Class EvaluateExpression

A Step Functions Task to evaluate an expression.

Inheritance
object
State
TaskStateBase
EvaluateExpression
Implements
Inherited Members
Namespace: Amazon.CDK.AWS.StepFunctions.Tasks
Assembly: Amazon.CDK.Lib.dll
Syntax (csharp)
public class EvaluateExpression : TaskStateBase, IChainable, INextable
Syntax (vb)
Public Class EvaluateExpression Inherits TaskStateBase Implements IChainable, INextable
Remarks

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

ExampleMetadata: infused

Examples
var convertToSeconds = new EvaluateExpression(this, "Convert to seconds", new EvaluateExpressionProps {
                 Expression = "$.waitMilliseconds / 1000",
                 ResultPath = "$.waitSeconds"
             });

             var createMessage = new EvaluateExpression(this, "Create message", new EvaluateExpressionProps {
                 // Note: this is a string inside a string.
                 Expression = "`Now waiting ${$.waitSeconds} seconds...`",
                 Runtime = Runtime.NODEJS_LATEST,
                 ResultPath = "$.message"
             });

             var publishMessage = new SnsPublish(this, "Publish message", new SnsPublishProps {
                 Topic = new Topic(this, "cool-topic"),
                 Message = TaskInput.FromJsonPathAt("$.message"),
                 ResultPath = "$.sns"
             });

             var wait = new Wait(this, "Wait", new WaitProps {
                 Time = WaitTime.SecondsPath("$.waitSeconds")
             });

             new StateMachine(this, "StateMachine", new StateMachineProps {
                 Definition = convertToSeconds.Next(createMessage).Next(publishMessage).Next(wait)
             });

Synopsis

Constructors

EvaluateExpression(Construct, string, IEvaluateExpressionProps)

A Step Functions Task to evaluate an expression.

Properties

TaskMetrics

A Step Functions Task to evaluate an expression.
TaskPolicies

A Step Functions Task to evaluate an expression.

Constructors

EvaluateExpression(Construct, string, IEvaluateExpressionProps)

A Step Functions Task to evaluate an expression.

public EvaluateExpression(Construct scope, string id, IEvaluateExpressionProps props)
Parameters
scope Construct
id string

Descriptive identifier for this chainable.

props IEvaluateExpressionProps
Remarks

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

ExampleMetadata: infused

Properties

TaskMetrics

A Step Functions Task to evaluate an expression.

protected override ITaskMetricsConfig? TaskMetrics { get; }
Property Value

ITaskMetricsConfig

Overrides
Remarks

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

ExampleMetadata: infused

TaskPolicies

A Step Functions Task to evaluate an expression.

protected override PolicyStatement[]? TaskPolicies { get; }
Property Value

PolicyStatement[]

Overrides
Remarks

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

ExampleMetadata: infused

Implements