xhrPool - extendable async xml requests pool, with sequent callbacks per xhr

xhrpool.js

// xhrPool - async xml requests pool, with sequent callbacks per xhr
// 

    $.xhrPool = [];
    $.xhrPool.callbacks = [];
    $.xhrPool.starthandlers = []; 


 $.xhrPool.onEnd = function (name, obj, opts) {

        
        $.xhrPool = $.extend($.xhrPool, obj);
        $.xhrPool.callbacks.push({ 'fn': name, 'opts': opts });

    };

    $.xhrPool.onBegin = function (name, obj, opts) {


        $.xhrPool = $.extend($.xhrPool, obj);
        $.xhrPool.starthandlers.push({ 'fn': name, 'opts': opts });

    };


    $.xhrPool.flush = function () {
        $.xhrPool.callbacks = [];
        $.xhrPool.starthandlers = [];
        
    };

    $.xhrPool.abortAll = function () {
        $(this).each(function (idx, jqXhr) {

            jqXhr.abort();
        });

        $.xhrPool.length = 0;
    };



//usage 

   if (!$.xhrPool.OnException)
        $.xhrPool.onEnd('OnException', { 'OnException': function (jx, opts, pool) {

            if (jx.statusText == "abort") {

                $.xhrPool.empty();

                jx.exception = 'true';
              
                jx.error = function () { };
                jx.success = function () { };
                jx = null;
                           
            }

        }
        }, null);


    if (!$.xhrPool.StopLoadingSpinner)
        $.xhrPool.onEnd('StopLoadingSpinner', { 'StopLoadingSpinner': function (jx, opts, pool) {

        //    $("#content").spin(false);

        }
        }, null);


    if (!$.xhrPool.StartLoadingSpinner)
        $.xhrPool.onBegin('StartLoadingSpinner', { 'StartLoadingSpinner': function (jx, opts, pool) {

          //  $("#content").spin("ajaxload");

        }
        }, null);


    
   
    $.ajaxSetup({
        beforeSend: function (jqXhr) {

            if (!$.xhrPool) return;
            
            $.xhrPool.push(jqXhr);

            $($.xhrPool.starthandlers).each(function (e) {


                var fn = $.xhrPool.starthandlers[e].fn;
                var opts = $.xhrPool.starthandlers[e].opts;

                if (fn) {

                    var func = $.xhrPool[fn];
                    if (typeof (func) == 'function') func(jqXhr, $.extend(opts, $.xhrPool));
                }

            });

        }
    });

  $(document).ajaxComplete(function (jxhr) {
        if (!$.xhrPool) return;

        var index = $.xhrPool.indexOf(jxhr);
        if (index > -1) {
            $.xhrPool.splice(index, 1);
        }

        $($.xhrPool.callbacks).each(function (e) {


            var fn = $.xhrPool.callbacks[e].fn;
            var opts = $.xhrPool.callbacks[e].opts;

            if (fn) {


                var func = $.xhrPool[fn];
                if (typeof (func) == 'function') func(jxhr, $.extend(opts, $.xhrPool));
            }

        });

      
      
    });