Initialize the config before express app

Author: kabirbaidhya

.eslintrc.yml

@@ -8,7 +8,7 @@ parserOptions:
   sourceType: module
 
 extends: 'eslint:recommended'
-
+parser: babel-eslint
 rules:
   no-var: 2
   key-spacing: 2

src/app.js

@@ -0,0 +1,38 @@
+import cors from 'cors';
+import helmet from 'helmet';
+import morgan from 'morgan';
+import express from 'express';
+
+import pkg from '../package';
+import routes from './routes';
+import logger from './utils/logger';
+import bodyParser from 'body-parser';
+import compression from 'compression';
+import * as config from './config/config';
+import * as errorHandler from './middlewares/errorHandler';
+
+const app = express();
+
+app.set('port', config.get().restApi.port);
+
+app.locals.title = pkg.name;
+app.locals.version = pkg.version;
+
+app.use(cors());
+app.use(helmet());
+app.use(compression());
+app.use(morgan('dev'));
+app.use(bodyParser.json());
+
+// API Routes
+app.use('/api', routes);
+
+// Error Middlewares
+app.use(errorHandler.genericErrorHandler);
+app.use(errorHandler.notFoundError);
+
+app.listen(app.get('port'), () => {
+  logger().info(`Server listening is on port ${app.get('port')}`);
+});
+
+export default app;

src/index.js

@@ -1,40 +1,7 @@
 import 'babel-polyfill';
-import cors from 'cors';
-import helmet from 'helmet';
-import morgan from 'morgan';
-import express from 'express';
+import init from './init';
 
-import pkg from '../package';
-import routes from './routes';
-import logger from './utils/logger';
-import bodyParser from 'body-parser';
-import compression from 'compression';
-import * as errorHandler from './middlewares/errorHandler';
-
-const app = express();
-
-const PORT = process.env.PORT || '3000';
-
-app.set('port', PORT);
-
-app.locals.title = pkg.name;
-app.locals.version = pkg.version;
-
-app.use(cors());
-app.use(helmet());
-app.use(compression());
-app.use(morgan('dev'));
-app.use(bodyParser.json());
-
-// API Routes
-app.use('/api', routes);
-
-// Error Middlewares
-app.use(errorHandler.genericErrorHandler);
-app.use(errorHandler.notFoundError);
-
-app.listen(app.get('port'), () => {
-  logger().info(`Server listening is on port ${app.get('port')}`);
+init(() => {
+  import('./app');
 });
 
-export default app;

src/init.js

@@ -0,0 +1,24 @@
+import path from 'path';
+import pkg from '../package';
+
+/**
+ * Initialize the monitor and start monitoring configured services.
+ */
+export default async function init(callback) {
+  process.stdout.write(`Starting ${pkg.name} ${pkg.version}\n`);
+
+  try {
+    const { resolve, DEFAULT_FILENAME } = await import('./config/config');
+
+    // Config file for chill could be added using environment variables too.
+    const configFile = process.env.CHILL_CONFIG || path.resolve(DEFAULT_FILENAME);
+    const config = resolve(configFile);
+
+    callback(config);
+
+    return;
+    // Start the app
+  } catch (err) {
+    process.stderr.write('An error occurred: \n' + err);
+  }
+}