Package software.amazon.awscdk.services.stepfunctions.tasks

Class EvaluateExpression

java.lang.Object

software.amazon.jsii.JsiiObject

software.constructs.Construct

software.amazon.awscdk.services.stepfunctions.State

software.amazon.awscdk.services.stepfunctions.TaskStateBase

software.amazon.awscdk.services.stepfunctions.tasks.EvaluateExpression

All Implemented Interfaces:

IChainable, INextable, software.amazon.jsii.JsiiSerializable, software.constructs.IConstruct, software.constructs.IDependable

@Generated(value="jsii-pacmak/1.116.0 (build 0eddcff)",
           date="2025-10-24T13:34:48.253Z")
@Stability(Stable)
public class EvaluateExpression
extends TaskStateBase

A Step Functions Task to evaluate an expression.

OUTPUT: the output of this task is the evaluated expression.

Example:

 EvaluateExpression convertToSeconds = EvaluateExpression.Builder.create(this, "Convert to seconds")
         .expression("$.waitMilliseconds / 1000")
         .resultPath("$.waitSeconds")
         .build();
 EvaluateExpression createMessage = EvaluateExpression.Builder.create(this, "Create message")
         // Note: this is a string inside a string.
         .expression("`Now waiting ${$.waitSeconds} seconds...`")
         .runtime(Runtime.NODEJS_LATEST)
         .resultPath("$.message")
         .build();
 SnsPublish publishMessage = SnsPublish.Builder.create(this, "Publish message")
         .topic(new Topic(this, "cool-topic"))
         .message(TaskInput.fromJsonPathAt("$.message"))
         .resultPath("$.sns")
         .build();
 Wait wait = Wait.Builder.create(this, "Wait")
         .time(WaitTime.secondsPath("$.waitSeconds"))
         .build();
 StateMachine.Builder.create(this, "StateMachine")
         .definition(convertToSeconds.next(createMessage).next(publishMessage).next(wait))
         .build();
 

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static final class	EvaluateExpression.Builder	A fluent builder for EvaluateExpression.

Nested classes/interfaces inherited from class software.amazon.jsii.JsiiObject

software.amazon.jsii.JsiiObject.InitializationMode

Nested classes/interfaces inherited from interface software.amazon.awscdk.services.stepfunctions.IChainable

IChainable.Jsii$Default

Nested classes/interfaces inherited from interface software.constructs.IConstruct

software.constructs.IConstruct.Jsii$Default

Nested classes/interfaces inherited from interface software.amazon.awscdk.services.stepfunctions.INextable

INextable.Jsii$Default

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	EvaluateExpression(software.amazon.jsii.JsiiObject.InitializationMode initializationMode)
protected	EvaluateExpression(software.amazon.jsii.JsiiObjectRef objRef)
	EvaluateExpression(software.constructs.Construct scope, String id, EvaluateExpressionProps props)

Method Summary

Modifier and Type	Method	Description
protected TaskMetricsConfig	getTaskMetrics()
protected List<PolicyStatement>	getTaskPolicies()

Methods inherited from class software.amazon.awscdk.services.stepfunctions.TaskStateBase

addCatch, addCatch, addRetry, addRetry, getEndStates, metric, metric, metricFailed, metricFailed, metricHeartbeatTimedOut, metricHeartbeatTimedOut, metricRunTime, metricRunTime, metricScheduled, metricScheduled, metricScheduleTime, metricScheduleTime, metricStarted, metricStarted, metricSucceeded, metricSucceeded, metricTime, metricTime, metricTimedOut, metricTimedOut, next, toStateJson, toStateJson, whenBoundToGraph

Methods inherited from class software.amazon.awscdk.services.stepfunctions.State

addBranch, addChoice, addChoice, addItemProcessor, addItemProcessor, addIterator, addPrefix, bindToGraph, filterNextables, findReachableEndStates, findReachableEndStates, findReachableStates, findReachableStates, getArguments, getAssign, getBranches, getComment, getDefaultChoice, getId, getInputPath, getIteration, getOutputPath, getOutputs, getParameters, getProcessor, getProcessorConfig, getProcessorMode, getQueryLanguage, getResultPath, getResultSelector, getStartState, getStateId, getStateName, makeDefault, makeNext, prefixStates, renderAssign, renderAssign, renderBranches, renderChoices, renderChoices, renderInputOutput, renderItemProcessor, renderIterator, renderNextEnd, renderQueryLanguage, renderQueryLanguage, renderResultSelector, renderRetryCatch, renderRetryCatch, setDefaultChoice, setIteration, setProcessor, setProcessorConfig, setProcessorMode, validateState

Methods inherited from class software.constructs.Construct

getNode, isConstruct, toString

Methods inherited from class software.amazon.jsii.JsiiObject

jsiiAsyncCall, jsiiAsyncCall, jsiiCall, jsiiCall, jsiiGet, jsiiGet, jsiiSet, jsiiStaticCall, jsiiStaticCall, jsiiStaticGet, jsiiStaticGet, jsiiStaticSet, jsiiStaticSet

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface software.amazon.jsii.JsiiSerializable

$jsii$toJson

Constructor Details

EvaluateExpression

protected EvaluateExpression(software.amazon.jsii.JsiiObjectRef objRef)

EvaluateExpression

protected EvaluateExpression(software.amazon.jsii.JsiiObject.InitializationMode initializationMode)

EvaluateExpression

@Stability(Stable)
public EvaluateExpression(@NotNull
 software.constructs.Construct scope,
 @NotNull
 String id,
 @NotNull
 EvaluateExpressionProps props)

Parameters:

scope - This parameter is required.

id - Descriptive identifier for this chainable. This parameter is required.

props - This parameter is required.

Method Details

getTaskMetrics

@Stability(Stable)
@Nullable
protected TaskMetricsConfig getTaskMetrics()

Specified by:

getTaskMetrics in class TaskStateBase

getTaskPolicies

@Stability(Stable)
@Nullable
protected List<PolicyStatement> getTaskPolicies()

Specified by:

getTaskPolicies in class TaskStateBase