Practical Microservices

Adding the Read Functions to the Message Store’s Interface

read and readLastMessage both sit inside a top-level dependency-receiving function that receives a db reference. Let’s open code/video-tutorials/src/message-store/index.js and pull these functions in:

video-tutorials/src/message-store/index.js

const createRead = require('./read')
const configureCreateSubscription = require('./subscribe')
// ...
function createMessageStore ({ db }) {
  // ...
  const read = createRead({ db })
  const createSubscription = configureCreateSubscription({
    read: read.read,
    readLastMessage: read.readLastMessage,
    write: write
  })
  return {
    // ...
    createSubscription,
    read: read.read,
 readLastMessage: read.readLastMessage, ...