Justin Vincent

Justin says:

It’s home grown. Not sure how much use it can be but here’s the code. At the very least you can use it to get a conceptual template for how it works.

var tm = 
{

	useAjaxQueue : true,
	ajaxRunning : false,
	ajaxQueue :[],
	ajaxLastRun : 0,
	ajaxMaxBlockMs: 1000,

	runAjaxQueue : function()
	{
		if ( tm.ajaxQueue.length > 0 )
		{
			var ajaxCall = tm.ajaxQueue.shift();
			tm.ajax
			(
				ajaxCall.sendVars,
				ajaxCall.callbackFunc,
				ajaxCall.statusMsg,
				ajaxCall.hideLoader
			);
		}
	},
	
	ajax : function ( sendVars, callbackFunc , statusMsg, hideLoader )
	{
		
		if ( tm.useAjaxQueue && tm.ajaxRunning )
		{
			if ( tm.timeStamp() - tm.ajaxLastRun >= tm.ajaxMaxBlockMs )
			{
				tm.trace('ajax: forcing queue override: '+sendVars.action,'locks'+sendVars.action);
			}
			else
			{
				tm.trace('ajax: queuing: '+sendVars.action,'locks'+sendVars.action);
				tm.ajaxQueue.push
				({
					sendVars : sendVars,
					callbackFunc : callbackFunc,
					statusMsg : statusMsg,
					hideLoader : hideLoader
				});
				return;
			}
		}
		
		tm.ajaxLastRun = tm.timeStamp();
		tm.trace('ajax: running: '+sendVars.action,sendVars.action);
		tm.trace(sendVars,sendVars.action);
		
		tm.ajaxRunning = true;
		
		$.post
		(
			// Always go via root
			"/",
			
			// Variables to send to the server
			sendVars,

			// Response from the server
			function(response, textStatus)
			{
				
				tm.trace('ajax: result: '+sendVars.action,sendVars.action+',running');
				tm.trace(response,sendVars.action);
				
				tm.ajaxRunning = false;
				
				if ( tm.useAjaxQueue )
				{
					setTimeout(function(){tm.runAjaxQueue();},0);
				}
				
				if ( typeof callbackFunc == 'function' )
				{
					callbackFunc(response);
				}
				else if ( callbackFunc !== undefined && callbackFunc !== false )
				{
					eval('tm.'+callbackFunc)(response);
				}
				
			}, 
			"json"
		);
		
	},

	timeStamp : function()
	{
		var date = new Date;
		var timeStamp = date.getTime();
		return timeStamp;
	}
}