openhim-core/src/middleware/retrieveTCPTransaction.js

The OpenHIM core application that provides logging and routing of http requests

import SDC from 'statsd-client'
import os from 'os'
import * as tcpAdapter from '../tcpAdapter'
import { config } from '../config'

const statsdServer = config.get('statsd')
const application = config.get('application')

const domain = `${os.hostname()}.${application.name}.appMetrics`
const sdc = new SDC(statsdServer)

export async function koaMiddleware (ctx, next) {
  let startTime
  if (statsdServer.enabled) { startTime = new Date() }
  // the body contains the key
  const transaction = tcpAdapter.popTransaction(ctx.body)

  ctx.body = transaction.data
  ctx.authorisedChannel = transaction.channel

  if (statsdServer.enabled) { sdc.timing(`${domain}.retrieveTCPTransactionMiddleware`, startTime) }
  await next()
}