Amazon ElastiCache Decommission Cache Cluster

arazzo: 1.0.1
info:
  title: Amazon ElastiCache Decommission Cache Cluster
  summary: Snapshot and delete a cache cluster, then poll until it is fully removed.
  description: >-
    Safely retires an Amazon ElastiCache cache cluster while preserving its data
    in a final snapshot. The workflow first describes the cluster to confirm it
    exists, submits a DeleteCacheCluster request that names a
    FinalSnapshotIdentifier so the data is captured before teardown, and then
    polls DescribeCacheClusters to confirm the cluster has finished deleting.
    Every step spells out its request inline so the flow can be read and executed
    without opening the underlying OpenAPI description. Requests use the AWS query
    (x-www-form-urlencoded) protocol with the Action and Version query parameters
    that the ElastiCache API requires.
  version: 1.0.0
sourceDescriptions:
- name: elastiCacheApi
  url: ../openapi/amazon-elasticache-openapi.yml
  type: openapi
workflows:
- workflowId: decommission-cache-cluster
  summary: Take a final snapshot, delete a cache cluster, and confirm removal.
  description: >-
    Confirms a cluster exists, deletes it while capturing a final snapshot, and
    polls DescribeCacheClusters until the cluster reports it is deleting or has
    been removed.
  inputs:
    type: object
    required:
    - CacheClusterId
    - FinalSnapshotIdentifier
    properties:
      CacheClusterId:
        type: string
        description: The identifier of the cluster to delete.
      FinalSnapshotIdentifier:
        type: string
        description: The name to give the final snapshot taken before deletion.
  steps:
  - stepId: verifyCluster
    description: >-
      Describe the cluster to confirm it exists before deleting it. The
      CacheClusterId query parameter scopes the description to the single target
      cluster.
    operationId: describeCacheClusters
    parameters:
    - name: Action
      in: query
      value: DescribeCacheClusters
    - name: Version
      in: query
      value: '2015-02-02'
    - name: CacheClusterId
      in: query
      value: $inputs.CacheClusterId
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      currentStatus: $response.body#/CacheClusters/0/CacheClusterStatus
  - stepId: deleteCluster
    description: >-
      Submit a DeleteCacheCluster request that names a FinalSnapshotIdentifier so
      a final snapshot is captured before the cluster is torn down. The cluster
      identifier and snapshot name travel in the form-encoded body.
    operationId: deleteCacheCluster
    parameters:
    - name: Action
      in: query
      value: DeleteCacheCluster
    - name: Version
      in: query
      value: '2015-02-02'
    requestBody:
      contentType: application/x-www-form-urlencoded
      payload:
        CacheClusterId: $inputs.CacheClusterId
        FinalSnapshotIdentifier: $inputs.FinalSnapshotIdentifier
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      deletedClusterId: $inputs.CacheClusterId
  - stepId: pollDeletion
    description: >-
      Describe the cluster again to confirm the deletion is in progress or
      complete. The CacheClusterId query parameter scopes the description to the
      cluster being removed.
    operationId: describeCacheClusters
    parameters:
    - name: Action
      in: query
      value: DescribeCacheClusters
    - name: Version
      in: query
      value: '2015-02-02'
    - name: CacheClusterId
      in: query
      value: $steps.deleteCluster.outputs.deletedClusterId
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      remainingClusters: $response.body#/CacheClusters
  outputs:
    deletedClusterId: $steps.deleteCluster.outputs.deletedClusterId
    remainingClusters: $steps.pollDeletion.outputs.remainingClusters