Cumulus Support

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/**
 *	Simple example that shows how to encapsulate
 *	XMLHTTPRequestCalls
 *
 *	Original author Mike Chambers (mesh@adobe.com)
 *  Modded Mark Crossley for Cumulus
 */

/**
 *	Constructor for the class.
 *
 *	@param {String} dataURL The path to the data that the class
 *	will load (OPTIONAL)
 *
 *	@constructor
 */
function DataLoader(dataURL) {
	if (dataURL != undefined) {
		this._dataURL = dataURL;
	}
}

//where to load the data from
DataLoader.prototype._dataURL = "/realtime.txt";

//var to hold an instance of the XMLHTTPRequest object
DataLoader.prototype._request = undefined;


/**************** Public APIs **********************/

/**
 *	Tells the class to load its data and process the results.
 */
DataLoader.prototype.load = function () {
	//get a new XMLHTTPRequest and store it in an instance var.
	this._request = this._getXMLHTTPRequest();
	
	//set the var so we can scope the callback
	var _this = this;
	
	//callback will be an anonymous function that calls back into our class
	//this allows the call back in which we handle the response (_onData())
	// to have the correct scope.
	this._request.onreadystatechange = function () {
		_this._onData()
	};
	this._request.open("GET", this._generateDataUrl(), true);
	this._request.send(null);
}

/***************Private Data Loading Handlers*******************/

//return the URL from which the data will be loaded
DataLoader.prototype._generateDataUrl = function () {
	return this._dataURL;
}


//callback for when the data is loaded from the server
DataLoader.prototype._onData = function () {
	if (this._request.readyState == 4) {
	    //stop the timeout function
        clearTimeout(xmlHttpTimeout);

		if (this._request.status == "200") {
		
			if (this._generateDataUrl().indexOf("extra") == -1){
				//realtime.txt
				parseRealtime(this._request.responseText);
				g_realTimeReady = true;
			}else{
				//realtime-extras.txt
				parseRealtimeExtras(this._request.responseText);
				g_realTimeExtrasReady = true;
			}
			//if the onComplete callback has been defined
			//call it to let the listener know
			//that we are done creating the list
			if (this.onComplete != undefined) {
				this.onComplete();
			}
		} else {
			//check if an error callback handler has been defined
			if (this.onError != undefined) {
				//pass an object to the callback handler with info
				//about the error
				this.onError({
						status : this_request.status,
						statusText : this._request.statusText
					});
			}
		}
		
		//clean up
		delete this._request;
	}
}

/***************Private Data Util Functions ********************/

//returns an XMLHTTPRequest instance (based on browser)
DataLoader.prototype._getXMLHTTPRequest = function () {
	var xmlHttp;
	try {
		xmlHttp = new ActiveXObject("Msxml2.XMLHttp");
	} catch (e) {
		try {
			xmlHttp = new ActiveXObject("Microsoft.XMLHttp");
		} catch (e2) {}
	}
	
	if (xmlHttp == undefined && (typeof XMLHttpRequest != 'undefined')) {
		xmlHttp = new XMLHttpRequest();
	}
	
	return xmlHttp;
}
 
/*
	var dl = new DataLoader();
		dl.load();
*/

Code: Select all

var rawdata = $.ajax({url: "/data/realtime.txt",  async: false  }).responseText.split(' ');