5 | Index DefinitionQuerying without indexes requires iteration over entity objects in the database one by one. This may take a significant amount of time if many entity objects have to be examined. Using proper indexes ... . When an entity object is stored in the database every indexed field must contain either null or |
5 | JPA Named Queries" that retrieves all the Country objects in the database: @NamedQuery(name="Country.findAll", query ... classes that have objects in the database. However, an attempt to use a named query still might fail |
1 | Step 2: Define a JPA Entity ClassTo store objects in an ObjectDB database using JPA we need to define an entity class: Right click on the project in the [Package Explorer] window and select New > Class. Enter tutorial as the package ... objects in the database. Apart from the @Entity annotation and the id field (and its annotations |
1 | Step 2: Define a JPA Entity ClassTo store objects in an ObjectDB database using JPA we need to define an entity class: Open the [New Java Class] dialog box, e.g. by right clicking the tutorial package node (in the [Projects] window ... ("(%d, %d)", this.x, this.y); } } The new class should represent Point objects in the database |
1 | NetBeans/JPA Web Application TutorialThis is the NetBeans version of the JPA Web App tutorial. It demonstrates how to create and run a database driven Java web application in NetBeans - using Tomcat 6 Apache Tomcat Server 6.0 (some ... in an ObjectDB database. Required Software For this tutorial you will need the following software |
1 | Step 7: Run the Spring Web App without specifying a Java agent. Since we are using ObjectDB in embedded mode - the database file is created under the Tomcat directory. You can stop the Tomcat server and open the database file in ObjectDB |
1 | JPA TutorialsThe following tutorials demonstrate how to develop database driven applications using JPA and the ObjectDB ODBMS (Object Oriented Database Management System). Console JPA Tutorial The Quick Start tutorial demonstrates how to use ObjectDB and JPA in a console application: Quick Start with JPA |
1 | Step 6: Run the Java EE 6 Application - the database file is created under the GlassFish directory (e.g. at domains\domain1\eclipseApps\Guestbook\WEB-INF). You can stop the GlassFish server and open the database file in ObjectDB Explorer |
1 | Step 6: Run the Web Application - the database file is created under the Tomcat directory. You can stop the Tomcat server and open the database file in ObjectDB Explorer: This is the end of the tutorial. Learn more about ObjectDB and JPA by reading the Manual. |
1 | Eclipse/JPA Web Application TutorialThis is the Eclipse version of the JPA Web App tutorial. It demonstrates how to create and run a database driven Java web application in Eclipse - using Tomcat 6, ObjectDB and JPA. The demo web ... entity objects are stored in an ObjectDB database. Required Software For this tutorial you will need |
