Portals and portlets

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Portals and portlets

• Sean C. Sullivan
• October 24, 2006
• Portland Java Users Group

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Overview

• Portals
• Portal servers
• Java Portlets
• Portlet programming
• Portlet deployment
• Demo

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What is a portal?

• A portal is a web based application that ...
  provides personalization, authentication, content
  aggregation from different sources and hosts the
  presentation layer of information systems

source Java Portlet 2.0 specification
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Portal servers

• Liferay
• JBoss Portal
• Apache JetSpeed 2
• Apache Pluto
• eXo platform
• uPortal

• IBM Websphere Portal
• BEA WebLogic Portal
• Sun Portal Server
• Oracle Portal

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Portal server features

• personalization
• single sign-on
• security users, groups, roles
• portlet admin deploy, undeploy
• page layout
• pre-built portlets

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Liferay portal demo

• http//demo.liferay.net/

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Portlet fragments

• The content generated by a portlet is also called
  a fragment. A fragment is a piece of markup (e.g.
  HTML, XHTML, WML) adhering to certain rules and
  can be aggregated with other fragments to form a
  complete document. The content of a portlet is
  normally aggregated with the content of other
  portlets to form the portal page.

source Java Portlet 2.0 specification
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Java Portlet specifications

• Portlet 1.0
• JSR-168
• Portlet 2.0
• JSR-286

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Java Portlet API

• javax.portlet.Portlet
• javax.portlet.GenericPortlet
• javax.portlet.ActionRequest
• javax.portlet.ActionResponse
• javax.portlet.RenderRequest
• javax.portlet.RenderResponse

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javax.portlet.Portlet

• public void destroy()
• public void init(PortletConfig cfg)
• public void processAction(ActionRequest,
  ActionResponse)
• public void render(RenderRequest, RenderResponse)

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javax.portlet.GenericPortlet

• protected void doView(...)
• protected void doEdit(...)
• protected void doHelp(...)
• protected void processAction(...)

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Hello World Portlet

• public class HelloWorldPortlet
• extends javax.portlet.GenericPortlet
• public void doView(RenderRequest req,
• RenderResponse resp)
• resp.setContentType("text/html")
• PrintWriter w resp.getWriter()
• w.println("Hello world")

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JBoss Portal demo

• http//portal.demo.jboss.com/

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Portlet requests

1. Action requests
2. Render requests

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Portlet modes

• javax.portlet.PortletMode
• EDIT
• VIEW
• HELP

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Portlet window states

• javax.portlet.WindowState
• MAXIMIZED
• MINIMIZED
• NORMAL

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Portlet deployment

• WAR
• web.xml
• portlet.xml

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What's new in Java Portlet 2.0?

• Resource serving
• Events
• Portlet filters
• alignment with WSRP 2.0

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Additional topics

• Caching
• CSS
• Internationalization
• File upload
• Inter-portlet communication
• Wrapping existing applications
• WSRP

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Resources

• http//wiki.java.net/bin/view/Javapedia/Portal
• http//wiki.java.net/bin/view/Javapedia/Portlet
• http//www.jcp.org/en/jsr/detail?id168
• http//www.jcp.org/en/jsr/detail?id286