Providing Web Services in ABAP

37 Pages·2006·2.06 MB·English

Providing Web
Services in ABAP
Dr. Susanne Rothaug
SAP NetWeaver Product Management
Enterprise SOA and Web Service Technology
Web Service Creation: Inside-out approach
Web Service Creation: Outside-In approach
Outlook to Web Services in the next SAP
NetWeaver release
SOA Is Great, But Not Enough
ENTERPRISE SERVICES CAPTURE BUSINESS SEMANTICS
AND REPRESENT A “COMMON LANGUAGE OF BUSINESS”
SOA + ES = Enterprise SOA
©SAP AG2006, S. Rothaug/ 3
Aspects of Enabling Enterprise Services
Service enabling consists of two aspects:
(cid:132) From a technology perspective, the SAP system has to support
communication based on the Web Services standards stack
(cid:132) From an application perspective, the SAP system has to provide
meaningful services to prospective client applications
Application Services: Web Services Technologies:
ABAP XML
Java XSD
Web-based WSDL
Standard SOAP
Custom BPEL4WS
SAP
Application
©SAP AG2006, S. Rothaug/ 4
Enterprise SOA
Business Processes and User Interaction
Enterprise
Services
Abstraction and Integration
Enterprise Applications
©SAP AG2006, S. Rothaug/ 5
What makes a Services an Enterprise Service
©SAP AG2006, S. Rothaug/ 6
Web Services Overview: Definition
WEB SERVICES are
SELF CONTAINED
and SELF DESCRIBING
APPLICATION FUNCTIONALITIES
that can be
PROCESSED
through
OPEN INTERNET STANDARDS
©SAP AG2006, S. Rothaug/ 7
Web Services Overview: The Nature of Web Services
Web Services
act like a black-box that may require input and deliver
a result
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 AG2006, S. Rothaug/ 8
Web Services Overview: The Paradigm
UDDI
Registry
2 1
Direct WSDL exchange
(cid:132)Discover Web service
(cid:132)Create Web service
(cid:132)Develop Client App
(cid:132) Create WSDL
(cid:132) Publish WSDL (opt.)
WSDL
Web
Document
Service
Consumer e
c
vi
r
e
s
b
e
W Business
SOAP
Functionality
3 (cid:132) Web service Execution Web service Provider
©SAP AG2006, S. Rothaug/ 9
Web Services Overview: WSDL Overview
Web Service Description Language
Describes the basic characteristics of a Web service
(cid:132) Supported operations and their data format e.g. xCBL Order
(cid:132) Supported protocols e.g. SOAP
(cid:132) Network address e.g. http://a.com/order
Further information
(cid:132) Working Group: http://www.w3.org/2002/ws/desc/
(cid:132) Specification: http://www.w3.org/TR/wsdl12/
©SAP AG2006, S. Rothaug/ 10