(aws-apigatewayv2): add routes to imported httpapi (IHttpApi)

Allow routes to be added to an existing HttpApi. Currently this is not an option

Use Case

We currently have an api gateway connected to an alb via vpclink on the default route and are slowly peeling off services and converting them to lambdas. This is easily done by defining explicit routes for our services as we move them over. The problem is that these new services are built and managed in their own cdk projects (deployed via codepipeline cdk stacks in their projects) but since the api gateway is defined elsewhere it needs to be imported to add the routes.

It looks like the only option we have currently would be to move all rest service stacks into the project the api gateway is in but this will quickly lead to a bloated and inefficient build/deploy process

Proposed Solution

allow routes to be added on IHttpApi or provide some other way to import an existing gateway and add routes

      const api = HttpApi.fromHttpApiAttributes(this, 'gateway', {
           httpApiId: 'myGateway',
       });

       api.addRoutes({
           path,
           methods,
           integration,
       });

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

---

This is a 🚀 Feature Request

[nija-at]

Thanks for filing this request.

In the meantime, you can achieve this by using our lower level constructs, specifically CfnRoute.

[brandon-kyle-bailey]

+2 months later. Any update on this?