Portlets 2'0 JSR 286

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Portlets 2.0JSR 286

• Steve Millidge
• Member of the JSR286 Expert Group
• Architect of the Open Source iPoint Portal
• smillidge_at_c2b2.co.uk
• www.c2b2.co.uk

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What is a Portlet
A portlet is an application that provides a
specific piece of content (information or
service) to be included as part of a portal
page. The JSR 286 Spec
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The Portlet Container
A portlet container runs portlets and provides
them with the required runtime environment. The
JSR 286 Spec
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Architecture
Portal
Remote Portlet Container
Portlet API
Portlet
Portlet
Local Portlet Container 1
Portlet API
Portlet
Portlet
Local Portlet Container 2
Portlet
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JSR 168 Limitations
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JSR168 Portlets are Islands

• Can not Communicate with other Portlets
• Can not Influence the Portal Page
• Can not generate non markup content
• Dont support Web Frameworks well

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JSR 286Building Bridges
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Shared Session Parameters

• Available in JSR 168
• Only works for portlets in the same Web
  Application
• Limited Use

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Public Render Parameters

• Shared Render State Between Portlets
• Parameter Declared in portlet.xml
• Portlet Declares Support for it in portlet.xml

ltpublic-render-parametergt ltidentifiergtzipcodelt/i
dentifiergt ltqname xmlnsxhttp//www.foo.com/pa
ramsgtzipcodelt/qnamegtlt/public-render-parametergt
ltportletgt ltportlet-namegtgazeteerlt/portlet-namegt
ltsupported-public-render-parametergtzipcodelt/sup
ported-public-render-parametergtlt/portletgt
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Portlet Communication
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Portlet Events

• Major Feature of 286
• Coordinates Portlets w.r.t. State Changes
• Events Raised in processAction
• New Processing Phase before Render
• processEvents
• Events can be raised in processEvents

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Event Definition

• Event Names Defined in the portlet.xml
• Portlet Declares Support in portlet.xml
• Event Content must have JAXB Binding

ltevent-definitiongt ltnamegtProductSelectedForPurch
aselt/namegt ltvalue-typegtcom.example.Productlt/valu
e-typegtlt/event-definitiongt ltportletgt
ltportlet-namegtShopping Cartlt/portlet-namegt
ltsupported-processing-eventgt ltnamegtProductSelecte
dForPurchaselt/namegt lt/supported-processing-event
gtlt/portletgt
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Possible Usage
Portal
1) processAction
ProductCataloguePortlet
2) setEvent(EventPayload)
4) render()
3) processEvent()
ShoppingCartPortlet
5) render()
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Resource Serving

• Generate non-markup Content
• Images
• PDF
• Supports Simple AJAX
• New Lifecycle Method
• serveResource
• New URL Type
• ResourceURL
• No Interportlet Coordination in serveResource

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Other Minor Improvements

• Support for Changing Headers
• Cookies, META tags etc.
• Better Web Framework Integration
• Annotations Support in Generic Portlet
• Portlet Managed Modes
• Portlet Filters similar to Servlet Filters
• Access to Portlet Window ID
• URL Generation Listeners

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Thank you
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