Building Web Services with ABAP and SAP Web

54 Pages·2003·1.34 MB·English

SAP TechEd ‘03 Basel
Building Web Services with
ABAP and SAP Web
Application Server
Timm Falter
Project Manager Web Services / SAP AG Walldorf
Martin Huvar
Product Manager Enterprise Services / SAP AG Walldorf
Learning Objectives
As a result of this lecture, you will
be able to:
(cid:132) Comprehend the main ideas of SAP’sWeb Service
definition
(cid:132) Understand the architecture of the Web Service Framework
(cid:132) Understand what Virtual Interfaces, Web Service
Definitions, Web service Configurations and other concepts
of the Web Service Framework are
SAP AG2003, TechED_Basel / OSI202, TimmFalter / Martin Huvar /2
© 2003 SAP AG Session ID, Speaker 1
SAP TechEd ‘03 Basel
Agenda
Web Service Overview
(cid:132) What are Web services?
(cid:132) Why do we need them?
SAP NetWeaver
Web Service Technology
SAP Web Application Server 6.40
(cid:132) Providing Web Services
(cid:132) Consuming Web Services
Summary
SAP AG2003, TechED_Basel / OSI202, TimmFalter / Martin Huvar /3
Web Services Definition
Web Servicesare
application functionalities
supporting direct interaction
by responding to service requests
based on openInternet Standards
SAP AG2003, TechED_Basel / OSI202, TimmFalter / Martin Huvar /4
© 2003 SAP AG Session ID, Speaker 2
SAP TechEd ‘03 Basel
The nature of Web Services
Web Services
act like a black-box that may require input and deliver a result
are modular, self-contained and self-describing
work on top of any communication technology stack
can be published, discovered and invoked based on open
technology standards
work in synchronous and asynchronous scenarios
facilitate integration within an enterprise as well
as cross enterprises
SAP AG2003, TechED_Basel / OSI202, TimmFalter / Martin Huvar /5
Web Service Paradigm
Service
Service
Publication
Discovery
1
2
Service Directory
WSDL/
UDDI
XSD
XML/
SOAP
http
3
Service
Service Requestor Execution
Service Provider
SAP AG2003, TechED_Basel / OSI202, TimmFalter / Martin Huvar /6
© 2003 SAP AG Session ID, Speaker 3
SAP TechEd ‘03 Basel
Web Services: Examples
Intelligent product catalog search Publish and analyze financial
reports (XBRL based)
Product availability check
Electronic bill presentment and
Pricing inquiry payment
Customer credit check Matching vacancies and job
applicants profiles
Order status check
Postal service address check
Vendor managed inventory
(cid:129) Demand forecasts, stock UDDI registration and discovery
replenishment … services
Dynamic auctioning and bidding Automated web searches
(Google)
SAP AG2003, TechED_Basel / OSI202, TimmFalter / Martin Huvar /7
Demo
Demo
Web Service
Example
SAP AG2003, TechED_Basel / OSI202, TimmFalter / Martin Huvar /8
© 2003 SAP AG Session ID, Speaker 4
SAP TechEd ‘03 Basel
Example: Web Service Szenario Credit Limit Check
Customer Company Service Provider
CRM Credit Financial Credit
Management standing
System Database
Order Create Credit
Order Limit
Check
Database
History
Creditlimit
OK?
Process
Order
OK
rejected
= Web Service
SAP AG2003, TechED_Basel / OSI202, TimmFalter / Martin Huvar /9
Credit Limit Check Example: Architecture
SAP Web AS 6.30 (Java) Microsoft Excel XP / 2003 Beta
Cell Phone Shop Credit Limit Check
Web Application (JSP) Company Worksheet
Web Service Proxy Web Service Proxy
Web Service Web Service
Virtual Interface Virtual Interface
Session Enterprise Java Bean
SAP Web
SAP JCoProxy SAP JCoProxy
AS 6.30 (Java)
RFC Function Module RFC Function Module
(External Id -> Internal ID) (Credit Limit Check)
R/3 Enterprise 4.7
SAP AG2003, TechED_Basel / OSI202, TimmFalter / Martin Huvar /10
© 2003 SAP AG Session ID, Speaker 5
SAP TechEd ‘03 Basel
Fundamental Elements of the complete Web Service
Solution
Open Technology
Standards for Web
Services
Web SReervfeicreent
XML, WSDL, SOAP, UDDI, WSI Tectho n obluosgiyness
semantics
RosettaNet,
Spec2000,
HR-XML,
Web Service XBRL, IFX,
Technology papiNet,
....
SAP NetWeaver
SAP AG2003, TechED_Basel / OSI202, TimmFalter / Martin Huvar /11
Agenda
Web Service Overview
(cid:132) What are Web services?
(cid:132) Why do we need them?
SAP NetWeaver
Web Service Technology
SAP Web Application Server 6.40
(cid:132) Providing Web Services
(cid:132) Consuming Web Services
Summary
SAP AG2003, TechED_Basel / OSI202, TimmFalter / Martin Huvar /12
© 2003 SAP AG Session ID, Speaker 6
SAP TechEd ‘03 Basel
Providing Web services based on Open Standards
SAP Web Development
Application Environment
Server (cid:122)Web Service Configuration
UDDI (cid:122)UDDI Publishing
(cid:122)WSDL Generation n
o
i
t
a
WSDL c
Web Service
i
l
Configuration p
p
A

SOAP Processing s
FC s
R e
n
(cid:122)(cid:122)EPlxutegngsaibbllee FReuantutirmese erviceaces BAPI Busi
SOAP Srf
(cid:122)Security b te oc
en D
(cid:122)Transactions WI I
Web Service (cid:122)Protocols B
J
E
Consumer
SAP AG2003, TechED_Basel / OSI202, TimmFalter / Martin Huvar /13
Consuming Web services based on Open Standards
Development SAP Web
Environment Application
(cid:122)UDDI based Web Service Server
discovery
UDDI
n (cid:122)Web Service Proxy
o Generation
i
at (cid:122)Proxy Configuration WSDL
c
i
l
p
p
A Proxy
s Config.
s
e e
usin Servicoxies SO(cid:122)EAxtPen Psibrole cruenstismieng
B eb Pr (cid:122)Pluggable features SOAP
W
(cid:122)Security
(cid:122)Transactions
Web Service
(cid:122)Protocols
Provider
SAP AG2003, TechED_Basel / OSI202, TimmFalter / Martin Huvar /14
© 2003 SAP AG Session ID, Speaker 7
SAP TechEd ‘03 Basel
Exchange Infrastructure & Web Services
Exchange Infrastructure
BBuussinineessss P Prroocceessss
n
oe EEnnggininee
tim IInntteeggrraattiioonn
granti RRoouutitningg RReeppoossiittoorryy&&
eu DDiirreeccttoorryy
ntR MMaappppiningg
I
SAP Web ApplicationServer
PPeerrssiisstteennccyy
RRFFCC
WWeebb S Seerrvviciceess I nInfrfraasstrtruucctuturree
......
RRMMII
SOAP SOAP
Adapter Adapter
Native Native
SOAP SOAP
Protocol Protocol
mmyySSAAPP NNOONN SSAAPP mmyySSAAPP NNOONN SSAAPP
CCoommppoonneenntt CCoommppoonneenntt CCoommppoonneenntt CCoommppoonneenntt
SAP AG2003, TechED_Basel / OSI202, TimmFalter / Martin Huvar /15
Enterprise Services: Runtime View
W e
e Standard Web Service ur
b S Execution (P2P) uct
Application OuPtrbooxuynd ervice Infrastru Service Infrastr InPbroouxnyd Application
ctu Integration eb
re Server W
Integration
SAP Web AS as client Repository SAP Web AS as server
& Directory
XI
Mediated Execution
via Web Services
SAP AG2003, TechED_Basel / OSI202, TimmFalter / Martin Huvar /16
© 2003 SAP AG Session ID, Speaker 8
SAP TechEd ‘03 Basel
Agenda
Web Service Overview
(cid:132) What are Web services?
(cid:132) Why do we need them?
SAP NetWeaver
Web Service Technology
SAP Web Application Server 6.40
(cid:132) Providing Web Services
(cid:132) Consuming Web Services
Summary
SAP AG2003, TechED_Basel / OSI202, TimmFalter / Martin Huvar /17
Web Service within SAP Web Application Server
The Web Service capability within SAP Web AS is
(cid:132) the foundation for all mySAP.com solutions
(cid:132) a scalable, reliable Web application infrastructure that delivers high-
performance Web Services
(cid:132) offering Web Service functionality for the ABAP and J2EE
personality with a common architecture
(cid:132) allowing to expose existing functionality (BAPIs, RFMs, IDOCs,
EJBs, Java Classes, XI Server Proxies) as Web Service
(cid:132) easily allowing to consume Web Service from any source
(cid:132) requiring only configuration (no coding)
SAP AG2003, TechED_Basel / OSI202, TimmFalter / Martin Huvar /18
© 2003 SAP AG Session ID, Speaker 9
SAP TechEd ‘03 Basel
Benefits
(cid:132) Web Service interfaces provide a ‚virtual‘ abstraction from the
implementation layer
(cid:132) Fully integrated into development environment
(cid:132) Full fledged UDDI capabilities
(cid:139)UDDI server implementation
(cid:139)UDDI client functionality
(cid:132) Standard compliant WSDL generation
(cid:132) Support of client proxy generation for ABAP and J2EE
(cid:132) Extensible SOAP Runtime
(cid:132) Pluggable Features
(cid:139) Security
(cid:139) Protocols
(cid:139) ....
SAP AG2003, TechED_Basel / OSI202, TimmFalter / Martin Huvar /19
SAP Web Services Infrastructure
- Role-based Approach -
(cid:132) Provider-side
(cid:139)Web Service Developer
(cid:122)defines design time information of a Web Service
(cid:139)Web Service Configurator
(cid:122)defines runtime information of a Web service
(cid:132) Consumer-side
(cid:139)Web Service Client Developer
SAP AG2003, TechED_Basel / OSI202, TimmFalter / Martin Huvar /20
© 2003 SAP AG Session ID, Speaker 10