Web services

1. Web Services Chidi Ononiwu

3. Challenges

4. Web Services

6. Web Services Stack

7. Web Services components XML WSDL UDDI Components Web Services SOAP

8. Extensible Markup Language (XML)

9. What is URI often used in XML

10. Extensible Markup Language (XML)

13. Extensible Markup Language (XML)

14. Extensible Markup Language (XML)

15. Extensible Markup Language (XML) Schema DTD Style sheet XML

18. Simple Object Access Protocol (SOAP)

20. Simple Object Access Protocol (SOAP) Depicting Encapsulation

21. Simple Object Access Protocol (SOAP)

22. Simple Object Access Protocol (SOAP)

23. Simple Object Access Protocol (SOAP)

24. Web services Description Language (WSDL)

25. Web services Description Language (WSDL)

27. WSDL Roles By employing WSDL standard, organizations are sharing the same standards for data description and connection protocols, which to them reduce application development time and cost and facilitate the integration. The consistent interface and infrastructure reuse can also simplify integration with other services. This enables tighter business relationships more efficient business processes. Thus increase customers’ satisfactions and gives organisation competitive advantages

30. How UDDI Works UDDI Registry 3 . Registry operator assigns a unique identifier to each service and business registration Marketplaces, search engines, and business apps query the registry to discover services at other companies 4 . Service Type Registrations SW companies, standards bodies, and programmers populate the registry with descriptions of different types of services 1 . Business Registrations Business uses this data to facilitate easier integration with each other over the Web 5 . Source: International Business Machines Corporation . Businesses populate the registry with descriptions of the services they support 2 .

33. Business Benefits of Web services Reduce the cost of operations Leverage the best products and services of others as needed Find and use others' best processes without today's lengthy negotiations Save on business process integration costs Connect dynamically with partners, at will, and execute transactions in real time without time-consuming manual processes Reduce the up-front cost of changing business models to gain advantage in the market Be able to change your business without changing your systems Reduce the cost of development and the time required to implement solutions Create Web services from your existing applications and processes Find best-of-breed services from others and dynamically adding them to your applications without custom coding Make use of expertise not available internally, while you stay focused on what you do best Increase revenue

34. Business Roles being Pursued Service Requester User of Service (Business/Consumer): Integration of web services with intention to reduce operational costs or improve flexibility of choice. Business Model: Aggregator or to improve efficiencies to increase profit Service Provider Producer of Service Offerings Business Revenue Model: Transactional, Subscription, Lease Registry / Broker Provider of Directory Intelligent directory supporting searches and service policy Business Revenue Model: Registration, Advertising, additional value add services Registrar Provider of advanced registration and search services into a Registry Business Revenue Model: Registration Aggregator/Portal Service provider of combined services Intermediary. Such a company would be a Web Services Service Provider Business Revenue Model: Registration, Transactional, Subscription

35. Business scenario A company called VCK Inc., which manufactures certain food products and markets in the Victoria State.- Melbourne The company is headquartered in Melbourne. VCK Inc., wants to publish its Inventory Availability Web Service, so that its vendors can see online inventory. VCK Inc. decides to publish the Web Services Technical scenario For UDDI business registration, VCK Inc. uses a tool such as IBM iseries, or Java Message for XML (JMX) to create an XML file used to describe a business entity and its Web Services. The information that will be provided in a UDDI business registration will consist of three components: “white pages” which include address and contact information, “ yellow pages ” which include business categorizations and “green pages”, the technical information about services that are provided by the business. Then the web services can be published in the UDDI registry under Food manufacturing domain.

37. Typical business scenario.

40. Example of the Purchase Order that is encapsulated in SOAP for VCK company <?xml version=&quot;1.0&quot; encoding=&quot;UTF-8&quot;?> <soap-env:Envelope xmlns:soap-env= &quot;http://schemas.xmlsoap.org/soap/envelope/&quot;> <soap-env:Header> <From>JOHNS</From> <To>Manufacturer</To> </soap-env:Header> <soap-env:Body> <PurchaseOrder custId=&quot;JOHNS&quot; poRef=&quot;JOHNS1048316652804&quot; poDate=&quot;20030322&quot; poValue=&quot;25235&quot;> <billTo country=&quot;AE&quot;> <name>John Simon</name> <street>P.O Box 00001</street> <city>Dubai</city> <state>Dubai</state> <zip>00001</zip> </billTo>

41. <shipTo country=&quot;AE&quot;> <name>John Simon</name> <street>P.O Box 00001</street> <city>Dubai</city> <state>Dubai</state> <zip>00001</zip> </shipTo> <orderItems> <orderItem partNum=&quot;2512EA&quot;> <productName>Presario-2512EA Laptop PC</productName> <quantity>2</quantity> <price>5725.0</price> <desc>Intel-P4, 2.5GHz, 256MB RAM, 40GB HDD, 15&quot; XGA</desc> </orderItem> <orderItem partNum=&quot;2125EA&quot;> <productName>Presario-2125EA Laptop PC</productName> <quantity>3</quantity> <price>4595.0</price> <desc>Intel-M Celeron, 2.0GHz, 256MB RAM, 30GB HDD, 15&quot; XGA</desc> </orderItem> </orderItems> </PurchaseOrder> </soap-env:Body> </soap-env:Envelope>