Table Of Contents


User Guide

First time using the AWS CLI? See the User Guide for help getting started.

[ aws . swf ]



Used by activity workers to report to the service that the ActivityTask represented by the specified taskToken is still making progress. The worker can also specify details of the progress, for example percent complete, using the details parameter. This action can also be used by the worker as a mechanism to check if cancellation is being requested for the activity task. If a cancellation is being attempted for the specified task, then the boolean cancelRequested flag returned by the service is set to true .

This action resets the taskHeartbeatTimeout clock. The taskHeartbeatTimeout is specified in register-activity-type .

This action doesn't in itself create an event in the workflow execution history. However, if the task times out, the workflow execution history contains a ActivityTaskTimedOut event that contains the information from the last heartbeat generated by the activity worker.


The taskStartToCloseTimeout of an activity type is the maximum duration of an activity task, regardless of the number of record-activity-task-heartbeat requests received. The taskStartToCloseTimeout is also specified in register-activity-type .


This operation is only useful for long-lived activities to report liveliness of the task and to determine if a cancellation is being attempted.


If the cancelRequested flag returns true , a cancellation is being attempted. If the worker can cancel the activity, it should respond with respond-activity-task-canceled . Otherwise, it should ignore the cancellation request.

Access Control

You can use IAM policies to control this action's access to Amazon SWF resources as follows:

  • Use a Resource element with the domain name to limit the action to only specified domains.
  • Use an Action element to allow or deny permission to call this action.
  • You cannot use an IAM policy to constrain this action's parameters.

If the caller doesn't have sufficient permissions to invoke the action, or the parameter values fall outside the specified constraints, the action fails. The associated event attribute's cause parameter is set to OPERATION_NOT_PERMITTED . For details and example IAM policies, see Using IAM to Manage Access to Amazon SWF Workflows in the Amazon SWF Developer Guide .

See also: AWS API Documentation


--task-token <value>
[--details <value>]
[--cli-input-json <value>]
[--generate-cli-skeleton <value>]


--task-token (string)

The taskToken of the ActivityTask .


taskToken is generated by the service and should be treated as an opaque value. If the task is passed to another process, its taskToken must also be passed. This enables it to provide its progress and respond with results.

--details (string)

If specified, contains details about the progress of the task.

--cli-input-json (string) Performs service operation based on the JSON string provided. The JSON string follows the format provided by --generate-cli-skeleton. If other arguments are provided on the command line, the CLI values will override the JSON-provided values.

--generate-cli-skeleton (string) Prints a JSON skeleton to standard output without sending an API request. If provided with no value or the value input, prints a sample input JSON that can be used as an argument for --cli-input-json. If provided with the value output, it validates the command inputs and returns a sample output JSON for that command.


cancelRequested -> (boolean)

Set to true if cancellation of the task is requested.