1. Scale Up Access to your 4GL Application using Web Services
David Lund
Sr. Training Program Manager, Progress

2. Session Focus Identification of the best places to use web services
Implementing Progress 4GL Web Services
Identification of the best places to use web services
Choosing web service standards and technologies
Sample implementation of Progress 4GL Web Service
Progress 4GL Web Services

3. Agenda Getting started Standards Web service provider Deployment
Progress 4GL Web Services
Getting started
Standards
Web service provider
Deployment
Web service consumer
Progress 4GL Web Services

4. How Does This Relate to SOA
Service Oriented Architecture (SOA)
logic concept behind the physical implementations
One type of physical implementation is web services
Provider
Communications
Service Oriented
Progress 4GL Web Services

5. The Value of Web Services
Connects applications together through agreed upon standards
Share information between applications without writing a customized interface
Application can be written in any language
Provides an alternative method to access existing applications
For example: Access business logic of a client server application over the web
Progress 4GL Web Services

6. Common Business Logic The basics
OpenEdge® AppServer™ = Center of the business logic universe
Ways to access business logic
.NET™ Open Client
4GL Client
Java™ Open Client
Web services
WebClient™
WebSpeed®
OpenEdge Adapter for SonicMQ®
Progress 4GL Web Services

7. Configuration Clients Server Client/ Server (Provider) OpenEdge
Application
Server
Web
Service
Client
(Consumer)
Progress 4GL Web Services

8. Sorting out the Acronyms
Standards
Provider
Deployment
SOAP
WSDL
XML Schema
Style/Use
HTTP/HTTPS
JSE
Web Server
WSA
Session Model WSAD
AppObj
ProcObj
SubAppObj
WSM
Consumer
Progress 4GL Web Services

9. Agenda Getting started Standards Web service provider Deployment
Progress 4GL Web Services
Getting started
Standards
Web service provider
Deployment
Web service consumer
Progress 4GL Web Services

10. SOAP Standards Protocol for message exchange Independent Extensible
Lightweight & XML-based
Independent
Encoding
Transport
Language
Platform
Extensible
Extra context via headers
Supports
message typing
strong typing
structured data
SOAP
Progress 4GL Web Services

11. WSDL Web Service Description Language
Standards
This is the service contract
Data type mapping
SOAP message format
How to call the Web service
XML Document
Created by
Web service provider
Used by
Web service consumer
SOAP
WSDL
Progress 4GL Web Services

12. XML Schema Standards Comprise of a set of agreed upon rules
Structure, Content, Semantics
A means for defining for XML Documents
Used to define formats for SOAP and WSDL messages
Maps 4GL data types
SOAP
WSDL
XML Schema
Progress 4GL Web Services

13. OpenEdge WSDL Style/Use
Standards
RPC/Encoded
Messages use remote procedure call (RPC) model
Data format uses SOAP data model
Document/Literal
Messages use XML Document model
Defined as complex types in Types section
Data format conforms to standard XML schema
SOAP
WSDL
XML Schema
Style/Use
Progress 4GL Web Services

14. Web Services is Defined by Standards
A set of standards that comprise a platform for building distributed, interoperable applications
Progress 4GL Web Services utilizes W3C standards
WSDL 1.1 (W3C Note – de facto standard)
SOAP 1.1 HTTP Binding
2001 XML Schema
Progress 4GL Web Services

15. Agenda Getting started Standards Web service provider Deployment
Progress 4GL Web Services
Getting started
Standards
Web service provider
Deployment
Web service consumer
Progress 4GL Web Services

16. Open Client Object Model
Provider
Always one
Establishes connection
External procedures
Object
App
AppObj
ProcObj
SubAppObj
Zero or more
Shares connection
Internal procedures/UDFs
Proc
Object
Zero or more
Shares connection
External procedures
AppObj
Sub-
Progress 4GL Web Services

17. WSM Web Service Mapping File
Provider
Lists
Objects
Operations
Identifies Session Model
Initializes deployment information
Created by ProxyGen
AppObj
ProcObj
SubAppObj
WSM
Progress 4GL Web Services

18. Web Service Description
ProxyGen Tool
App
Object
Proc
Object
4GL
Business Logic
(r-code)
Sub-
AppObj
Project file
(.xpxg)
Web Services Mapping
file
(.wsm)
Web Service Description
Language file
(.wsdl)
Log
file
(.log)
Progress 4GL Web Services

19. ProxyGen Tool AppObj Selecting procedures ProcObj FindEmpByNum.r
ListDeptEmp.r
ProcObj
PersistenData.r
Progress 4GL Web Services

20. ProxyGen Tool General Tab
Generation Options
AppService
Generated
Proxy
Progress 4GL Web Services

21. ProxyGen Tool Web Services Tab
Generation Options
Session Model
Namespace
URL
Style/Use
Progress 4GL Web Services

22. Demonstration
ProxyGen
Progress 4GL Web Services

23. Agenda Getting started Standards Web service provider Deployment
Progress 4GL Web Services
Getting started
Standards
Web service provider
Deployment
Web service consumer
Progress 4GL Web Services

24. HTTP/HTTPS Deployment Communications Protocol
Used to transport SOAP messages
SOAP 1.1 HTTP Binding
Post/Response
HTTPS
SSL
Securely send messages
HTTP/HTTPS
Progress 4GL Web Services

25. JSE Java Servlet Engine
Third party components…
Deployment
Runs servlets
Progress 4GL Web Services deploys a servlet
JSE’s available from 3rd party vendors
Examples use Apache Tomcat
Has built in Web Server
Not recommended for production
JSE
HTTP/HTTPS
Progress 4GL Web Services

26. Web Server Deployment Required Accepts HTTP/HTTPS communications
Third party components…
Deployment
Required
Accepts HTTP/HTTPS communications
Hosts JSE
Web Server
HTTP/HTTPS
JSE
Progress 4GL Web Services

27. WSA Web Services Adapter
Deployment
WSA = Java™ servlet
Runs in JSE
Administers and provides access to deployed Progress 4GL Web services
Decodes and encodes SOAP messages
WSA
HTTP/HTTPS
JSE
Web Server
Progress 4GL Web Services

28. WSA in JSE on Web Server Consumer SOAP / HTTP HTTP Listener Web Server
Java Servlet
Web Server
SOAP / HTTP
Progress 4GL Web Services

29. Session Model Deployment Session Managed Session Free
State-aware, State-reset, Stateless
Holds resources
Session Free
Does not maintain any state
Session Model
HTTP/HTTPS
JSE
Web Server
WSA
Progress 4GL Web Services

30. WSAD Web Service Application Descriptor
Deployment
Describes web service to the WSA
Information on how to access AppServer application
WSAD
HTTP/HTTPS
JSE
Web Server
WSA
Session Model
Progress 4GL Web Services

31. Demonstration
Progress Explorer
Deployment
Progress 4GL Web Services

32. Agenda Getting started Standards Web service provider Deployment
Progress 4GL Web Services
Getting started
Standards
Web service provider
Deployment
Web service consumer
Progress 4GL Web Services

33. Service Consumer Calls the web service Typical Scenarios
Application to Application
Business to Business
Background
End User
Portions of application available
Consumer
Progress 4GL Web Services

34. The Client Consumer WSDL POST SOAP over HTTP Progress Other Response
Java™ .NET
Progress
Other
Response
SOAP over HTTP
WSDL
Progress 4GL Web Services

35. Putting It All Together
Client
(Consumer)
HTTP Listener
WSA
Java Servlet
Web Server
POST
SOAP over HTTP
Response
SOAP over HTTP
Server
(Provider)
OpenEdge
Application
Server
Progress 4GL Web Services

36. Demonstration Server (Provider) Client (Consumer) Calling a Web
Service
Client
(Consumer)
Progress 4GL Web Services

37. In Summary Identify where to use web services solutions
Implementing Progress 4GL Web Services
Identify where to use web services solutions
Choose the web service standards and technologies to suit your needs
Use the examples to help in implementing your own web service solutions
Progress 4GL Web Services

38. Documentation OpenEdge Development Web Services Progress 4GL Reference
Progress 4GL Web Services

39. Questions? Server Client/ Server Clients OpenEdge Application Server
Web
Service
Client
Progress 4GL Web Services

40. Thank you for your time!
Progress 4GL Web Services

41. Progress 4GL Web Services