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Tutorial
9

Step 3: Add a Context Listener Class

The Guest entity objects will be stored in an ObjectDB database, which will be represented by ... a ServletContextListener to perform initialization and cleanup operations: The database will be opened (or created ... . The database will be closed when the web application stops (or when the web server shuts down), by
Tutorial
9

Step 3: Add a Context Listener Class

The Guest entity objects will be stored in an ObjectDB database, which will be represented by ... a ServletContextListener to perform initialization and cleanup operations: The database will be opened (or created ... . The database will be closed when the web application stops (or when the web server shuts down), by
Manual
9

WHERE clause (JPQL / Criteria API)

JPQL query that retrieves selective objects from the database. Out of the four optional clauses ... of this query defines an iteration over all the Country objects in the database using the c range ... the WHERE predicate. For entity classes with millions of objects in the database there is a huge
JPA Doc
9

javax.persistence.EntityManager

database. Since: JPA 1.0 See Also: Query TypedQuery CriteriaQuery PersistenceContext Learn how to use ... entities to become detached. Changes made to entities that have not been flushed to the database will not ... if any (including removal of the entity), will not be synchronized to the database. Entities
Result
8

Activation completed successfully!

Your activation code is $activation_code. Insert an element at the end of the <database> element in the ObjectDB configuration file (objectdb.conf): <database> ... database> The activation code above is valid for one machine
Manual
8

Auto Generated Values

number generator for every database. This number generator is used to generate automatic object IDs ... a primary key for every new entity object. These generated values are unique at the database level ... . To minimize round trips to the database server, IDs are allocated in groups. The number of IDs in each
Result
8

Company

ObjectDB Software develops, markets and supports the ObjectDB Object-Oriented Database Management ... ) standards, since ObjectDB is the first object oriented database with built in support of JPA and JDO ... . When database performance matters - ObjectDB Software provides the most effective solution. ObjectDB Software
Manual
8

Detached Entity Objects

EntityManager but still represent objects in the database. Compared to managed entity objects, detached ... the database unless modified detached objects are merged back into an EntityManager to become managed ... transaction when merge is called because operations that might modify the database require an active
Manual
8

GROUP BY and HAVING clauses

clause. When a GROUP BY clause exists in a JPQL query, database objects (or tuples of database objects ... over all the Country objects in the database. The GROUP BY clause groups these Country objects by
Result
8

ObjectDB License

of a maximum of 10 entity classes and one million entity objects per database file. This could be useful ... on which ObjectDB databases are managed, but using ObjectDB on client machines merely to access remote ObjectDB databases (for which licenses have been purchased) does not require additional separate licenses