About EntityManagerFactory

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javax.persistence.EntityManagerFactory

javax.persistence Interface EntityManagerFactory Interface used to interact with the entity manager ... . Once an EntityManagerFactory has been closed, all its entity managers are considered to be in the closed state. Since: JPA 1.0 Learn how to use EntityManagerFactory in Chapter 3 of the ObjectDB/JPA manual
JPA Doc
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close()

Method javax.persistence.EntityManagerFactory void close() Close the factory, releasing any resources that it holds. After a factory instance has been closed, all methods invoked on it will throw the IllegalStateException, except for isOpen, which will return false. Once an EntityManagerFactory
JPA Doc
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createEntityManager()

Method javax.persistence.EntityManagerFactory EntityManager createEntityManager() Create a new application-managed EntityManager. This method returns a new EntityManager instance each time it is invoked. The isOpen method will return true on the returned instance. Returns: entity manager instance
JPA Doc
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createEntityManager(map)

Method javax.persistence.EntityManagerFactory EntityManager createEntityManager(   Map map ) Create a new application-managed EntityManager with the specified Map of properties. This method returns a new EntityManager instance each time it is invoked. The isOpen method will return true
JPA Doc
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getCache()

Method javax.persistence.EntityManagerFactory Cache getCache() Access the cache that is associated with the entity manager factory (the "second level cache"). Returns: instance of the Cache interface Throws: IllegalStateException - if the entity manager factory has been closed Since: JPA 2.0
JPA Doc
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getCriteriaBuilder()

Method javax.persistence.EntityManagerFactory CriteriaBuilder getCriteriaBuilder() Return an instance of CriteriaBuilder for the creation of CriteriaQuery objects. Returns: CriteriaBuilder instance Throws: IllegalStateException - if the entity manager factory has been closed Since: JPA 2.0
JPA Doc
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getMetamodel()

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

Method javax.persistence.EntityManagerFactory PersistenceUnitUtil getPersistenceUnitUtil() Return interface providing access to utility methods for the persistence unit. Returns: PersistenceUnitUtil interface Throws: IllegalStateException - if the entity manager factory has been closed Since: JPA 2.0
JPA Doc
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getProperties()

Method javax.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
JPA Doc
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isOpen()

Method javax.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: JPA 1.0