(aws-events): ApiDestination missing fromArn methods for existing API destinations

[keenangraham]

Describe the bug

ApiDestination doesn't have any way to reference an existing EventBridge API destination:

aws-cdk/packages/aws-cdk-lib/aws-events/lib/api-destination.ts

Lines 70 to 107 in f00f918

	export class ApiDestination extends Resource implements IApiDestination {
	/**
	* The Connection to associate with Api Destination
	*/
	public readonly connection: IConnection;
	/**
	* The Name of the Api Destination created.
	* @attribute
	*/
	public readonly apiDestinationName: string;
	/**
	* The ARN of the Api Destination created.
	* @attribute
	*/
	public readonly apiDestinationArn: string;
	constructor(scope: Construct, id: string, props: ApiDestinationProps) {
	super(scope, id, {
	physicalName: props.apiDestinationName,
	});
	this.connection = props.connection;
	let apiDestination = new CfnApiDestination(this, 'ApiDestination', {
	connectionArn: this.connection.connectionArn,
	description: props.description,
	httpMethod: props.httpMethod ?? HttpMethod.POST,
	invocationEndpoint: props.endpoint,
	invocationRateLimitPerSecond: props.rateLimitPerSecond,
	name: this.physicalName,
	});
	this.apiDestinationName = this.getResourceNameAttribute(apiDestination.ref);
	this.apiDestinationArn = apiDestination.attrArn;
	}
	}

This is problematic because the aws-events-targets.ApiDestination expects an aws-events.ApiDestination:

aws-cdk/packages/aws-cdk-lib/aws-events-targets/lib/api-destination.ts

Line 63 in f00f918

private readonly apiDestination: events.IApiDestination,

I would like to have multiple Rules targeting the same (existing) ApiDestination. In my case the API destination is a Slack webhook with a secret in the URL endpoint.

Expected Behavior

To be able to reference an existing API destination by an ARN, like in Connection:

aws-cdk/packages/aws-cdk-lib/aws-events/lib/connection.ts

Line 303 in f00f918

public static fromEventBusArn(scope: Construct, id: string, connectionArn: string, connectionSecretArn: string): IConnection {

Or Eventbus:

aws-cdk/packages/aws-cdk-lib/aws-events/lib/event-bus.ts

Line 171 in f00f918

public static fromEventBusArn(scope: Construct, id: string, eventBusArn: string): IEventBus {

Current Behavior

No method to reference existing EventBridge API destination by ARN.

Reproduction Steps

Try to import existing API destination.

Possible Solution

Add ImportedApiConnection and method.

Additional Information/Context

No response

CDK CLI Version

2.138.0

Framework Version

No response

Node.js Version

20

OS

Sonoma

Language

Python

Language Version

No response

Other information

No response

[khushail]

thanks @keenangraham for reporting this.

[github-actions]

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[aws-cdk-automation]

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