YUI Library Examples: DataTable Control: Polling the DataSource

DataTable Control: Polling the DataSource

This DataTable polls for data from its DataSource every 5 seconds. Due to browser limitations, implementers should use this feature to replace existing data, rather than continuously add data to the page.

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count	description	time
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1	At the tone the time will be:	12:22:48 PM

Sample Code for this Example

Data:


1	[{
2	count:n,
3	description:"At the tone the time will be: ",
4	time: "[hh]:[mm]:[ss] [AM\|PM]")
5	}]
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Markup:


1	<div id="polling"></div>
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JavaScript:


1	YAHOO.util.Event.addListener(window, "load", function() {
2	YAHOO.example.Polling = function() {
3	var counter = 0;
4	var dataIncrementer = function() {
5	counter++;
6	return [{
7	count:counter,
8	description:"At the tone the time will be: ",
9	time: YAHOO.util.Date.format(new Date(), {format:"%I:%M:%S %p"})
10	}];
11	};
12
13	var myColumnDefs = [
14	{key: "count"},
15	{key: "description"},
16	{key: "time"}
17	];
18
19	var myDataSource = new YAHOO.util.DataSource(dataIncrementer);
20	myDataSource.responseType = YAHOO.util.DataSource.TYPE_JSARRAY;
21	myDataSource.responseSchema = {
22	fields: ["count", "description", "time"]
23	};
24
25	var myDataTable = new YAHOO.widget.DataTable("polling",
26	myColumnDefs, myDataSource);
27
28	// Set up polling
29	var myCallback = {
30	success: myDataTable.onDataReturnInitializeTable,
31	failure: function() {
32	YAHOO.log("Polling failure", "error");
33	},
34	scope: myDataTable
35	};
36	myDataSource.setInterval(5000, null, myCallback);
37
38	return {
39	oDS: myDataSource,
40	oDT: myDataTable
41	};
42	}();
43	});
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YAHOO.util.Event.addListener(window, "load", function() {
    YAHOO.example.Polling = function() {
        var counter = 0;
        var dataIncrementer = function() {
            counter++;
            return [{
                count:counter, 
                description:"At the tone the time will be: ", 
                time: YAHOO.util.Date.format(new Date(), {format:"%I:%M:%S %p"})
            }];
        };

var myColumnDefs = [
            {key: "count"},
            {key: "description"},
            {key: "time"}
        ];

var myDataSource = new YAHOO.util.DataSource(dataIncrementer);
        myDataSource.responseType = YAHOO.util.DataSource.TYPE_JSARRAY;
        myDataSource.responseSchema = {
            fields: ["count", "description", "time"]
        };

Configuration for This Example

You can load the necessary JavaScript and CSS for this example from Yahoo's servers. Click here to load the YUI Dependency Configurator with all of this example's dependencies preconfigured.

YUI Library Examples: DataTable Control: Polling the DataSource

Sample Code for this Example

Configuration for This Example

YUI Logger Output:

DataTable Control Examples:

More DataTable Control Resources: