94 | Best practice: Database update/migration of embedded databases in products is now held otherwise. The product store user data in the ObjectDB-Database. Example: V1.0: EntityPerson ... : [name=”Max Mustermann”; zip=”26135”; city=”Oldenburg”] How can we load the Database DB1 ... and stored in the database in their new form, you can remove the fields firstName and familyName from V2.0. support Support |
75 | 500Mb ObjectDb database opening issueHi, I have observed that 500 Mb objectDb database opening time is very slow (~3 seconds ... any way to speed-up open time for big databases? Definitely, it's too long for 500 Mb database! We gonna work with ObjectDb databases which may have size more than 5Gb and opening database time |
18 | Retrieving JPA Entity ObjectsThe Java Persistence API (JPA) provides various ways to retrieve objects from the database ... of the database. The persistence context serves as a cache of retrieved entity objects. If a requested ... with data that is retrieved from the database (or from the L2 cache - if enabled). The new entity object |
16 | Storing JPA Entity ObjectsNew entity objects can be stored in the database either explicitly by invoking the persist method ... an instance of the Employee entity class in the database: Employee employee = new Employee("Samuel ... and changes its state to Managed. The new entity object is stored in the database when the transaction |
15 | Working with JPA Entity Objects), which can represent physical objects in the database. Managing an ObjectDB Object Database using JPA ... database objects. Entity Object Life Cycle The life cycle of entity objects consists of four states ... the database. An entity object becomes Managed when it is persisted to the database |
15 | JPA Primary KeyEvery entity object that is stored in the database has a primary key. Once assigned, the primary key cannot be modified. It represents the entity object as long as it exists in the database. As an object database, ObjectDB supports implicit object IDs, so an explicitly defined primary key is not |
14 | JPA Persistable TypesThe term persistable types refers to data types that can be used for storing data in the database ... can be stored in the database directly. Other persistable types can be embedded in entity classes as fields ... persistent fields would cause data duplication in the database. Entity Classes An entity class |
2 | [ODB1] Chapter 1 - About ObjectDBObjectDB for Java/JDO is a powerful Object Database Management System (ODBMS) written entirely in Java. It can efficiently handle a wide range of database sizes, from a few KBs to hundreds of GBs ... of them. ObjectDB is an Object Database Developing object oriented applications with ObjectDB is easier |
1 | [ODB1] Chapter 8 - ObjectDB ServerAn ObjectDB server can manage one or more databases. Databases that are managed by a server ... these databases from remote machines by TCP/IP. More details about client server mode vs. embedded database mode are discussed in Section 1.2. Because the JDO API and the format of the database file |
1 | [ODB1] Chapter 3 - Persistent ClassesPersistent Classes are user defined classes whose instances can be stored in a database using JDO. Instances of these classes that represent objects in the database are called persistent objects or persistent instances. Objects that do not represent anything in the database (including instances |
