Class: Upkeep::Subscriptions::LayeredReverseIndex

Inherits:
Object
  • Object
show all
Defined in:
lib/upkeep/subscriptions/layered_reverse_index.rb

Constant Summary collapse

LOOKUP_NOTIFICATION = 
"lookup_subscription_index.upkeep"

Instance Method Summary collapse

Constructor Details

#initialize(active_index:, persistent_index:, persistent_count:, store:, pending_index: nil) ⇒ LayeredReverseIndex

Returns a new instance of LayeredReverseIndex.



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# File 'lib/upkeep/subscriptions/layered_reverse_index.rb', line 10

def initialize(active_index:, persistent_index:, persistent_count:, store:, pending_index: nil)
  @active_index = active_index
  @persistent_index = persistent_index
  @persistent_count = persistent_count
  @store = store
  @pending_index = pending_index
end

Instance Method Details

#entries_for(changes) ⇒ Object 



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# File 'lib/upkeep/subscriptions/layered_reverse_index.rb', line 18

def entries_for(changes)
  if ActiveSupport::Notifications.notifier.listening?(LOOKUP_NOTIFICATION)
    payload = { changes: Array(changes).size, store: store }
    ActiveSupport::Notifications.instrument(LOOKUP_NOTIFICATION, payload) do
      entries_for_with_payload(changes, payload)
    end
  else
    entries_for_without_payload(changes)
  end
end

#entries_for_with_payload(changes, payload) ⇒ Object 



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# File 'lib/upkeep/subscriptions/layered_reverse_index.rb', line 37

def entries_for_with_payload(changes, payload)
  active_entries = active_index.entries_for(changes)
  active_count = active_index.count
  pending_entries = pending_entries_for(changes)
  pending_count = pending_count_for_payload
  payload[:active_entries] = active_entries.size
  payload[:active_subscriptions] = active_count
  payload[:pending_entries] = pending_entries.size
  payload[:pending_subscriptions] = pending_count

  if active_count.zero?
    persistent_entries = persistent_index.entries_for(changes)
    payload[:mode] = persistent_entries.empty? && pending_entries.any? ? "pending_activation" : "persistent"
    payload[:persistent_entries] = persistent_entries.size
    apply_miss_reason(payload, active_entries: active_entries, persistent_entries: persistent_entries, pending_entries: pending_entries)
    return persistent_entries
  end

  if active_index.covers?(persistent_subscription_count)
    payload[:mode] = "active"
    payload[:persistent_entries] = 0
    apply_miss_reason(payload, active_entries: active_entries, persistent_entries: [], pending_entries: pending_entries)
    return active_entries
  end

  persistent_entries = persistent_index.entries_for(changes)
  payload[:mode] = "active_and_persistent"
  payload[:persistent_entries] = persistent_entries.size
  apply_miss_reason(payload, active_entries: active_entries, persistent_entries: persistent_entries, pending_entries: pending_entries)
  merge_entries(active_entries, persistent_entries)
end

#entries_for_without_payload(changes) ⇒ Object 



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# File 'lib/upkeep/subscriptions/layered_reverse_index.rb', line 29

def entries_for_without_payload(changes)
  active_entries = active_index.entries_for(changes)
  return persistent_index.entries_for(changes) if active_index.count.zero?
  return active_entries if active_index.covers?(persistent_subscription_count)

  merge_entries(active_entries, persistent_index.entries_for(changes))
end

#summary ⇒ Object 



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# File 'lib/upkeep/subscriptions/layered_reverse_index.rb', line 69

def summary
  persistent = persistent_index.summary
  active = active_index.summary
  pending = pending_index&.summary || { lookup_keys: 0, entries: 0, subscriptions: 0 }
  mode = active_index.covers?(persistent_subscription_count) ? :active : :active_and_persistent
  totals = if mode == :active
    active
  else
    {
      lookup_keys: active.fetch(:lookup_keys) + persistent.fetch(:lookup_keys),
      entries: active.fetch(:entries) + persistent.fetch(:entries)
    }
  end

  {
    lookup_keys: totals.fetch(:lookup_keys),
    entries: totals.fetch(:entries),
    mode: mode,
    active: active,
    pending: pending,
    persistent: persistent
  }
end