ObjectDB Database Search

Jakarta Persistence (JPA) Interface jakarta.persistence. EntityManagerFactory Super Interfaces ... . An EntityManagerFactory with a lifecycle managed by the application may be created using the static operations ... , there is exactly one EntityManagerFactory for each persistence unit: // create a factory at initialization time

Jakarta Persistence (JPA) Method in jakarta.persistence. EntityManagerFactory T unwrap (   ... . If the provider implementation of EntityManagerFactory does not support the given type ... either the underlying class implementing EntityManagerFactory or an interface it implements. Returns

Jakarta Persistence (JPA) Method in jakarta.persistence. EntityManagerFactory void close() Close ... , all methods invoked on it will throw the IllegalStateException , except for EntityManagerFactory .isOpen , which will return false. Once an EntityManagerFactory has been closed, all its entity managers

Jakarta Persistence (JPA) Method in jakarta.persistence. EntityManagerFactory void addNamedEntityGraph (    String graphName ,    EntityGraph entityGraph ) Add a named copy of the given EntityGraph to this EntityManagerFactory . If an entity graph with the given name

Jakarta Persistence (JPA) Method in jakarta.persistence. EntityManagerFactory Map getNamedQueries (    Class resultType ) Type Parameters: - the specified upper bound on the query result types A map keyed by query name , containing references to every named query whose result type

Jakarta Persistence (JPA) Method in jakarta.persistence. EntityManagerFactory Map getNamedEntityGraphs (    Class entityType ) Type Parameters: - the specified upper bound on the entity graph types A map keyed by graph name , containing every named entity graph whose entity type

Jakarta Persistence (JPA) Method in jakarta.persistence. EntityManagerFactory void runInTransaction (    Consumer work ) Create a new application-managed EntityManager with an active transaction, and execute the given function, passing the EntityManager to the function. If the transaction

Jakarta Persistence (JPA) Method in jakarta.persistence. EntityManagerFactory PersistenceUnitTransactionType getTransactionType() The type of transaction management used by this persistence unit, either resource-local transaction management, or JTA. Since: Jakarta Persistence (JPA) 3.2

Jakarta Persistence (JPA) Method in jakarta.persistence. EntityManagerFactory SchemaManager getSchemaManager() Return interface providing access to schema management operations for the persistence unit. Returns: an instance of SchemaManager . Throws: IllegalStateException - if the entity manager

Jakarta Persistence (JPA) Method in jakarta.persistence. EntityManagerFactory void addNamedQuery (    String name ,    Query query ) Define the query, typed query, or stored procedure query as a named query such that future query objects can be created from it using

Jakarta Persistence (JPA) Method in jakarta.persistence. EntityManagerFactory R callInTransaction (    Function work ) Create a new application-managed EntityManager with an active transaction, and call the given function, passing the EntityManager to the function. If the transaction type

Jakarta Persistence (JPA) Method in jakarta.persistence. EntityManagerFactory EntityManager createEntityManager() Create a new application-managed EntityManager . This method returns a new EntityManager instance each time it is invoked. The EntityManager.isOpen method will return true

Jakarta Persistence (JPA) Method in jakarta.persistence. EntityManagerFactory EntityManager createEntityManager (    Map map ) Create a new application-managed EntityManager with the given Map specifying property settings. This method returns a new EntityManager instance each time

Jakarta Persistence (JPA) Method in jakarta.persistence. EntityManagerFactory EntityManager createEntityManager (    SynchronizationType synchronizationType ) Create a new JTA application-managed EntityManager with the specified synchronization type. This method returns a new

Jakarta Persistence (JPA) Method in jakarta.persistence. EntityManagerFactory EntityManager createEntityManager (    SynchronizationType synchronizationType ,    Map map ) Create a new JTA application-managed EntityManager with the specified synchronization type and map

Jakarta Persistence (JPA) Method in jakarta.persistence. EntityManagerFactory String getName() The name of the persistence unit. Since: Jakarta Persistence (JPA) 3.2

Jakarta Persistence (JPA) Method in jakarta.persistence. EntityManagerFactory Map getProperties() Get the properties and associated values that are in effect for the entity manager factory. Changing the contents of the map does not change the configuration in effect. Returns: properties. Throws

Jakarta Persistence (JPA) Method in jakarta.persistence. EntityManagerFactory Cache getCache() Access the cache that is associated with the entity manager factory (the "second level cache"). Returns: an instance of Cache , or null if there is no second-level cache in use. Throws

Jakarta Persistence (JPA) Method in jakarta.persistence. EntityManagerFactory PersistenceUnitUtil getPersistenceUnitUtil() Return interface providing access to utility methods for the persistence unit. Returns: an instance of PersistenceUnitUtil . Throws: IllegalStateException - if the entity

Jakarta Persistence (JPA) Method in jakarta.persistence. EntityManagerFactory CriteriaBuilder getCriteriaBuilder() Return an instance of CriteriaBuilder which may be used to construct CriteriaQuery objects. Returns: an instance of CriteriaBuilder . Throws: IllegalStateException - if the entity

Jakarta Persistence (JPA) Method in jakarta.persistence. EntityManagerFactory Metamodel getMetamodel() Return an instance of the Metamodel interface for access to the metamodel of the persistence unit. Returns: an instance of Metamodel . Throws: IllegalStateException - if the entity manager factory has been closed. Since: Jakarta Persistence (JPA) 2.0

Jakarta Persistence (JPA) Method in jakarta.persistence. EntityManagerFactory boolean isOpen() Indicates whether the factory is open. Returns true until the factory has been closed. Returns: boolean indicating whether the factory is open. Since: Jakarta Persistence (JPA) 1.0

of an EntityManagerFactory instance is to create EntityManager instances. An EntityManagerFactory is constructed ... of the EntityManagerFactory itself might be less efficient, but it is a one-time operation ... . EntityManagerFactory An EntityManagerFactory instance is obtained by using a static factory method

with annotations), JPA follows a hierarchical override model: EntityManagerFactory (global ... Defines the scope of a pessimistic lock: NORMAL or EXTENDED . Usage EntityManagerFactory Set the PersistenceConfiguration.LOCK_SCOPE property when you create the EntityManagerFactory , or set "jakarta

content also require an EntityTransaction instance. Obtaining an EntityManagerFactory Obtaining an EntityManager instance is a two-step process. First, you obtain an EntityManagerFactory instance ... you to define a persistence unit generate an EntityManagerFactory . However, with ObjectDB

a second-level (L2) cache of entities, which is managed by the EntityManagerFactory and shared by ... and the EntityManagerFactory 's L2 cache, which are managed on the client side, ObjectDB also manages ... and are shared by all EntityManagerFactory and EntityManager instances for that database

. EntityManagerFactory ; import jakarta.persistence.PersistenceConfiguration; // ... // Create a programmatic ... .class) .managedClass(sample.MyEntity2.class); // Instantiate the EntityManagerFactory using the configuration object: EntityManagerFactory emf = Persistence.createEntityManagerFactory(config); Using 

the container to inject EntityManager or EntityManagerFactory proxies directly into application components ... . EntityManagerFactory injection Inject an EntityManagerFactory using these annotations: Expresses a dependency on an EntityManagerFactory , useful for creating EntityManagers manually or accessing factory

this case, you can access the master database as follows: EntityManagerFactory emf = Persistence ... database requires a slightly different URL: EntityManagerFactory emf = Persistence ... , you can also use a composite URL: EntityManagerFactory emf = Persistence.createEntityManagerFactory( "objectdb

: For an EntityManagerFactory , use the createEntityManagerFactory method: Map properties = new HashMap(); properties.put("jakarta.persistence.query.timeout", 4000); EntityManagerFactory emf = Persistence

. Use its static methods to create an EntityManagerFactory as the first step for accessing ... obtained from EntityManagerFactory . It provides methods to inspect identifiers and version

products . Connection Pooling Automatic connection pool managed by EntityManagerFactory ... entity data cache  (per EntityManagerFactory ). Database file page cache . Query program cache

;an EntityManagerFactory , use the createEntityManagerFactory method: Map properties = new HashMap(); properties.put("jakarta.persistence.lock.timeout", 2000); EntityManagerFactory emf = Persistence

. Retrieve it by result type from EntityManagerFactory .getNamedQueries , and use it to get a TypedQuery instance via EntityManager.createQuery .

; EntityManagerFactory or   EntityManager  using the getCriteriaBuilder method. Additional

API is Metamodel . You can obtain an instance from either the EntityManagerFactory 's getMetamodel

the EntityManagerFactory and shared by all its EntityManager instances. To disable the level-2 cache, specify 0 or 0mb

; EntityManagerFactory emf =             Persistence

, PostLoad ). Configures the injection of EntityManager and EntityManagerFactory resources in Jakarta EE

for Criteria queries and their elements. You can get an instance from either the EntityManagerFactory 's

EntityManager . ObjectDB also manages a level 2 (L2) shared cache for the EntityManagerFactory

the EntityManagerFactory . The getIdentifier method takes one argument, a managed entity, and returns the primary key

EntityManagerFactory instance with a global application scope. We have to register ... if not existing yet) when the web application starts, by instantiating an EntityManagerFactory ... the EntityManagerFactory . To register a ServletContextListener : Open the [New Listener] dialog box

EntityManagerFactory instance with a global application scope. We have to register ... if not existing yet) when the web application starts, by instantiating an EntityManagerFactory ... closing the  EntityManagerFactory . To register a ServletContextListener : Open the [New File

, IOException { // Obtain a database connection: EntityManagerFactory emf = ( EntityManagerFactory ... ); } } GuestServlet performs the following operations on every http request: The EntityManagerFactory

: EntityManagerFactory emf = ( EntityManagerFactory )getServletContext().getAttribute("emf"); EntityManager em ... on every http request: The EntityManagerFactory is retrieved from the application scope attribute

yet): EntityManagerFactory emf = Persistence.createEntityManagerFactory(       

a database connection // (create a new database if it doesn't exist yet): EntityManagerFactory emf

a context listener class that will manage a JPA's EntityManagerFactory representing the ObjectDB database.

listener class that will manage a JPA's EntityManagerFactory representing the ObjectDB database.