StepFunctionsStartExecution
A Step Functions Task to call StartExecution on another state machine.
It supports three service integration patterns: REQUEST_RESPONSE, RUN_JOB, and WAIT_FOR_TASK_TOKEN.
Example
ts
// Define a state machine with one Pass state
const child = new sfn.StateMachine(this, 'ChildStateMachine', {
definition: sfn.Chain.start(new sfn.Pass(this, 'PassState')),
});
// Include the state machine in a Task state with callback pattern
const task = new tasks.StepFunctionsStartExecution(this, 'ChildTask', {
stateMachine: child,
integrationPattern: sfn.IntegrationPattern.WAIT_FOR_TASK_TOKEN,
input: sfn.TaskInput.fromObject({
token: sfn.JsonPath.taskToken,
foo: 'bar',
}),
name: 'MyExecutionName',
});
// Define a second state machine with the Task state above
new sfn.StateMachine(this, 'ParentStateMachine', {
definition: task,
});
python
# Define a state machine with one Pass state
child = sfn.StateMachine(self, "ChildStateMachine",
definition=sfn.Chain.start(sfn.Pass(self, "PassState"))
)
# Include the state machine in a Task state with callback pattern
task = tasks.StepFunctionsStartExecution(self, "ChildTask",
state_machine=child,
integration_pattern=sfn.IntegrationPattern.WAIT_FOR_TASK_TOKEN,
input=sfn.TaskInput.from_object({
"token": sfn.JsonPath.task_token,
"foo": "bar"
}),
name="MyExecutionName"
)
# Define a second state machine with the Task state above
sfn.StateMachine(self, "ParentStateMachine",
definition=task
)
java
// Define a state machine with one Pass state
StateMachine child = StateMachine.Builder.create(this, "ChildStateMachine")
.definition(Chain.start(new Pass(this, "PassState")))
.build();
// Include the state machine in a Task state with callback pattern
StepFunctionsStartExecution task = StepFunctionsStartExecution.Builder.create(this, "ChildTask")
.stateMachine(child)
.integrationPattern(IntegrationPattern.WAIT_FOR_TASK_TOKEN)
.input(TaskInput.fromObject(Map.of(
"token", JsonPath.getTaskToken(),
"foo", "bar")))
.name("MyExecutionName")
.build();
// Define a second state machine with the Task state above
// Define a second state machine with the Task state above
StateMachine.Builder.create(this, "ParentStateMachine")
.definition(task)
.build();
csharp
// Install: dotnet add package Amazon.CDK.Lib
// Define a state machine with one Pass state
var child = new StateMachine(this, "ChildStateMachine", new StateMachineProps {
Definition = Chain.Start(new Pass(this, "PassState"))
});
// Include the state machine in a Task state with callback pattern
var task = new StepFunctionsStartExecution(this, "ChildTask", new StepFunctionsStartExecutionProps {
StateMachine = child,
IntegrationPattern = IntegrationPattern.WAIT_FOR_TASK_TOKEN,
Input = TaskInput.FromObject(new Dictionary<string, object> {
{ "token", JsonPath.TaskToken },
{ "foo", "bar" }
}),
Name = "MyExecutionName"
});
// Define a second state machine with the Task state above
// Define a second state machine with the Task state above
new StateMachine(this, "ParentStateMachine", new StateMachineProps {
Definition = task
});
go
// Install: go get github.com/aws/aws-cdk-go/awscdk/v2
// Define a state machine with one Pass state
child := sfn.NewStateMachine(this, jsii.String("ChildStateMachine"), &StateMachineProps{
Definition: sfn.Chain_Start(sfn.NewPass(this, jsii.String("PassState"))),
})
// Include the state machine in a Task state with callback pattern
task := tasks.NewStepFunctionsStartExecution(this, jsii.String("ChildTask"), &StepFunctionsStartExecutionProps{
StateMachine: child,
IntegrationPattern: sfn.IntegrationPattern_WAIT_FOR_TASK_TOKEN,
Input: sfn.TaskInput_FromObject(map[string]interface{}{
"token": sfn.JsonPath_taskToken(),
"foo": jsii.String("bar"),
}),
Name: jsii.String("MyExecutionName"),
})
// Define a second state machine with the Task state above
// Define a second state machine with the Task state above
sfn.NewStateMachine(this, jsii.String("ParentStateMachine"), &StateMachineProps{
Definition: task,
})
Initializer
ts
new StepFunctionsStartExecution(scope: Construct, id: string, props: StepFunctionsStartExecutionProps)
python
StepFunctionsStartExecution(scope: Construct, id: str, props: StepFunctionsStartExecutionProps)
java
new StepFunctionsStartExecution(Construct scope, String id, StepFunctionsStartExecutionProps props)
csharp
new StepFunctionsStartExecution(Construct scope, string id, StepFunctionsStartExecutionProps props)
go
NewStepFunctionsStartExecution(Scope Construct, Id *string, Props StepFunctionsStartExecutionProps)
Construct Props
assignoptional{ [key: string]: any }assignoptionaltyping.Mapping[str, Any]assignoptionalMap<String, Object>AssignoptionalIDictionary<string, object>Assignoptional*map[string]interface{}#Workflow variables to store in this step.
Default: Not assign variables
Using workflow variables, you can store data in a step and retrieve that data in future steps.
associateWithParentoptionalbooleanassociate_with_parentoptionalboolassociateWithParentoptionalBooleanAssociateWithParentoptionalboolAssociateWithParentoptional*bool= false#Pass the execution ID from the context object to the execution input.
notes
This allows the Step Functions UI to link child executions from parent executions, making it easier to trace execution flow across state machines.
If you set this property to true, the input property must be an object (provided by sfn.TaskInput.fromObject) or omitted entirely.
commentoptionalstringcommentoptionalstrcommentoptionalStringCommentoptionalstringCommentoptional*string#A comment describing this state.
Default: No comment
credentialsoptionalCredentialscredentialsoptionalCredentialscredentialsoptionalCredentialsCredentialsoptionalCredentialsCredentialsoptionalCredentials#Credentials for an IAM Role that the State Machine assumes for executing the task.
Default: None (Task is executed using the State Machine's execution role)
This enables cross-account resource invocations.
heartbeatoptionalDurationheartbeatoptionalDurationheartbeatoptionalDurationHeartbeatoptionalDurationHeartbeatoptionalDuration= Nonedeprecated#use `heartbeatTimeout`
heartbeatTimeoutoptionalTimeoutheartbeat_timeoutoptionalTimeoutheartbeatTimeoutoptionalTimeoutHeartbeatTimeoutoptionalTimeoutHeartbeatTimeoutoptionalTimeout= None#Timeout for the heartbeat.
[disable-awslint:duration-prop-type] is needed because all props interface in aws-stepfunctions-tasks extend this interface
inputoptionalTaskInputinputoptionalTaskInputinputoptionalTaskInputInputoptionalTaskInputInputoptionalTaskInput#The JSON input for the execution, same as that of StartExecution.
Default: The state input (JSON path '$')
inputPathoptionalstringinput_pathoptionalstrinputPathoptionalStringInputPathoptionalstringInputPathoptional*string= $#JSONPath expression to select part of the state to be the input to this state.
May also be the special value JsonPath.DISCARD, which will cause the effective input to be the empty object {}.
integrationPatternoptionalIntegrationPatternintegration_patternoptionalIntegrationPatternintegrationPatternoptionalIntegrationPatternIntegrationPatternoptionalIntegrationPatternIntegrationPatternoptionalIntegrationPattern#AWS Step Functions integrates with services directly in the Amazon States Language.
Default: IntegrationPattern.REQUEST_RESPONSE for most tasks. IntegrationPattern.RUN_JOB for the following exceptions: BatchSubmitJob, EmrAddStep, EmrCreateCluster, EmrTerminationCluster, and EmrContainersStartJobRun.
You can control these AWS services using service integration patterns.
Depending on the AWS Service, the Service Integration Pattern availability will vary.
The name of the execution, same as that of StartExecution.
outputPathoptionalstringoutput_pathoptionalstroutputPathoptionalStringOutputPathoptionalstringOutputPathoptional*string= $#JSONPath expression to select part of the state to be the output to this state.
May also be the special value JsonPath.DISCARD, which will cause the effective output to be the empty object {}.
outputsoptionalanyoutputsoptionalAnyoutputsoptionalObjectOutputsoptionalobjectOutputsoptionalinterface{}#Used to specify and transform output from the state.
Default: $states.result or $states.errorOutput
notes
When specified, the value overrides the state output default. The output field accepts any JSON value (object, array, string, number, boolean, null). Any string value, including those inside objects or arrays, will be evaluated as JSONata if surrounded by {% %} characters. Output also accepts a JSONata expression directly.
queryLanguageoptionalQueryLanguagequery_languageoptionalQueryLanguagequeryLanguageoptionalQueryLanguageQueryLanguageoptionalQueryLanguageQueryLanguageoptionalQueryLanguage= JSONPath#The name of the query language used by the state.
If the state does not contain a queryLanguage field, then it will use the query language specified in the top-level queryLanguage field.
resultPathoptionalstringresult_pathoptionalstrresultPathoptionalStringResultPathoptionalstringResultPathoptional*string= $#JSONPath expression to indicate where to inject the state's output.
May also be the special value JsonPath.DISCARD, which will cause the state's input to become its output.
resultSelectoroptional{ [key: string]: any }result_selectoroptionaltyping.Mapping[str, Any]resultSelectoroptionalMap<String, Object>ResultSelectoroptionalIDictionary<string, object>ResultSelectoroptional*map[string]interface{}= None#The JSON that will replace the state's raw result and become the effective result before ResultPath is applied.
You can use ResultSelector to create a payload with values that are static or selected from the state's raw result.
stateMachineIStateMachineRefstate_machineIStateMachineRefstateMachineIStateMachineRefStateMachineIStateMachineRefStateMachineIStateMachineRefrequired#The Step Functions state machine to start the execution on.
stateNameoptionalstringstate_nameoptionalstrstateNameoptionalStringStateNameoptionalstringStateNameoptional*string#Optional name for this state.
Default: The construct ID will be used as state name
Properties
Methods
addCatch(handler: IChainable, props?: CatchProps): TaskStateBasedef add_catch(self, handler: IChainable, props: typing.Optional[CatchProps] = None) -> TaskStateBasepublic TaskStateBase addCatch(IChainable handler, CatchProps props)public TaskStateBase AddCatch(IChainable handler, CatchProps? props = null)func AddCatch(Handler IChainable, Props CatchProps) 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: string): voiddef add_prefix(self, x: str) -> Nonepublic void addPrefix(String x)public void AddPrefix(string x)func AddPrefix(X *string)#Add a prefix to the stateId of this state.
addRetry(props?: RetryProps): TaskStateBasedef add_retry(self, props: typing.Optional[RetryProps] = None) -> TaskStateBasepublic TaskStateBase addRetry(RetryProps props)public TaskStateBase AddRetry(RetryProps? props = null)func AddRetry(Props RetryProps) TaskStateBase#Add retry configuration for this state.
This controls if and how the execution will be retried if a particular error occurs.
bindToGraph(graph: StateGraph): voiddef bind_to_graph(self, graph: StateGraph) -> Nonepublic void bindToGraph(StateGraph graph)public void BindToGraph(StateGraph graph)func BindToGraph(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.
filterNextables(states: State[]): INextable[]@staticmethod def filter_nextables(states: typing.List[State]) -> typing.List[INextable]public static List<INextable> filterNextables(List<State> states)public static INextable[] FilterNextables(State[] states)func FilterNextables(States *[]State) *[]INextablestatic#Return only the states that allow chaining from an array of states.
findReachableEndStates(start: State, options?: FindStateOptions): State[]@staticmethod def find_reachable_end_states(start: State, options: typing.Optional[FindStateOptions] = None) -> typing.List[State]public static List<State> findReachableEndStates(State start, FindStateOptions options)public static State[] FindReachableEndStates(State start, FindStateOptions? options = null)func FindReachableEndStates(Start State, Options FindStateOptions) *[]Statestatic#Find the set of end states states reachable through transitions from the given start state.
findReachableStates(start: State, options?: FindStateOptions): State[]@staticmethod def find_reachable_states(start: State, options: typing.Optional[FindStateOptions] = None) -> typing.List[State]public static List<State> findReachableStates(State start, FindStateOptions options)public static State[] FindReachableStates(State start, FindStateOptions? options = null)func FindReachableStates(Start State, Options FindStateOptions) *[]Statestatic#Find the set of states reachable through transitions from the given start state.
This does not retrieve states from within sub-graphs, such as states within a Parallel state's branch.
isConstruct(x: any): boolean@staticmethod def is_construct(x: Any) -> boolpublic static Boolean isConstruct(Object x)public static bool IsConstruct(object x)func IsConstruct(X interface{}) *boolstatic#Checks if `x` is a construct.
notes · 1 parameter · returns
Use this method instead of instanceof to properly detect Construct instances, even when the construct library is symlinked.
Explanation: in JavaScript, multiple copies of the constructs library on disk are seen as independent, completely different libraries. As a consequence, the class Construct in each copy of the constructs library is seen as a different class, and an instance of one class will not test as instanceof the other class. npm install will not create installations like this, but users may manually symlink construct libraries together or use a monorepo tool: in those cases, multiple copies of the constructs library can be accidentally installed, and instanceof will behave unpredictably. It is safest to avoid using instanceof, and using this type-testing method instead.
Parameters
xxxxX— Any object.
Returns: true if x is an object created from a class which extends Construct.
jsonata(scope: Construct, id: string, props: StepFunctionsStartExecutionJsonataProps): StepFunctionsStartExecution // chainable@staticmethod def jsonata(scope: Construct, id: str, props: StepFunctionsStartExecutionJsonataProps) -> StepFunctionsStartExecutionpublic static StepFunctionsStartExecution jsonata(Construct scope, String id, StepFunctionsStartExecutionJsonataProps props)public static StepFunctionsStartExecution Jsonata(Construct scope, string id, StepFunctionsStartExecutionJsonataProps props)func Jsonata(Scope Construct, Id *string, Props StepFunctionsStartExecutionJsonataProps) StepFunctionsStartExecutionstatic#A Step Functions Task using JSONata to call StartExecution on another state machine.
It supports three service integration patterns: REQUEST_RESPONSE, RUN_JOB, and WAIT_FOR_TASK_TOKEN.
jsonPath(scope: Construct, id: string, props: StepFunctionsStartExecutionJsonPathProps): StepFunctionsStartExecution // chainable@staticmethod def json_path(scope: Construct, id: str, props: StepFunctionsStartExecutionJsonPathProps) -> StepFunctionsStartExecutionpublic static StepFunctionsStartExecution jsonPath(Construct scope, String id, StepFunctionsStartExecutionJsonPathProps props)public static StepFunctionsStartExecution JsonPath(Construct scope, string id, StepFunctionsStartExecutionJsonPathProps props)func JsonPath(Scope Construct, Id *string, Props StepFunctionsStartExecutionJsonPathProps) StepFunctionsStartExecutionstatic#A Step Functions Task using JSONPath to call StartExecution on another state machine.
It supports three service integration patterns: REQUEST_RESPONSE, RUN_JOB, and WAIT_FOR_TASK_TOKEN.
metric(metricName: string, props?: MetricOptions): Metricdef metric(self, metric_name: str, props: typing.Optional[MetricOptions] = None) -> Metricpublic Metric metric(String metricName, MetricOptions props)public Metric Metric(string metricName, MetricOptions? props = null)func Metric(MetricName *string, Props MetricOptions) Metric#Return the given named metric for this Task.
metricFailed(props?: MetricOptions): Metricdef metric_failed(self, props: typing.Optional[MetricOptions] = None) -> Metricpublic Metric metricFailed(MetricOptions props)public Metric MetricFailed(MetricOptions? props = null)func MetricFailed(Props MetricOptions) Metric#Metric for the number of times this activity fails.
metricHeartbeatTimedOut(props?: MetricOptions): Metricdef metric_heartbeat_timed_out(self, props: typing.Optional[MetricOptions] = None) -> Metricpublic Metric metricHeartbeatTimedOut(MetricOptions props)public Metric MetricHeartbeatTimedOut(MetricOptions? props = null)func MetricHeartbeatTimedOut(Props MetricOptions) Metric#Metric for the number of times the heartbeat times out for this activity.
metricRunTime(props?: MetricOptions): Metricdef metric_run_time(self, props: typing.Optional[MetricOptions] = None) -> Metricpublic Metric metricRunTime(MetricOptions props)public Metric MetricRunTime(MetricOptions? props = null)func MetricRunTime(Props MetricOptions) Metric#The interval, in milliseconds, between the time the Task starts and the time it closes.
metricScheduled(props?: MetricOptions): Metricdef metric_scheduled(self, props: typing.Optional[MetricOptions] = None) -> Metricpublic Metric metricScheduled(MetricOptions props)public Metric MetricScheduled(MetricOptions? props = null)func MetricScheduled(Props MetricOptions) Metric#Metric for the number of times this activity is scheduled.
metricScheduleTime(props?: MetricOptions): Metricdef metric_schedule_time(self, props: typing.Optional[MetricOptions] = None) -> Metricpublic Metric metricScheduleTime(MetricOptions props)public Metric MetricScheduleTime(MetricOptions? props = null)func MetricScheduleTime(Props MetricOptions) Metric#The interval, in milliseconds, for which the activity stays in the schedule state.
metricStarted(props?: MetricOptions): Metricdef metric_started(self, props: typing.Optional[MetricOptions] = None) -> Metricpublic Metric metricStarted(MetricOptions props)public Metric MetricStarted(MetricOptions? props = null)func MetricStarted(Props MetricOptions) Metric#Metric for the number of times this activity is started.
metricSucceeded(props?: MetricOptions): Metricdef metric_succeeded(self, props: typing.Optional[MetricOptions] = None) -> Metricpublic Metric metricSucceeded(MetricOptions props)public Metric MetricSucceeded(MetricOptions? props = null)func MetricSucceeded(Props MetricOptions) Metric#Metric for the number of times this activity succeeds.
metricTime(props?: MetricOptions): Metricdef metric_time(self, props: typing.Optional[MetricOptions] = None) -> Metricpublic Metric metricTime(MetricOptions props)public Metric MetricTime(MetricOptions? props = null)func MetricTime(Props MetricOptions) Metric#The interval, in milliseconds, between the time the activity is scheduled and the time it closes.
metricTimedOut(props?: MetricOptions): Metricdef metric_timed_out(self, props: typing.Optional[MetricOptions] = None) -> Metricpublic Metric metricTimedOut(MetricOptions props)public Metric MetricTimedOut(MetricOptions? props = null)func MetricTimedOut(Props MetricOptions) Metric#Metric for the number of times this activity times out.
next(next: IChainable): Chaindef next(self, next: IChainable) -> Chainpublic Chain next(IChainable next)public Chain Next(IChainable next)func Next(Next IChainable) Chain#Continue normal execution with the given state.
prefixStates(root: IConstruct, prefix: string): void@staticmethod def prefix_states(root: IConstruct, prefix: str) -> Nonepublic static void prefixStates(IConstruct root, String prefix)public static void PrefixStates(IConstruct root, string prefix)func PrefixStates(Root IConstruct, Prefix *string)static#Add a prefix to the stateId of all States found in a construct tree.
toStateJson(topLevelQueryLanguage?: QueryLanguage): jsondef to_state_json(self, top_level_query_language: typing.Optional[QueryLanguage] = None) -> Anypublic Object toStateJson(QueryLanguage topLevelQueryLanguage)public object ToStateJson(QueryLanguage? topLevelQueryLanguage = null)func ToStateJson(TopLevelQueryLanguage QueryLanguage) interface{}#Return the Amazon States Language object for this state.
toString(): stringdef to_string(self, ) -> strpublic String toString()public string ToString()func ToString() *string#Returns a string representation of this construct.
with(...mixins: IMixin[]): IConstructdef with(self, mixins: IMixin) -> IConstructpublic IConstruct with(IMixin mixins)public IConstruct With(IMixin mixins)func With(Mixins IMixin) IConstruct#Applies one or more mixins to this construct.
Mixins are applied in order. The list of constructs is captured at the start of the call, so constructs added by a mixin will not be visited. Use multiple with() calls if subsequent mixins should apply to added constructs.
1 parameter · returns
Parameters
mixinsmixinsmixinsmixinsMixins— The mixins to apply.
Returns: This construct for chaining