1. WHERE TO USE THE
ORACLE SERVICE BUS ?
OBUG Connect
24 April 2012 @ MECC Maastricht

2. Who ?
Jan van Zoggel Edwin Biemond
jvzoggel.wordpress.com biemond.blogspot.com
J/E

3. Agenda
 Overview
 OSB & SOA Suite
 Using the OSB
 Bad Practices
E

4. Enterprise Service Bus
An ESB on its own is not a complete SOA
solution, even though it is often marketed
that way.
Gartner/Burton Group 2007
E

5. How to use the OSB ?
J

6. J

7. Agenda
 Overview
 OSB & SOA Suite
 Using the OSB
 Bad Practices
E

8. Finance domain CRM domain
Load balancing
OSB Throthling OSB
Dyn. Routing
SLA / Endpoint
Mediator Mediator
intercomposite Mediator
BR BPEL Mediator BPEL
BPEL
Mediator Mediator
Mediator Mediator
OSB SB Transports OSB
OSB OSB
BizApi WS
FIN Application CRM Application
E

9. Where to use Mediator ?
 Loosely coupling of Oracle BPEL
 Intra composite
 EDN
 Multi routing
 Specific features:
 MDS usage
 Domain Value mapping
 Xref (cross referencing ) support
 Synchronous / Asynchronous Routing
E

10. Where to use Oracle BPEL ?
 Stateful
 Long running processes (dehydration store)
 Service Orchestration
 Compensation
 Fault framework
 Business Rules & Human workflow
J

11. Async Service in OSB
 10g BPEL transport
 11g SOA-direct transport
E

12. Agenda
 Overview
 OSB & SOA Suite
 Using the OSB
 Bad Practices
E

13. Using the OSB ?
 High volume*  Caching
 Stateless*  Load balancing
 Security  Endpoint SLA
 Transformation  Transports
 Throttling  Routing
J

14. Security
 Use OWSM for 11g & 12c
E

15. Transformation
 XQuery
 XSLT support
 Java callout support for JSON, JEJB transport
E

16. Control the workload
Throttling
 Limit requests on Business Service
 Uses memory Queue, no failover
 priority possible
J

17. Control the workload
Work Managers
 Protect WebLogic Server (Max Threads)
J

18. Caching
 Based on Oracle Coherence
 Protect back-end from heavy load
 Configurable time-to-live
 Uses Cache Token Expression
 e.g. fn:data($body/s01:getEmployee/EmpID)
J

19. Load Balancing
 Multiple load balancing algorithms
 Endpoint management:
 Supports service pooling
 Automatic URI elimination
J

20. Endpoint SLA
 Alert Rules
 Overview
E

21. Transports
 OSB transports > JCA transports
 Database + AQ use JCA -> JDeveloper
 File JCA reads chunks (large files)
 JEJB transport (java object over the bus)
E

22. Text Processing
 MFL will disappear
 Use Native Format Builder of Oracle SOA Suite
 Use Oracle B2B (part of SOA Suite) for EDI,
HL7, RosettaNet, etc
E

23. Routing
 Using Dynamic Routing
 Transport type must be the same
 Mediator: dynamic with business rules
+ interface must be the same
 Routing based on message content & headers (
performance )
 Mediator: only message content
J

24. Enrichment
 Use the Service Callout
 Mediator: almost impossible
J

25. Publish
 Fire-and-Forget messages (1 way)
 Logging / Audit
 Publish to local JMS
 Minimize message loss
 Prevent failure
 Offload with Store-and-Forward
E

26. Validate
 Use Validate action early in proxy (stage)
 Prevent transformation errors
 Prevent invalid information to back-end
 Basic XML schema validation
 No schematron support
E

27. Error handling
 Default the request $body returned (echo)
 Stage, Pipelines, Route & System
 $fault in OSB is no valid SOAP Fault
 Best Practice:
 define Error handling strategy
 define <soap:Fault> mapping
J

28. Agenda
 Overview
 OSB & SOA Suite
 Using the OSB
 Bad Practices
E

29. Bad practice I - Datamodel
Same WSDL
J

30. Bad practice II - Orchestration
E

31. Bad practice III – execute-SQL
fn-bea:execute-sql($datasrc, $rowElemName, $sql, $param1-n)
• Officially only retrieve (select), but …
• Designed for simple lookup (name value pair)
• Risk: bad SQL fired at database
• Increasing rows resultset => bad performance
E

32. Bad practice IV – Java galore
J

33. Bad practice V – Complexity
J

34. Conclusion
An ESB on its own is not a complete SOA
solution, even though it is often marketed
that way.
Gartner/Burton Group 2007
E

35. Questions
?

36. Shameless plug
The Oracle Service Bus
Development Cookbook is a book
which contains more than 80
practical recipes to develop
service- and message-oriented
solutions on the Oracle Service
Bus 11g.
OTN + Packt recipes available