Datasheet

You grab a Map of the deployed user attributes by getting that attribute from the PortletRequest.

Then, you simply look up the appropriate value; in this case, the user’s work e-mail (stored under

“user.business-info.online.email”).

User attributes are very important in deploying personalized portlet solutions. Be sure to familiarize

yourself with these attributes.

Portlet Tag Library

The Portlet JSP Tag Library gives developers the capability to reference Portal components from within a

JSP page. The following table explains the tags:

Tag Name Purpose

defineObjects This tag declares three objects within the JSP page: RenderRequest ren-

derRequest

, RenderResponse renderResponse, and PortletConfig

portletConfig

actionURL This tag builds action URLs that point to the current portlet. This tag is

nested with

param tags in order to pass the appropriate parameters in the

action URL.

renderURL This tag builds render URLs. It also is nested with param tags.

namespace This tag provides a unique name based on the current portlet in order to

avoid conflicts in variable and function names when all of the portlet frag-

ments are consolidated into a portal page.

param This tag gives the name and value of a parameter. It is nested inside either

the

actionURL or renderURL tags.

Portlet Deployment

This section describes the portlet application deployment descriptor (portlet.xml), by dissecting a

sample and explaining the various sections of the descriptor piece by piece.

Portlet Application Deployment Descriptor

In order to understand the portlet application deployment descriptor well, you should examine each part.

If you have used XML very much, you will find this first section unremarkable. The only thing worth

noting here is that the

version attribute is required to determine which version of the specification is in

effect.

<?xml version=”1.0” encoding=”UTF-8”?>

<portlet-app xmlns=”http://java.sun.com/xml/ns/portlet”

version=”1.0” xmlns:xsi=”http://www.w3.org/2001/XMLSchema-instance”

xsi:noNamespaceSchemaLocation=”http://java.sun.com/xml/ns/portlet-app_1_0.xsd”>

Chapter 1

04 469513 Ch01.qxd 1/16/04 11:04 AM Page 28