YUI Library Examples: Connection Manager: Connection Manager Transaction Timeout

Setting Transaction Timeouts with Connection Manager

The following code example provides a step-by-step approach to presetting a transaction timeout.

Source file and dependencies

Load the Yahoo Global Object and Connection Manager source files:


1	<script src="yahoo.js"></script>
2	<script src="event.js"></script>
3	<script src="connection.js"></script>
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The Callback Object

The callback object includes a timeout property that allows you to specify the amount of time you're willing to wait for a transaction to complete before aborting. To cause a transaction to automatically timeout, the timeout property must be defined wih a value in millseconds. This example defines timeout with a value of 5000(milliseconds). If the transaction is not complete within 5000ms, it will be aborted.


1	var handleSuccess = function(o){
2	if(o.responseText !== undefined){
3	div.innerHTML = "Transaction id: " + o.tId;
4	div.innerHTML += "HTTP status: " + o.status;
5	div.innerHTML += "Server response: " + o.responseText;
6	div.innerHTML += "Argument object: property foo = " + o.argument.foo +
7	"and property bar = " + o.argument.bar;
8	}
9	}
10
11	var handleFailure = function(o){
12	div.innerHTML += "<li>Transaction id: " + o.tId + "</li>";
13	div.innerHTML += "<li>HTTP status: " + o.status + "</li>";
14	div.innerHTML += "<li>Status code message: " + o.statusText + "</li>";
15	}
16
17	var callback =
18	{
19	success:handleSuccess,
20	failure: handleFailure,
21	argument: { foo:"foo", bar:"bar" },
22	timeout: 1500
23	};
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Initiate the Transaction

Call YAHOO.util.Connect.asyncRequest to send the request to sync.php. The PHP script will return a string message after a random delay of 0 to 10 seconds if the transaction was not aborted. If the transaction was successfully aborted, the response object's status property will report -1 and the statusText property will report "transaction aborted".


1	var sUrl = "php/sync.php";
2	var request = YAHOO.util.Connect.asyncRequest('GET', sUrl, callback);
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YUI Library Examples: Connection Manager: Connection Manager Transaction Timeout

Setting Transaction Timeouts with Connection Manager

Source file and dependencies

The Callback Object

Initiate the Transaction

YUI Logger Output:

Connection Manager Examples:

More Connection Manager Resources: