Redis made necessary in cluster mode: Abe has become a stateful app

package.json

@@ -72,6 +72,7 @@
     "prettyjson": "^1.1.3",
     "prompt": "^1.0.0",
     "qs": "^6.0.1",
+    "redis": "^2.6.2",
     "request": "^2.69.0",
     "watch": "^0.17.1",
     "xss": "^0.2.10"

src/cli/config/abe-config.js

@@ -96,7 +96,12 @@ var config = {
   partials: 'templates/partials',
   custom: 'custom',
   siteUrl: false,
-  sitePort: false
+  sitePort: false,
+  redis: {
+    enable: true,
+    port: '6379',
+    host:'127.0.0.1'
+  }
 }
 
 export default config

src/cli/models/Manager.js

@@ -11,6 +11,8 @@ import {
   getSelectTemplateKeys
 } from '../../cli'
 
+import * as redis from '../services/RedisClient';
+
 let singleton = Symbol()
 let singletonEnforcer = Symbol()
 
@@ -32,15 +34,15 @@ class Manager {
   }
 
   getList() {
+    if(config.redis.enable){
+      redis.get().get('list', function(err, reply) {
+        this._list = JSON.parse(reply);
+      });
+    }
 
     return this._list
   }
 
-  setList(list) {
-
-    this._list = list
-  }
-
   init() {
     var p = new Promise((resolve, reject) => {
       this._loadTime = new TimeMesure('Loading Manager')
@@ -60,13 +62,13 @@ class Manager {
   }
 
   updateList() {
-
     this._list = FileParser.getAllFilesWithKeys(this._whereKeys)
+    this._list.sort(FileParser.predicatBy('date'))
+    if(config.redis.enable){
+      redis.get().set('list', JSON.stringify(this._list))
+    }
     this._loadTime.duration()
 
-    // this._list = FileParser.getAllFiles(useKeys)
-    // this._list.sort(FileParser.predicatBy('date'))
-
     return this
   }
 

src/cli/services/RedisClient.js

@@ -0,0 +1,19 @@
+import redis from 'redis'
+
+var state = {
+  db: null,
+}
+
+export function connect(port, host) {
+  state.db = redis.createClient(port, host);
+  state.db.on('connect', function() {
+      console.log('connected to Redis');
+  });
+  state.db.on('error', function(err) {
+      console.log('Error connecting to Redis:' + err);
+  });
+}
+
+export function get() {
+  return state.db
+}

src/server/app.js

@@ -40,6 +40,8 @@ import {
   middleWebsite,
 } from './middlewares'
 
+import * as redis from '../cli/services/RedisClient';
+
 var abePort = null
 
 if(process.env.ROOT) config.set({root: process.env.ROOT.replace(/\/$/, '') + '/'})
@@ -80,6 +82,10 @@ var html = exphbs.create({
 
   var app = express(opts)
 
+  if(config.redis.enable){
+    redis.connect(config.redis.port, config.redis.host)
+  }
+
   // Instantiate Singleton Manager (which lists all blog files)
   Manager.instance.init();
   app.set('config', config.getConfigByWebsite());