Interface IEvaluateExpressionProps

Properties for EvaluateExpression.

Inherited Members
Namespace: Amazon.CDK.AWS.StepFunctions.Tasks
Assembly: Amazon.CDK.AWS.StepFunctions.Tasks.dll
Syntax (csharp)
public interface IEvaluateExpressionProps : ITaskStateBaseProps
Syntax (vb)
Public Interface IEvaluateExpressionProps
    Inherits ITaskStateBaseProps
Remarks

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_14_X,
    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

Properties

Expression

The expression to evaluate. The expression may contain state paths.
Runtime

The runtime language to use to evaluate the expression.

Properties

Expression

The expression to evaluate. The expression may contain state paths.

string Expression { get; }
Property Value

System.String

Remarks

Example value: '$.a + $.b'

Runtime

The runtime language to use to evaluate the expression.

virtual Runtime Runtime { get; }
Property Value

Runtime

Remarks

Default: lambda.Runtime.NODEJS_14_X