Amazon DynamoDB Drain and Delete a Table

arazzo: 1.0.1
info:
  title: Amazon DynamoDB Drain and Delete a Table
  summary: Scan a table, batch-delete its items, then drop the table.
  description: >-
    Tears down a table cleanly. The workflow scans the table to gather the
    keys of the items it holds, issues a BatchWriteItem with delete requests
    to empty it, and then calls DeleteTable to remove the table itself. The
    DeleteTable response reports the DELETING status. Every step spells out
    its request inline, including the AWS JSON protocol X-Amz-Target header,
    so the flow can be read and executed without opening the underlying
    OpenAPI description.
  version: 1.0.0
sourceDescriptions:
- name: batchApi
  url: ../openapi/amazon-dynamodb-batch-api-openapi.yml
  type: openapi
- name: queriesApi
  url: ../openapi/amazon-dynamodb-queries-api-openapi.yml
  type: openapi
- name: tablesApi
  url: ../openapi/amazon-dynamodb-tables-api-openapi.yml
  type: openapi
workflows:
- workflowId: drain-and-delete-table
  summary: Scan, batch-delete items, and then delete the table.
  description: >-
    Scans the table for the keys to remove, deletes them with
    BatchWriteItem, and finishes by calling DeleteTable.
  inputs:
    type: object
    required:
    - tableName
    - deleteRequestItems
    properties:
      tableName:
        type: string
        description: The name of the table to drain and delete.
      projectionExpression:
        type: string
        description: Projection expression limiting the scan to key attributes.
      deleteRequestItems:
        type: object
        description: >-
          The BatchWriteItem RequestItems map of table name to an array of
          DeleteRequest objects keyed by primary key.
  steps:
  - stepId: scanKeys
    description: >-
      Scan the table to collect the keys of the items that need to be
      removed before the table can be deleted.
    operationId: scan
    parameters:
    - name: X-Amz-Target
      in: header
      value: DynamoDB_20120810.Scan
    requestBody:
      contentType: application/x-amz-json-1.0
      payload:
        TableName: $inputs.tableName
        ProjectionExpression: $inputs.projectionExpression
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      items: $response.body#/Items
      count: $response.body#/Count
  - stepId: deleteItems
    description: Batch-delete the scanned items to empty the table.
    operationId: batchWriteItem
    parameters:
    - name: X-Amz-Target
      in: header
      value: DynamoDB_20120810.BatchWriteItem
    requestBody:
      contentType: application/x-amz-json-1.0
      payload:
        RequestItems: $inputs.deleteRequestItems
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      unprocessedItems: $response.body#/UnprocessedItems
  - stepId: deleteTable
    description: Delete the now-empty table; the response reports DELETING status.
    operationId: deleteTable
    parameters:
    - name: X-Amz-Target
      in: header
      value: DynamoDB_20120810.DeleteTable
    requestBody:
      contentType: application/x-amz-json-1.0
      payload:
        TableName: $inputs.tableName
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      tableStatus: $response.body#/Table/TableStatus
  outputs:
    tableStatus: $steps.deleteTable.outputs.tableStatus