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Task runners call PollForTask to receive a task to perform from AWS Data Pipeline.
The task runner specifies which tasks it can perform by setting a value for the workerGroup
parameter. The task returned can come from any of the pipelines that match the workerGroup
value passed in by the task runner and that was launched using the IAM user credentials
specified by the task runner.
If tasks are ready in the work queue, PollForTask returns a response immediately.
If no tasks are available in the queue, PollForTask uses long-polling and holds
on to a poll connection for up to a 90 seconds, during which time the first newly
scheduled task is handed to the task runner. To accomodate this, set the socket timeout
in your task runner to 90 seconds. The task runner should not call PollForTask
again on the same workerGroup until it receives a response, and this can take
up to 90 seconds.
This is an asynchronous operation using the standard naming convention for .NET 4.5 or higher. For .NET 3.5 the operation is implemented as a pair of methods using the standard naming convention of BeginPollForTask and EndPollForTask.
Namespace: Amazon.DataPipeline
Assembly: AWSSDK.DataPipeline.dll
Version: 3.x.y.z
public virtual Task<PollForTaskResponse> PollForTaskAsync( PollForTaskRequest request, CancellationToken cancellationToken )
Container for the necessary parameters to execute the PollForTask service method.
A cancellation token that can be used by other objects or threads to receive notice of cancellation.
| Exception | Condition |
|---|---|
| InternalServiceErrorException | An internal service error occurred. |
| InvalidRequestException | The request was not valid. Verify that your request was properly formatted, that the signature was generated with the correct credentials, and that you haven't exceeded any of the service limits for your account. |
| TaskNotFoundException | The specified task was not found. |
.NET Core App:
Supported in: 3.1
.NET Standard:
Supported in: 2.0
.NET Framework:
Supported in: 4.5