feat(iotevents): support actions #18869

yamatatsu · 2022-02-08T13:50:03Z

This PR allow IoT Events detector model to perform actions as this documentation.
This PR is in roadmap of #17711.

With this fix, all the interfaces of the DetectorModel are now implemented! And next works is implementing expressions and actions.

The exapmle in readme became not simple, so also this PR has sorted explanation of readme.

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license

gitpod-io · 2022-02-08T13:50:06Z

packages/@aws-cdk/aws-iotevents/lib/detector-model.ts

skinny85

Looks good @yamatatsu, but we need a few more iterations before we can merge this in.

Thanks for the great contribution, as always!

packages/@aws-cdk/aws-iotevents/README.md

packages/@aws-cdk/aws-iotevents/lib/state.ts

packages/@aws-cdk/aws-iotevents/test/detector-model.test.ts

packages/@aws-cdk/aws-iotevents/test/integ.detector-model.ts

Co-authored-by: Adam Ruka <[email protected]>

Pull request has been modified.

Co-authored-by: Adam Ruka <[email protected]>

This PR creates new module for aws-iotevents. This PR will contain implementations of Detector Model action classes. About #18869 (comment) . ---- *By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license*

This PR creates new module for aws-iotevents. This PR will contain implementations of Detector Model action classes. About aws#18869 (comment) . ---- *By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license*

skinny85

Thanks for the contribution @yamatatsu! This is starting to take shape, but I think we need a few more iterations before we nail the final API of this 🙂.

packages/@aws-cdk/aws-iotevents/README.md

packages/@aws-cdk/aws-iotevents/lib/action.ts

packages/@aws-cdk/aws-iotevents/lib/state.ts

skinny85 · 2022-03-01T19:16:25Z

packages/@aws-cdk/aws-iotevents/lib/state.ts

@@ -150,6 +214,7 @@ function toTransitionEventsJson(transitionEvents: TransitionEvent[]): CfnDetecto
  return transitionEvents.map(transitionEvent => ({
    eventName: transitionEvent.eventName,
    condition: transitionEvent.condition.evaluate(),
+    actions: transitionEvent.actions?.map(action => action.renderActionConfig().configuration),


We should not be calling renderActionConfig() (soon called bind()) more than once, because it can have side effects, like creating Constructs.

This code will call bind() once by actions by calling DetectorModel constructor. But if a action is used in two detector models, bind() of the action will be called twice.
Is it problem?

Nope! That's exactly how it's supposed to work.

Notice that the second detector model will call bind() with different arguments than the first one.

Also, add a unit test for it, and we'll find out 🙂.

I added the test! Calling bind twice worked without errors.
Ah.. But if an action set twice to an detector model and the action grant the role something, probably same policy will be added to the role. Is it better that we control it? 🤔

Nope! Just let IAM de-duplication handle it.

packages/@aws-cdk/aws-iotevents/lib/state.ts

packages/@aws-cdk/aws-iotevents-actions/lib/lambda-invoke-action.ts

yamatatsu · 2022-03-02T12:48:33Z

I'll address the comments and revert something to keep the difference small... Sorry!

skinny85 · 2022-03-02T16:44:56Z

No worries @yamatatsu, thanks for all of your hard work on this!

Pull request has been modified.

skinny85

Looks great @yamatatsu! 2 minor comments, and we'll get this merged.

skinny85 · 2022-03-03T18:26:17Z

packages/@aws-cdk/aws-iotevents/lib/state.ts

+  scope: Construct,
+  actionBindOptions: ActionBindOptions,
+  events: Event[],
+): CfnDetectorModel.EventProperty[] | undefined {


When does this return undefined?

Ah.. It is a remnant of big refactoring..

skinny85 · 2022-03-03T18:29:57Z

packages/@aws-cdk/aws-iotevents/test/integ.detector-model.ts

    });
-    // 2st => 1st
    offlineState.transitionTo(onlineState, {
      when: iotevents.Expression.eq(
        iotevents.Expression.inputAttribute(input, 'payload.temperature'),


Can we just leave this test unchanged? We already have an integ test in the @aws-cdk/aws-iotevents-actions module, I don't think we need this too.

Pull request has been modified.

skinny85

Thanks @yamatatsu!

mergify · 2022-03-04T19:58:00Z

Thank you for contributing! Your pull request will be updated from master and then merged automatically (do not update manually, and be sure to allow changes to be pushed to your fork).

aws-cdk-automation · 2022-03-04T21:34:22Z

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Commit ID: de801e0
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mergify · 2022-03-04T21:34:39Z

Thank you for contributing! Your pull request will be updated from master and then merged automatically (do not update manually, and be sure to allow changes to be pushed to your fork).

This PR allow IoT Events detector model to perform actions as [this documentation](https://docs.aws.amazon.com/iotevents/latest/developerguide/iotevents-supported-actions.html). This PR is in roadmap of aws#17711. ![スクリーンショット 2022-02-08 22 43 33](https://user-images.githubusercontent.com/11013683/152999288-81721f15-fefb-4108-b34b-aab3f88a7ab8.png) With this fix, all the interfaces of the DetectorModel are now implemented! And next works is implementing expressions and actions. The exapmle in readme became not simple, so also this PR has sorted explanation of readme. ---- *By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license*

github-actions bot added the @aws-cdk/aws-iotevents Related to AWS IoT Events label Feb 8, 2022

github-actions bot assigned skinny85 Feb 8, 2022

feat(iotevents): support actions

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yamatatsu mentioned this pull request Feb 12, 2022

feat(iotevents): create new module for IoT Events actions #18956

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feat(iotevents): support actions #18869

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