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Apache Ravehttp://rave.apache.org/

Bandana Banerjee TIE Kinetix, Netherlands

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Apache Rave

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What is Apache Rave

• A web based data integration application• A New Web & Social Mashup Engine• A lightweight Java platform to host widgets• An open community software for Enterprise Social

Networking & Shareable Web Components• A software to manage Open Social Gadgets and

W3C widgets

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Web Mashup

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What is Mashup• Idea for mashup is “combining data from two or more

sources and displaying in a unique way”• In the context of web development, mashup is

A web application to combine data, presentation or functionality from two or more sources to create new services

A second generation (Web 2.0) web application to aggregate contents retrieved from external data sources to create an entirely new and innovative service

Few common examples: • Google Maps for easy creation of Map mashup• Flickr for creating picture/ image mashup• WeatherBonk a weather mashup ( which combines Google Maps,

Weather Bug, national Weather Service)• TELCO Mashup - OMELETTE

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Difference between Portal &

Mashup

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Portal Mashup

ClassificationOlder technology, extension to traditional Web server model using well-defined approach

Using newer, loosely defined "Web 2.0" techniques

Philosophy/approach

Approaches aggregation by splitting role of Web server into two phases: markup generation and aggregation of markup fragments

Uses APIs provided by different content sites to aggregate and reuse the content in another way

Content dependenciesAggregates presentation-oriented markup fragments (HTML, WML, VoiceXML, etc.)

Can operate on pure XML content and also on presentation-oriented content (e.g., HTML)

Location dependencies Traditionally, content aggregation takes place on the server

Content aggregation can take place either on the server or on the client

Aggregation style"Salad bar" style: Aggregated content is presented 'side-by-side' without overlaps

"Melting Pot" style - Individual content may be combined in any manner, resulting in arbitrarily structured hybrid content

Event model Read and update event models are defined through a specific portlet API

CRUD operations are based on REST architectural principles, but no formal API exists

Relevant standards

Portlet behavior is governed by standards JSR 168, JSR 286 and WSRP, although portal page layout and portal functionality are undefined and vendor-specific

Base standards are XML interchanged as REST or Web Services. RSS and Atom are commonly used. More specific mashup standards such as EMML are emerging.

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Features of Apache Rave

• Apache Rave is not a portal, but mashup• Personalized content (for each user)• Shared web contents (between users)• Customizable• Multiplatform (Mobile and Desktop view)• Available Widget Store• Admin interface for user and widgets• Open Social and Wookie widgets

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Features of Apache Rave (contd..)• User and Group management• Available Widget Store with life-cycle

management and extended meta data• Support for inter-gadget messaging• Advanced OpenSocial compliance• Pluggable security/ authentication• LDAP, SSO Header authentication• oAuth• Pluggable persistence

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Technologies involved in Apache

Rave• Apache Shindig• Apache Wookie• Spring MVC & Spring Mobile• Support for inter-gadget messaging• Spring Security• Open JPA• Apache Tiles

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W3C Widgets

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Open Social Gadgets

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Some Other Gadgets

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W3C Widgets in Apache Wookie• Apache Wookie is the

container for widgets• It contains W3C

widgets• Plugins for Wookie Apache Rave Moodle LifeRay Drupal

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Open Social Gadgets in Apache

Shindig• Apache Shindig is the

container for open social gadgets

• iGoogle• Apache Rave• Yahoo• eBay• ORKUT

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http://docs.opensocial.org/display/OSREF/List+of+OpenSocial+Containers

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Inter Widget Communication

(IWC)• Communication between 2 or more widgets in the

workspace• Apache Wookie provides IWC via Google Wave• Apache Shindig provides IWC via pubsub API of

Google

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Inter Widget Communication

(IWC)

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Demo• http://dev.ict-omelette.eu/portal/login

• http://localhost:8080/portal

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References

• Apache Rave http://rave.apache.org/• Apache Wookie http://incubator.apache.org/wookie/• Apache Shindig http://shindig.apache.org/• Open Social http://docs.opensocial.org• W3C widgets

http://www.w3.org/2008/webapps/wiki/WidgetSpecs

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Future Discussions

• Next time discussion on following topics• Full duplex communication• RTC• WebRTC• NodeJS• JWebSockets• Other Web Socket implementations

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