Jxck · January 30, 2011 07:13 · Dec 14, 2010
diff --git a/paralell.js b/paralell.js
@@ -0,0 +1,38 @@
+/***
+ * @function make the parallel request filters and finish with the last filter.
+ *
+ * @example
+ *
+ * misc.parallel(
+ *    func1, func2, func3, func4
+ * );
+ *
+ * func1 ---+
+ *          |
+ * func2 ---+---> func4
+ *          |
+ * func3 ---+
+ *
+ * all the filter functions takes 3 arguments (request, response, next)
+ * as usual as Express way.
+ */
+exports.parallel = function(){
+   var list = arguments;
+   return function(req, res, next){
+      var current = 0;
+      var len = list.length;
+      var last = list[len-1];
+      function pass(i){
+         return function(){
+            current += 1;
+            if( current == len - 1 ){
+               last(req, res, next);
+            }
+         };
+      }
+      for(var i=0; i<len-1;i++){
+         var fun = list[i];
+         fun(req, res, pass(i));
+      }
+   };
+}