Windows communication foundation (part1) jaliya udagedara
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Introduction to Web Services.
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Windows communication foundation (part1) jaliya udagedara
- 1. Windows Communication Foundation (WCF) - Part 1 Jaliya Udagedara MCPD http://www.jaliyaudagedara.blogspot.com/
- 2. What are we going to discuss today? ⢠Software Development Evolution ⢠Web Services ⢠Web Service Architecture ⢠Invoke a Web Service ⢠XML ⢠SOAP ⢠WSDL ⢠UDDI ⢠Demo
- 3. Software Development Evolution 1980s 1990s 2000s Object Component Service Oriented Based Oriented ⢠OOP Concepts ⢠Components ⢠Web Services ⢠Interfaces ⢠HTTP Requests ⢠Substitutable ⢠XML Messages ⢠Serialization
- 4. Web Services ⢠What is a Web Service? A software component designed to support interoperable machine-to- machine interaction over a network.
- 5. Web Services contd. ⢠Runs on a Web server. ⢠HTTP over RPC. ⢠SOAP (Simple Object Access Protocol) or REST (REpresentational State Transfer). ⢠Exposes functions. ⢠Listens for HTTP requests and executes Web methods. ⢠Software as a service without concern for the type of consumer.
- 6. Web Service Architecture Discovery Discover & Locate Description WSDL Invocation SOAP Transport HTTP
- 7. Invoke a Web Service WSDL SOAP Request Client Service SOAP Response ⢠Provides an endpoint description using WSDL. Processes XML messages framed using SOAP. ⢠Describes its messages using XML Schema. ⢠Communicates via open protocols (HTTP etc). ⢠Can be discovered using UDDI.
- 8. XML ⢠eXtensible Markup Language. ⢠XML : much like HTML. ⢠For describing data. ⢠XML tags are not predefined. We define our own tags. ⢠Prefect for Web Services.
- 9. XML contd. : XML vs. HTML <html> <body> <h1>Hello HTML</h1> <p>Paragraph</p> </body> </html>
- 10. XML contd. : XML vs. HTML <?xml version=1.0?> <myxml> <mytitle>Hello XML</mytitle> <mypara>Paragraph</mypara> </myxml> </xml>
- 11. XML contd. : XML vs. HTML ⢠HTML ⢠What Information? ⢠Hard for machine. Relatively easy for human. ⢠XML ⢠Not displaying. ⢠Readable to both human and machines.
- 12. SOAP (Simple Object Access Protocol) ⢠SOAP is a format for sending messages. ⢠SOAP is platform independent. ⢠SOAP is language independent. ⢠Different applications running on different operating systems. ⢠SOAP is based on XML.
- 13. SOAP (Simple Object Access Protocol) ⢠SOAP is a format for sending messages. ⢠SOAP is platform independent. ⢠SOAP is language independent. ⢠Different applications running on different on operating systems. ⢠SOAP is based on XML.
- 14. WSDL (Web Service Definition Language) ⢠Describes the functions & location of the service. ⢠Again XML Based.
- 15. UDDI (Universal Description Discovery and Integration) ⢠Directory of web service interfaces. ⢠Uses WSDL to describe interfaces. ⢠Communicates via SOAP.
- 16. DEMO
- 17. Thank You!
Hinweis der Redaktion
- Speaker Notes:Object OrientedInheritancePolymorphismAbstractionComponent BasedComponents : Objects not classesCommunicate though InterfacesEncapsulationSubstitutable : Classes that implements the interfaces can be replaced. (Component B can immediately replace component A, if component B provides at least what component A provided and uses no more than what component A used)Serialization : Store objects or Pass objects from one place to other