Class: Igniter::Store::Protocol::Handlers::ProjectionHandler

Inherits:
Object
  • Object
show all
Defined in:
lib/igniter/store/protocol/handlers/projection_handler.rb

Instance Method Summary collapse

Constructor Details

#initialize(store) ⇒ ProjectionHandler

Returns a new instance of ProjectionHandler.



8
 
# File 'lib/igniter/store/protocol/handlers/projection_handler.rb', line 8

def initialize(store) = @store = store

Instance Method Details

#call(descriptor) ⇒ Object 



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# File 'lib/igniter/store/protocol/handlers/projection_handler.rb', line 10

def call(descriptor)
  return Receipt.rejection("Missing required fields: name", kind: :projection) if descriptor[:name].nil?
  if descriptor[:reads].nil? && descriptor[:source].nil?
    return Receipt.rejection("Missing required fields: reads or source", kind: :projection)
  end

  name    = descriptor[:name].to_sym
  source  = descriptor[:source]
  reads   = descriptor[:reads] || source
  reads   = Array(reads).map(&:to_sym)
  relations = Array(descriptor[:relations]).map(&:to_sym)
  consumer_hint = (descriptor[:consumer_hint] || :protocol_client).to_sym
  mode    = descriptor.fetch(:mode, :on_demand)
  reactive = descriptor.key?(:reactive) ? !!descriptor[:reactive] : mode == :materialized

  @store.register_projection(
    ProjectionPath.new(
      name:          name,
      reads:         reads,
      relations:     relations,
      consumer_hint: consumer_hint,
      reactive:      reactive
    )
  )

  Receipt.accepted(kind: :projection, name: name)
end