Class: Lieutenant::EventStore::InMemory

Inherits:
Object
  • Object
show all
Defined in:
lib/lieutenant/event_store/in_memory.rb

Overview

Memory implementation of the event store. Stores events while the application is running

Instance Method Summary collapse

Constructor Details

#initialize ⇒ InMemory

Returns a new instance of InMemory.



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# File 'lib/lieutenant/event_store/in_memory.rb', line 7

def initialize
  @store = {}
end

Instance Method Details

#aggregate_sequence_number(aggregate_id) ⇒ Object 



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# File 'lib/lieutenant/event_store/in_memory.rb', line 21

def aggregate_sequence_number(aggregate_id)
  return -1 unless store.key?(aggregate_id)
  store[aggregate_id].last.sequence_number
end

#event_stream_for(aggregate_id) ⇒ Object 



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# File 'lib/lieutenant/event_store/in_memory.rb', line 15

def event_stream_for(aggregate_id)
  events = store[aggregate_id]
  return nil unless events
  Enumerator.new { |yielder| events.each(&yielder.method(:<<)) }
end

#persist(events) ⇒ Object 



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# File 'lib/lieutenant/event_store/in_memory.rb', line 11

def persist(events)
  events.each { |event| (store[event.aggregate_id] ||= []).push(event) }
end

#transaction ⇒ Object 



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# File 'lib/lieutenant/event_store/in_memory.rb', line 26

def transaction
  # In memory event store currently does not support transactions.
  yield
end