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taskList
.
This initiates a long poll, where the service holds the HTTP connection open and responds
as soon as a task becomes available. 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 will return an empty result. An empty result, in this context, means that
an ActivityTask is returned, but that the value of taskToken is an empty string. If
a task is returned, the worker should use its type to identify and process it correctly.
Access Control
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 specified domains.Action
element to allow or
deny permission to call this action.taskList.name
parameter by using a Condition element with the swf:taskList.name
key 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.
Namespace: Amazon.SimpleWorkflow
Assembly: AWSSDK.dll
Version: (assembly version)
public virtual PollForActivityTaskResponse PollForActivityTask( PollForActivityTaskRequest request )
Container for the necessary parameters to execute the PollForActivityTask service method.
Exception | Condition |
---|---|
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. |
.NET Framework:
Supported in: 4.5, 4.0, 3.5