The packages and annotatedĬlasses are declared in your regular XML configuration file (usually Dog public class HibernateUtil ĪnnotationConfiguration. (legacy) HibernateUtil approach: package hello import org. If you boot Hibernate yourself, make sure to use theĪnnotationConfiguration class instead of theĬonfiguration class. Hibernate Core and its native APIs read on. Hibernate EntityManager documentation for more information). We recommend you use the JPA 2 APIs to bootstrap Hibernate (see the Alternatively add the following dependency in your Hibernate-search.jar and its dependencies in yourĬlasspath.
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If you wish to use Hibernate Search, download it AlternativelyĪdd the following dependency in your pom.xml. We recommend you use Hibernate Validator and theīean Validation specification capabilities as its integration with Java Need it when you deploy your application in a Java EE 6 application With the spec and passed the TCK signature test.
With em.This is the JAR containing the JPA 2.0 API, it is fully compliant Prevent changes made to all Entites from going into the DB within a Transaction
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In this case 1 x INSERT and 1 x Update statements are being Transactional With em.detach(entity) the changes to this entity are no longer being tracked by the EntityManager Prevent changes made to an Entity from going into the DB within an Transaction In this case 1 x INSERT and 2 x UPDATE statements are being Transactional Send out changes to the DB within a Transaction In this case 1 x INSERT and 1 x UPDATE statement are being Transactional The EntityManager keeps track of all the changes that are being made to an Entity In a method every set-method results in an update of the row regardless of calling em.merge() on it Reset In-Memory DB after a test method that changes the state of the DirtiesContext createQuery( "select p from Person p", Person. Define multiple named queries on an NamedQuery( name= "find_all_persons", query= "select p from Person NamedQuery( name= "find_all_persons_with_a", query= "select p from Person p where name like 'a%'") NamedQuery( name= "find_all_persons", query= "select p from Person p") createNamedQuery( "find_all_persons", Person. Find all entities with EntityManager (using JPQL -> It uses entites in its query, not table names) Delete a JPA entity with EntityManager Insert or Update a JPA entity with EntityManager Show SQL statistics of JPA / Hibernate (e.g. Pretty print the SQL printed on the console Show SQL Statements made with JPA / Hibernate Public class PersonJpaRepository PersistenceContext Enable Transaction Management on each Transactional // Public class Team ManyToMany( cascade = ) ĮntityManger = Interface to the PersistenceContext Model a m:n relationship where the corresponding relationship record would be deleted when a entity record is Entity Delete dependent children, when the parent is going to be deleted (child-entites are orphans (=Waisen) OneToMany( mappedBy= "foo", orphanRemoval= true) Use a database sequence on id Table( name = "ADDRESS") Vorteile: - Es werden automatisch Änderungen getrackt.īeim nächsten Transaktions-Commit werden nur die Änderungen in die DB geschrieben.ĭetached - Lazy Loading muss nicht zwangsweise funktionieren
Managed - Es gibt einen Entity-Manager, der für dieses Objekt verantwortlich ist: Managed -> query.getSingleResult -> ManagedĮin neu angelegtes Entity Object ist im Zustand "New". Managed -> query.getResultList -> Managed ByteCode Enhancement (default in EclipseLink): Add special logic to the get methods inside the Java Bytecode Proxying the object (default in Hibernate) by creating a Subclass of that object at runtime and overwrite the get methods.Ģ. Two types of Lazy Loading implementationsġ. Lists + Sets fetch type is LAZY by default SomeEntity entity = entityManager.find(SomeEntity.class, fetch type is EAGER by default Transaction Management with an Entity-Mananger:
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