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If you want to monitor the download progress and completion status, you can wire up the appropriate event handlers. Here s an example:

In this chapter, we discussed common Lucene concepts, along with the necessity of building the indexer and the search tools for the Lucene API. We created an indexer class that uses the HTMLDocument class from the Lucene demo to parse HTML files into Lucene documents. The SearchPortlet searches the Lucene index our indexer created, and displays the results in a maximized portlet. When the user selects a result, we retrieve the content and display it in the portlet, for a consistent user experience. This chapter should give you a start on adding search to your portal. Portal search is usually integrated with a content management system. We cover content management integration with the portal in 15.

Returns a concatenated string Returns true if the string starts with the specified letters Returns true if the string contains the specified string Returns part of the specified string Returns the number of characters in the string Replaces characters from a string with the specified characters

downloader.addEventListener("downloadProgressChanged", "handleDLProgress"); downloader.addEventListener("completed", "handleDLComplete");

B ECAUSE A PORTLET IS generally a minor part of a larger application (the portal), most of the time it will have a strictly limited canvas on which to present its information. So it is vital that the portlet should make the best possible use of this. A portlet can acquire a considerable body of information with which to tailor its contents to specific users, and in this chapter we discuss how to take advantage of that.

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Everybody wants to be remembered. The portlet specification makes allowance for this by suggesting that portals should acquire and then provide to their portlets a set of personal information. This is provided to the portlet in the PortletRequest so that it is available to render and action methods. No mechanism is provided to the portlet to alter this information it is under the direct control of the portlet container. The idea is that a portlet will be able to greet users by name and access their personal information silently to avoid the need for tedious form filling. For example, an e-commerce portlet might select the user s home address from the user attributes when dispatching an order. An e-mail portlet would probably make use of the name information.

Now you can implement these handlers:

Several different levels can be looked at for integrating the user interface of different portlets Of course, not all portlets are going to be developed in-house, and for those portlets provided without source code, it will be difficult to customize the functionality without paying a third party Most portlets will use the easily customizable JSP as the presentation layer technology The first and easiest layer of the portal user interface to integrate is the styles used to display the HTML in the portal page We can create a consistent look and feel across all portlets by using the same Cascading Style Sheet (CSS) in all of the portlets All portlets will share the same fonts, colors, text sizes, and other display elements of rendered HTML The portal should provide a CSS style sheet that includes all of the standard portlet styles For a complete list of these styles, see 12.

Converts the specified string to its equivalent number Returns the sum of numbers Returns a number rounded down to the next integer Returns a number rounded up to the next integer Returns a number rounded to the nearest integer

function handleDLProgress(sender, args) { var ctrl = sender.getHost(); var t1 = ctrl.content.findName("txt1"); var v = sender.downloadProgress * 100; t1.Text = v + "%"; } function handleDLComplete(sender, args) { alert("Download complete"); }