Practical Microservices

Configuring the Aggregator

We need to pull this Aggregator into config.js and modify src/index.js so that it calls the Aggregator’s start function. config.js first, then start:

video-tutorials/src/config.js

// ...
const createHomePageAggregator = require('./aggregators/home-page')
function createConfig ({ env }) {
  // ...
  const homePageAggregator = createHomePageAggregator({
    db: knexClient,
    messageStore
  })
  const aggregators = [
    homePageAggregator,
  ]
  const components = [
  ]
  return {
    // ...
    homePageAggregator,
    aggregators,
    components,
  }
}

We start by requireing the Aggregator. Then inside of createConfig we instantiate it by passing it the db and messageStore reference that were instantiated ...