Object-relational (O/R) mapping

For simple applications, it is sufficient to use straight JDBC calls to persist objects in a persistent storage. However, when the object graph of the business layer becomes more complex, using straight JDBC calls becomes very difficult to maintain. This is due to a mismatch between the object graph and your relational schema.

  • In this course, the problems that come with the mismatch will be explained.
  • In order to create a mapping between these two worlds, one could decide to build it's own framework. However, there are already several frameworks available on the market such as EJB's and JDO.
  • Therefore, an overview of existing object-relational mapping frameworks is given, together with an overview of the important aspects of such frameworks.

Schedule a training?

Delivered as a live, interactive training: available in-person or online, or in a hybrid format. Training can be implemented in Dutch, English, or French.

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Public training calendar

No public sessions are currently scheduled. We will be pleased to set up an on-site course or to schedule an extra public session (in case of a sufficient number of candidates). Interested? Please let us know.

Intended for

Architects, database administrators and developers.

Background

The participants must have knowledge of OO (see course OO concepts and techniques) and relational systems (see course SQL and relational databases fundamentals). Knowledge of JDBC is an advantage (see course JDBC).

You can test yourself to see if you have enough background by filling out the on-line self-test "OO concepts" and the online selftest "SQL fundamentals".

Main topics

  • Object-relational mapping problems:
    • Database-driven versus object-driven
    • Relations • inheritance • single row versus set processing
    • Caching • transparent persistence • performance
  • Techniques and frameworks for persistence:
    • Enterprise Java Beans (EJB)
      Overview of EJB • container managed vs. bean managed persistence
    • Java Data Objects (JDO)
    • Other common Java O/R mapping frameworks
  • Patterns for database processing:
    • Overview • examples of read patterns • examples of persistence patterns

Training method

The theoretical foundation is illustrated with practical examples.

Certificate

At the end of the course session, the participant receives a 'Certificate of Completion'.

Duration

a half day.

Course leader

an ABIS instructor.


SESSION INFO AND ENROLMENT