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taskList. 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.
nextPageTokenreturned by the initial call. Note that you do not call
nextPageToken. Instead, call
You can use IAM policies to control this action's access to Amazon SWF resources as follows:
Resourceelement with the domain name to limit the action to only specified domains.
Actionelement to allow or deny permission to call this action.
taskList.nameparameter by using a Condition element with the
swf:taskList.namekey to allow the action to access only certain task lists.
If the caller does not 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 will be set to OPERATION_NOT_PERMITTED. For details and example IAM policies, see Using IAM to Manage Access to Amazon SWF Workflows.
Version: (assembly version)
public abstract PollForDecisionTaskResponse PollForDecisionTask( PollForDecisionTaskRequest request )
Container for the necessary parameters to execute the PollForDecisionTask service method.
|LimitExceededException||Returned by any operation if a system imposed limitation has been reached. To address this fault you should either clean up unused resources or increase the limit by contacting AWS.|
|OperationNotPermittedException||Returned when the caller does not have sufficient permissions to invoke the action.|
|UnknownResourceException||Returned when the named resource cannot be found with in the scope of this operation (region or domain). This could happen if the named resource was never created or is no longer available for this operation.|
Supported in: 4.5, 4.0, 3.5