Handle shutdown for RedisCacheAdapter (#6658)

* Handle shutdown for RedisCacheAdapter

* connected value need to be tested in setTimeout

Co-authored-by: Promise Xu <promise@klido.me>

src/ParseServer.js

@@ -85,7 +85,7 @@ class ParseServer {
           serverStartComplete();
         }
       })
-      .catch(error => {
+      .catch((error) => {
         if (serverStartComplete) {
           serverStartComplete(error);
         } else {
@@ -126,6 +126,10 @@ class ParseServer {
     if (fileAdapter && typeof fileAdapter.handleShutdown === 'function') {
       promises.push(fileAdapter.handleShutdown());
     }
+    const { adapter: cacheAdapter } = this.config.cacheController;
+    if (cacheAdapter && typeof cacheAdapter.handleShutdown === 'function') {
+      promises.push(cacheAdapter.handleShutdown());
+    }
     return (promises.length > 0
       ? Promise.all(promises)
       : Promise.resolve()
@@ -154,7 +158,7 @@ class ParseServer {
       })
     );
 
-    api.use('/health', function(req, res) {
+    api.use('/health', function (req, res) {
       res.json({
         status: 'ok',
       });
@@ -179,7 +183,7 @@ class ParseServer {
     if (!process.env.TESTING) {
       //This causes tests to spew some useless warnings, so disable in test
       /* istanbul ignore next */
-      process.on('uncaughtException', err => {
+      process.on('uncaughtException', (err) => {
         if (err.code === 'EADDRINUSE') {
           // user-friendly message for this common error
           process.stderr.write(
@@ -192,7 +196,7 @@ class ParseServer {
       });
       // verify the server url after a 'mount' event is received
       /* istanbul ignore next */
-      api.on('mount', function() {
+      api.on('mount', function () {
         ParseServer.verifyServerUrl();
       });
     }
@@ -334,8 +338,8 @@ class ParseServer {
     if (Parse.serverURL) {
       const request = require('./request');
       request({ url: Parse.serverURL.replace(/\/$/, '') + '/health' })
-        .catch(response => response)
-        .then(response => {
+        .catch((response) => response)
+        .then((response) => {
           const json = response.data || null;
           if (
             response.status !== 200 ||
@@ -368,7 +372,7 @@ function addParseCloud() {
 }
 
 function injectDefaults(options: ParseServerOptions) {
-  Object.keys(defaults).forEach(key => {
+  Object.keys(defaults).forEach((key) => {
     if (!Object.prototype.hasOwnProperty.call(options, key)) {
       options[key] = defaults[key];
     }
@@ -424,12 +428,12 @@ function injectDefaults(options: ParseServerOptions) {
   }
 
   // Merge protectedFields options with defaults.
-  Object.keys(defaults.protectedFields).forEach(c => {
+  Object.keys(defaults.protectedFields).forEach((c) => {
     const cur = options.protectedFields[c];
     if (!cur) {
       options.protectedFields[c] = defaults.protectedFields[c];
     } else {
-      Object.keys(defaults.protectedFields[c]).forEach(r => {
+      Object.keys(defaults.protectedFields[c]).forEach((r) => {
         const unq = new Set([
           ...(options.protectedFields[c][r] || []),
           ...defaults.protectedFields[c][r],
@@ -453,7 +457,7 @@ function configureListeners(parseServer) {
   const sockets = {};
   /* Currently, express doesn't shut down immediately after receiving SIGINT/SIGTERM if it has client connections that haven't timed out. (This is a known issue with node - https://github.com/nodejs/node/issues/2642)
     This function, along with `destroyAliveConnections()`, intend to fix this behavior such that parse server will close all open connections and initiate the shutdown process as soon as it receives a SIGINT/SIGTERM signal. */
-  server.on('connection', socket => {
+  server.on('connection', (socket) => {
     const socketId = socket.remoteAddress + ':' + socket.remotePort;
     sockets[socketId] = socket;
     socket.on('close', () => {
@@ -461,7 +465,7 @@ function configureListeners(parseServer) {
     });
   });
 
-  const destroyAliveConnections = function() {
+  const destroyAliveConnections = function () {
     for (const socketId in sockets) {
       try {
         sockets[socketId].destroy();
@@ -471,7 +475,7 @@ function configureListeners(parseServer) {
     }
   };
 
-  const handleShutdown = function() {
+  const handleShutdown = function () {
     process.stdout.write('Termination signal received. Shutting down.');
     destroyAliveConnections();
     server.close();