Paws::SimpleWorkflow::Decision
This class represents one of two things:
Use the attributes of this class as arguments to methods. You shouldn't make instances of this class. Each attribute should be used as a named argument in the calls that expect this type of object.
As an example, if Att1 is expected to be a Paws::SimpleWorkflow::Decision object:
$service_obj->Method(Att1 => { CancelTimerDecisionAttributes => $value, ..., StartTimerDecisionAttributes => $value });
Use accessors for each attribute. If Att1 is expected to be an Paws::SimpleWorkflow::Decision object:
$result = $service_obj->Method(...); $result->Att1->CancelTimerDecisionAttributes
Specifies a decision made by the decider. A decision can be one of these types:
CancelTimer – Cancels a previously started timer and records a TimerCanceled event in the history.
CancelTimer
TimerCanceled
CancelWorkflowExecution – Closes the workflow execution and records a WorkflowExecutionCanceled event in the history.
CancelWorkflowExecution
WorkflowExecutionCanceled
CompleteWorkflowExecution – Closes the workflow execution and records a WorkflowExecutionCompleted event in the history .
CompleteWorkflowExecution
WorkflowExecutionCompleted
ContinueAsNewWorkflowExecution – Closes the workflow execution and starts a new workflow execution of the same type using the same workflow ID and a unique run Id. A WorkflowExecutionContinuedAsNew event is recorded in the history.
ContinueAsNewWorkflowExecution
WorkflowExecutionContinuedAsNew
FailWorkflowExecution – Closes the workflow execution and records a WorkflowExecutionFailed event in the history.
FailWorkflowExecution
WorkflowExecutionFailed
RecordMarker – Records a MarkerRecorded event in the history. Markers can be used for adding custom information in the history for instance to let deciders know that they don't need to look at the history beyond the marker event.
RecordMarker
MarkerRecorded
RequestCancelActivityTask – Attempts to cancel a previously scheduled activity task. If the activity task was scheduled but has not been assigned to a worker, then it is canceled. If the activity task was already assigned to a worker, then the worker is informed that cancellation has been requested in the response to RecordActivityTaskHeartbeat.
RequestCancelActivityTask
RequestCancelExternalWorkflowExecution – Requests that a request be made to cancel the specified external workflow execution and records a RequestCancelExternalWorkflowExecutionInitiated event in the history.
RequestCancelExternalWorkflowExecution
RequestCancelExternalWorkflowExecutionInitiated
ScheduleActivityTask – Schedules an activity task.
ScheduleActivityTask
SignalExternalWorkflowExecution – Requests a signal to be delivered to the specified external workflow execution and records a SignalExternalWorkflowExecutionInitiated event in the history.
SignalExternalWorkflowExecution
SignalExternalWorkflowExecutionInitiated
StartChildWorkflowExecution – Requests that a child workflow execution be started and records a StartChildWorkflowExecutionInitiated event in the history. The child workflow execution is a separate workflow execution with its own history.
StartChildWorkflowExecution
StartChildWorkflowExecutionInitiated
StartTimer – Starts a timer for this workflow execution and records a TimerStarted event in the history. This timer fires after the specified delay and record a TimerFired event.
StartTimer
TimerStarted
TimerFired
Access Control
If you grant permission to use RespondDecisionTaskCompleted, you can use IAM policies to express permissions for the list of decisions returned by this action as if they were members of the API. Treating decisions as a pseudo API maintains a uniform conceptual model and helps keep policies readable. For details and example IAM policies, see Using IAM to Manage Access to Amazon SWF Workflows (https://docs.aws.amazon.com/amazonswf/latest/developerguide/swf-dev-iam.html) in the Amazon SWF Developer Guide.
RespondDecisionTaskCompleted
Decision Failure
Decisions can fail for several reasons
The ordering of decisions should follow a logical flow. Some decisions might not make sense in the current context of the workflow execution and therefore fails.
A limit on your account was reached.
The decision lacks sufficient permissions.
One of the following events might be added to the history to indicate an error. The event attribute's cause parameter indicates the cause. If cause is set to OPERATION_NOT_PERMITTED, the decision failed because it lacked sufficient permissions. For details and example IAM policies, see Using IAM to Manage Access to Amazon SWF Workflows (https://docs.aws.amazon.com/amazonswf/latest/developerguide/swf-dev-iam.html) in the Amazon SWF Developer Guide.
cause
OPERATION_NOT_PERMITTED
ScheduleActivityTaskFailed – A ScheduleActivityTask decision failed. This could happen if the activity type specified in the decision isn't registered, is in a deprecated state, or the decision isn't properly configured.
ScheduleActivityTaskFailed
RequestCancelActivityTaskFailed – A RequestCancelActivityTask decision failed. This could happen if there is no open activity task with the specified activityId.
RequestCancelActivityTaskFailed
StartTimerFailed – A StartTimer decision failed. This could happen if there is another open timer with the same timerId.
StartTimerFailed
CancelTimerFailed – A CancelTimer decision failed. This could happen if there is no open timer with the specified timerId.
CancelTimerFailed
StartChildWorkflowExecutionFailed – A StartChildWorkflowExecution decision failed. This could happen if the workflow type specified isn't registered, is deprecated, or the decision isn't properly configured.
StartChildWorkflowExecutionFailed
SignalExternalWorkflowExecutionFailed – A SignalExternalWorkflowExecution decision failed. This could happen if the workflowID specified in the decision was incorrect.
SignalExternalWorkflowExecutionFailed
workflowID
RequestCancelExternalWorkflowExecutionFailed – A RequestCancelExternalWorkflowExecution decision failed. This could happen if the workflowID specified in the decision was incorrect.
RequestCancelExternalWorkflowExecutionFailed
CancelWorkflowExecutionFailed – A CancelWorkflowExecution decision failed. This could happen if there is an unhandled decision task pending in the workflow execution.
CancelWorkflowExecutionFailed
CompleteWorkflowExecutionFailed – A CompleteWorkflowExecution decision failed. This could happen if there is an unhandled decision task pending in the workflow execution.
CompleteWorkflowExecutionFailed
ContinueAsNewWorkflowExecutionFailed – A ContinueAsNewWorkflowExecution decision failed. This could happen if there is an unhandled decision task pending in the workflow execution or the ContinueAsNewWorkflowExecution decision was not configured correctly.
ContinueAsNewWorkflowExecutionFailed
FailWorkflowExecutionFailed – A FailWorkflowExecution decision failed. This could happen if there is an unhandled decision task pending in the workflow execution.
FailWorkflowExecutionFailed
The preceding error events might occur due to an error in the decider logic, which might put the workflow execution in an unstable state The cause field in the event structure for the error event indicates the cause of the error.
A workflow execution may be closed by the decider by returning one of the following decisions when completing a decision task: CompleteWorkflowExecution, FailWorkflowExecution, CancelWorkflowExecution and ContinueAsNewWorkflowExecution. An UnhandledDecision fault is returned if a workflow closing decision is specified and a signal or activity event had been added to the history while the decision task was being performed by the decider. Unlike the above situations which are logic issues, this fault is always possible because of race conditions in a distributed system. The right action here is to call RespondDecisionTaskCompleted without any decisions. This would result in another decision task with these new events included in the history. The decider should handle the new events and may decide to close the workflow execution.
UnhandledDecision
How to Code a Decision
You code a decision by first setting the decision type field to one of the above decision values, and then set the corresponding attributes field shown below:
ScheduleActivityTaskDecisionAttributes
RequestCancelActivityTaskDecisionAttributes
CompleteWorkflowExecutionDecisionAttributes
FailWorkflowExecutionDecisionAttributes
CancelWorkflowExecutionDecisionAttributes
ContinueAsNewWorkflowExecutionDecisionAttributes
RecordMarkerDecisionAttributes
StartTimerDecisionAttributes
CancelTimerDecisionAttributes
SignalExternalWorkflowExecutionDecisionAttributes
RequestCancelExternalWorkflowExecutionDecisionAttributes
StartChildWorkflowExecutionDecisionAttributes
Provides the details of the CancelTimer decision. It isn't set for other decision types.
Provides the details of the CancelWorkflowExecution decision. It isn't set for other decision types.
Provides the details of the CompleteWorkflowExecution decision. It isn't set for other decision types.
Provides the details of the ContinueAsNewWorkflowExecution decision. It isn't set for other decision types.
Specifies the type of the decision.
Provides the details of the FailWorkflowExecution decision. It isn't set for other decision types.
Provides the details of the RecordMarker decision. It isn't set for other decision types.
Provides the details of the RequestCancelActivityTask decision. It isn't set for other decision types.
Provides the details of the RequestCancelExternalWorkflowExecution decision. It isn't set for other decision types.
Provides the details of the ScheduleActivityTask decision. It isn't set for other decision types.
Provides the details of the ScheduleLambdaFunction decision. It isn't set for other decision types.
ScheduleLambdaFunction
Provides the details of the SignalExternalWorkflowExecution decision. It isn't set for other decision types.
Provides the details of the StartChildWorkflowExecution decision. It isn't set for other decision types.
Provides the details of the StartTimer decision. It isn't set for other decision types.
This class forms part of Paws, describing an object used in Paws::SimpleWorkflow
The source code is located here: https://github.com/pplu/aws-sdk-perl
Please report bugs to: https://github.com/pplu/aws-sdk-perl/issues
To install Paws, copy and paste the appropriate command in to your terminal.
cpanm
cpanm Paws
CPAN shell
perl -MCPAN -e shell install Paws
For more information on module installation, please visit the detailed CPAN module installation guide.