143 | JPA Persistence Unit is optional when using ObjectDB, but required by JPA. persistence.xml Persistence units are defined in a persistence.xml file, which has to be located in the META-INF directory in the classpath. One persistence.xml file can include definitions for one or more persistence units. The portable way |
41 | Storing JPA Entity Objects setting the ObjectDB configuration or in a JPA portable way, by specifying the cascade-persist XML element in the XML mapping file: <entity-mappings xmlns="http://java.sun.com/xml/ns/persistence/orm ... /ns/persistence/orm http://java.sun.com/xml/ns/persistence/orm_1_0.xsd" version="1.0 |
39 | 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 |
24 | Step 2: Entity Class and Persistence Unit the [Provider and Database] step just click Finish to generate a default persistence.xml file ... + ")"; } } A default JPA persistence unit (with default settings) was generated in a persistence.xml file that was added to the project (under Configuration Files). Open the persistence.xml file in |
24 | Step 2: Entity Class and Persistence Unit the [Provider and Database] step click Finish to generate a default persistence.xml file ... + ")"; } } A default JPA persistence unit (with default settings) was generated in a persistence.xml file ... the persistence.xml file in a text editor (by right clicking and selecting Edit or by double click |
23 | Step 2: Entity Class and Persistence Unit guests in the database. We also need to configure JPA by setting a META-INF/persistence.xml file ... the new META-INF folder in the [Project Explorer] window, select New > File, enter persistence.xml as file name and click Finish. Verify that a new persistence.xml file was created as shown below: Finally |
23 | Step 2: Entity Class and Persistence Unit/persistence.xml file: Open the [New Folder] dialog box, e.g. by right clicking the project node (in ... > File, enter persistence.xml as file name and click Finish. Verify that a new persistence.xml file ... to the persistence.xml file: <?xml version="1.0" encoding="UTF-8"?> <persistence version="2.0" xmlns="http |
22 | Step 6: Set the Spring XML of the Spring dispatcher servlet to the web.xml configuration file and to configure that servlet using another xml configuration file. Open the web.xml file (under Web Pages > WEB-INF) in a text editor (by right clicking and selecting Edit or by double click and then moving to the XML tab in the editor window |
22 | Step 6: Set the Spring XML of the Spring dispatcher servlet to the web.xml configuration file and to configure that servlet using another xml configuration file. Open the web.xml file (under src/main/webapp/WEB-INF) in a text editor (by ... tab in the editor window). Use copy and paste to replace the default content of the web.xml file |
8 | [ODB1] Chapter 3 - Persistent ClassesPersistent Classes are user defined classes whose instances can be stored in a database using JDO. Instances of these classes that represent objects in the database are called persistent objects or persistent instances. Objects that do not represent anything in the database (including instances |
