Download Ajax in Oracle JDeveloper by Deepak Vohra PDF

By Deepak Vohra

Asynchronous JavaScript and XML (Ajax) is an internet approach used to move facts among a browser and server asynchronously with out posting the internet web page to the server. "Asynchronously" means 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 internet web page, is refreshed with the Ajax reaction with no reposting the internet web page. Ajax has the subsequent benefits over non-Ajax net applications.

- diminished reaction time and decreased server load, because the whole online page isn't really reposted.

- lowered bandwidth of internet purposes as in basic terms info is transferred and the HTML structure is utilized within the browser.

- Separation of information, layout and elegance.

The booklet 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 subsequent benefits 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 aid for JSF and for JDBC.

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Additional info for Ajax in Oracle JDeveloper

Example text

Request( url, {method: 'get', parameters: pars, onComplete: showResponse}); 48 3 Less JavaScript with Prototype The url specifies the servlet url to which the request is sent. The options are specified as a JSON; the method property specifies that the request be sent using HTTP GET method; the default method is POST. The method value (get/post) is required to be specified in lowercase. The parameters property specifies the parameters to be sent with the url. The onComplete property specifies the function to be invoked when the request is complete.

The onComplete property represents the state when all of the response has been recieved. The onComplete property function, or a property function representing some other state of the request, is invoked by an argument containing the XMLHttpRequest object and another argument containing the response HTTP header. 1. 1 AjaxRequest Options Property method parameters asynchronous postBody requestHeaders onLoading, onLoaded, onInteractive, onComplete Description Specifies method of HTTP request. Default value is ‘post’.

5 Processing an Ajax Response In this section the Ajax XML response is retrieved and the input web page updated to indicate the validity of the Catalog Id value and the input fields are autocompleted if the Catalog Id is not valid. If the readyState property value is 4, which corresponds to a completed XMLHttpRequest, and the status property value is 200, which corresponds to HTTP status “OK”, the processResponse() function gets invoked. In the processResponse function, obtain the value for the responseXML property.

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