async loop

loop.js

_checkBackgroundTasks: function() {
        var instance = this;
 
        Liferay.Service(
                '/backgroundtask/get-background-tasks-count',
                {
                        groupId: instance._groupId,
                        taskExecutorClassName: instance._taskExecutorClassName,
                        completed: instance._isPending
                },
                function(obj) {
                        var warningMessageEl = A.oneNS(instance._namespace, '#warningMessageEl');
 
                        if (obj <= 0) {
                                if (warningMessageEl) {
                                        warningMessageEl.show();
                                }
 
                                instance._stagingLink.hide();
 
                                if (!instance._timeout) {
                                        instance._timeout = setTimeout(instance._checkBackgroundTasks 10000);
                                }
                        }
                        else {
                                if (warningMessageEl){
                                        warningMessageEl.hide();
                                }
 
                                instance._stagingLink.show();
 
                                instance._timeout.cancel();
                        }
                }
        );
}
};