added basic CLS support with re-entrant transactions

src/app.js

@@ -9,6 +9,7 @@ const session = require('express-session');
 const FileStore = require('session-file-store')(session);
 const os = require('os');
 const sessionSecret = require('./services/session_secret');
+const cls = require('./services/cls');
 
 const app = express();
 
@@ -23,6 +24,17 @@ app.use((req, res, next) => {
     next();
 });
 
+app.use((req, res, next) => {
+    cls.namespace.bindEmitter(req);
+    cls.namespace.bindEmitter(res);
+
+    cls.init(() => {
+        cls.namespace.set("Hi");
+
+        next();
+    });
+});
+
 app.use(bodyParser.json({limit: '50mb'}));
 app.use(bodyParser.urlencoded({extended: false}));
 app.use(cookieParser());