Lock run() if previous instance ran booting first.

.jshintrc

@@ -1,5 +1,6 @@
 {
     "node": true,
+    "esnext": true,
     "laxcomma": true,
     "unused": false,
     "undef": false,

lib/api/index.js

@@ -11,6 +11,7 @@
 module.exports = function(namespace, dependencies){
 
     var API         = require('booljs-api')
+    ,   ready       = require('readyness')
     ,   Folder      = require('./folder')
     ,   Config      = require('./configurations')
     ,   Loaders     = require('./loaders');
@@ -22,6 +23,7 @@ module.exports = function(namespace, dependencies){
     ,   _dbloader   = 'booljs-nomodel'
     ,   _srvloader  = 'booljs-express'
     ,   _booted     = false
+    ,   _booting    = false
     ,   _server     = null;
 
     return {
@@ -134,7 +136,7 @@ module.exports = function(namespace, dependencies){
             }
 
             // Reading components
-            return q.all(componentReaders).then(function () {
+            return q.all(componentReaders).then(() => {
                 done();
             }).catch(done);
         },
@@ -173,29 +175,40 @@ module.exports = function(namespace, dependencies){
          * @return {Promise}
          */
         run: function (done, progress) {
-            var context = this;
             done = done || function () {};
 
             if(_booted){
+                done({
+                    app: _instance.getComponents(),
+                    server: _server
+                });
                 return q.resolve({
                     app: _instance.getComponents(),
                     server: _server
                 });
+            } else if (_booting){
+                return q.nbind(ready.doWhen, ready)().then(() => {
+                    return this.run(done, progress);
+                });
             }
 
-            return context.
-                insertBoolError().
-            readConfigurations(undefined, progress).then(function () {
-                return context.readFiles(undefined, progress);
-            }).then(function () {
-                return context.loadComponents();
-            }).then(function () {
-                return context.loadDatabase();
-            }).then(function () {
-                return context.bootServer(done, progress);
+            _booting    = true;
+            var booted  = ready.waitFor('boot');
+
+            return (this.
+                insertBoolError()
+            ).readConfigurations(undefined, progress).then(() => {
+                return this.readFiles(undefined, progress);
+            }).then(() => {
+                return this.loadComponents();
+            }).then(() => {
+                return this.loadDatabase();
+            }).then(() => {
+                return this.bootServer(done, progress);
             }).then(function (server) {
                 _server = server;
                 _booted = true;
+                booted();
 
                 done(undefined, {
                     app: _instance.getComponents(),

package.json

@@ -1,6 +1,6 @@
 {
   "name": "bool.js",
-  "version": "0.3.4",
+  "version": "0.3.5",
   "description": "Bool MVC Framework - Bootstraping Unit",
   "main": "lib/index.js",
   "license": "GPL-3.0",
@@ -34,7 +34,8 @@
     "booljs-nomodel": "^0.2.1",
     "coffee-script": "^1.9.1",
     "cson": "^3.0.1",
-    "jsonfile": "^2.0.0"
+    "jsonfile": "^2.0.0",
+    "readyness": "^0.1.0"
   },
   "engines": {
     "node": ">=4.0.0"