arazzo: 1.0.1
info:
  title: Amazon DynamoDB Transactional Write Then Transactional Read
  summary: Atomically write a group of items, then atomically read them back.
  description: >-
    Commits a set of changes atomically with TransactWriteItems and then
    reads the affected items back atomically with TransactGetItems to verify
    the committed state. A client request token makes the write idempotent.
    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: dynamodbApi
  url: ../openapi/amazon-dynamodb-openapi.yml
  type: openapi
workflows:
- workflowId: transaction-write-then-read
  summary: Run a write transaction, then confirm it with a read transaction.
  description: >-
    Submits a TransactWriteItems request with the supplied actions and an
    idempotency token, then issues a TransactGetItems request to read the
    affected items in a single atomic operation.
  inputs:
    type: object
    required:
    - writeTransactItems
    - getTransactItems
    properties:
      writeTransactItems:
        type: array
        description: >-
          The ordered TransactItems for the write (ConditionCheck, Put,
          Delete, and Update actions).
        items:
          type: object
      clientRequestToken:
        type: string
        description: A unique token making the write transaction idempotent.
      getTransactItems:
        type: array
        description: The ordered TransactItems for the read (Get actions).
        items:
          type: object
  steps:
  - stepId: writeTransaction
    description: >-
      Atomically apply the write transaction. All actions succeed together
      or the entire transaction is rolled back.
    operationId: transactWriteItems
    parameters:
    - name: X-Amz-Target
      in: header
      value: DynamoDB_20120810.TransactWriteItems
    requestBody:
      contentType: application/x-amz-json-1.0
      payload:
        TransactItems: $inputs.writeTransactItems
        ClientRequestToken: $inputs.clientRequestToken
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      itemCollectionMetrics: $response.body#/ItemCollectionMetrics
  - stepId: readTransaction
    description: >-
      Atomically read the affected items back to confirm the transaction's
      committed state.
    operationId: transactGetItems
    parameters:
    - name: X-Amz-Target
      in: header
      value: DynamoDB_20120810.TransactGetItems
    requestBody:
      contentType: application/x-amz-json-1.0
      payload:
        TransactItems: $inputs.getTransactItems
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      responses: $response.body#/Responses
  outputs:
    responses: $steps.readTransaction.outputs.responses