Julie Basu Senior Development Manager Nirav Chanchani Senior Product Manager Oracle Corporation

2. Julie Basu Senior Development Manager Nirav ChanchaniSenior Product Manager Oracle Corporation

3. Session id: 40258 Heterogeneous XML-based Data IntegrationUsing XQuery, J2EETM, and Database Technologies

4. Presentation Agenda • Business Problem • XML-based Data Integration • Querying with XQuery • Building Applications using the J2EETM Platform • Leveraging the XML Database • Demonstration • Next Steps

5. Synthesized Information Order Management Application Financial Application CRM Application Shipping and Distribution Application Contract Management Application Business Problem • Multiple domain-specific applications • Manufacturing, Inventory, Supply Chain, Financial, … • Information is trapped within these applications How does an organization get a consolidated view of its information – in real time ?

6. Technical Challenges • Domain-specific information • Replication does not make sense • Independent operation of applications • Access to information has to be in real-time • Different access method for each application • Each application has its own protocol and access method What architecture can best accommodate my present and future needs ? • Complexity: Avoid the n by m matrix • Flexibility: Add new sources easily • Time to market: Within days, not months

7. Presentation Agenda • Business Problem • XML-based Data Integration • Querying with XQuery • Building Applications using the J2EETM Platform • Leveraging the XML Database • Demonstration • Next Steps

8. What is XML-based Data Integration? XML-based Data Integration or Enterprise Information Integration (EII): • Create aggregated views using XQuery • Get information from diverse sources in XML • Consume synthesized information

9. XML Data Integration Example XQuery Engine Synthesized Information Order Tracking J2EETM CA EIS JDBC HTTP Parts Inventory Shipment Tracking Database Web Service

10. XQuery Engine Technologies Involved • Why XML? • Different data formats • Why XQuery ? • Declarative way to query XML documents • Why J2EETM ? • Standards-based infrastructure platform • Why XML Database ? • Native XML storage • XML data management • Performance optimizations XML-based Data Integration J2EETM Platform XML Database

11. Comparison with Existing Technologies

12. Presentation Agenda • Business Problem • XML-based Data Integration • Querying with XQuery • Building Applications using the J2EETM Platform • Leveraging the XML Database • Demonstration • Next Steps

13. What is XQuery? • Query XML Documents • FLWOR expression: • For: similar to SQL “from” clause • Let: declaring a variable • Where: similar to SQL “where” clause • Orderby: similar to SQL for sorting • Return: similar to SQL “select” clause • Operations • Filtering • Transformation • Joining

14. XQuery Sample Code • <descriptive-catalog> • { • for $i in document("catalog.xml")//item, • $p in document("parts.xml")//part[partno = $i/partno], • $s in document("suppliers.xml")//supplier[ suppno = $i/suppno] • order by $p/description, $s/suppnamewhere $i/price < 1000 • return • <item> • { • $p/description, • $s/suppname, • $i/price • } • </item> • } • </descriptive-catalog>

15. Advantages of XQuery • Declarative view definition • Less programming • Query optimization • Just like SQL, XQuery engine optimizes queries • Lower cost of code maintenance • Less code when compared to DOM or SAX

16. What’s New in XQuery? • Different from XSLT, not re-inventing wheel • Document ordering • Rules matching vs. nested SQL-like queries • XQuery 1.0 goals • Read-only, no transaction semantics, no security • Update capability not there yet • XQuery runtime • Could be in middle tier, database, or a hybrid

17. Presentation Agenda • Business Problem • XML-based Data Integration • Querying with XQuery • Building Applications using the J2EETM Platform • Leveraging the XML Database • Demonstration • Next Steps

18. Oracle Application Server 10g - The J2EETM Platform Building applications using J2EETM servicesin Oracle Application Server 10g • Data Source Access • Client Access • Caching • Security

19. J2EETM Data Sources • Different types of data sources with varying access protocols and APIs • Data sources : Applications, RDBMS, Documents, Message Queues, Proprietary • Access mechanisms: JDBC, J2EETM CA, Web Services, JMS, File I/O • Translation mechanisms: Oracle’s XML-SQL utility for JDBC result set, other

20. J2EETM Client Access Programmatic client access • XQuery Java API is being standardized in Java Community Process • JSR 225: Oracle and IBM leads • Higher-level APIs: EJB, Web Services, J2EETM CA, JSP tag library

21. XML Data Caching Cache data from sources and results • Choices: In memory, file, or database • Benefits: Better Performance • Decrease data fetching cost • Reduce latency of unreliable or remote sources • Eliminate re-execution of queries • Costs: Need to keep cached data fresh • Set expiration time for cached info • Invalidate or refresh upon update, e.g., DB triggers

22. Data Source & Cache Security • Delegate security checking to sources • For SQL / JDBC data source use JAAS • For J2EETM CA leverage the Principal Mapping and Custom Login module • Security of cached data - poses additional risk! • Require login / authentication before cache access • Use JAAS to enforce cache access policies

23. Presentation Agenda • Business Problem • XML-based Data Integration • Querying with XQuery • Building Applications using the J2EETM platform • Leveraging the XML Database • Demonstration • Next Steps

24. Oracle XML Database (XML DB) • Native XML storage • Available since Oracle Database Release 9.2 • Inherits RDBMS features: Security, Transaction,… • XML-specific features • XML indexing, XPath & XSLT support, XML schema validation, XML partial update • Supports SQL/XML • Allows blending relational and XML data operations

25. Leveraging Oracle XML DB • XML DB can be an XQuery source • Can define XML views of relational data • XQuery engine can rewrite query into SQL/XML • XML DB could also be used for caching • Efficient storage & indexing for large data sets • Can leverage security framework of XML DB • For both source and cache

26. What about Standards? • Most components based on existing standards: XML-based, J2EETM-based • Oracle is helping to move standards forward: • Query APIs • XQuery Java API: JSR 225 Oracle and IBM leads • XML Extension to JDBC: JSR 114 • XML metadata API to enhance usability • Candidate technology: CCI in J2EETM CA

27. D E M O N S T R A T I O N

28. Summary • What? • Get information from diverse sources in XML • Join, filter and transform data by XQuery • Apply Caching and Security appropriately • Consume synthesized information • Why? • Real-time information access and synthesis • Productivity: Quick development cycle, low code maintenance cost

29. Next Steps …. • See the solution in action at Oracle DEMOGrounds! • At the Oracle Application Sever 10g booth - Simplify Information Integration • Relevant web sites • OTN: http://otn.oracle.com • Contact information • Product Manager: Nirav.Chanchani@oracle.com

30. Q & Q U E S T I O N S A N S W E R S A

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