events: Making inputTransformers available in CfnRule for event bus as a target

[polianaysato]

Describe the feature

Making inputTransformers available in CfnRule for event bus as a target.

Alternatively, making possible to set detailType in EventBridge Pipes with JSONPath (response coming from lambda enrichment step)

Use Case

I have a use case where we integrate MSK cluster with EventBridge Pipes with an Event Bus as a target and enrichment step.

I need to set detail-type dynamically based on the event path. We've tried to achieve that by adding an event rule in the target (event bus) that listens to the kafka event. Then we've tried to set detail-type with the JSONPath.

Currently CfnRule doesn't support set of input, inputPath and inputTransformers for when the target is an event bus (regardless it's in the same or different account).

The docs only mention that it's not possible to use those properties for when event bus is in a different account.

But the feature is not supported for both use cases.

This limitation for setting detail-type dynamically either in EventBridge Pipes or CfnRule (with target = event bus), caused us needing to do a lot of customisation. We had to use a lambda as a target (as opposed to event bus) plus adding a EventBridge client with SDK, besides additional unit tests.

Would there be a way for adding this feature in future releases?

I appreciate your support and help.

Thanks

Proposed Solution

Making inputTransformers available in CfnRule for event bus as a target.

Alternatively, making possible to set detailType with JSONPath (response coming from lambda enrichment step) in EventBridge Pipes.

Other Information

No response

Acknowledgements

• I may be able to implement this feature request
• This feature might incur a breaking change

CDK version used

2.22.6

Environment details (OS name and version, etc.)

2.22.6

[pahud]

CfnRule is CDK L1 construct auto generated based on CFN spec specifically AWS::Events::Rule. Please submit a feature request to https://github.com/aws-cloudformation/cloudformation-coverage-roadmap/issues to help the CFN team prioritize by sharing your use cases. CDK L1 constructs would update as soon as the upstream CFN spec adds relevant props or support.

[polianaysato]

Hi @pahud many thanks for your reply. I've just opened another request with the right team