Merge 2df77eb into 1998996

.gitignore

@@ -19,3 +19,4 @@ Gemfile.lock
 _yardoc
 doc/
 .idea
+Dockerfile

README.md

@@ -258,9 +258,6 @@ If there is a lot of events saved to an aggregate it can take some time to reloa
 
 There is one global snapshot store where all snapshots are stored independent on aggregate_type. To enable snapshot on a aggregate_type the Class has to be added to the `snapshot_types` Array when configuring Sandthorn. The aggregate will now be stored to the snapshot_store on every `.save` and when using `.find` it will look for a snapshot of the requested aggregate.
 
-Currently its only possible to store the snapshots in memory, so be careful not draining your applications memory space.
-
-
 ```ruby
 
 class Board
@@ -272,7 +269,7 @@ Sandthorn.configure do |c|
 end
 ```
 
-Its also possible to take manual snapshots without enabling snapshots on the aggregate_type.
+Its possible to take manual snapshots without enabling snapshots on the aggregate_type.
 
 ```ruby
 board = Board.new
@@ -285,6 +282,18 @@ Sandthorn.save_snapshot board
 snapshot = Sandthorn.find_snapshot board.aggregate_id
 ```
 
+### External snapshot store
+
+Currently there is no external snapshot stores available but this is how `Sandthorn` should be configured with one when there is.
+
+```ruby
+Sandthorn.configure do |conf|
+  conf.snapshot_store = <snapshot_store_driver>
+end
+```
+
+**Currently its only possible to store the snapshots in the application memory (be careful not draining your application memory space).**
+
 ## Bounded Context
 
 A bounded context is a system divider that split large systems into smaller parts. [Bounded Context by Martin Fowler](http://martinfowler.com/bliki/BoundedContext.html)

lib/sandthorn.rb

@@ -2,7 +2,7 @@
 require "sandthorn/errors"
 require "sandthorn/aggregate_root"
 require "sandthorn/event_stores"
-require "sandthorn/snapshot_store"
+require "sandthorn/application_snapshot_store"
 require 'yaml'
 require 'securerandom'
 
@@ -83,16 +83,20 @@ def event_stores
         @event_stores ||= EventStores.new
       end
 
-      def event_store=(store)
-        @event_stores = EventStores.new(store)
+      def event_store=(event_store)
+        @event_stores = EventStores.new(event_store)
       end
 
       def map_types= data
         @event_stores.map_types data
       end
 
       def snapshot_store
-        @snapshot_store ||= SnapshotStore.new
+        @snapshot_store ||= ApplicationSnapshotStore.new
+      end
+
+      def snapshot_store=(snapshot_store)
+        @snapshot_store = snapshot_store
       end
 
       def snapshot_types= aggregate_types

lib/sandthorn/application_snapshot_store.rb

@@ -0,0 +1,17 @@
+module Sandthorn
+  class ApplicationSnapshotStore
+  	def initialize
+      @store = Hash.new
+    end
+
+    attr_reader :store
+
+    def save aggregate_id, aggregate
+      @store[aggregate_id] = aggregate
+    end
+
+    def find aggregate_id
+      @store[aggregate_id]
+    end
+  end
+end