sap - building web services with java and sap web application server
TRANSCRIPT
8/13/2019 SAP - Building Web Services With Java and SAP Web Application Server
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Building Web Services withJava and SAP Web ApplicationServer
Martin Huvar Product Manager Enterprise Services / SAP AG Walldorf
Timm Falter Project Manager Web Services / SAP AG Walldorf
SAP AG 2003, TechED_Basel / OSI202, Timm Falter / Martin Huvar / 2
Learning Objectives
As a result of this lecture, you willbe able to:
Comprehend the main ideas of SAPs Web Service definition
Understand the architecture of the Web Service Framework
Understand what Virtual Interfaces, Web Service
Definitions, Web service Configurations and other conceptsof the Web Service Framework are
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Agenda
Web Service Overview
What are Web services?
Why do we need them?
SAP NetWeaver
Web Service Technology
SAP Web Application Server 6.40
Providing Web Services
Consuming Web Services
Summary
SAP AG 2003, TechED_Basel / OSI202, Timm Falter / Martin Huvar / 4
Web Services Definition
Web Services are
application functionalities
supporting direct interaction
by responding to service requests
based on open Internet Standards
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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 AG 2003, TechED_Basel / OSI202, Timm Falter / Martin Huvar / 6
UDDI
Web Service Paradigm
3
ServiceExecution
2
Service Requestor
ServiceDiscovery
Service Provider
Service Directory
1
ServicePublication
WSDL/
XSD
XML/
SOAP http
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Web Services: Examples
Intelligent product catalog search
Product availability check
Pricing inquiry
Customer credit check
Order status check
Vendor managed inventory
Demand forecasts, stock
replenishment …
Dynamic auctioning and bidding
Publish and analyze financial
reports (XBRL based)
Electronic bill presentment and
payment
Matching vacancies and job
applicants profiles
Postal service address check
UDDI registration and discovery
services
Automated web searches(Google)
SAP AG 2003, TechED_Basel / OSI202, Timm Falter / Martin Huvar / 8
Demo
Demo
Web Service
Example
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Example: Web Service Szenario Credit Limit Check
CRM
Order Create
Order
Credit
Management
System
Credit
Limit
Check
Financial
ProcessOrder
Creditlimit
OK?
Credit
standing
Database
History
Database
OK
rejected
= Web Service
Customer Company Service Provider
SAP AG 2003, TechED_Basel / OSI202, Timm Falter / Martin Huvar / 10
Credit Limit Check Example: Architecture
RFC Function Module
(External Id -> Internal ID)
R/3 Enterprise 4.7
Session Enterprise Java Bean
SAP Web
AS 6.30 (Java)SAP JCo Proxy SAP JCo Proxy
RFC Function Module
(Credit Limit Check)
Virtual Interface Virtual Interface
SAP Web AS 6.30 (Java)
Cell Phone Shop
Web Application (JSP)
Microsoft Excel XP / 2003 Beta
Credit Limit Check
Company Worksheet
Web Service Web Service
Web Service ProxyWeb Service Proxy
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Fundamental Elements of the complete Web ServiceSolution
Web Service
Technology
Open TechnologyStandards for Web
Services
Web Service
Technology Referent
to business
semantics
SAP NetWeaver
RosettaNet,
Spec2000,
HR-XML,XBRL, IFX,
papiNet,
....
XML, WSDL, SOAP, UDDI, WSI
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Agenda
Web Service Overview What are Web services?
Why do we need them?
SAP NetWeaver
Web Service Technology
SAP Web Application Server 6.40
Providing Web Services
Consuming Web Services
Summary
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Providing Web services based on Open Standards
UDDI
SOAP Processing
B u s
i n e s s
A p p
l i c a
t i o n
Web Service Configuration
UDDI Publishing
WSDL Generation
Development
Environment
Web Service
Consumer
Web Service
Configuration
W e
b S e r v
i c e
I n t e r f a c e
s
R F C
B A
P I
I D o c
E J B
SAP Web
Application
Server
Extensible RuntimePluggable Features
Security
Transactions
Protocols
WSDL
SOAP
SAP AG 2003, TechED_Basel / OSI202, Timm Falter / Martin Huvar / 14
Consuming Web services based on Open Standards
UDDI
SOAP Processing
B u s
i n e s s A
p p
l i c a
t i o n
UDDI based Web Service
discovery
Web Service Proxy
Generation
Proxy Configuration
Development Environment
Proxy Config.
W e
b S e r v
i c e
P r o x
i e s
SAP Web Application
Server
Extensible runtime
Pluggable features
Security
Transactions
Protocols
WSDL
SOAP
Web Service
Provider
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Exchange Infrastructure & Web Services
Exchange Infrastructure
mySAP
Component
mySAP
ComponentmySAP
Component
mySAP
ComponentNON SAP
Component
NON SAP
ComponentNON SAP
Component
NON SAP
Component
SOAP
Adapter
Native
Protocol
Native
Protocol
SAP Web Application Server
SOAP
SOAP
SOAP
Web Services Infrastructure
Web Services Infrastructure
Business Process
Engine
Business Process
Engine
Routing
Routing
Mapping
Mapping I n t e g r a
t i o n
R u n
t i m e
Integration
Repository &Directory
Integration
Repository &Directory
RMI
RMI...
...
Persistency
Persistency
RFC
RFC
Adapter
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Agenda
Web Service Overview What are Web services?
Why do we need them?
SAP NetWeaver
Web Service Technology
SAP Web Application Server 6.40
Providing Web Services
Consuming Web Services
Summary
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Web Service within SAP Web Application Server
The Web Service capability within SAP Web AS is
the foundation for all mySAP.com solutions
a scalable, reliable Web application infrastructure that delivers high-
performance Web Services
offering Web Service functionality for the ABAP and J2EE
personality with a common architecture
allowing to expose existing functionality (BAPIs, RFMs, IDOCs,
EJBs, Java Classes, XI Server Proxies) as Web Service
easily allowing to consume Web Service from any source
requiring only configuration (no coding)
SAP AG 2003, TechED_Basel / OSI202, Timm Falter / Martin Huvar / 18
Benefits
Web Service interfaces provide a ‚virtual‘ abstraction from theimplementation layer
Fully integrated into development environment
Full fledged UDDI capabilities
UDDI server implementation
UDDI client functionality
Standard compliant WSDL generation
Support of client proxy generation for ABAP and J2EE
Extensible SOAP Runtime
Pluggable Features
Security
Protocols
....
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SAP Web Services Infrastructure- Role-based Approach -
Provider side
Web Service Developer
defines design time information of a Web Service
Web Service Configurator
defines runtime information of a Web service
Consumer side
Web Service Client Developer
SAP AG 2003, TechED_Basel / OSI202, Timm Falter / Martin Huvar / 20
Agenda
Web Service Overview What are Web services?
Why do we need them?
SAP NetWeaver
Web Service Technology
SAP Web Application Server 6.40
Providing Web Services
Consuming Web Services
Summary
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The Web Service Creation Wizard- Background -
Creating a Web Service in less than 1 minute
- The Web Service Creation wizard
proves that Web services are easy and out-of-the-box
allows to expose an existing endpoint as a Web Service with few
mouse-clicks
Only shows the most important settings in the wizard
Default values for other settings
hides technical details
implicitly creates all necessary objects
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Steps for the Web Service Wizard
Implement Business Logic1
UDDI
Start Web Service Wizard2
Publish Web Service
(optional)3a
Deploy Web Service3
Virtual
Interface
Web
ServiceDefinition
Web
ServiceConfig.
generate
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Demo
Demo
Web Service
Creation Wizard
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Web Service Wizard Results
All necessary files are created
Virtual Interfaces
Web service Definition
Web Service Configuration
Enterprise Application Project (optional)
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The Web Service Homepage
The Web Service Homepage
is available for each deployed Web Service
shows the documentation for the Web Service
allows to retrieve WSDL descriptions in different styles
allows to generate standalone proxies
offers testing capabilities
SAP AG 2003, TechED_Basel / OSI202, Timm Falter / Martin Huvar / 26
Web Service Explorer
The Web Service Explorer
is part of SAP NetWeaver Developer Studio
shows deployed Web services from different servers
(SAP and Non SAP)
is the starting point for the Web Service Homepage
is the starting point for Web Service Proxy generation
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Demo
Demo
Web Service
Homepage &Explorer
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The Web Service Creation Wizard- Background -
The Step-by-Step approach
Create all objects by hand
Full flexibility and options
More expenses
… but still configuration only
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The Step by Step Approach
Implement Business Logic1
UDDI
Define Virtual Interface (VI)2
Create Web Service Definition (WSD)3
Publish Web Service
(optional)5a
Publish WSD
(optional)3a
Deploy Web Service5
Configure Web Service4
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Support for Web Service Developers (1)- Background -
The Web Service developer
knows/defines the application logic
knows/defines the Web Service Interface
which should be accessible for clients
knows/defines the “behavior” of the Web Service
e.g. “Stateless / Stateful”, Security requirements, etc.
does not need to have detailed knowledge about
technical protocols which implement abstract behavior
concrete application servers on which the Web Service will be running
Defines Design-Time information of a Web Service
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Support for Web Service Developers (2)- Tasks of a Web Service Developer -
Step 1: Implementing the business logic
Supported by the standard IDE
Takes place in “Endpoint-specific” standard Tools
Java: SAP NetWeaver Developer Studio
ABAP: SE80
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Support for Web Service Developers (3)- Tasks of a Web Service Developer -
Step 2: Definition of Virtual Interface
Web Service Interface = Interface visible to clients (via WSDL, UDDI, … )
Supported by the Web Service Infrastructure via Virtual Interface Editor
A Virtual Interface
provides abstraction from concrete implementation (=endpoint)
allows to publish a “view” on existing implementations as Web Service
Interfaces
i.e. renaming, hiding of parameters/methods, default values
allows to define how the Web Service Interface is represented in the
SOAP message
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Virtual Interfaces
Virtual
Interface
Implementation
Layer
i_credit
segment (I)i_partner
(I)
e_score
(O)FSCM_Cr_Limit_Check
e_limit
(O)
e_currency
(O)
e_valid_to
(O)
<SOAP-ENV:Envelope>
<SOAP-ENV:Body>
<ns1:creditLimitCheck>
<ns1:idNumber>1001</ns1:idNumber>
</ns1:creditLimitCheck>
</SOAP-ENV:Body></SOAP-ENV:Envelope>
<SOAP-ENV:Envelope>
<SOAP-ENV:Body>
<rpl:creditLimitCheckResponse>
<rpl:Response>
<tns:score>980</tns:score>
<tns:creditLimit>500000.00</tns:creditLimit>
<tns:limitCurrency>USD</tns:limitCurrency>
<tns:validTo>2005-01-01</tns:validTo></rpl:Response>
</rpl:creditLimitCheckResponse>
</SOAP-ENV:Body>
</SOAP-ENV:Envelope>
idNumber
(I)
score
(O)credit
Limit (O)
limit
Currency (O)
valid To
(O)creditLimitCheck
Request
Default Value:
BUP001
Response
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Virtual Interfaces
Virtual
Interface
Implementation
Layer
i_credit
segment (I)i_partner
(I)
e_score
(O)FSCM_Cr_Limit_Check
e_limit
(O)
e_currency
(O)
e_valid_to
(O)
<SOAP-ENV:Envelope><SOAP-ENV:Body>
<ns1:creditLimitCheck>
<ns1:idNumber>1001</ns1:idNumber>
</ns1:creditLimitCheck>
</SOAP-ENV:Body>
</SOAP-ENV:Envelope>
<SOAP-ENV:Envelope>
<SOAP-ENV:Body>
<rpl:creditLimitCheckResponse>
<rpl:Response>
<tns:score>980</tns:score>
<tns:creditLimit>500000.00</tns:creditLimit>
<tns:limitCurrency>USD</tns:limitCurrency>
<tns:validTo>2005-01-01</tns:validTo>
</rpl:Response>
</rpl:creditLimitCheckResponse>
</SOAP-ENV:Body>
</SOAP-ENV:Envelope>
idNumber
(I)
score
(O)credit
Limit (O)
limit
Currency (O)
valid To
(O)creditLimitCheck
Request
Default Value:
BUP001
Response
Rename Methods
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Virtual Interfaces
Virtual
Interface
Implementation
Layer
i_credit
segment (I)i_partner
(I)
e_score
(O)FSCM_Cr_Limit_Check
e_limit
(O)
e_currency
(O)
e_valid_to
(O)
<SOAP-ENV:Envelope>
<SOAP-ENV:Body>
<ns1:creditLimitCheck>
<ns1:idNumber>1001</ns1:idNumber>
</ns1:creditLimitCheck>
</SOAP-ENV:Body></SOAP-ENV:Envelope>
<SOAP-ENV:Envelope>
<SOAP-ENV:Body>
<rpl:creditLimitCheckResponse>
<rpl:Response>
<tns:score>980</tns:score>
<tns:creditLimit>500000.00</tns:creditLimit>
<tns:limitCurrency>USD</tns:limitCurrency>
<tns:validTo>2005-01-01</tns:validTo></rpl:Response>
</rpl:creditLimitCheckResponse>
</SOAP-ENV:Body>
</SOAP-ENV:Envelope>
idNumber
(I)
score
(O)credit
Limit (O)
limit
Currency (O)
valid To
(O)creditLimitCheck
Request
Default Value:
BUP001
Response
Rename Parameters
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Virtual Interfaces
Virtual
Interface
Implementation
Layer
i_credit
segment (I)i_partner
(I)
e_score
(O)FSCM_Cr_Limit_Check
e_limit
(O)
e_currency
(O)
e_valid_to
(O)
<SOAP-ENV:Envelope><SOAP-ENV:Body>
<ns1:creditLimitCheck>
<ns1:idNumber>1001</ns1:idNumber>
</ns1:creditLimitCheck>
</SOAP-ENV:Body>
</SOAP-ENV:Envelope>
<SOAP-ENV:Envelope>
<SOAP-ENV:Body>
<rpl:creditLimitCheckResponse>
<rpl:Response>
<tns:score>980</tns:score>
<tns:creditLimit>500000.00</tns:creditLimit>
<tns:limitCurrency>USD</tns:limitCurrency>
<tns:validTo>2005-01-01</tns:validTo>
</rpl:Response>
</rpl:creditLimitCheckResponse>
</SOAP-ENV:Body>
</SOAP-ENV:Envelope>
idNumber
(I)
score
(O)credit
Limit (O)
limit
Currency (O)
valid To
(O)creditLimitCheck
Request
Default Value:
BUP001
Response
Hide parameters and
/ or provide default
values
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Demo
Demo
Virtual Interfaces
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Support for Web Service Developers (4)- Tasks of a Web Service Developer -
Step 3: Creation of Web Service Definition Web Service Definition = Assignment of behavior to a Web Service
Interface via features
Motivation
a Web Service is not only described by its interface but also by its behavior
with respect to
stateless/stateful communication,
transactional behavior,
security requirements, …
Idea:
describe this kind of behavior via abstract features
leave it to the Web Service Configurator to assign technical protocols to
these abstract features
Example:
Feature: Stateful
Technical Protocols: Stateful via HTTP-Cookies,Stateful via URL-Extensions
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Support for Web Service Developers (5)- Tasks of a Web Service Developer -
Benefits
The same Web Service definition can be deployed to various application
servers which may differ in their technical capabilities
Web Service Client implementations do not depend from technical server
information
Clients are generated based on implementation-independent Web
Service definitions
Technical details are configured separately in the Web Service Client
Runtime
Supported by the Web Service Infrastructure via
Web Service Definition Editor
UDDI Publication of Web Service Definitions
WSDL Generation for Web Service Definitions
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Demo
Demo
Web ServiceDefinition
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Support for Web Service Configurators (1)- Background -
The Web Service Configurator
knows the technical protocols which implement the abstract features
knows the System Landscape
knows the Web Service capabilities of the single Application Servers
Defines Runtime information of a Web Service
SAP AG 2003, TechED_Basel / OSI202, Timm Falter / Martin Huvar / 42
Support for Web Service Configurators (2)- Tasks of a Web Service Configurator -
Step 1: Technical configuration of a Web Service Definition
Assignment of technical protocols to the abstract features
based on the Web Service capabilities of the Application Server
Configuration of additional Web Service Runtime features
Logging, Tracing, Monitoring
Security Roles
…
Supported by the Web Service Infrastructure via
Web Service Configuration Editor
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Support for Web Service Configurators (3)- Tasks of a Web Service Configurator -
Step 2: Deployment of a Web Service
Deployment of the Web Service archive to a specific application
server
Supported by Web Service Infrastructure via
Integration of Web Service deployment in J2EE Deploy Tool
WSDL Generation for deployed Web Services
UDDI Publishing
Web Service Administrator
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Demo
Demo
Web ServiceConfiguration
and
Deployment
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Agenda
Web Service Overview
What are Web services?
Why do we need them?
SAP NetWeaver
Web Service Technology
SAP Web Application Server 6.40
Providing Web Services
Consuming Web Services
Summary
SAP AG 2003, TechED_Basel / OSI202, Timm Falter / Martin Huvar / 46
Support for Web Service Consumers (1)- Background -
The Web Service client developer
implements the client application
knows how to use the Web Service client proxy in the client application
knows how to get the description of a Web Service
(UDDI, WSDL, …)
knows how to generate the Web Service client proxy
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Support for Web Service Consumers (2)- Tasks of a Web Service Consumer -
Step 1: Retrieve description of Web Service
Retrieval of URL of WSDL description
either manually,
or using UDDI Browsing
Supported by the Web Service Infrastructure via
Web Service Proxy Project
UDDI Client Browser
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Support for Web Service Consumers (3)- Tasks of a Web Service Consumer -
Step 2: Generate Web Service Client Proxy
Start proxy generator based on imported WSDL Document
Supported by the Web Service Infrastructure via
Web Service Proxy Project
Step 3: Implementation of Client Application
Use generated client proxies
Supported by the Web Service Infrastructure via
the standard Java IDE
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Demo
Demo
Web Service
Proxy Project
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Summary
The Enterprise Service Architecture (ESA), SAP’s approach forbuilding services-oriented business applications utilizes Web
Services as vital part of its communication and integration
strategy
SAP’s rich business functionality, in conjunction with
state-of-the-art technology, enables you to establish cross-
company business processes as an integrated part of your
development efforts based on Web Services
SAP Web Application Server 6.40 offers an easy, convenient way
to build Web services
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Q A
Questions?
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Please complete your session evaluation and
drop it in the box on your way out.
Feedback
Thank You
The SAP TechEd ’03 Basel Team
8/13/2019 SAP - Building Web Services With Java and SAP Web Application Server
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