Practical Microservices

Adding the Component

The code for send-email will go in code/video-tutorials/src/components/send-email. Let’s begin with the top-level function of send-email:

video-tutorials/src/components/send-email/index.js

const createSend = require('./send')
function build ({
  messageStore,
  systemSenderEmailAddress,
  transport
}) {
  const justSendIt = createSend({ transport })
  const handlers = createHandlers({
    messageStore,
    justSendIt,
    systemSenderEmailAddress
  })
  const subscription = messageStore.createSubscription({
    streamName: 'sendEmail:command',
    handlers,
    subscriberId: 'components:send-email'
  })

  function start () {
    subscription.start()
  }

  return {
    handlers,
    start
  }
}

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