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1-10 of 200 resultsRefreshJPA Criteria API Queries The JPA Criteria API provides an alternative way for defining JPA queries ... > JPA Criteria API vs JPQL JPQL queries are defined as strings, similarly to SQL. JPA criteria queries, on the other hand, are defined by the instantiation | |
JPA Metamodel API The JPA Metamodel API provides the ability to examine the persistent object model ... > The Metamodel Interface The main interface of the JPA Metamodel API is jpa/metamodel/Metamodel">Metamodel. It can be obtained either by the | |
JPA Entity Fields, persistent and inverse fields) can be used in both jpa/entity/types#entity_classes">entity classes and jpa/entity/types#embeddable_classes">embeddable classes ... > Primary key fields are discussed in the jpa | |
Setting and Tuning of JPA Queries The jpa/Query">Query and jpa/TypedQuery">TypedQuery interfaces define various setting and tuning methods that may affect jpa/query/execute">query execution if invoked before a query | |
Locking in JPA JPA 2 supports both optimistic locking and pessimistic locking ... to the same data by two concurrent users. Locking in ObjectDB (and in JPA) is always at the database ... > When using ObjectDB, optimistic locking is jpa/setting/database#the_locking | |
Storing JPA Entity Objects the jpa/EntityManager/persist_Object">persist method or implicitly as ... ", "Wurzelbacher"); em.jpa/EntityManager/getTransaction">getTransaction().jpa/EntityTransaction/begin">begin(); em.jpa/EntityManager/persist | |
CRUD Database Operations with JPA Given an jpa/EntityManager">EntityManager, em, that represents a JPA connection to the object database, we can use ... > em.jpa/EntityManager/getTransaction">getTransaction | |
Database Connection using JPA Working with the Java Persistence API (JPA) consists of using the following interfaces ... to a database is represented by an jpa/EntityManager">EntityManager instance, for every HTTP request. The main role of an jpa | |
Retrieving JPA Entity Objects The Java Persistence API (JPA) provides various ways to retrieve objects from ... the content of the database. The jpa/persistence/managed#the_persistence ... that is retrieved from the database (or from the jpa/persistence/cache">L2 cache | |
JPA Persistable Types for storing data in the database. ObjectDB supports all the JPA persistable types, which are: jpa/entity/fields">fields. In addition ... times. Referencing instances of other persistable types from multiple jpa |