[Hibernate-JIRA] Created: (HHH-2738) Eager fetch support for StatelessSession
by Christian Bauer (JIRA)
Eager fetch support for StatelessSession
----------------------------------------
Key: HHH-2738
URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-2738
Project: Hibernate3
Issue Type: Task
Components: core
Reporter: Christian Bauer
class Node {
@ManyToOne(fetch = FetchType.EAGER)
@JoinColumn(name = "PARENT_NODE_ID", nullable = true)
protected Node parent;
}
StatelessSession ss = getStatelessSession();
Node node = (Node) ss.get(Node.class, nodeId);
[testng] org.hibernate.AssertionFailure: possible non-threadsafe access to the session
[testng] at org.hibernate.engine.TwoPhaseLoad.initializeEntity(TwoPhaseLoad.java:100)
[testng] at org.hibernate.loader.Loader.initializeEntitiesAndCollections(Loader.java:854)
[testng] at org.hibernate.loader.Loader.doQuery(Loader.java:729)
[testng] at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:236)
[testng] at org.hibernate.loader.Loader.loadEntity(Loader.java:1860)
[testng] at org.hibernate.loader.entity.AbstractEntityLoader.load(AbstractEntityLoader.java:48)
[testng] at org.hibernate.loader.entity.AbstractEntityLoader.load(AbstractEntityLoader.java:42)
[testng] at org.hibernate.persister.entity.AbstractEntityPersister.load(AbstractEntityPersister.java:3042)
[testng] at org.hibernate.impl.StatelessSessionImpl.get(StatelessSessionImpl.java:158)
[testng] at org.hibernate.impl.StatelessSessionImpl.get(StatelessSessionImpl.java:153)
[testng] at org.hibernate.impl.StatelessSessionImpl.get(StatelessSessionImpl.java:145)
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12 years, 11 months
[Hibernate-JIRA] Created: (HHH-5348) java.lang.IllegalArgumentException: Cannot create TypedQuery for query with more than one return with AbstractEntityManager.createQuery(String jpaqlString, Class<T> resultClass) on View object
by nodje (JIRA)
java.lang.IllegalArgumentException: Cannot create TypedQuery for query with more than one return with AbstractEntityManager.createQuery(String jpaqlString, Class<T> resultClass) on View object
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Key: HHH-5348
URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-5348
Project: Hibernate Core
Issue Type: Bug
Components: entity-manager
Affects Versions: 3.5.3
Reporter: nodje
I'm getting a
java.lang.IllegalArgumentException: Cannot create TypedQuery for query with more than one return
with a query that returns a View object.
AbstractEntityManager:279, detects as many returns type as there is parameters in the View object, instead of one single result type, the View Object itself.
QueryString example that fails with public <T> TypedQuery<T> createQuery(String jpaqlString, Class<T> resultClass):
"select new WorkContractDto(wc.workContractStartDate, wc.workContractEndDate, wc.workContractEmployeeLastName, wc.workContractSendingStatus) from WorkContract wc where wc.workContractEmployeeLastName = ?1"
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12 years, 11 months
[Hibernate-JIRA] Created: (HHH-5368) Not throwing Optimistic Lock when the entity is attached
by Fernando Rubbo (JIRA)
Not throwing Optimistic Lock when the entity is attached
--------------------------------------------------------
Key: HHH-5368
URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-5368
Project: Hibernate Core
Issue Type: Bug
Components: core
Affects Versions: 3.2.4.sp1
Environment: windows XP, jboss 4.3 EAP, hibernate 3.4.2.sp1
Reporter: Fernando Rubbo
Priority: Minor
Hi
Hibernate is not throwing Optimistic Lock when the entity is attached. It happens when the business rule sets a version in the attached entity that is less than its original (from database) version value.
Take the following code as an example of the bug.
// inserts A
A a1 = new A();
a1.setName("A1");
dao.persist(a1);
dao.flush();
dao.clear();
// as expected, the piece of code below works just fine
final A a2 = dao.find(A.class, new BigDecimal(1));
a2.setName("A2");
dao.merge(a2);
dao.flush();
dao.clear();
// as expected, this code fails due to Optimistic Lock
try{
final A a3 = dao.find(A.class, new BigDecimal(1));
dao.clear();
a3.setName("A3");
a3.setVersion(0); //database verison is 1
dao.merge(a3);
dao.flush();
Assert.fail();
}catch (Exception e) {
System.out.println(e.getMessage());
// ignore
}finally{
dao.clear();
}
// unexpectedly, the piece of code below also works..
// even with the version being less than the one in the database
// Note that this happens because hibernate is holding internaly the original version of the entity.
// Even when the version is manually changed it keeps using the original one.
final A a3 = dao.find(A.class, new BigDecimal(1));
a3.setName("A3");
a3.setVersion(0); //database verison is 1
dao.merge(a3);
dao.flush();
dao.clear();
This problem can be handled by the business rule. For example, whether the version that comes from the screen is smaller than the one from the database it could throw an Optimistic Lock exception. However, it it was not handled, hibernate must take care of this in the same way it does with detached objects.
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12 years, 11 months
[Hibernate-JIRA] Created: (HHH-3967) Great performance improvement for CascadingAction.PERSIST_ON_FLUSH action !!
by Guenther Demetz (JIRA)
Great performance improvement for CascadingAction.PERSIST_ON_FLUSH action !!
----------------------------------------------------------------------------
Key: HHH-3967
URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-3967
Project: Hibernate Core
Issue Type: Improvement
Components: core
Affects Versions: 3.3.1
Environment: 3.3.1 GA , SQLServer
Reporter: Guenther Demetz
Sometimes large stateful transactions are unavoidable and especially when having several large persistent collections in dirty state,
flushing becomes gradually more cpu intensive and slowly.
Analizing several stacktraces I detected that the thread most time is executing at the same point in reflection ,
see here a typical stacktrace:
java.lang.Class.isAssignableFrom(Native Method)
sun.reflect.UnsafeFieldAccessorImpl.ensureObj(UnsafeFieldAccessorImpl.java:36)
...
java.lang.reflect.Field.get(Field.java:358)
DirectPropertyAccessor$DirectGetter.get(DirectPropertyAccessor.java:55)
PojoEntityTuplizer(AbstractEntityTuplizer).getPropertyValue(Object, int) line: 300
SingleTableEntityPersister(AbstractEntityPersister).getPropertyValue(Object, int, EntityMode) line: 3609
Cascade.cascade(EntityPersister, Object, Object) line: 172
...
Making further investigations, I saw that:
- CascadingAction.PERSIST_ON_FLUSH requires NoCascadeChecking
- for all kind of properties the noCascade implementation is called
- regarding noCascade implementation checks only properties of type Entity !
public static final CascadingAction PERSIST_ON_FLUSH = new CascadingAction() {
...
public void noCascade(EventSource session, Object child, Object parent, EntityPersister persister, int propertyIndex) {
...
Type type = persister.getPropertyTypes()[propertyIndex];
if ( type.isEntityType() ) {
... check and throw eventually a TransientObjectException
}
}
Thus most property values are retrieved by reflection in vain as they are not of type entity.
With following code addition in org.hibernate.engine.Cascade.java
I was able do avoid most reflection method calls without affecting the behaviour:
org.hibernate.engine.Cascade.java
...
public void cascade(final EntityPersister persister, final Object parent, final Object anything) throws HibernateException {
...
else if ( action.requiresNoCascadeChecking() ) {
// Line:162
// begin Improvement
if (action == CascadingAction.PERSIST_ON_FLUSH) {
Type type = persister.getPropertyTypes()[i];
if ( !type.isEntityType() ) {
// Remark: goes only well as long PERSIST_ON_FLUSH noCascade implementation checks only entities
continue;
}
}
// end Improvement
action.noCascade(
eventSource,
persister.getPropertyValue( parent, i, entityMode ),
parent,
persister,
i
);
...
best regards
Guenther D.
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12 years, 11 months
[Hibernate-JIRA] Created: (HHH-6039) jpaEntityName not set when using Hibernate mapping
by JOUFFRE Nelly (JIRA)
jpaEntityName not set when using Hibernate mapping
--------------------------------------------------
Key: HHH-6039
URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-6039
Project: Hibernate Core
Issue Type: Bug
Components: metamodel, query-criteria
Affects Versions: 3.6.2
Environment: hibernate-(core, entitymanager...)-3.6.2.Final
hibernate-jpa-2.0-api-1.0.0.Final
MySQL 5.1
Spring 3.0.5.RELEASE
Reporter: JOUFFRE Nelly
Attachments: Qualifier.hbm.xml
I'm trying to run the following query
CriteriaBuilder cb = entityManager.getCriteriaBuilder();
CriteriaQuery<Qualifier> cq = cb.createQuery(Qualifier.class);
Root<Qualifier> qualifRoot = cq.from(Qualifier.class);
List<Qualifier> results = entityManager.createQuery(cq).getResultList();
The Qualifier class is mapped using Hibernate hbm.xml mapping (see attachement)
The entityManagerFactory is configured using a Spring class
<bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
...
</bean>
This Criteria query throws the exception: org.hibernate.hql.ast.QuerySyntaxException: unexpected token: null near line 1, column 29 [select generatedAlias0 from null as generatedAlias0]
The FROM clause, which here is null, is built using the EntityType.jpaEntityName property which value comes from PersistentClass.jpaEntityName property. But this property is never set when context is loaded to build the Metamodel.
Is this property not set because the mapping is an hibernate mapping and not a JPA one ? or is it a bug ?
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12 years, 11 months