Class: SandthornDriverEventStore::EventAccess

Inherits:
Access::Base
  • Object
show all
Defined in:
lib/sandthorn_driver_event_store/access/event_access.rb

Instance Method Summary collapse

Methods inherited from Access::Base

#initialize

Constructor Details

This class inherits a constructor from SandthornDriverEventStore::Access::Base

Instance Method Details

#find_events(aggregate_id, aggregate_type, after_aggregate_version = 0) ⇒ Object 



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# File 'lib/sandthorn_driver_event_store/access/event_access.rb', line 21

def find_events(aggregate_id, aggregate_type, after_aggregate_version = 0)
  stream_name = aggregate_type.to_s + "-" + aggregate_id
  return storage.read_events_forward(stream_name, after_aggregate_version, 2000).reverse.map { |event|
    aggregate_id = event.stream_name.partition('-').last
    {
      event_data:         JSON.parse(event.data.to_json, symbolize_names: true),
      aggregate_id:       aggregate_id,
      aggregate_version:  event.position+1,
      event_name:         event.type
    }
  }
end

#get_events(*args) ⇒ Object 



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# File 'lib/sandthorn_driver_event_store/access/event_access.rb', line 34

def get_events(*args)
  query_builder = EventQuery.new(storage)
  query_builder.build(*args)
  wrap(query_builder.events)
end

#store_events(events = []) ⇒ Object

EventAccess

Reads and writes events.



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# File 'lib/sandthorn_driver_event_store/access/event_access.rb', line 6

def store_events(events = [])
  events = Utilities.array_wrap(events)
  timestamp = Time.now.utc
  stream_name = events.first[:aggregate_type].to_s + "-" +events.first[:aggregate_id]

  event_store_events = events.map do |event|
    build_event_data(timestamp, event)
  end

  if event_store_events.any?
    expected_version = event_store_events.first[:position] > 0 ? event_store_events.first[:position]-1 : nil
    storage.append_to_stream(stream_name, event_store_events, expected_version)
  end
end