Download Ajax in Oracle JDeveloper by Deepak Vohra PDF

By Deepak Vohra

ISBN-10: 3540775951

ISBN-13: 9783540775959

Asynchronous JavaScript and XML (Ajax) is an online approach used to move facts among a browser and server asynchronously with out posting the internet web page to the server. "Asynchronously" signifies that the processing of the net web page maintains whereas the Ajax request is shipped to the server and a reaction is got from the server. the net web page, or section(s) of the net web page, is refreshed with the Ajax reaction with out reposting the net web page. Ajax has the next benefits over non-Ajax internet applications.

- decreased reaction time and lowered server load, because the entire web content isn't really reposted.

- diminished bandwidth of internet purposes as purely info is transferred and the HTML layout is utilized within the browser.

- Separation of knowledge, layout and elegance.

The e-book covers internet seek and RSS Feed with Ajax in addition to shape validation with Ajax frameworks for Java, JSP, JSF, and Hypertext Preprocessor. It discusses utilizing Ajax in Oracle JDeveloper and is IDE dependent. JDeveloper has the next merits over Eclipse IDE.

- JDeveloper 11g offers an built-in JavaScript Editor for Ajax/Web improvement.

- It additionally presents a Hypertext Preprocessor extension.

- JDeveloper has a integrated help for JSF and for JDBC.

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Sample text

Specify the SID as ORCL. Click on Test Connection. If a JDBC connection gets established a “Success” message gets displayed. Click on OK as shown in Fig. 11. 2 Setting the Environment 27 Fig. 11 Configuring a Connection A node for the connection gets added to IDE Connections node in Databases window as shown in Fig. 12. The Catalog table may be modified if required using the SQL Worksheet. 28 2 Developing an Ajax Web Application Fig. 12 New Database Connection Connection AjaxConnection in Databases window is available as datasource with JNDI name jdbc/AjaxConnectionDS.

Updater. For example, update a validationMessage div periodically. 3 Installing Prototype We shall be using the same application that we developed in the previous chapter and add prototype functionality to the user interface. Download the latest version of prototype libray1. js to the public_html directory of the Ajax project in JDeveloper 11g. jsp as shown in Fig. 1. 4 Configuring Prototype in AJAX Web Application 51 Fig. jsp. jsp. js” type=”text/javascript”> In the Ajax application version without the prototype library, the catalogId field is retrieved with get getElementById() function and the value is retrieved with value attribute.

For example the validationMessage div is retrieved as follows. getElementById(“validationMessage”); Replace the getElementById() function with prototype function $(). var validationMessage=$('validationMessage'); In the non-prototype version an XMLHttpRequest object is created with the XMLHttpRequest constructor or the ActiveXObject constructor. The callback method is registered with the XMLHttpRequest object and the HTTP request sent to the server. The callback method is invoked when the request state changes and when the request is complete the HTTP response is processed.

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