class TaskStateBase

Language	Type name
.NET	Amazon.CDK.AWS.StepFunctions.TaskStateBase
Java	software.amazon.awscdk.services.stepfunctions.TaskStateBase
Python	aws_cdk.aws_stepfunctions.TaskStateBase
TypeScript (source)	@aws-cdk/aws-stepfunctions » TaskStateBase

Implements IConstruct, IConstruct, IDependable, IChainable, INextable

Extends State

Implemented by AthenaGetQueryExecution, AthenaGetQueryResults, AthenaStartQueryExecution, AthenaStopQueryExecution, BatchSubmitJob, CallApiGatewayHttpApiEndpoint, CallApiGatewayRestApiEndpoint, CallAwsService, CodeBuildStartBuild, DynamoDeleteItem, DynamoGetItem, DynamoPutItem, DynamoUpdateItem, EcsRunTask, EksCall, EmrAddStep, EmrCancelStep, EmrContainersCreateVirtualCluster, EmrContainersDeleteVirtualCluster, EmrContainersStartJobRun, EmrCreateCluster, EmrModifyInstanceFleetByName, EmrModifyInstanceGroupByName, EmrSetClusterTerminationProtection, EmrTerminateCluster, EvaluateExpression, EventBridgePutEvents, GlueDataBrewStartJobRun, GlueStartJobRun, LambdaInvoke, SageMakerCreateEndpoint, SageMakerCreateEndpointConfig, SageMakerCreateModel, SageMakerCreateTrainingJob, SageMakerCreateTransformJob, SageMakerUpdateEndpoint, SnsPublish, SqsSendMessage, StepFunctionsInvokeActivity, StepFunctionsStartExecution

Define a Task state in the state machine.

Reaching a Task state causes some work to be executed, represented by the Task's resource property. Task constructs represent a generic Amazon States Language Task.

For some resource types, more specific subclasses of Task may be available which are more convenient to use.

Initializer

new TaskStateBase(scope: Construct, id: string, props: TaskStateBaseProps)

Parameters

• scope Construct
• id string
• props TaskStateBaseProps

Properties

Name	Type	Description
endStates	INextable[]	Continuable states of this Chainable.
id	string	Descriptive identifier for this chainable.
node	ConstructNode	The construct tree node associated with this construct.
startState	State	First state of this Chainable.
stateId	string	Tokenized string that evaluates to the state's ID.
taskMetrics?	TaskMetricsConfig
taskPolicies?	PolicyStatement[]

---

endStates

Type: INextable[]

Continuable states of this Chainable.

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id

Type: string

Descriptive identifier for this chainable.

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node

Type: ConstructNode

The construct tree node associated with this construct.

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startState

Type: State

First state of this Chainable.

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stateId

Type: string

Tokenized string that evaluates to the state's ID.

---

taskMetrics?

Type: TaskMetricsConfig (optional)

---

taskPolicies?

Type: PolicyStatement[] (optional)

Methods

Name	Description
addCatch(handler, props?)	Add a recovery handler for this state.
addPrefix(x)	Add a prefix to the stateId of this state.
addRetry(props?)	Add retry configuration for this state.
bindToGraph(graph)	Register this state as part of the given graph.
metric(metricName, props?)	Return the given named metric for this Task.
metricFailed(props?)	Metric for the number of times this activity fails.
metricHeartbeatTimedOut(props?)	Metric for the number of times the heartbeat times out for this activity.
metricRunTime(props?)	The interval, in milliseconds, between the time the Task starts and the time it closes.
metricScheduleTime(props?)	The interval, in milliseconds, for which the activity stays in the schedule state.
metricScheduled(props?)	Metric for the number of times this activity is scheduled.
metricStarted(props?)	Metric for the number of times this activity is started.
metricSucceeded(props?)	Metric for the number of times this activity succeeds.
metricTime(props?)	The interval, in milliseconds, between the time the activity is scheduled and the time it closes.
metricTimedOut(props?)	Metric for the number of times this activity times out.
next(next)	Continue normal execution with the given state.
toStateJson()	Return the Amazon States Language object for this state.
toString()	Returns a string representation of this construct.
protected whenBoundToGraph(graph)	Called whenever this state is bound to a graph.

---

addCatch(handler, props?)

public addCatch(handler: IChainable, props?: CatchProps): TaskStateBase

Parameters

• handler IChainable
• props CatchProps

Returns

• TaskStateBase

Add a recovery handler for this state.

When a particular error occurs, execution will continue at the error handler instead of failing the state machine execution.

---

addPrefix(x)

public addPrefix(x: string): void

Parameters

• x string

Add a prefix to the stateId of this state.

---

addRetry(props?)

public addRetry(props?: RetryProps): TaskStateBase

Parameters

• props RetryProps

Returns

• TaskStateBase

Add retry configuration for this state.

This controls if and how the execution will be retried if a particular error occurs.

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bindToGraph(graph)

public bindToGraph(graph: StateGraph): void

Parameters

• graph StateGraph

Register this state as part of the given graph.

Don't call this. It will be called automatically when you work with states normally.

---

metric(metricName, props?)

public metric(metricName: string, props?: MetricOptions): Metric

Parameters

• metricName string
• props MetricOptions

Returns

• Metric

Return the given named metric for this Task.

---

metricFailed(props?)

public metricFailed(props?: MetricOptions): Metric

Parameters

• props MetricOptions

Returns

• Metric

Metric for the number of times this activity fails.

---

metricHeartbeatTimedOut(props?)

public metricHeartbeatTimedOut(props?: MetricOptions): Metric

Parameters

• props MetricOptions

Returns

• Metric

Metric for the number of times the heartbeat times out for this activity.

---

metricRunTime(props?)

public metricRunTime(props?: MetricOptions): Metric

Parameters

• props MetricOptions

Returns

• Metric

The interval, in milliseconds, between the time the Task starts and the time it closes.

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metricScheduleTime(props?)

public metricScheduleTime(props?: MetricOptions): Metric

Parameters

• props MetricOptions

Returns

• Metric

The interval, in milliseconds, for which the activity stays in the schedule state.

---

metricScheduled(props?)

public metricScheduled(props?: MetricOptions): Metric

Parameters

• props MetricOptions

Returns

• Metric

Metric for the number of times this activity is scheduled.

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metricStarted(props?)

public metricStarted(props?: MetricOptions): Metric

Parameters

• props MetricOptions

Returns

• Metric

Metric for the number of times this activity is started.

---

metricSucceeded(props?)

public metricSucceeded(props?: MetricOptions): Metric

Parameters

• props MetricOptions

Returns

• Metric

Metric for the number of times this activity succeeds.

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metricTime(props?)

public metricTime(props?: MetricOptions): Metric

Parameters

• props MetricOptions

Returns

• Metric

The interval, in milliseconds, between the time the activity is scheduled and the time it closes.

---

metricTimedOut(props?)

public metricTimedOut(props?: MetricOptions): Metric

Parameters

• props MetricOptions

Returns

• Metric

Metric for the number of times this activity times out.

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next(next)

public next(next: IChainable): Chain

Parameters

• next IChainable

Returns

• Chain

Continue normal execution with the given state.

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toStateJson()

public toStateJson(): json

Returns

• json

Return the Amazon States Language object for this state.

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toString()

public toString(): string

Returns

• string

Returns a string representation of this construct.

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protected whenBoundToGraph(graph)

protected whenBoundToGraph(graph: StateGraph): void

Parameters

• graph StateGraph

Called whenever this state is bound to a graph.

Can be overridden by subclasses.