Information Over The Web part III

1
Information Over The Web(part III)

• Introduction by
• Jackie Assa

2
Outline

• Today
• From previous class - Rest Json
• A long demo (axis2, tomcat)
• Working in TAU
• Project

3
REST Representational State Transfer

• REST is an architectural style, not a standard
• REST emphasizes
• Scalability of component interactions
• Generality of interfaces
• Independent deployment of components
• Support for intermediaries

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Key Principles of REST

• "Identification of resources"
• Resources are anything that can be named
• Naming authority assigns an identifier to a
  resource
• "Manipulation of resources through
  representations"
• Representations capture current/intended state of
  resources
• Representations are transferred between
  components
• Representations often contain links to related
  resources
• "Self-descriptive messages"
• Resource identifiers, representation data
  formats, control data
• "Hypermedia as the engine of application state"
• Servers are stateless, messages are independent
• Clients maintain state (representations)
  traverse links
• Induces scalability, generality, evolvability,
  extensiblity

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RESTs Generic Actions

• GET
• obtained the state of a resource
• POST
• update the state of a resource (non idempotent)
• PUT
• replace the state of a resource with a new
  version (idempotent)
• DELETE
• delete the resource

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Json example
"name" "Jack B. Nimble", "at
large" true, "grade" "A",
"format" "type" "rect",
"width" 1920, "height" 1080,
"interlace" false, "framerate"
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7
Java Web Development

• Eclipse WTP http//www.eclipse.org/downloads/morei
  nfo/jee.php
• Apache Tomcat http//tomcat.apache.org
• Apache Axis 2. http//ws.apache.org/axis/
• Apache Ant wouldnt hurt http//ant.apache.org

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Using eclipse
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Demo

• Many many many things, including
• Oxygen XML Editor
• Apache Axis2
• Apache Ant
• Apache TomcatLinks
• http//wso2.org/library/1719
• http//wso2.org/library/95
• Others from Apache Axis2 web site.
• Intoduction to JSP/Servlets
• http//www.wisdom.weizmann.ac.il/talm/talks/JSPIn
  tro.ppt

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Axis2
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Working in TAU

• Web server is tomcat (use JDK 1.5!)
• Use CS/system FAQ page for a description how to
  create your own server.
• The DMZ is located in KITE
• No user accounts
• No quota
• copy to and from there using scp and not cp
• The Java EE eclipse and MANY other installations
  in
• /users/courses/databases/workshop
• Axis2.0 file should be installed on the generated
  tomcat in the webapps folder (follow the
  installation instruction) (either as a war or
  inside your application war file)

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Project
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Ticketing Application
Promotions
Future events
Events catalog
Purchase tickets
Fan clubs data
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Behind the scenes
Examples for web services
Examples for web services
OTHER GROUPS
Tickets Catalog
Tickets Catalog
OTHER GROUPS
Tickets purchase
Tickets purchase
Reservation handling
Reservation handling
Detailed log
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Development stages

• Prototype, prototype and prototype
• Think
• Design
• Coding
• Integration
• Testing
• Release

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Good Luck

• mailtojackassa_at_post.tau.ac.il