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6

Database Explorer

it from the command line as follows: > java -jar explorer.jar If explorer.jar is not in the current ... . Bookmarked entity objects can be accessed from the [Database] tabbed window. Editing Database Content ... deletes the object itself from the database. Editing Collections Elements can be added to collections
5

Database Management Settings

, the recovery file can be used to fix the database. Recovery from failure is automatically applied by ObjectDB ... are generated by running the Activator utility: > java -cp objectdb.jar com.objectdb.Activator from ... Enhancer (when using the OEM license) are signed and excluded from evaluation restrictions
5

Logical Operators in JPQL and Criteria API

retrieves countries whose population and area (both) exceed specified limits: SELECT c FROM ... The following query retrieves countries whose population or area exceeds a specified limit: SELECT c FROM ... retrieves all the countries whose population does not exceed a specified limit: SELECT c FROM
5

Chapter 6 - Configuration

, the configuration file is loaded from $objectdb/objectdb.conf where $objectdb represents the ObjectDB home ... from the location of the objectdb.jar file. It is defined as the path to the directory in ... file is loaded from $objectdb/objectdb.conf. You can specify an alternative path by setting
1

Step 4: Add a Servlet Class

FROM Guest g", Guest.class).getResultList(); request.setAttribute("guests", guestList ... : The EntityManagerFactory is retrieved from the application scope attribute, and then an EntityManager ... the database. All the Guest entity objects are retrieved from the database and stored in the request's
1

Step 3: Define an EJB Session Bean

() { TypedQuery<Guest> query = em.createQuery( "SELECT g FROM Guest g ORDER BY g.id", Guest ... - for retrieving all the existing Guest objects from the database. EJB classes are only supported by Java EE ... and Jetty. By using EJB classes we can move some work from the application to the EJB container (i.e
1

Step 3: Define a Spring DAO Component

= em.createQuery( "SELECT g FROM Guest g ORDER BY g.id", Guest.class); return ... Guest objects from the database. By using Spring components we can move some work from
1

Step 3: Define a Spring DAO Component

( "SELECT g FROM Guest g ORDER BY g.id", Guest.class); return query ... from the database. By using Spring components we can move some work from the application to the Spring
1

Step 3: Define an EJB Session Bean

> getAllGuests() { TypedQuery<Guest> query = em.createQuery( "SELECT g FROM Guest g ... the database. getAllGuests - for retrieving all the existing Guest objects from the database. EJB classes ... containers, such as Tomcat and Jetty. By using EJB classes we can move some work from the application
0

javax.jdo.spi.PersistenceCapable.ObjectIdFieldManager

(int fieldNumber) Fetch one field from the field manager. Fetch one field from the field manager ... byte fetchByteField(int fieldNumber) Fetch one field from the field manager. Fetch one field from ... the ObjectId. Since: JDO 1.0 char fetchCharField(int fieldNumber) Fetch one field from the field manager

Getting Started

ObjectDB is very easy to use. Follow the Getting Started Tutorial and the Quick Tour manual chapter and in minutes you may be able to write and run first Java programs against ObjectDB.

Prior knowledge or experience in database programming (SQL, JDBC, ORM, JPA, etc.) is not required, but some background in using the Java language is essential.

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