1:27 p.m.
Generated version are incremented by Hibernate
----------------------------------------------
Key: HHH-2796
URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-2796
Project: Hibernate3
Issue Type: Bug
Components: core
Affects Versions: 3.2.1
Environment: 3.2.1, Oracle 10g
Reporter: Heba Tawfik
Creating a new entity which it's version is set to generated="always" &
saving it, then in the same session adding an object to any of its on-to-many
relationships is throwing a StaleObjectStateException.
To regenerate the problem, consider the following code
1- departement.hbm.xml :
----------------------------------------
<hibernate-mapping package="com.myproject.domain">
<class name="Departement" table="Departement">
<id name="id">
<column name="dept_id" />
</id>
<version column="version" generated="always"
name="version" type="integer" unsaved-value="null" />
<property name="name" column="name" />
<bag name="employees" inverse="true" cascade="all"
lazy="true">
<key column="dept_id"></key>
<one-to-many class="Employee" />
</bag>
</class>
</hibernate-mapping>
2- employee.hbm.xml :
--------------------------------------
<hibernate-mapping package="com.myproject.domain">
<class name="Employee" table="Employee">
<id name="id">
<column name="employee_id" />
</id>
<property name="firstName" column="first_name" />
<property name="lastName" column="last_name" />
<property name="age" column="age" />
<property name="salary" column="salary" />
<many-to-one cascade="none"
class="com.myproject.domain.Departement"
column="dept_id" embed-xml="true" insert="false"
name="department" not-null="false"
unique="false" update="false" not-found="ignore">
</many-to-one>
</class>
</hibernate-mapping>
3- Departement.Java
---------------------------
package com.myproject.domain;
import java.util.ArrayList;
import java.util.List;
public class Departement extends BaseDepartement{
int id;
String name;
List employees;
Integer version;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Integer getVersion() {
return version;
}
public void setVersion(Integer version) {
this.version = version;
}
public List getEmployees() {
return employees;
}
public void setEmployees(List employees) {
this.employees = employees;
}
public void addToEmployeeList(Employee emp)
{
if(employees==null)
{
setEmployees(new ArrayList());
}
employees.add(emp);
}
}
4- Employee.Java :
---------------------------
package com.myproject.domain;
public class Employee {
int id;
String firstName;
String lastName;
int age;
int salary;
BaseDepartement department;
public BaseDepartement getDepartment() {
return department;
}
public void setDepartment(BaseDepartement department) {
this.department = department;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
public String getFirstName() {
return firstName;
}
public void setFirstName(String firstName) {
this.firstName = firstName;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getLastName() {
return lastName;
}
public void setLastName(String lastName) {
this.lastName = lastName;
}
public int getSalary() {
return salary;
}
public void setSalary(int salary) {
this.salary = salary;
}
}
4- Code To Test :
------------------------
public static void main(String args[]) throws Exception
{
SessionFactory factory = new
Configuration().configure("com/myproject/config/hibernate.cfg.xml").buildSessionFactory();
Session session = factory.openSession();
Transaction transaction = session.beginTransaction();
Departement aDept =new Departement();
aDept.setId(10);
aDept.setName("Test");
session.save(aDept);
transaction.commit();
transaction = session.beginTransaction();
Employee emp=new Employee();
emp.setId(10);
emp.setFirstName("test");
emp.setLastName("test");
emp.setSalary(10);
emp.setAge(10);
emp.setDepartment(aDept);
aDept.addToEmployeeList(emp);
session.saveOrUpdate(aDept);
transaction.commit();
session.close();
}
On the database, the default value for version cloumn is set to "1" and a
trigger is defined as follow on the Departement table:
create or replace
TRIGGER TRIGGER1
BEFORE UPDATE ON DEPARTEMENT
FOR EACH ROW
BEGIN
:new.version:= :old.version + 1;
END;
Upon executing the above code, the following is the hibernate logging :
automatically flushing session
/* insert com.eds.myproject.domain.Departement
*/ insert
into
Departement
(name, dept_id)
values
(?, ?)
binding 'Test' to parameter: 1
binding '10' to parameter: 2
/* get generated state com.eds.myproject.domain.Departement */ select
departemen_.version as version1_
from
Departement departemen_
where
departemen_.dept_id=?
binding '10' to parameter: 1
returning '1' as column: version1_
before transaction completion
after transaction completion
automatically flushing session
/* get current state com.eds.myproject.domain.Employee */ select
employee_.employee_id,
employee_.first_name as first2_0_,
employee_.last_name as last3_0_,
employee_.age as age0_,
employee_.salary as salary0_
from
Employee employee_
where
employee_.employee_id=?
binding '10' to parameter: 1
/* insert com.eds.myproject.domain.Employee
*/ insert
into
Employee
(first_name, last_name, age, salary, employee_id)
values
(?, ?, ?, ?, ?)
binding 'test' to parameter: 1
binding 'test' to parameter: 2
binding '10' to parameter: 3
binding '10' to parameter: 4
binding '10' to parameter: 5
/* update
com.eds.myproject.domain.Departement */ update
Departement
set
name=?
where
dept_id=?
and version=?
binding 'Test' to parameter: 1
binding '10' to parameter: 2
binding '2' to parameter: 3
Could not synchronize database state with session
org.hibernate.StaleObjectStateException: Row was updated or deleted by another transaction
(or unsaved-value mapping was incorrect): [com.eds.myproject.domain.Departement#10]
at
org.hibernate.persister.entity.AbstractEntityPersister.check(AbstractEntityPersister.java:1714)
at
org.hibernate.persister.entity.AbstractEntityPersister.update(AbstractEntityPersister.java:2357)
at
org.hibernate.persister.entity.AbstractEntityPersister.updateOrInsert(AbstractEntityPersister.java:2257)
at
org.hibernate.persister.entity.AbstractEntityPersister.update(AbstractEntityPersister.java:2557)
at org.hibernate.action.EntityUpdateAction.execute(EntityUpdateAction.java:92)
at org.hibernate.engine.ActionQueue.execute(ActionQueue.java:248)
at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:232)
at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:140)
at
org.hibernate.event.def.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:298)
at
org.hibernate.event.def.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:27)
at org.hibernate.impl.SessionImpl.flush(SessionImpl.java:1000)
at org.hibernate.impl.SessionImpl.managedFlush(SessionImpl.java:338)
at org.hibernate.transaction.JDBCTransaction.commit(JDBCTransaction.java:106)
at com.eds.myproject.test.Test.main(Test.java:43)
org.hibernate.StaleObjectStateException: Row was updated or deleted by another transaction
(or unsaved-value mapping was incorrect): [com.eds.myproject.domain.Departement#10]
at
org.hibernate.persister.entity.AbstractEntityPersister.check(AbstractEntityPersister.java:1714)
at
org.hibernate.persister.entity.AbstractEntityPersister.update(AbstractEntityPersister.java:2357)
at
org.hibernate.persister.entity.AbstractEntityPersister.updateOrInsert(AbstractEntityPersister.java:2257)
at
org.hibernate.persister.entity.AbstractEntityPersister.update(AbstractEntityPersister.java:2557)
at org.hibernate.action.EntityUpdateAction.execute(EntityUpdateAction.java:92)
at org.hibernate.engine.ActionQueue.execute(ActionQueue.java:248)
at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:232)
at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:140)
at
org.hibernate.event.def.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:298)
at
org.hibernate.event.def.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:27)
at org.hibernate.impl.SessionImpl.flush(SessionImpl.java:1000)
at org.hibernate.impl.SessionImpl.managedFlush(SessionImpl.java:338)
at org.hibernate.transaction.JDBCTransaction.commit(JDBCTransaction.java:106)
at com.eds.myproject.test.Test.main(Test.java:43)
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