Practical Microservices

Correlators Gonna…Correlate?

Back to the Admin Portal application, let’s set up another route:

debugging-components/src/app/admin/index.js

function createAdminApplication ({ db, messageStoreDb }) {
  // ...
  router
    .route('/correlated-messages/:traceId')
    .get(handlers.handleCorrelatedMessagesIndex)
  // ...
  return {
    handlers,
    queries,
    router
  }
}

Okay, here’s the handlers.handleCorrelatedMessagesIndex handler:

debugging-components/src/app/admin/index.js

function createHandlers ({ queries }) {
  function handleCorrelatedMessagesIndex (req, res) {
    const traceId = req.params.traceId

    return queries
      .correlatedMessages(traceId)
      .then(messages =>
        res.render('admin/templates/messages-index', {
 messages, ...