 3 | Upgrade - Step By Step To upgrade an existing application that uses ObjectDB 1.0 to ObjectDB 2.0 ... . ObjectDB 2.0 uses optimistic transactions by default (the default was datastore transactions in ... as in ObjectDB 1.0), either by annotation (@Embeddable) or by external XML metadata ( |
3 | An ObjectDB database can be backed up by simply copying or archiving the database file while the database is offline (i.e. when it is not open in an ObjectDB server and not in use by any application ... Backup The online backup can be started by executing a special query on an EntityManager (em |
3 | ",
query="select g from guest.Guest g order by g.name"
) } )
@Stateless
@TransactionManagement ... );
TypedQuery query = this.em.createQuery( "select g from guest.Guest g order by g.name ... ="select g from guest.Guest g order by g.name"
) } ) ...
// NamedQuery does not work
// TypedQuery |
3 | Method javax.jdo.PersistenceManager Date getServerDate() Get the Date as seen by the server. Clients using this method can order their operations according to a single time source. Implementations ... on the server. Returns: a Date instance corresponding to the UTC Date as seen by the server Since: JDO 2.1 |
3 | the name of the attribute that is being overridden by order to specify it as part of the map key or ... field or property to override a basic mapping or id mapping defined by the mapped superclass or |
3 | property to specify the behavior when data is retrieved by the find methods and by queries. Since: JPA 2 ... ())
System.out.println(c) Returns: an array containing the constants of this enum type, in the order they are declared |
3 | to the processing of the query. The persistence provider implementation may achieve this by flushing those entities to the database or by some other means. If FlushModeType.COMMIT is set, the effect ... ())
System.out.println(c) Returns: an array containing the constants of this enum type, in the order they are declared |
3 | order to learn how to use JPA and ObjectDB please read the ObjectDB manual. |
3 | This tutorial demonstrates how to create reports based on data in an ObjectDB database using the popular open source Business Intelligence and Reporting Tools (BIRT). In order to keep things as simple as possible - we will use the basic points.odb ObjectDB database file from the Getting Started |
3 | In this step we will add code to the Main class (that was generated with the project) in order to store Point objects in the database and then retrieve them from the database. Use copy and paste to replace the content of the Main class with the following content:
package tutorial;
import javax |