Better cluster editing.

Refactoring to prep for increased flexibility.

app.js

@@ -8,22 +8,28 @@ const path = require('path');
 const cookieParser = require('cookie-parser');
 const logger = require('morgan');
 const query = require('./query')
+const { buildEscape } = require('./safely-exit')
 
 const config = readConfig()
 console.log('CONFIG', config)
 
-const buildCluster = clusterConfig => {
+const c = object => {
+  console.log(object)
+  return object
+}
+
+const buildCluster = (clusterConfig, connect = true) => {
   const kafkaConfig = {...clusterConfig}
   delete kafkaConfig.clusterName
 
   const kafka = new Kafka(kafkaConfig)
   const admin = kafka.admin()
   admin.connect().catch(console.error)
-  return {
+  return c({
     kafka,
     admin,
     config: clusterConfig
-  }
+  })
 }
 
 const clusters =
@@ -42,10 +48,6 @@ app.use(express.urlencoded({ extended: false }));
 app.use(cookieParser());
 app.use(express.static(path.join(__dirname, 'public')));
 
-const consumers = new Map()
-
-require('./safely-exit')(consumers, clusters)
-
 const router = express.Router()
 
 /* GET topics listing. */
@@ -62,18 +64,35 @@ router.get('/topics/:cluster', async (req, res, _next) => {
 
 const passwordPlaceholder = 'XXXXXXXXXXXXXXXXXXXXXXXXXXXX'
 
-router.get('/clusters', async (req, res, _next) => {
-  res.send(Object.fromEntries(
+const getClusterData = () =>
+  Object.fromEntries(
     Object.entries(clusters).map(([key, value]) => {
       value = JSON.parse(JSON.stringify(value))
       value.config.sasl.password = passwordPlaceholder
       return [key, value.config]
-    })))
+    }))
+
+router.get('/clusters', async (req, res, _next) => {
+  res.send(getClusterData())
 })
 
 router.post('/clusters', async (req, res, _next) => {
   console.log('/clusters post body', req.body)
-  res.send('')
+  const clusterName = req.body.clusterName
+  config.clusters[clusterName] = req.body
+  clusters[clusterName] = buildCluster(req.body)
+  res.send(getClusterData())
+  await storeConfig(config)
+})
+
+router.post('/clusters/delete', async (req, res, _next) => {
+  console.log('/clusters/delete post body', req.body)
+  const clusterName = req.body.clusterName
+  // TODO: Disconnect
+  delete clusters[clusterName]
+  delete config.clusters[clusterName]
+  await storeConfig(config)
+  res.send(getClusterData())
 })
 
 router.put('/clusters', async (req, res, _next) => {
@@ -88,14 +107,15 @@ router.put('/clusters', async (req, res, _next) => {
   config.clusters[clusterName] = req.body
   clusters[clusterName] = buildCluster(req.body)
   res.send('')
+  //res.send(getClusterData())
   await storeConfig(config)
 })
 
 app.use(router)
 
-const realTimeSearch = async ({ cluster, searchCode, immutable, socket, topic }) => {
-  return query.realTimeMessageSearch({
-    kafka: clusters[cluster].kafka,
+const realTimeSearch = async ({ kafka, searchCode, immutable, socket, topic }) =>
+  query.realTimeMessageSearch({
+    kafka,
     topic,
     searchCode,
     immutable,
@@ -106,11 +126,10 @@ const realTimeSearch = async ({ cluster, searchCode, immutable, socket, topic })
       }))
     }
   })
-}
 
-const search = async ({ cluster, searchCode, immutable, socket, topic, maxItems }) => {
-  return query.searchMessages({
-    kafka: clusters[cluster].kafka,
+const search = async ({ kafka, searchCode, immutable, socket, topic, maxItems }) =>
+  query.searchMessages({
+    kafka,
     topic,
     maxItems,
     searchCode,
@@ -129,12 +148,15 @@ const search = async ({ cluster, searchCode, immutable, socket, topic, maxItems
       }))
     }
   })
-}
 
 const wsServer = new ws.WebSocketServer({
   noServer: true
 })
 
+const consumers = new Map()
+
+buildEscape(consumers, clusters)
+
 wsServer.on('connection', socket => {
   socket.on('close', async () => {
     await killConsumer(consumers.get(socket))
@@ -146,8 +168,12 @@ wsServer.on('connection', socket => {
     message = JSON.parse(message)
 
     const currentMode = message.mode === 'realTime' ? realTimeSearch : search
+    console.log('CLUSTERS before run', clusters)
+    console.log('message.cluster', message.cluster)
+    const cluster = clusters[message.cluster]
+    console.log('clusters[message.cluster]', cluster)
     const run = async () => consumers.set(socket, await currentMode({
-      cluster: clusters[message.cluster].kafka,
+      kafka: cluster.kafka,
       searchCode: message.searchCode,
       immutable: message.immutable,
       topic: message.topic,
@@ -159,7 +185,7 @@ wsServer.on('connection', socket => {
       console.error('run() error occurred!', e.toString())
       await killConsumer(consumers.get(socket))
       // Try again ONCE on failure
-      run().catch(e => socket.send('ERROR: ' + e))
+      run().catch(ee => socket.send('ERROR: ' + ee))
     })
   })
 })

clusters.js

@@ -0,0 +1,2 @@
+const { readConfig, storeConfig } = require('./config')
+const config = readConfig()

safely-exit.js

@@ -1,40 +1,40 @@
 const errorTypes = ['unhandledRejection', 'uncaughtException']
 const signalTraps = ['SIGTERM', 'SIGINT', 'SIGUSR2']
 
-const disconnectAll = async () => {
-  await Promise.all(Object.values(clusters).map(async cluster => cluster.admin.disconnect()))
-  await Promise.all(
-    Array.from(consumers.values())
-    .map(async consumer => consumer.disconnect()))
+const disconnectAll = async (consumers, clusters) => {
+  await Promise.all([
+    ...Object.values(clusters).map(async cluster => cluster.admin.disconnect()),
+    ...Array.from(consumers.values()).map(async consumer => consumer.disconnect())
+  ])
 }
 
-errorTypes.map(type => {
-  process.on(type, async e => {
-    try {
-      console.log(`process.on ${type}`)
-      console.error(e)
-      await disconnectAll()
-      process.exit(0)
-    } catch (_) {
-      process.exit(1)
-    }
+const buildEscape = (consumers, clusters) => {
+  const disconnect = async () => disconnectAll(consumers, clusters)
+  errorTypes.map(type => {
+    process.on(type, async e => {
+      try {
+        console.log(`process.on ${type}`)
+        console.error(e)
+        await disconnect()
+        process.exit(0)
+      } catch (_) {
+        process.exit(1)
+      }
+    })
   })
-})
 
-signalTraps.map(type => {
-  process.once(type, async () => {
-    try {
-      console.log('signalTrap: ' + type)
-      await disconnectAll()
-    } finally {
-      process.kill(process.pid, type)
-    }
+  signalTraps.map(type => {
+    process.once(type, async () => {
+      try {
+        console.log('signalTrap: ' + type)
+        await disconnect()
+      } finally {
+        process.kill(process.pid, type)
+      }
+    })
   })
-})
-
-let consumers
-let clusters
-module.exports = (consumerMap, clusterObject) => {
-  consumers = consumerMap
-  clusters = clusterObject
+}
+
+module.exports = {
+  buildEscape
 }