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EclipseLink Runtime Architecture

JavaEE Server. Query. Cache. TX. JDBC. JCA. JAXB. File, Document. EIS. XDB. EclipseLink Runtime Architecture. Presentation Interface (JSP,Servlet,Struts,Web Service, Custom). Application Logic (EJB Session Beans, Java Classes). Business Entities (EJB Entity Beans, Java Classes).

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EclipseLink Runtime Architecture

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  1. JavaEE Server Query Cache TX JDBC JCA JAXB File, Document EIS XDB EclipseLink Runtime Architecture Presentation Interface (JSP,Servlet,Struts,Web Service, Custom) Application Logic (EJB Session Beans, Java Classes) Business Entities (EJB Entity Beans, Java Classes) Persistence Manager Container Services Object Data Conversion CMP/BMP JTA EclipseLink Mappings O-R Connection Pools O-X JDBC Data Source

  2. Caching Architecture EntityManager EntityManager Factory UnitOfWork Session Server TX Cache Isolated Cache Cache Coordination Shared Cache JMS (MDB) RMI CORBA IIOP

  3. Spring ADF Java SE Java EE OSGi EclipseLink Domain Model Application Interface Meta Data Persistence Manager @ Annotations Mapping Metadata Java API Data Source Accessor and Platform XML Data Legacy Systems Databases

  4. Original API & Metadata: oracle.toplink.* ORM ORM/OXM, JAXB, EIS TopLink EssentialsJPA(oracle.toplink.essentials.*) 10.1.3.1 Oracle TopLink Roadmap Oracle Toplink EclipseLinkJPA, MOXy, SDO, DBWS, EIS(org.eclipse.persistence.*) 9.0.4 10.1.3 11g Future

  5. EclipseLink Roadmap GlassFish v3JavaEE 6 (2.0) EclipseGalileo (1.1.2) EclipseHelios (2.1) EclipseLink 1.0 1.1 1.2 2.0 2.1 1.0.1 1.0.2 1.1.1 11g 11gR1 OracleTopLink

  6. Spring ADF Eclipse Persistence Services “EclipseLink” Java SE Java EE OSGi Eclipse Persistence Services Project (EclipseLink)‏ JPA MOXy EIS SDO DBWS XML Data Legacy Systems Databases

  7. EclipseLink: Distributions • Eclipse.org • www.eclipse.org/eclipselink/downloads • http://download.eclipse.org/rt/eclipselink/updates • Oracle • TopLink 11g • WebLogic Server 10.3.1 • GlassFish v3 • Replaces TopLink Essentials • JPA 2.0 Reference Implementation • Spring Source • Spring Framework • Spring OSGi Bundle Repository

  8. EclipseLink Developer Tool Support • EclipseLink is a Runtime Project but supported by IDEs • Eclipse IDE • EclipseLink support included by Dali in Eclipse 3.4 (Ganymede) • EclipseLink included in Eclipse 3.5 (Galileo) – JavaEE • Enhanced Dali support for use of EclipseLink • Oracle Enterprise Pack for Eclipse (OEPE) • MyEclipse • JDeveloper 11g • JPA, Native ORM, OXM, and EIS mapping • NetBeans • Standalone Workbench • Native ORM, OXM, EIS

  9. Metadata Usage

  10. EclipseLink Java Persistence CUST ID NAME C_RATING JPA Relational Customer id: int name: String creditRating: int DBWS MOXy SDO <customer id=“…”> <name>…</name> … </contact-info> </customer> Java XML

  11. Where does EclipseLink JPA fit? Java SE/EE/OSGi Java Classes JPA Persistence Provider Mapping Metadata RelationalDatabase Database Schema Design Time Runtime

  12. L2 Cache Coordination Messaging JMS, RMI, IIOP, CORBA Type specific configuration Modes: Invalidate, Sync, Sync+New, None @Entity @Cache( coordinationType = INVALIDATE_CHANGED_OBJECTS) Cache Coordination Application EntityManager L1 Cache EntityManagerFactory Cache Coordination L2 Cache …

  13. L2 and L1 Caching Client-2 Client-1 EntityManager -2 L1 Cache EntityManager -1 EntityManagerFactory L2 Cache Read Pool Write Pool Read Write Read Write Read Write

  14. MOXy Binding Layer Java App document unmarshallingproduces objects object creation and updates through object-level API Objects Objects EclipseLink OXM results are returned as raw xml XPath is used tospecify mapping XPathquery elements/attributes

  15. SDO runtime combines: Java SDO Classes XML Schema Java SDO Classes SDO Runtime—“Static SDO” Java SE/EE SDO Implementation(EclipseLink MOXy)  XML Schema XML Document

  16. SDO runtime using: XML Schema SDO Runtime—“Dynamic SDO” Java SE/EE SDO Implementation(EclipseLink MOXy) XML Schema XML Document

  17. EclipseLink JDBC SQL Stored Procedure JP QL Expressions SQL Query Query By Example Cache Hit? Mappings Cache Database Application Rows Cache Result? Objects Object Builder EclipseLink Query Execution Query Framework

  18. Caching EntityManagerFactory EntityManager UnitOfWork Client Session TX Cache Isolated Cache Server Session SharedCache RDBMS

  19. Client-Server Session Client (1) reading Client (2) reading Server Application Client Session (1) Client Session (2) Server Session Shared Cache

  20. Client Write Access Client (1) reading Client (2) editing Unit of Work Cache Server Application Client Session (1) Client Session (2) Server Session Shared Cache

  21. Native Meta Model DatabasePlatform Session Project (Map) ServerPlatform * ClassDescriptor Class javaClass Policies InstantiationClone/CopyInheritanceLockingSequencing… * Mapping attributeName

  22. Default Cache Behavior 2. SQL Query QueryFramework 1. OO Query 3. Results 4. Does PK for row exist in cache? 5. NO: Build bean/object from results Cache 6. Return object results 5. YES: Get from cache

  23. Identity Map Identity map for person Person1 1 Session Person2 2 PersonN N Identity mapfor address Identity map is indexed by primary key

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