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JPA Lifecycle Events

Callback methods are user defined methods that are attached to entity lifecycle events and are invoked automatically by JPA when these events occur. Internal Callback Methods Internal callback methods are methods that are defined within an entity class. For example, the following entity class
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Database Management Settings

. Therefore, when ObjectDB runtime is bundled in a product that uses only signed enhanced persistable classes - activation by end users is unnecessary.
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JPA Entity Fields

Fields of persistable user defined classes (entity classes, embeddable classes and mapped superclasses) can be classified into the following five groups: Transient fields Persistent fields Inverse (Mapped By) fields Primary key (ID) fields Version field The first three groups (transient, persistent
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ObjectDB License Agreement [ver. 2.0.4]

that guarantees that any user of the Product and the embedded Software will be committed to the terms
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JPA Queries

only at runtime (e.g. depending on which fields are filled by a user in a form) can be done by
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ObjectDB License

of end users. For a quote please contact ObjectDB Sales (sales@objectdb.com). Educational License
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DELETE Queries in JPA/JPQL

queries can only be executed within an active transaction and the changes are visible to other users
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Step 2: Entity Class and Persistence Unit

.jdbc.user" value="admin"/> <property name="javax.persistence.jdbc.password" value="admin
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Step 3: Create an ObjectDB Data Source

. objectdb://localhost/points.odb;user=admin;password=admin). You may click the Test Connection button
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Step 2: Entity Class and Persistence Unit

/guests.odb"/> <property name="javax.persistence.jdbc.user" value="admin"/> <property name

Getting Started

ObjectDB is very easy to use. Follow the Getting Started Tutorial and the Quick Tour manual chapter and in minutes you may be able to write and run first Java programs against ObjectDB.

Prior knowledge or experience in database programming (SQL, JDBC, ORM, JPA, etc.) is not required, but some background in using the Java language is essential.

Need Help?

  1. Search ObjectDB website
  2. Read the FAQ
  3. Follow the Tutorials
  4. View or post in the forum
  5. Search or file an issue
  6. Contact support