Kevin Beddingfield chumpy

Queue RPC Requests in GWT

The Problem

One of the handier tools in the GWT toolbox is a built in AJAX framework referred to as RPC or Remote Procedure Calls. Here’s the thing: Internet Explorer version 7 and prior is not awesome. IE pre-8 restricts the number of simultaneous XmlHttp requests to two for a given host. In most cases, this restriction doesn’t pose a real problem. For a rich client application (like the kind GWT is a good choice for) that may be leaving one of those two allowable connections open for a long poll while

	UserAgent userAgent = UserAgent.parseUserAgentString((String)request.getHeader("User-Agent"));
	String browser = userAgent.getBrowser.getName();
	String os = userAgent.getOperatingSystem().getName();