IBM Developers Works has a tutorial on how to build an RSS reader using AJAX. The amount of code you need to write is scary (and this is not the complete code). Adobe Flex 2 plus a simple Java programming to support DB interaction allows you to achive the same functionality using A LOT LESS coding.Just take a look at this screen:
The Flex 2 code below populates the bottom portion of the screen with financial news based on the selected stock on top ( (it does not work with a DB to store the RSS source so it’d add some 50 lines of Java code ). The data come from the Yahoo! Finance RSS feed. The URL looks as follows: http://finance.yahoo.com/rss/headline?s=MSFT
The suffix can be MSFT or whatever is selected on top is being passed to the code below.
Flex object is used through a proxy deployed under Tomcat or any other servlet container.
The entire application code and its description can be found in this article.
<mx:Panel xmlns:mx="http://www.adobe.com/2006/mxml" title="News" width="100%" height="100%"�> <mx:DataGrid id="newsGrid" width="100%" height="100%" dataProvider="{newsFeed.lastResult.channel.item}"�variableRowHeight="true"> <mx:columns> <mx:DataGridColumn headerText="Date"�dataField="pubDate" width="200"/> <mx:DataGridColumn headerText="Title"�dataField="title"�wordWrap="true" /> <mx:DataGridColumn headerText="Description"�dataField="description"�wordWrap="true"�/> <mx:DataGridColumn headerText="Link"�width="130"> <mx:itemRenderer> <mx:Component> <mx:LinkButton label="{data.link}"�click="navigateToURL(new URLRequest(data.link), '_blank')"/> </mx:Component> </mx:itemRenderer> </mx:DataGridColumn> </mx:columns> </mx:DataGrid> <mx:HTTPService id="newsFeed" useProxy="true" destination="YahooFinancialNews"�concurrency="last" resultFormat="e4x" fault="onFault(event)"�> </mx:HTTPService> <mx:Script> <![CDATA[ import mx.utils.ObjectProxy; import mx.rpc.events.*; public function set security(value:String):void { this.title = "News: " + value; newsFeed.send({s:value}); } private function onFault(event:FaultEvent):void { mx.controls.Alert.show( "Destination:" + event.currentTarget.destination + "n" + "Fault code:" + event.fault.faultCode + "n" + "Detail:" + event.fault.faultDetail, "News feed failure" ); } ]]> </mx:Script> </mx:Panel>
[tags]Flex, Flex 2, RSS, AJAX[/tags]
Hi All Experts,
I want to use AJAX (Asynchronous JAVA script with XML ). How can i Optimize the site SEO.
as Java script and flash is not recommended by search engines. Any suggestion or help is welcomed. With Regards.