Fast Object Database for Java - with JPA/JDO support

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Company

persistence solution for Java, based on the Java Persistence API (JPA) and the Java Data Objects (JDO ... Ltd United Kingdom Unit 632 109 Vernon House Friar Lane Nottingham NG1 6DQ United Kingdom +44 (0) 330
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JPA Metamodel API

(); If managed classes are not listed in the persistence unit (which is optional when using ObjectDB ... can also be used with types that are still unknown to ObjectDB (not listed in the persistence unit ... The JPA Metamodel API provides the ability to examine the persistent object model and retrieve
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Posting Sample Code

over JUnit). Use embedded mode to connect to the ObjectDB database directly (no persistence unit ... contain a persistence unit, An entity or IdClass class should implement the java.io.Serializable interface). ... ; import java.util.*; import javax.persistence.*; public final class MyTestCase {     public
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Setting and Tuning of JPA Queries

to local): For the entire persistence unit - using a persistence.xml property:     persistence.query.timeout" - sets maximum ... . "javax.persistence.lock.timeout" - sets maximum waiting time for pessimistic locks, when pessimistic
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Persistence()

Constructor javax.persistence.Persistence Persistence() Since: JPA 1.0
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Persistence.PERSISTENCE_PROVIDER

Static Field javax.persistence.Persistence String PERSISTENCE_PROVIDER Deprecated. This final String is deprecated and should be removed and is only here for TCK backward compatibility Since: JPA 1.0
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Locking in JPA

can be set in several scopes: For the entire persistence unit - using a persistence.xml property:             persistence.lock.timeout" hint
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Step 2: Define a JPA Entity Class

that a persistence unit definition in an XML file is missing. This is discussed in the ObjectDB Manual ... code: package guest; import java.io.Serializable; import java.sql.Date; import javax.persistence.Entity; import javax.persistence.GeneratedValue; import javax.persistence.Id; @Entity public
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javax.jdo.JDOHelper

PersistenceManagerFactory or persistence unit. Returns a named PersistenceManagerFactory or persistence unit. Parameters ... PersistenceManagerFactory or persistence unit. Returns a named PersistenceManagerFactory or persistence ... loader) Returns a named PersistenceManagerFactory or persistence unit. Returns a named
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Step 2: Define a JPA Entity Class

.Serializable; import javax.persistence.*; @Entity public class Point implements Serializable ... is an ordinary Java class. The warning that NetBeans displays on the Guest class indicates that a persistence unit definition in an XML file is missing. This is discussed in the ObjectDB Manual

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?

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