.0.0.2 node. As a result, creating a client with only one of those nodes would return the same results.

Testing

To test, you should use appraisal like so:

bundle exec appraisal riak-1.4 rspec
bundle exec appraisal riak-2.0 rspec
bundle exec appraisal riak-2.1 rspec

Dependencies

fakeriak has been tested and verified with with the following dependencies:

Ruby: 1.9.3+
Riak Ruby Client: 1.4+
Riak Server: 1.4+

Tapjoy/fakeriak