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Ajax Programming in BEA WebLogic Portal, Part 1
01/24/2006, By John Margaglione



Portal applications do an excellent job of surfacing information from multiple sources and providing application services to the portlets that comprise the portal Web application. To the user, the portlet applications are independent entities, similar to windowed applications on a desktop. Extending that analogy, what if taking an action in one windowed application caused the content in all other applications to be refreshed? That is the current state of most portals. Moving through a page flow in one portlet causes the entire Web page to be refreshed, including all other portlets on that page.

To combat this sometimes undesirable behavior, Web developers have employed what is referred to as Ajax-style programming. Ajax, or Asynchronous Java and XML, is a collection of technologies including XHTML, CSS, JavaScript, DOM, and the XmlHttpRequest object to create interactive Web applications. This article explains the rationale for using Ajax programming methods within the BEA WebLogic Portal environment, and offers some best practices and advice to avoid the many pitfalls awaiting the new Ajax programmer.

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