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ORMs review

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Brief review of current Java ORM solutions

Brief review of current Java ORM solutions

Published in: Technology

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Transcript

  • 1. Java ORMs
    • Vitalii Tymchyshyn (tivv00@gmail.com)
    JPA JDO MyBatis Small ORMs
  • 2. JPA
    • J2EE standard
    • 3. Own query languages
    • 4. Attached beans
    • 5. The most popular thing
  • 6. JPA implementations
    • Hibernate – the thing standard evolved from
    • 7. TopLink – Oracle's implementation
    • 8. Cayenne – Mature Apache JPA implementation
    • 9. OpenJPA – The same :)
    • 10. EclipseLink – JPA 2.0 RI, Stored Procedures mappings, bytecode enhancements
    • 11. DataNucleus Access Platform – JPA & JDO
  • 12. JDO vs JPA
    • JDO has single implementation of the latest standard
    • 13. JDO is not so tied to RDBMS ( db4o, NeoDatis, LDAP, Excel XLS, Excel OOXML, ODF, XML, JSON, Google BigTable, HBase, Amazon S3, MongoDB, GoogleStorage, Cassandra, OrientDB, Salesforce.com )
    • 14. JDO uses bytecode enhancement, JPA uses proxies
    • 15. JDO claims to support more features then JPA
    • 16. JPA is much more popular
  • 17. JDO implementations
  • 21. MyBatis
    • Was iBatis
    • 22. Main idea: write a query for each DAO call and define POJO mappings
    • 23. No JPA ”magic” you often look workarounds for
    • 24. No JPA ”magic” to perform simple things instead of you yourself.
  • 25. Small ORMs
    • Julp – ultra light, similar to basic MyBatis
    • 26. jOOQ – creates objects from DB schema and provides OO API to db
    • 27. ActiveObjects, OrmLite, Avaje Ebean – simplistic JPA-like