enum EventEvaluation 🔹

Language	Type name
.NET	Amazon.CDK.AWS.IoTEvents.EventEvaluation
Java	software.amazon.awscdk.services.iotevents.EventEvaluation
Python	aws_cdk.aws_iotevents.EventEvaluation
TypeScript (source)	@aws-cdk/aws-iotevents » EventEvaluation

Information about the order in which events are evaluated and how actions are executed.

Example

import * as iotevents from '@aws-cdk/aws-iotevents';
import * as actions from '@aws-cdk/aws-iotevents-actions';
import * as lambda from '@aws-cdk/aws-lambda';

declare const func: lambda.IFunction;

const input = new iotevents.Input(this, 'MyInput', {
  inputName: 'my_input', // optional
  attributeJsonPaths: ['payload.deviceId', 'payload.temperature'],
});

const warmState = new iotevents.State({
  stateName: 'warm',
  onEnter: [{
    eventName: 'test-enter-event',
    condition: iotevents.Expression.currentInput(input),
    actions: [new actions.LambdaInvokeAction(func)], // optional
  }],
  onInput: [{ // optional
    eventName: 'test-input-event',
    actions: [new actions.LambdaInvokeAction(func)],
  }],
  onExit: [{ // optional
    eventName: 'test-exit-event',
    actions: [new actions.LambdaInvokeAction(func)],
  }],
});
const coldState = new iotevents.State({
  stateName: 'cold',
});

// transit to coldState when temperature is less than 15
warmState.transitionTo(coldState, {
  eventName: 'to_coldState', // optional property, default by combining the names of the States
  when: iotevents.Expression.lt(
    iotevents.Expression.inputAttribute(input, 'payload.temperature'),
    iotevents.Expression.fromString('15'),
  ),
  executing: [new actions.LambdaInvokeAction(func)], // optional
});
// transit to warmState when temperature is greater than or equal to 15
coldState.transitionTo(warmState, {
  when: iotevents.Expression.gte(
    iotevents.Expression.inputAttribute(input, 'payload.temperature'),
    iotevents.Expression.fromString('15'),
  ),
});

new iotevents.DetectorModel(this, 'MyDetectorModel', {
  detectorModelName: 'test-detector-model', // optional
  description: 'test-detector-model-description', // optional property, default is none
  evaluationMethod: iotevents.EventEvaluation.SERIAL, // optional property, default is iotevents.EventEvaluation.BATCH
  detectorKey: 'payload.deviceId', // optional property, default is none and single detector instance will be created and all inputs will be routed to it
  initialState: warmState,
});

Members

Name	Description
BATCH 🔹	When setting to BATCH, variables within a state are updated and events within a state are performed only after all event conditions are evaluated.
SERIAL 🔹	When setting to SERIAL, variables are updated and event conditions are evaluated in the order that the events are defined.

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BATCH 🔹

When setting to BATCH, variables within a state are updated and events within a state are performed only after all event conditions are evaluated.

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SERIAL 🔹

When setting to SERIAL, variables are updated and event conditions are evaluated in the order that the events are defined.