Transcript The 100% Inspiration Tour

The 100%
Inspiration
Tour
Web Services – An Industry
Approach to the evolution of
Distributed Architecture
Mark Johnston
Academic Team, Microsoft UK
[email protected]
http://blogs.gotdotnet.com/i-markj
Topics
help
Introduction
Web Services Video
What's it all about
Visual Studio Web Services Demo
Web Services Stack
Visual Studio Web App Demo
The Future
Quiz
The Evolution of
Distributed Computing
HTML
Script
Visual Basic
PowerBuilder
Delphi
MS-BASIC
The Web
Turbo Pascal
QuickBasic
GUI
Cobol
RPG
The PC
Big Iron
Web Services
What is a Web Service?
“A programmable
application
component
accessible via
standard Web
protocols”
?
Web Services Benefits
Allows for sharing of functionality across:
Devices
Networks
Operating Systems
Programming languages
Built using open Internet standards
XML, SOAP, UDDI, WSDL
The Potential of Web Services
“With Web services, it’s easy for us to build a
tool that takes route information and displays
“ Web Services will revolutionise how we
it on the Web in a number of different formats,
work - how we interact with each other,
including a schematic layout that tells you not
with companies, with websites and
onlyproven
wherethat
thethe
bus
is, but
also
where it has
“We’ve
promise
of
XML
Web
beyond.
been.”
services
is real. You can develop a service that
can be exposed across multiple media formats,
A world of and
seamlessly
not have toconnected
write
an application
for each
Massachusetts
Institute
of Technology
applications
awaits.”
platform
toImplications
render it for of
each
medium.
Applied
Web
Services
Silicon.com This has incredible implications…”
GlaxoSmithKline
video
Online Ordering of Concert
Tickets
What Just Happened?
Service Provider
Network
Alerts
EMI
Bank
Homework
Reminders
News
providers
…
Internet
Applications of Web Services
eCommerce
Online ordering, B2B
Building-block services for developers
Sign-in, eWallets, etc.
Value-added features for client
applications
E.g. banking Web services for MS Money
Web Services in .NET
.NET Framework designed with distributed
computing in mind
Web services support loosely-coupled
distributed computing
Creating Web services in .NET is easy!
Based on open standards
Cross-platform
Simple to create, design and test
Human readable messages
Creating Web Services in Visual
Studio .NET
The Web Services Stack
UDDI
WSDL
SOAP
XML
Transport
e.g. HTTP, FTP or SMTP
UDDI
XML
WSDL
SOAP
XML
XML is the core of Web Services
Provides platform independent data
interchange
The format of all administrative data used by
web services
Verbose and Human readable
Highly extensible
UDDI
XML Code snippet
WSDL
SOAP
XML
<?xml version=“1.0”encoding=“utf-8”?>
<concerts>
<concert>
<name>The Darkness</name>
<venue seating=“3000”>Reading
</venue>
</concert>
</concerts>
UDDI
SOAP
WSDL
SOAP
XML
Simple Object Access Protocol
The primary communications interface
between Web services
Language and OS independent
Protocol independent
Not reliant on HTTP for transfer
Can be encrypted by nature of the
transport method used
UDDI
SOAP Code snippet
WSDL
SOAP
XML
<?xml version="1.0" encoding="utf-8"?>
<soap:Envelope xmlns:xsi=““
xmlns:xsd=“” xmlns:soap=“”>
<soap:Body>
<GetConcerts xmlns=“” />
</soap:Envelope>
UDDI
WSDL
WSDL
SOAP
XML
Web Services Description Language
Describes what services a web service can
be provide
Analogous to ‘reflection’
Gives a detailed “contract” for each service
provided
Contract specifies what interfaces are
exposed
WSDL Proxy Class Generation
UDDI
UDDI
WSDL
SOAP
XML
Universal Description Discovery and
Integration
An industry-wide project to standardize the
discovery of web services
A data model and API specification
Details on providers and their services
Both XML and non-XML services
Publish, Find & Bind Operations
An example UDDI registry can be found at
www.xmethods.com
Web application using Web
Services logic
The Global Web Services
Architecture (GXA)
Inter Application Protocols
Reliable Messaging
…
Eventing
Directory
Building Block Modules
Inspection
Referral
Security
…
Description
Routing
License
…
SOAP
The Internet
TCP/IP
XML
HTTP/SMTP
Applications of GXA
Suitable for secure of high-performance
architectures
Used for Grid Computing
Super Computing
Outsourcing
Internet-scale DataGrid
GXA is aligning with OGSA (Open Grid
Services Architecture)
Co-evolution of MS GXA and GGF OGSA
Summary
Industry is widely adopting and supporting
Web services
Not just a Microsoft initiative
XML Web services provide open, Internetnative integration
Fundamental shift: distributed computing
for the Internet
Visual Studio .NET makes creating
powerful Web service-driven applications
simple
Further Resources
Web Services
www.microsoft.com/webservices
www.uddi.org
Developer Community
www.gotdotnet.com
msdn.microsoft.com
Inspiration Tour Site
www.microsoft.com/uk/inspiration