Lambda => SNS in punchcard

index.ts

import cdk = require('@aws-cdk/core');
import { Function, Topic, string, integer, timestamp } from 'punchcard';

const app = new cdk.App();
export default app;
const stack = new cdk.Stack(app, 'my-stack');

// create a type-safe SNS Topic
const topic = new Topic(stack, 'Topic', {
  type: struct({
    key: string(),
    count: integer(),
    timestamp
  })
});

new Function(stack, 'MyFunction', {
  // depend on the topic
  depends: topic,
  handle: async (event, topic) => {
    // our handle implementation is passed a type-safe pre-initialized 'topic' instance which can be interacted with
    await topic.publish({
      key: 'some key',
      count: 1,
      timestamp: new Date()
    });
  }
});

I assume struct is also imported from 'punchcard'?

I assume struct is also imported from 'punchcard'?

That’s right, I think I made this gist for a medium blog a while back and it’s now out of date. It’s not called struct anymore, it’s called Type, and I changed it to use mix ins.

Better examples here https://github.com/punchcard/punchcard/blob/3f896487c004a4c6df667fdbdd4a74f63ed1715f/examples/src/hello-world.ts#L11

@sam-goodwin 👍