(scheduler-targets-alpha): Make the event bus in EventBridgePutEventsEntry optional

[daschaa]

Describe the feature

When creating a EventBridgePutEvents target for a Schedule the event entry has to be of type EventBridgePutEventsEntry. The shape of the interface looks like this:

export interface EventBridgePutEventsEntry {
    readonly detail: ScheduleTargetInput;
    readonly detailType: string;
    readonly eventBus: events.IEventBus;
    readonly source: string;
}

For me as an user it would be good to have the eventBus as an optional property. So when the eventBus is not defined, the default event bus is used.

Use Case

Creating a target without specifying an event bus (just use the default one).

Proposed Solution

No response

Other Information

No response

Acknowledgements

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

CDK version used

2.141.0

Environment details (OS name and version, etc.)

Mac

[pahud]

Makes sense to me. What value should we assign for the default event bus if undefined? Did you find any doc about it?

[daschaa]

@pahud I did not find anything about that. So the synthesized construct would need to have the ARN of the default event bus.
Since the service and resource part of the ARN are static, it should be doable to build the ARN with the environments region and account id.
The challenge here is that we (if I see it correctly) don't have all of the information in the super call of the constructor.