About Object Database

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Manual
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Auto Generated Values

number generator for every database. This number generator is used to generate automatic object IDs for entity objects with no primary key fields defined (as explained in the previous section). The same ... a primary key for every new entity object. These generated values are unique at the database level
Tutorial
13

Step 4: Add a Servlet Class

the next tutorial step) - a new Guest entity object is constructed and stored in the database. All the Guest entity objects are retrieved from the database and stored in the request's "guest" attribute ... ServletException, IOException { // Obtain a database connection: EntityManagerFactory
Tutorial
13

Step 4: Add a Servlet Class

is constructed and stored in the database. All the Guest entity objects are retrieved from ... { // Obtain a database connection: EntityManagerFactory emf = (EntityManagerFactory ... ") .forward(request, response); } finally { // Close the database
Manual
13

Chapter 6 - Configuration

The ObjectDB configuration file contains one root element with seven subelements: ... <database> ... database> ... ... ... ... ...
JPA Doc
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javax.persistence.EntityManager

void refresh(Object entity) Refresh the state of the instance from the database, overwriting changes ... - if the entity no longer exists in the database Since: JPA 2.0 void refresh(Object entity, LockModeType ... database. Since: JPA 1.0 See Also: Query TypedQuery CriteriaQuery PersistenceContext Learn how to use
Tutorial
12

Step 2: Define a JPA Entity Class

To store objects in an ObjectDB database using JPA we need to define an entity class: Open the [New ... to create the new class. The new class should represent Guest objects in the database. Use copy ... + ")"; } }  The new class should represent Guest objects in the database. Besides the @Entity
Tutorial
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Step 2: Entity Class and Persistence Unit

To store objects in an ObjectDB database using JPA we need to define an entity class: Open the [New ... provider with the specified database url. The next step is adding an EJB Session Bean that will manage Guest entity objects. ... the [Provider and Database] step just click Finish to generate a default persistence.xml file
Tutorial
12

Step 2: Entity Class and Persistence Unit

To store objects in an ObjectDB database using JPA we need to define an entity class: Open the [New ... to create the new class. A new class that should represent Guest objects in the database was created in ... database url. The next step is adding an EJB Session Bean that will manage Guest entity objects.
Tutorial
12

Step 2: Entity Class and Persistence Unit

To store objects in an ObjectDB database using JPA we need to define an entity class: Open the [New ... the [Provider and Database] step click Finish to generate a default persistence.xml file ... fill the fields with arbitrary values to enable it. A new entity class that should represent Guest objects in
Tutorial
12

Step 2: Entity Class and Persistence Unit

To store objects in an ObjectDB database using JPA we need to define an entity class: Right click ... that should represent Guest objects in the database was created in the project (under Java Resources ... guests in the database. We also need to configure JPA by setting a META-INF/persistence.xml file