Class: Eventus::Persistence::InMemory

Inherits:
Object
  • Object
show all
Defined in:
lib/eventus/persistence/in_memory.rb

Instance Method Summary collapse

Constructor Details

#initialize(options = {}) ⇒ InMemory

Returns a new instance of InMemory.



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# File 'lib/eventus/persistence/in_memory.rb', line 5

def initialize(options = {})
  @store = {}
  @serializer = options.fetch(:serializer) { Eventus::Serializers::Marshal }
  @mutex = Mutex.new
end

Instance Method Details

#build_key(id, index) ⇒ Object 



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# File 'lib/eventus/persistence/in_memory.rb', line 54

def build_key(id, index)
  id + ("_%07d" % index)
end

#commit(events) ⇒ Object 



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# File 'lib/eventus/persistence/in_memory.rb', line 11

def commit(events)
  @mutex.synchronize do
    pending = {}
    events.each do |event|
      key = build_key(event['sid'], event['sequence'])
      raise Eventus::ConcurrencyError if @store.include? key
      value = @serializer.serialize(event)
      pending[key] = value
    end
    @store.merge! pending
  end
end

#load(id, min = nil) ⇒ Object 



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# File 'lib/eventus/persistence/in_memory.rb', line 24

def load(id, min=nil)
  @mutex.synchronize do
    keys = @store.keys.select { |k| k.start_with? id }.sort

    if min
      min_key = build_key(id, min)
      keys = keys.drop_while { |k| k != min_key }
    end

    keys.map { |k| @serializer.deserialize(@store[k]) }
  end
end

#load_undispatched ⇒ Object 



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# File 'lib/eventus/persistence/in_memory.rb', line 37

def load_undispatched
  @mutex.synchronize do
    @store.map { |k,v| @serializer.deserialize(v) }
          .reject { |e| e['dispatched'] || e[:dispatched] }
  end
end

#mark_dispatched(stream_id, sequence) ⇒ Object 



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# File 'lib/eventus/persistence/in_memory.rb', line 44

def mark_dispatched(stream_id, sequence)
  key = build_key(stream_id, sequence)
  value = @store[key]
  return unless value
  event = @serializer.deserialize(value)
  event['dispatched'] = true
  obj = @serializer.serialize(event)
  @store[key] = obj
end