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Who This Book Is For
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This book is for developers who already have a command of the basics of web application development in Java. Ideally, you will have had some exposure to servlets and JSP pages. No prior knowledge of portlets or portal development is required. Some very basic knowledge of XML is useful. All of our examples use standards or use open source software, so it will not be necessary for you to purchase any software to get started with portlet development. Because the portlet API is a standard, you can begin development on a free, open source portal, and then migrate your applications to a commercial portal. This book is not an academic text our focus is on providing extensive examples and taking a pragmatic approach to the technology that it covers.
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How This Book Is Organized
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We realize that many of our readers will be familiar with servlets and some of the core concepts of portlets when they come to this book. We recommend to such
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Introduction
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readers that they familiarize themselves with the following chapter guide so that they can quickly refer to the subjects they are interested in. We have also tried to ensure that a portlet novice will find that these chapters are logically ordered, with the more advanced subjects covered only when the basics have been described in detail. You will find the source code for the book s examples on the Apress web site (www.apress.com), on the Downloads page.
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1: Introduction to Portals and Portlets
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This chapter outlines the basic concepts and terms that you will encounter in the book. We talk in broad terms about the strengths and weaknesses of portlets, and we give you an overview of some of the technologies that we cover more fully in later chapters.
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2: Portlet Basics
This chapter provides an example of a simple portlet, discusses how it works, and demonstrates how to build the application. We then introduce the open source Pluto portal and show how you can deploy the example portlet on Pluto.
3: The Portlet Life Cycle
In this chapter, we discuss how a portlet interacts with a portal, from initialization to removal. We provide a simple example that walks you through the stages of the portlet life cycle, as well as a more complex example that illustrates the issues of multithreaded portlet applications.
4: Portlet Concepts
This chapter introduces many of the basic portlet concepts for the first time, or in more detail, and much of the API is examined in depth. An example ties many of these concepts together to demonstrate file upload to a portlet. Among many other topics, the chapter discusses Request and response objects Attributes and properties The portlet context
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Introduction
Locales and internationalization Logging The API versioning scheme Sessions Default and custom modes Default and custom window states
5: Using Servlets and JavaServer Pages with Portlets
5 demonstrates how to invoke and include content from servlets and JSP pages. Session management, the creation and processing of HTML forms, and the portlet tag library are all addressed. We provide an example of a to-do list portlet to illustrate these techniques.
6: Packaging and Deployment Descriptors
In this chapter, we show you how to use the portlet deployment descriptor. We also demonstrate XDoclet s portlet integration, which lets us build and deploy portlets easily.
7: Portal and Portlet Configuration
This chapter describes the standard configuration information available to a portal and the portlets it contains. It discusses The PortalContext class Portal properties Window states and portlet modes configuration The PortletConfig class Portlet preferences
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Introduction
8: Security and Single Sign-On
This chapter demonstrates how to integrate a portlet with a Single Sign-On solution using Kerberos as an example. We also discuss many of the other authentication and authorization technologies that are available to a portlet developer.
9: RSS and Syndication
You ll learn how a portlet can incorporate syndicated links from other sites and how an application can present its own links to similarly capable external sites.
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