schema_version: 1
elements:
  ingest:
    type: backend
    label: Ingest API
    sublabel: HTTPS in, events out
    description: Accepts events from systems that cannot publish to the bus themselves.
  bus:
    type: messagebus
    label: Event bus
    sublabel: Kafka
    brand: apache-kafka
    description: One topic per event type; retained for seven days.
  router:
    type: backend
    label: Event router
    sublabel: validate, enrich, dispatch
    description: Checks each event against its schema, adds reference data, hands it to the consumers.
    diagram: 0300-components/router.archify
  dlq:
    type: messagebus
    label: Dead-letter queue
    sublabel: failed events
    description: Events the router could not process; replayed by operations.
  store:
    type: database
    label: Event store
    sublabel: PostgreSQL
    brand: postgresql
    description: Every accepted event, for audit and replay.
  notifier:
    type: backend
    label: Notifier
    sublabel: email, chat
    description: Turns selected events into messages to people.
  analytics:
    type: database
    label: Analytics
    sublabel: warehouse tables
    description: Flattened events for reporting.