@everestate/serverless-router-event

Serverless Router plugin to handle events at AWS λ

Installation

npm install @everestate/serverless-router @everestate/serverless-router-event --save

Usage

Each routing subject (event object) is expected to to include at least:

• emitter (string) - who published event
• subject (string) - what's the domain of event
• action (string) - what's happen in scope of the domain
• version (string) - event payload version

The routing path looks like "emitter:subject:action:version".

It's fine to use mask to match any part: "emitter:subject:*:version".

const Router = require('@everestate/serverless-router');
const { Event } = require('@everestate/serverless-router-event');

function dispatch(event) {
  const router = new Router([Event]);

  router.event
    .on('steam:listing:created:1', (ctx, event) => ({ ctx, event }))
    .on('steam:listing:updated:1', (ctx, event) => ({ ctx, event }))
    .on('steam:listing:*:1', (ctx, event) => ({ ctx, event }));

  router.mismatch(() => Promise.reject(new Error('Boom!')));

  return router.dispatch(event);
}

function myLambdaHandler(event, context, callback) {
  return dispatch(event)
    .then(result => callback(null, result))
    .catch(error => callback(error));
}