350 | JPA Persistence UnitA JPA Persistence Unit is a logical grouping of user defined persistable classes (entity classes, embeddable classes and mapped superclasses) with related settings. Defining a persistence unit is optional when using ObjectDB, but required by JPA. persistence.xml Persistence units are defined in |
66 | Step 2: Entity Class and Persistence Unit with a default persistence unit (that will be configured later). If the Finish button is disabled ... + ")"; } } A default JPA persistence unit (with default settings) was generated in a persistence.xml ... /xml/ns/persistence/persistence_2_0.xsd"> <persistence-unit name="GuestbookPU" transaction-type |
66 | Step 2: Entity Class and Persistence Unit with a default persistence unit (that will be configured later). If the Finish button is disabled ... + ")"; } } A default JPA persistence unit (with default settings) was generated in a persistence.xml file ... .com/xml/ns/persistence/persistence_2_0.xsd"> <persistence-unit name="GuestbookPU" transaction |
65 | Step 2: Entity Class and Persistence Unit/persistence http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd"> <persistence-unit ... ="javax.persistence.jdbc.password" value="admin"/> </properties> </persistence-unit ... .persistence.Entity; import javax.persistence.GeneratedValue; import javax.persistence.Id; @Entity |
65 | Step 2: Entity Class and Persistence Unit/persistence_2_0.xsd"> <persistence-unit name="GuestbookPU" transaction-type="JTA"> <provider>com ... > </persistence-unit> </persistence> Now ObjectDB should be used as a JPA provider with the specified ... .Date; import javax.persistence.Entity; import javax.persistence.GeneratedValue; import javax |
57 | Database Connection using JPA of the createEntityManagerFactory method takes a map of persistence unit properties as a second parameter: Map<String ... of a persistence unit. As an extension, ObjectDB enables specifying a database URL (or path) directly, bypassing the need for a persistence unit. Any string that starts with objectdb: or ends with .odb or |
43 | Storing JPA Entity Objects"> <persistence-unit-metadata> <persistence-unit-defaults> <cascade-persist/> </persistence-unit-defaults> </persistence-unit-metadata> </entity-mappings> The mapping file ... explicitly in the persistence unit definition (in persistence.xml). Batch Store Storing a large number |
38 | JPA Persistable TypesThe term persistable types refers to data types that can be used for storing data in the database. ObjectDB supports all the JPA persistable types, which are: User defined classes - Entity classes ... can be stored in the database directly. Other persistable types can be embedded in entity classes as fields |
8 | Constants.PMF_ATTRIBUTE_PERSISTENCE_UNIT_NAMEStatic Field javax.jdo.Constants String PMF_ATTRIBUTE_PERSISTENCE_UNIT_NAME The name of the persistence manager factory element's "persistence-unit-name" attribute. Since: JDO 2.1 |
8 | Constants.PROPERTY_PERSISTENCE_UNIT_NAMEStatic Field javax.jdo.Constants String PROPERTY_PERSISTENCE_UNIT_NAME "javax.jdo.option.PersistenceUnitName" Since: JDO 2.1 See Also: PersistenceManagerFactory.getPersistenceUnitName() |
