openapi: 3.1.0
info:
  title: 'Amazon Step Functions Executions #X Amz Target=AWSStepFunctions.GetActivityTask API'
  description: Amazon Step Functions is a serverless workflow orchestration service that lets you coordinate distributed applications and microservices using visual workflows. This API enables you to create and manage state machines, start and monitor executions, and retrieve execution history.
  version: '2016-11-23'
  contact:
    name: Amazon Web Services
    url: https://aws.amazon.com/contact-us/
  termsOfService: https://aws.amazon.com/service-terms/
servers:
- url: https://states.{region}.amazonaws.com
  description: Amazon Step Functions Regional Endpoint
  variables:
    region:
      default: us-east-1
      description: AWS Region
security:
- sigv4Auth: []
tags:
- name: '#X Amz Target=AWSStepFunctions.GetActivityTask'
paths:
  /#X-Amz-Target=AWSStepFunctions.GetActivityTask:
    parameters:
    - $ref: '#/components/parameters/X-Amz-Content-Sha256'
    - $ref: '#/components/parameters/X-Amz-Date'
    - $ref: '#/components/parameters/X-Amz-Algorithm'
    - $ref: '#/components/parameters/X-Amz-Credential'
    - $ref: '#/components/parameters/X-Amz-Security-Token'
    - $ref: '#/components/parameters/X-Amz-Signature'
    - $ref: '#/components/parameters/X-Amz-SignedHeaders'
    post:
      operationId: GetActivityTask
      description: <p>Used by workers to retrieve a task (with the specified activity ARN) which has been scheduled for execution by a running state machine. This initiates a long poll, where the service holds the HTTP connection open and responds as soon as a task becomes available (i.e. an execution of a task of this type is needed.) The maximum time the service holds on to the request before responding is 60 seconds. If no task is available within 60 seconds, the poll returns a <code>taskToken</code> with a null string.</p> <note> <p>This API action isn't logged in CloudTrail.</p> </note> <important> <p>Workers should set their client side socket timeout to at least 65 seconds (5 seconds higher than the maximum time the service may hold the poll request).</p> <p>Polling with <code>GetActivityTask</code> can cause latency in some implementations. See <a href="https://docs.aws.amazon.com/step-functions/latest/dg/bp-activity-pollers.html">Avoid Latency When Polling for Activity Tasks</a> in the Step Functions Developer Guide.</p> </important>
      responses:
        '200':
          description: Success
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/GetActivityTaskOutput'
              examples:
                GetActivityTask200Example:
                  summary: Default GetActivityTask 200
                  x-microcks-default: true
                  value:
                    taskToken: example-value
                    input: example-value
        '480':
          description: ActivityDoesNotExist
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ActivityDoesNotExist'
              examples:
                GetActivityTask480Example:
                  summary: Default GetActivityTask 480
                  x-microcks-default: true
                  value: example-value
        '481':
          description: ActivityWorkerLimitExceeded
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ActivityWorkerLimitExceeded'
              examples:
                GetActivityTask481Example:
                  summary: Default GetActivityTask 481
                  x-microcks-default: true
                  value: example-value
        '482':
          description: InvalidArn
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/InvalidArn'
              examples:
                GetActivityTask482Example:
                  summary: Default GetActivityTask 482
                  x-microcks-default: true
                  value: example-value
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/GetActivityTaskInput'
            examples:
              GetActivityTaskRequestExample:
                summary: Default GetActivityTask request
                x-microcks-default: true
                value:
                  activityArn: arn:aws:service:us-east-1:123456789012:resource/example
                  workerName: MyResource
      parameters:
      - name: X-Amz-Target
        in: header
        required: true
        schema:
          type: string
          enum:
          - AWSStepFunctions.GetActivityTask
      summary: Amazon Get Activity Task
      x-microcks-operation:
        delay: 0
        dispatcher: FALLBACK
      tags:
      - '#X Amz Target=AWSStepFunctions.GetActivityTask'
components:
  parameters:
    X-Amz-Signature:
      name: X-Amz-Signature
      in: header
      schema:
        type: string
      required: false
    X-Amz-Algorithm:
      name: X-Amz-Algorithm
      in: header
      schema:
        type: string
      required: false
    X-Amz-Security-Token:
      name: X-Amz-Security-Token
      in: header
      schema:
        type: string
      required: false
    X-Amz-Content-Sha256:
      name: X-Amz-Content-Sha256
      in: header
      schema:
        type: string
      required: false
    X-Amz-SignedHeaders:
      name: X-Amz-SignedHeaders
      in: header
      schema:
        type: string
      required: false
    X-Amz-Date:
      name: X-Amz-Date
      in: header
      schema:
        type: string
      required: false
    X-Amz-Credential:
      name: X-Amz-Credential
      in: header
      schema:
        type: string
      required: false
  schemas:
    ActivityDoesNotExist: {}
    Arn:
      type: string
      minLength: 1
      maxLength: 256
    InvalidArn: {}
    SensitiveDataJobInput:
      type: string
      maxLength: 262144
      format: password
    GetActivityTaskOutput:
      type: object
      properties:
        taskToken:
          allOf:
          - $ref: '#/components/schemas/TaskToken'
          - description: A token that identifies the scheduled task. This token must be copied and included in subsequent calls to <a>SendTaskHeartbeat</a>, <a>SendTaskSuccess</a> or <a>SendTaskFailure</a> in order to report the progress or completion of the task.
        input:
          allOf:
          - $ref: '#/components/schemas/SensitiveDataJobInput'
          - description: The string that contains the JSON input data for the task. Length constraints apply to the payload size, and are expressed as bytes in UTF-8 encoding.
    GetActivityTaskInput:
      type: object
      required:
      - activityArn
      title: GetActivityTaskInput
      properties:
        activityArn:
          allOf:
          - $ref: '#/components/schemas/Arn'
          - description: The Amazon Resource Name (ARN) of the activity to retrieve tasks from (assigned when you create the task using <a>CreateActivity</a>.)
        workerName:
          allOf:
          - $ref: '#/components/schemas/Name'
          - description: You can provide an arbitrary name in order to identify the worker that the task is assigned to. This name is used when it is logged in the execution history.
    TaskToken:
      type: string
      minLength: 1
      maxLength: 1024
    Name:
      type: string
      minLength: 1
      maxLength: 80
    ActivityWorkerLimitExceeded: {}
  securitySchemes:
    sigv4Auth:
      type: apiKey
      name: Authorization
      in: header
      description: AWS Signature Version 4 authentication
externalDocs:
  description: Amazon Step Functions API Reference
  url: https://docs.aws.amazon.com/step-functions/latest/apireference/