About persistence

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Manual
219

JPA Persistence Unit

A 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
Tutorial
216

Step 2: Entity Class and Persistence Unit

) and selecting New > Entity Class... (or New > Other... > Persistence > Entity Class and clicking ... the [Provider and Database] step just click Finish to generate a default persistence.xml file with a default persistence unit (that will be configured later). If the Finish button is disabled
Tutorial
216

Step 2: Entity Class and Persistence Unit

) and selecting New > Entity Class... (or New > Other... > Persistence > Entity Class and clicking ... the [Provider and Database] step click Finish to generate a default persistence.xml file with a default persistence unit (that will be configured later). If the Finish button is disabled
Tutorial
214

Step 2: Entity Class and Persistence Unit

.persistence.Entity; import javax.persistence.GeneratedValue; import javax.persistence.Id; @Entity ... ; // Persistent Fields: @Id @GeneratedValue Long id; private String name ... guests in the database. We also need to configure JPA by setting a META-INF/persistence.xml file
Tutorial
214

Step 2: Entity Class and Persistence Unit

.Date; import javax.persistence.Entity; import javax.persistence.GeneratedValue; import javax.persistence.Id; @Entity public class Guest implements Serializable { private static final long serialVersionUID = 1L; // Persistent Fields: @Id @GeneratedValue Long id
Manual
214

JPA Persistable Types [2019-08-10]

The term persistable types refers to data types that can be used in 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. In
Manual
214

JPA Persistable Types [2019-08-10]

The term persistable types refers to data types that can be used in 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. In
Manual
214

JPA Persistable Types

The term persistable types refers to data types that can be used in 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. In
Manual
214

JPA Persistable Types [2016-08-06]

The term persistable types refers to data types that can be used in 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. In
Manual
214

JPA Persistable Types [2019-08-03]

The term persistable types refers to data types that can be used in 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. In