Amazon GameLift Queue-Based Game Session Placement

arazzo: 1.0.1
info:
  title: Amazon GameLift Queue-Based Game Session Placement
  summary: Create a game session queue, start a placement on it, and poll until the placement is FULFILLED.
  description: >-
    Game session queues let Amazon GameLift place new sessions across multiple
    fleets and Regions for the best player experience. This workflow creates a
    queue with a list of fleet/alias destinations, starts an asynchronous game
    session placement request against the queue, and polls the placement until
    it reaches FULFILLED status (or branches on a CANCELLED/TIMED_OUT/FAILED
    outcome). Each step spells out its AWS JSON protocol request inline,
    including the X-Amz-Target header, so the flow can be read and executed
    without opening the underlying OpenAPI description.
  version: 1.0.0
sourceDescriptions:
- name: gameLiftApi
  url: ../openapi/amazon-gamelift-openapi.yaml
  type: openapi
workflows:
- workflowId: queue-placement
  summary: Create a queue, start a placement, and poll until FULFILLED.
  description: >-
    Creates a game session queue with destinations, starts a game session
    placement against it, and repeatedly describes the placement until it is
    FULFILLED or terminates in a non-pending state.
  inputs:
    type: object
    required:
    - queueName
    - destinations
    - placementId
    - maximumPlayerSessionCount
    properties:
      queueName:
        type: string
        description: A descriptive label for the queue, unique within the Region.
      timeoutInSeconds:
        type: integer
        description: Maximum time a placement request can remain in the queue before timing out.
      destinations:
        type: array
        description: Ordered list of fleet/alias ARN destinations the queue can place sessions into.
        items:
          type: object
      placementId:
        type: string
        description: A developer-defined unique identifier for the placement request.
      maximumPlayerSessionCount:
        type: integer
        description: Maximum number of players that can connect to the placed game session.
      gameSessionName:
        type: string
        description: Optional descriptive label for the placed game session.
  steps:
  - stepId: createQueue
    description: >-
      Create a game session queue with the supplied ordered list of fleet/alias
      destinations.
    operationId: CreateGameSessionQueue
    parameters:
    - name: X-Amz-Target
      in: header
      value: GameLift.CreateGameSessionQueue
    requestBody:
      contentType: application/x-amz-json-1.1
      payload:
        Name: $inputs.queueName
        TimeoutInSeconds: $inputs.timeoutInSeconds
        Destinations: $inputs.destinations
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      queueName: $response.body#/GameSessionQueue/Name
      queueArn: $response.body#/GameSessionQueue/GameSessionQueueArn
  - stepId: startPlacement
    description: >-
      Start an asynchronous game session placement against the new queue. The
      placement begins in PENDING status.
    operationId: StartGameSessionPlacement
    parameters:
    - name: X-Amz-Target
      in: header
      value: GameLift.StartGameSessionPlacement
    requestBody:
      contentType: application/x-amz-json-1.1
      payload:
        PlacementId: $inputs.placementId
        GameSessionQueueName: $steps.createQueue.outputs.queueName
        MaximumPlayerSessionCount: $inputs.maximumPlayerSessionCount
        GameSessionName: $inputs.gameSessionName
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      placementId: $response.body#/GameSessionPlacement/PlacementId
      placementStatus: $response.body#/GameSessionPlacement/Status
  - stepId: pollPlacement
    description: >-
      Describe the placement and check its status. Repeat while PENDING; finish
      once the placement is FULFILLED, or branch to the terminal step on a
      CANCELLED, TIMED_OUT, or FAILED outcome.
    operationId: DescribeGameSessionPlacement
    parameters:
    - name: X-Amz-Target
      in: header
      value: GameLift.DescribeGameSessionPlacement
    requestBody:
      contentType: application/x-amz-json-1.1
      payload:
        PlacementId: $steps.startPlacement.outputs.placementId
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      currentStatus: $response.body#/GameSessionPlacement/Status
      gameSessionArn: $response.body#/GameSessionPlacement/GameSessionArn
    onSuccess:
    - name: placementFulfilled
      type: end
      criteria:
      - context: $response.body
        condition: $.GameSessionPlacement.Status == "FULFILLED"
        type: jsonpath
    - name: placementPending
      type: goto
      stepId: pollPlacement
      criteria:
      - context: $response.body
        condition: $.GameSessionPlacement.Status == "PENDING"
        type: jsonpath
  outputs:
    queueArn: $steps.createQueue.outputs.queueArn
    placementId: $steps.startPlacement.outputs.placementId
    gameSessionArn: $steps.pollPlacement.outputs.gameSessionArn
    placementStatus: $steps.pollPlacement.outputs.currentStatus