Container for the parameters to the PollForDecisionTask operation.
Used by deciders to get a DecisionTask from the specified decision
A decision task may be returned for any open workflow execution that is using the
specified task list. The task includes a paginated view of the history of the workflow
execution. The decider should use the workflow type and the history to determine how
to properly handle the task.
This action initiates a long poll, where the service holds the HTTP connection open and responds as soon a task becomes available. If no decision task is available in the specified task list before the timeout of 60 seconds expires, an empty result is returned. An empty result, in this context, means that a DecisionTask is returned, but that the value of taskToken is an empty string.
Deciders should set their client side socket timeout to at least 70 seconds (10 seconds higher than the timeout).
Because the number of workflow history events for a single workflow execution might
be very large, the result returned might be split up across a number of pages. To
retrieve subsequent pages, make additional calls to
nextPageToken returned by the initial call. Note that you do
GetWorkflowExecutionHistory with this
You can use IAM policies to control this action's access to Amazon SWF resources as follows:
Resource element with the domain name to limit the action to only
Action element to allow or deny permission to call this action.
taskList.name parameter by using a
element with the
swf:taskList.name key to allow the action to access
only certain task lists.
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
cause parameter is set to
For details and example IAM policies, see Using
IAM to Manage Access to Amazon SWF Workflows in the Amazon SWF Developer Guide.
public class PollForDecisionTaskRequest : AmazonSimpleWorkflowRequest IAmazonWebServiceRequest
The PollForDecisionTaskRequest type exposes the following members
Gets and sets the property Domain.
The name of the domain containing the task lists to poll.
Gets and sets the property Identity.
Identity of the decider making the request, which is recorded in the DecisionTaskStarted event in the workflow history. This enables diagnostic tracing when problems arise. The form of this identity is user defined.
Gets and sets the property MaximumPageSize.
The maximum number of results that are returned per call.
This is an upper limit only; the actual number of results returned per call may be fewer than the specified maximum.
Gets and sets the property NextPageToken.
Gets and sets the property ReverseOrder.
When set to
Gets and sets the property TaskList.
Specifies the task list to poll for decision tasks.
The specified string must not start or end with whitespace. It must not contain a
Supported in: 1.3
Supported in: 4.5, 4.0, 3.5
Supported in: Windows Store Apps
Supported in: Windows Phone 8.1
Supported in: Xamarin Android
Supported in: Xamarin iOS (Unified)
Supported in: Xamarin.Forms