Code files

Chapter10/standardizing-service-boilerplate/micro-pattern-routing/adderservice/wiring.js

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+'use strict'
+
+const net = require('net')
+const nos = require('net-object-stream')
+const through = require('through2')
+const pump = require('pump')
+const bloomrun = require('bloomrun')
+
+const { ADDERSERVICE_SERVICE_PORT } = process.env
+
+module.exports = wiring 
+
+function wiring (service) {
+  const patterns = createPatternRoutes(service)
+  const matcher = createMatcherStream(patterns)
+
+  const server = net.createServer((socket) => {
+    socket = nos(socket)
+    pump(socket, matcher, socket, failure)
+  })
+
+  server.listen(ADDERSERVICE_SERVICE_PORT, '0.0.0.0', () => {
+    console.log('server listening at', ADDERSERVICE_SERVICE_PORT)
+  })
+}
+
+function createPatternRoutes (service) {
+  const patterns = bloomrun()
+
+  patterns.add({role: 'adder', cmd: 'add'}, service.add)
+
+  return patterns
+}
+
+function createMatcherStream (patterns) {
+  return through.obj((object, enc, cb) => {
+    const match = patterns.lookup(object)
+    if (match === null) {
+      cb()
+      return
+    }
+    match(object, (err, data) => {
+      if (err) {
+        cb(null, {status: 'error', err: err})
+        return
+      }
+      cb(null, data)
+    })
+  })
+}
+
+function failure (err) {
+  if (err) console.error('Server error', err)
+  else console.error('Stream pipeline ended')
+}