1. Service-Oriented Application Integration

2. Service-Oriented Application Integration
Enterprises share common application services and information
Define application services they can share
Provide infrastructure for application service sharing
Examples:
Sharing common logic to process customers’ credit
Calculate shipping costs

3. Service-Oriented Application Integration
Built on multitier client/server architecture
Set of shared services on a common server
Services may be reused
Originally created for a single-organization use
Allows for loosely coupled applications

4. Service-Oriented Application Integration
Requires changes to most enterprise and B2B applications to take advantage
Expensive proposition
Concern about creating applications that share services not under direct control

5. Service-Oriented Application Integration
Web Services
Ability to access remote application services through a well-defined interface, directory, and transport protocol
Web Services Description Language (WSDL)
Universal Description, Discovery and Integration (UDDI)
Simple Object Access Protocol (SOAP)

6. Web Services Description Language (WSDL)
Provides a standard on interfaces between client and server
Defines an XML grammar to describe network services
Recipe to automate the way applications communicate

7. Universal Description, Discovery and Integration (UDDI)
Set of databases where businesses register their Web services
Allows other organizations to find Web service
Understand how to access service programmatically
Understand the interfaces employed

8. Web Services Locate the service using UDDI
Determine the interface definition using WSDL
Application services exposed by a company that are discoverable and accessible by other organizations
Example: reserving a flight, calculating tariffs
Discrete business services
Value to many organizations

9. Web Services
Web services tend to be created in a series of small, low risk steps
Combine information and applications that exist in local and remote information systems
Redundant application services at two or more systems
New application need

10. Web Services
Event-driven Web Services – architecture that deals more with information movement than application service aggregation
EX: moving order information from system to system and company to company to support purchase of a car

11. Web Services
Composite-application Solutions – architecture that requires many application services to aggregate into a single instance of an application

12. Web Services
Autonomous-distributed Solutions – architectures where Web services are tightly coupled, appear as a single application
Very future architecture

13. Web Services Missing Pieces No mechanism to leverage user interfaces
Lack support for authentication, encryption and access control
Lack ability to authenticate publishers or consumers of services

14. Application Integration
Rule
Agreed-upon set of conditions
Example: employees may not fly first class on flights of less than 5,000 miles
Rules are built into applications to control information flow
Rules can control the flow of information between enterprises

15. Application Integration
Logic
Sequence of instructions in a program
Example: when button is pressed, pop up this screen
Logic tends to be generated differently by different programmers, i.e., form of art
Sequential processing
Selection
Iteration

16. Application Integration
Data
Information that is shared between applications, computers, or humans
Objects
Data and business services bound as objects

17. Amazon.com
Books?
CD’s
Technology Company?

18. Amazon.com Amazon Web Services Patented one-click purchasing system
Tap quickly into sales data for particular products
Merchants & developers can get free access to services
Can use services from any outpost on the Web

19. Amazon.com
May sell wares to 37 million customers assembled at Amazon.com
Amazon takes a commission of 15%
Is Amazon an on-line mall?
Some of the retailers that use its e- commerce system
Lands’ End
Circuit City Store
Target Corp
Toys ‘R’ Us