13 | Shared (L2) Entity Cache that it manages. The persistence context serves as a first level cache. An attempt to retrieve an entity object that is already managed by the EntityManager returns the existing instance from ... is one EntityManager. This section describes a level 2 (L2) cache of entity objects, which is managed |
13 | Updating JPA Entity Objects. If global cascade persist is enabled all the reachable entity objects that are not managed yet are also persisted. Automatic Change Tracking As shown above, an update is achieved by modifying a managed ... to managed entities automatically. One way to detect changes is to keep a snapshot of every managed object |
13 | JPA Persistence Unit explained below). The jar-file elements specify JAR files that should be searched for managed persistable classes. The class elements specify names of managed persistable classes (see below). The property ... on using XML metadata can be found in the JPA and JDO specifications and books. Managed Persistable |
13 | ObjectDB OverviewThe ObjectDB Object Database ObjectDB is a powerful Object-Oriented Database Management ... database management services (storage and retrieval, transactions, lock management, query processing ... Features 100% pure Java Object-Oriented Database Management System (ODBMS). No proprietary API - managed |
12 | What is ObjectDB?ObjectDB is an Object Oriented Database Management System (ODBMS). It provides all the standard database management services (storage and retrieval, transactions, lock management, query processing, etc.), but it uses an object oriented model to store and manage data. You can easily store ordinary |
12 | Database Connection using JPA. An EntityManagerFactory is constructed for a specific database, and by managing resources efficiently (e.g ... the content of a database require active transactions. Transactions are managed by an EntityTransaction ... and manages database transactions. Every EntityManager holds a single attached EntityTransaction instance |
10 | JPA Entity Fields and unrelated relationships are managed by the Employee and the Department classes, and the application is responsible to keep them synchronized. Inverse fields may improve efficiency when managing ... providers, ObjectDB always manages versions for entity objects, regardless of whether or not a version |
2 | Step 6: Set the Spring XML"/> </bean> <!-- Use @Transaction annotations for managing transactions --> <tx:annotation-driven transaction-manager="myTxManager" /> <!-- View resolver --> <bean class= "org ... , controllers and transactions), to inject a JPA EntityManager, to manage transactions and to look |
1 | javax.jdo.PersistenceManager to manage the life cycle of PersistenceCapable instances. A PersistenceManager is obtained from ... JDOUserException if the instance is transient or is managed by another PersistenceManager. Parameters: pc ... > persistenceCapableClass, boolean subclasses) The PersistenceManager manages a collection of instances |
1 | 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 field manager. This field will be stored in the proper field of the ObjectId. Parameters |
