Hibernate Versioning Example, Hibernate Versioning Of Objects

Hibernate » on Jun 13, 2011 { 51 Comments } By Sivateja

Once an object is saved in a database, we can modify that object any number of times right, If we want to know how many no of times that an object is modified then we need to apply this versioning concept.
When ever we use versioning then hibernate inserts version number as zero, when ever object is saved for the first time in the database. Later hibernate increments that version no by one automatically when ever a modification is done on that particular object.
In order to use this versioning concept, we need the following two changes in our application

Add one property of type int in our pojo class
In hibernate mapping file, add an element called version soon after id element

Files required to execute this program..

Product.java (My POJO class)
Product.hbm.xml (Xml mapping file )
hibernate.cfg.xml (Xml configuration file)
ClientForSave_1.java (java file to write our hibernate logic)
ClientForUpdate_2.java

Product.java

package str;

public class Product{

	private int productId;
	private String proName;
	private double price;

        private int v;

	public void setProductId(int productId)
	{
	    this.productId = productId;
	}
	public int getProductId()
	{
	    return productId;
	}

	public void setProName(String proName)
	{
	    this.proName = proName;
	}
	public String getProName()
	{
	    return proName;
	}

	public void setPrice(double price)
	{
	    this.price = price;
	}
	public double getPrice()
	{
	    return price;
	}

       public void setV(int v)
	{
	    this.v = v;
	}
	public int getV()
	{
	    return v;
	}
}

Product.hbm.xml

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">

<hibernate-mapping>
<class name="str.Product" table="products">

<id name="productId" column="pid"  />
<version name="v" column="ver" />
<property name="proName" column="pname" length="10"/>
<property name="price"/>

</class>
</hibernate-mapping>

Note:

In this above mapping file, find the <version> element, there i have given column name as version, actually you can write any name its not predefined.

hibernate.cfg.xml

<?xml version='1.0' encoding='UTF-8'?>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">

<hibernate-configuration>
<session-factory>
<property name="connection.driver_class">oracle.jdbc.driver.OracleDriver
</property>
<property name="connection.url">jdbc:oracle:thin:@www.java4s.com:1521:XE</property>
<property name="connection.username">system</property>
<property name="connection.password">admin</property>

<property name="dialect">org.hibernate.dialect.OracleDialect</property>
<property name="show_sql">true</property>
<property name="hbm2ddl.auto">update</property>

<mapping resource="Product.hbm.xml"></mapping>
</session-factory>
</hibernate-configuration>

ClientForSave_1.java

package str;

import org.hibernate.*;
import org.hibernate.cfg.*;

public class ClientForSave_1 { 

    public static void main(String[] args)
    {

        Configuration cfg = new Configuration();
        cfg.configure("hibernate.cfg.xml"); 

        SessionFactory factory = cfg.buildSessionFactory();
        Session session = factory.openSession();
        Product p=new Product(); 

        p.setProductId(104);
        p.setProName("AC");
        p.setPrice(14000);

        Transaction tx = session.beginTransaction();
        session.save(p);
        System.out.println("Object saved successfully.....!!");
        tx.commit();
        session.close();
        factory.close();
    }

}

Note:

Remember friends, first we must run the logic to save the object then hibernate will inset 0 (Zero) by default in the version column of the database, its very important point in the interview point of view also
First save logic to let the hibernate to insert zero in the version column, then any number of update logic’s (programs) we run, hibernate will increments +1 to the previous value
But if we run the update logic for the first time, hibernate will not insert zero..! it will try to increment the previous value which is NULL in the database so we will get the exception.

ClientForUpdate_2.java

package str;

import org.hibernate.*;
import org.hibernate.cfg.*;

public class ClientForUpdate_2 { 

	public static void main(String[] args)
	{

		Configuration cfg = new Configuration();
		cfg.configure("hibernate.cfg.xml"); 

		SessionFactory factory = cfg.buildSessionFactory();
		Session session = factory.openSession();
		Object o=session.load(Product.class,new Integer(104));
		Product s=(Product)o;

		Transaction tx = session.beginTransaction();	

		 s.setPrice(4000); // implicitly update method will be call

		tx.commit();

		System.out.println("Object Updated successfully.....!!");
		session.close();
		factory.close();
	}

}

First run the ClientForSave_1.java, then only ClientForUpdate_2.java
&

Eclipse Output

In the database

Note(Important..!!!)______
Guys your know some thing.., actually we can run any logic (Save or Update) 🙂 for the first time, but make sure the versioning column is a number (>=0), but save logic has ability to insert zero by default if there is no value, and update logic will directly tries to increments already existing value by 1, it wont insert any value by default if its null, hope you are clear about this point, and mates its the very important concept in the interview point of view, if you have any doubt just Ask a Question on this our team will respond ASAP

::. About the Author .::

Sivateja Kandula - Java/J2EE Full Stack Developer

Founder of Java4s - Get It Yourself, A popular Java/J2EE Programming Blog, Love Java and UI frameworks.
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Comments

51 Responses to “Hibernate Versioning Example, Hibernate Versioning Of Objects”

venugopal says:
March 23, 2012 at 5:54 AM
hI i am executing the above program as same as your saying.
but i got these exception.please help me.
SEVERE: Error parsing XML: hibernate.cfg.xml(7) Element type “session-factory” must be followed by either attribute specifications, “>” or “/>”.
Exception in thread “main” org.hibernate.HibernateException: Could not parse configuration: hibernate.cfg.xml
at org.hibernate.cfg.Configuration.doConfigure(Configuration.java:1494)
at org.hibernate.cfg.Configuration.configure(Configuration.java:1428)
at org.hibernate.pojo.ClientForSave_1.main(ClientForSave_1.java:15)
Caused by: org.dom4j.DocumentException: Error on line 7 of document : Element type “session-factory” must be followed by either attribute specifications, “>” or “/>”. Nested exception: Element type “session-factory” must be followed by either attribute specifications, “>” or “/>”.
at org.dom4j.io.SAXReader.read(SAXReader.java:482)
at org.hibernate.cfg.Configuration.doConfigure(Configuration.java:1484)
… 2 more
Reply
Java4s says:
March 26, 2012 at 1:17 AM
@venugopal
Seems its the syntax issue, please download the program by clicking download button and try from your end, unlike copy the source from the text [ As some times we may copy other characters ]
Its working fine from my end.
Reply
susil sahoo says:
June 17, 2012 at 2:51 AM
Hi,
Am read about version concept in hibernate. But can u please explain “why this concept comes into picture?”. Is it helpful for threading concept in hibernate ?
Thanks in Advance.
Reply
Java4s says:
June 20, 2012 at 2:24 AM
@susil sachoo
With hibernate versioning we will be able to know, how many times a particular object is modified ( how many time a row got updated ) in the database.
There is no way relation with threading concept I guess.
Reply
Vivek says:
August 29, 2012 at 12:16 AM
Hi Java4s,
Please tell me how to insert date and time when ever the data gets updates in the database instead of how many number of times updated.
Thanks
Reply
Java4s says:
August 29, 2012 at 1:21 PM
@Vivek
Add Date and Time just like normal variables, but it will need one more column in the database.
Reply
Lavakumar says:
November 5, 2012 at 9:54 AM
Hi,
The PRODUCTS table has PID, PNAME, PRICE and VER columns. what should be the data type of “VER” column.
Reply
Java4s says:
November 9, 2012 at 3:08 PM
@Lavakumar
I will tell you how to find the datatype of that column, open SQL prompt and just type ‘desc PRODUCTS‘ and press enter.
Hope you are seeing it now 😉 are you ?
Reply
pallavi says:
November 27, 2012 at 3:18 PM
in update logic if the default version value in database is NULL then what happens, if we get an exception can you tell me what exception will it raise?
Reply
- Manisha says:
  May 9, 2017 at 8:22 AM
  if you use update first then you will face these Exception
  May 09, 2017 1:47:57 PM org.hibernate.cfg.Environment <clinit>
  INFO: Hibernate 3.1.3
  May 09, 2017 1:47:57 PM org.hibernate.cfg.Environment <clinit>
  INFO: hibernate.properties not found
  May 09, 2017 1:47:57 PM org.hibernate.cfg.Environment <clinit>
  INFO: using CGLIB reflection optimizer
  May 09, 2017 1:47:57 PM org.hibernate.cfg.Environment <clinit>
  INFO: using JDK 1.4 java.sql.Timestamp handling
  May 09, 2017 1:47:57 PM org.hibernate.cfg.Configuration configure
  INFO: configuring from resource: com/configuration/hibernate.cfg.xml
  May 09, 2017 1:47:57 PM org.hibernate.cfg.Configuration getConfigurationInputStream
  INFO: Configuration resource: com/configuration/hibernate.cfg.xml
  May 09, 2017 1:47:58 PM org.hibernate.cfg.Configuration addResource
  INFO: Reading mappings from resource: com/mapping/Employee.hbm.xml
  May 09, 2017 1:47:58 PM org.hibernate.cfg.HbmBinder bindRootPersistentClassCommonValues
  INFO: Mapping class: com.Bean.EUser -> Emp_10
  May 09, 2017 1:47:58 PM org.hibernate.cfg.Configuration doConfigure
  INFO: Configured SessionFactory: null
  May 09, 2017 1:47:58 PM org.hibernate.connection.DriverManagerConnectionProvider configure
  INFO: Using Hibernate built-in connection pool (not for production use!)
  May 09, 2017 1:47:58 PM org.hibernate.connection.DriverManagerConnectionProvider configure
  INFO: Hibernate connection pool size: 5
  May 09, 2017 1:47:58 PM org.hibernate.connection.DriverManagerConnectionProvider configure
  INFO: autocommit mode: false
  May 09, 2017 1:47:58 PM org.hibernate.connection.DriverManagerConnectionProvider configure
  INFO: using driver: org.postgresql.Driver at URL: jdbc:postgresql://localhost:5432/Practice
  May 09, 2017 1:47:58 PM org.hibernate.connection.DriverManagerConnectionProvider configure
  INFO: connection properties: {user=postgres, password=****}
  May 09, 2017 1:47:59 PM org.hibernate.cfg.SettingsFactory buildSettings
  INFO: RDBMS: PostgreSQL, version: 9.3.5
  May 09, 2017 1:47:59 PM org.hibernate.cfg.SettingsFactory buildSettings
  INFO: JDBC driver: PostgreSQL Native Driver, version: PostgreSQL 8.3 JDBC4 with SSL (build 603)
  May 09, 2017 1:47:59 PM org.hibernate.dialect.Dialect <init>
  INFO: Using dialect: org.hibernate.dialect.PostgreSQLDialect
  May 09, 2017 1:47:59 PM org.hibernate.transaction.TransactionFactoryFactory buildTransactionFactory
  INFO: Using default transaction strategy (direct JDBC transactions)
  May 09, 2017 1:47:59 PM org.hibernate.transaction.TransactionManagerLookupFactory getTransactionManagerLookup
  INFO: No TransactionManagerLookup configured (in JTA environment, use of read-write or transactional second-level cache is not recommended)
  May 09, 2017 1:47:59 PM org.hibernate.cfg.SettingsFactory buildSettings
  INFO: Automatic flush during beforeCompletion(): disabled
  May 09, 2017 1:47:59 PM org.hibernate.cfg.SettingsFactory buildSettings
  INFO: Automatic session close at end of transaction: disabled
  May 09, 2017 1:47:59 PM org.hibernate.cfg.SettingsFactory buildSettings
  INFO: JDBC batch size: 15
  May 09, 2017 1:47:59 PM org.hibernate.cfg.SettingsFactory buildSettings
  INFO: JDBC batch updates for versioned data: disabled
  May 09, 2017 1:47:59 PM org.hibernate.cfg.SettingsFactory buildSettings
  INFO: Scrollable result sets: enabled
  May 09, 2017 1:47:59 PM org.hibernate.cfg.SettingsFactory buildSettings
  INFO: JDBC3 getGeneratedKeys(): disabled
  May 09, 2017 1:47:59 PM org.hibernate.cfg.SettingsFactory buildSettings
  INFO: Connection release mode: auto
  May 09, 2017 1:47:59 PM org.hibernate.cfg.SettingsFactory buildSettings
  INFO: Default batch fetch size: 1
  May 09, 2017 1:47:59 PM org.hibernate.cfg.SettingsFactory buildSettings
  INFO: Generate SQL with comments: disabled
  May 09, 2017 1:47:59 PM org.hibernate.cfg.SettingsFactory buildSettings
  INFO: Order SQL updates by primary key: disabled
  May 09, 2017 1:47:59 PM org.hibernate.cfg.SettingsFactory createQueryTranslatorFactory
  INFO: Query translator: org.hibernate.hql.ast.ASTQueryTranslatorFactory
  May 09, 2017 1:47:59 PM org.hibernate.hql.ast.ASTQueryTranslatorFactory <init>
  INFO: Using ASTQueryTranslatorFactory
  May 09, 2017 1:47:59 PM org.hibernate.cfg.SettingsFactory buildSettings
  INFO: Query language substitutions: {}
  May 09, 2017 1:47:59 PM org.hibernate.cfg.SettingsFactory buildSettings
  INFO: Second-level cache: enabled
  May 09, 2017 1:47:59 PM org.hibernate.cfg.SettingsFactory buildSettings
  INFO: Query cache: disabled
  May 09, 2017 1:47:59 PM org.hibernate.cfg.SettingsFactory createCacheProvider
  INFO: Cache provider: org.hibernate.cache.EhCacheProvider
  May 09, 2017 1:47:59 PM org.hibernate.cfg.SettingsFactory buildSettings
  INFO: Optimize cache for minimal puts: disabled
  May 09, 2017 1:47:59 PM org.hibernate.cfg.SettingsFactory buildSettings
  INFO: Structured second-level cache entries: disabled
  May 09, 2017 1:47:59 PM org.hibernate.cfg.SettingsFactory buildSettings
  INFO: Echoing all SQL to stdout
  May 09, 2017 1:47:59 PM org.hibernate.cfg.SettingsFactory buildSettings
  INFO: Statistics: disabled
  May 09, 2017 1:47:59 PM org.hibernate.cfg.SettingsFactory buildSettings
  INFO: Deleted entity synthetic identifier rollback: disabled
  May 09, 2017 1:47:59 PM org.hibernate.cfg.SettingsFactory buildSettings
  INFO: Default entity-mode: pojo
  May 09, 2017 1:47:59 PM org.hibernate.impl.SessionFactoryImpl <init>
  INFO: building session factory
  May 09, 2017 1:47:59 PM net.sf.ehcache.config.Configurator configure
  WARNING: No configuration found. Configuring ehcache from ehcache-failsafe.xml found in the classpath: jar:file:/E:/java%20software/eclipse%20Airsolwin/hibernat%20Basic/lib/ehcache-1.1.jar!/ehcache-failsafe.xml
  May 09, 2017 1:47:59 PM org.hibernate.impl.SessionFactoryObjectFactory addInstance
  INFO: Not binding factory to JNDI, no JNDI name configured
  May 09, 2017 1:47:59 PM org.hibernate.tool.hbm2ddl.SchemaUpdate execute
  INFO: Running hbm2ddl schema update
  May 09, 2017 1:47:59 PM org.hibernate.tool.hbm2ddl.SchemaUpdate execute
  INFO: fetching database metadata
  May 09, 2017 1:47:59 PM org.hibernate.tool.hbm2ddl.SchemaUpdate execute
  INFO: updating schema
  May 09, 2017 1:48:00 PM org.hibernate.tool.hbm2ddl.TableMetadata <init>
  INFO: table found: public.emp_10
  May 09, 2017 1:48:00 PM org.hibernate.tool.hbm2ddl.TableMetadata <init>
  INFO: columns: [password, address, user_id, name, version_id, email]
  May 09, 2017 1:48:00 PM org.hibernate.tool.hbm2ddl.TableMetadata <init>
  INFO: foreign keys: []
  May 09, 2017 1:48:00 PM org.hibernate.tool.hbm2ddl.TableMetadata <init>
  INFO: indexes: [emp_10_pkey]
  May 09, 2017 1:48:00 PM org.hibernate.tool.hbm2ddl.SchemaUpdate execute
  INFO: schema update complete
  Hibernate: select euser0_.user_id as user1_0_0_, euser0_.version_id as version2_0_0_, euser0_.name as name0_0_, euser0_.password as password0_0_, euser0_.email as email0_0_, euser0_.address as address0_0_ from Emp_10 euser0_ where euser0_.user_id=?
  May 09, 2017 1:48:00 PM org.hibernate.event.def.DefaultLoadEventListener onLoad
  INFO: Error performing load command
  org.hibernate.PropertyAccessException: exception setting property value with CGLIB (set hibernate.cglib.use_reflection_optimizer=false for more info) setter of com.Bean.EUser.setVersion
  at org.hibernate.tuple.PojoEntityTuplizer.setPropertyValuesWithOptimizer(PojoEntityTuplizer.java:215)
  at org.hibernate.tuple.PojoEntityTuplizer.setPropertyValues(PojoEntityTuplizer.java:185)
  at org.hibernate.persister.entity.AbstractEntityPersister.setPropertyValues(AbstractEntityPersister.java:3232)
  at org.hibernate.engine.TwoPhaseLoad.initializeEntity(TwoPhaseLoad.java:129)
  at org.hibernate.loader.Loader.initializeEntitiesAndCollections(Loader.java:842)
  at org.hibernate.loader.Loader.doQuery(Loader.java:717)
  at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:224)
  at org.hibernate.loader.Loader.loadEntity(Loader.java:1785)
  at org.hibernate.loader.entity.AbstractEntityLoader.load(AbstractEntityLoader.java:47)
  at org.hibernate.loader.entity.AbstractEntityLoader.load(AbstractEntityLoader.java:41)
  at org.hibernate.persister.entity.AbstractEntityPersister.load(AbstractEntityPersister.java:2730)
  at org.hibernate.event.def.DefaultLoadEventListener.loadFromDatasource(DefaultLoadEventListener.java:365)
  at org.hibernate.event.def.DefaultLoadEventListener.doLoad(DefaultLoadEventListener.java:346)
  at org.hibernate.event.def.DefaultLoadEventListener.load(DefaultLoadEventListener.java:123)
  at org.hibernate.event.def.DefaultLoadEventListener.onLoad(DefaultLoadEventListener.java:82)
  at org.hibernate.impl.SessionImpl.fireLoad(SessionImpl.java:862)
  at org.hibernate.impl.SessionImpl.immediateLoad(SessionImpl.java:820)
  at org.hibernate.proxy.AbstractLazyInitializer.initialize(AbstractLazyInitializer.java:62)
  at org.hibernate.proxy.AbstractLazyInitializer.getImplementation(AbstractLazyInitializer.java:98)
  at org.hibernate.proxy.CGLIBLazyInitializer.intercept(CGLIBLazyInitializer.java:158)
  at com.Bean.EUser$$EnhancerByCGLIB$$14e43df.setName(<generated>)
  at com.client.ClientUpdate.main(ClientUpdate.java:20)
  Caused by: net.sf.cglib.beans.BulkBeanException
  at com.Bean.EUser$$BulkBeanByCGLIB$$d863c8e9.setPropertyValues(<generated>)
  at org.hibernate.tuple.PojoEntityTuplizer.setPropertyValuesWithOptimizer(PojoEntityTuplizer.java:212)
  … 21 more
  Caused by: java.lang.NullPointerException
  … 23 more
  Exception in thread "main" org.hibernate.PropertyAccessException: exception setting property value with CGLIB (set hibernate.cglib.use_reflection_optimizer=false for more info) setter of com.Bean.EUser.setVersion
  at org.hibernate.tuple.PojoEntityTuplizer.setPropertyValuesWithOptimizer(PojoEntityTuplizer.java:215)
  at org.hibernate.tuple.PojoEntityTuplizer.setPropertyValues(PojoEntityTuplizer.java:185)
  at org.hibernate.persister.entity.AbstractEntityPersister.setPropertyValues(AbstractEntityPersister.java:3232)
  at org.hibernate.engine.TwoPhaseLoad.initializeEntity(TwoPhaseLoad.java:129)
  at org.hibernate.loader.Loader.initializeEntitiesAndCollections(Loader.java:842)
  at org.hibernate.loader.Loader.doQuery(Loader.java:717)
  at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:224)
  at org.hibernate.loader.Loader.loadEntity(Loader.java:1785)
  at org.hibernate.loader.entity.AbstractEntityLoader.load(AbstractEntityLoader.java:47)
  at org.hibernate.loader.entity.AbstractEntityLoader.load(AbstractEntityLoader.java:41)
  at org.hibernate.persister.entity.AbstractEntityPersister.load(AbstractEntityPersister.java:2730)
  at org.hibernate.event.def.DefaultLoadEventListener.loadFromDatasource(DefaultLoadEventListener.java:365)
  at org.hibernate.event.def.DefaultLoadEventListener.doLoad(DefaultLoadEventListener.java:346)
  at org.hibernate.event.def.DefaultLoadEventListener.load(DefaultLoadEventListener.java:123)
  at org.hibernate.event.def.DefaultLoadEventListener.onLoad(DefaultLoadEventListener.java:82)
  at org.hibernate.impl.SessionImpl.fireLoad(SessionImpl.java:862)
  at org.hibernate.impl.SessionImpl.immediateLoad(SessionImpl.java:820)
  at org.hibernate.proxy.AbstractLazyInitializer.initialize(AbstractLazyInitializer.java:62)
  at org.hibernate.proxy.AbstractLazyInitializer.getImplementation(AbstractLazyInitializer.java:98)
  at org.hibernate.proxy.CGLIBLazyInitializer.intercept(CGLIBLazyInitializer.java:158)
  at com.Bean.EUser$$EnhancerByCGLIB$$14e43df.setName(<generated>)
  at com.client.ClientUpdate.main(ClientUpdate.java:20)
  Caused by: net.sf.cglib.beans.BulkBeanException
  at com.Bean.EUser$$BulkBeanByCGLIB$$d863c8e9.setPropertyValues(<generated>)
  at org.hibernate.tuple.PojoEntityTuplizer.setPropertyValuesWithOptimizer(PojoEntityTuplizer.java:212)
  … 21 more
  Caused by: java.lang.NullPointerException
  … 23 more
  Reply
Arun says:
December 29, 2012 at 12:00 PM
Can we Use Directly saveOrUpdate(), for initially run the Program.?? When i tried saveOrUpdate() with first Run, “0” is inserted directly and in second Run it was incremented by one. what is the actual use of ( save(), update(),saveOrUpdate())
Reply
Sasikumar says:
January 1, 2013 at 3:48 PM
java.lang.NullPointerException
at org.hibernate.type.IntegerType.next(IntegerType.java:82)
at org.hibernate.engine.Versioning.increment(Versioning.java:131)
what are the Possibilities of this exception?
Reply
Vineet Kumar says:
January 7, 2013 at 9:08 AM
Can i make default zero value for version, so that what ever the operation is called like save or update, it will not raise the exception.
Reply
Hardeep Kaur says:
January 31, 2013 at 6:50 AM
Hi,
Please help me with a similiar kind of explaination for LAZY loading in hibernate.looking for some urgent help.
Reply
Kalpana says:
April 2, 2013 at 1:45 AM
I have on doubt ..what will happen if we invoke the method saveOrUpdate()
at first time..
whether the version column has 0 value or an exception after the saveOrUpdate() method invocation.
Kindly clarify my Doubt.
Thanks.
Reply
KiranV says:
May 30, 2013 at 2:02 PM
This concept is also called Optimistic locking in Hibernate.
If possible, can you please write a post explaining Pesimistic locking concept also?
Reply
MMS says:
December 18, 2013 at 7:37 AM
Hi,
There is a spelling mistake {insert] sorry to correct….i hope it is insert but here it is inset
Note:
Remember friends, first we must run the logic to save the object then hibernate will inset 0 (Zero)
Reply
Visitor says:
December 25, 2013 at 5:38 PM
Your articles are very simple to understand and you gives the process/execution steps that is very useful to understand the flow.
I appreciate your team’s work!.
Reply
Sumathi says:
March 5, 2014 at 9:42 AM
Can set default value for version column in the .hbm.xml file?
Reply
anu says:
March 14, 2014 at 12:41 PM
suppose i had given a value and saved then what is result of version column and if same value is changed by oher user then wht’s the vesion col value?
Reply
Saroj Kumar says:
March 25, 2014 at 12:49 PM
Presentation of concept is so lucid, eye-catching and cool, that i would love to learn all the concepts as soon as possible.
Reply
Ramesh M says:
April 5, 2014 at 8:21 PM
This version concept is required when multiple users using our application.Lets say two threads read the data.First thread update the data and then second thread update the data.We lost the changes done by first thread. see this link http://stackoverflow.com/questions/7631280/hibernate-automatic-versioning Ramesh
Reply
Prem says:
August 12, 2014 at 12:06 PM
Simple way of explaining concepts.
Like this tutorial site than others.
Thanks java4s.com
Reply
Girish N says:
September 18, 2014 at 9:02 AM
Can you explain one real use-case where we are going to use Hibernate Versioning concept
Reply
Dushyant says:
November 18, 2014 at 12:32 PM
hi plz clear suppose i was changed in object state than version will come to ‘0’ in database, after that anyother user will come & change the object state again now version auto increment & assing as ‘1’ in database. now i want our record from the database which i was modified with virson id ‘0’ thn how come its possible.
Reply
Farhan says:
February 2, 2015 at 7:59 AM
I failed to get to your point when you said,
“But if we run the update logic for the first time, hibernate will not insert zero..! it will try to increment the previous value which is NULL in the database so we will get the exception.”
How can you update any object which has not been persisted yet?
Hibernate assumes that the id field starts out null on new objects and is assigned when they are first saved. So, howcome NULL gets saved in the database.
Could you elaborate?
Reply
lokesh says:
April 5, 2015 at 11:17 AM
Hi Sivateja Kandula
How can we add new column to the existing table using hibernate?
Reply
anil says:
April 26, 2015 at 10:48 AM
Hi,
I am getting issue in my app. when i am trying two update second time it is throwing exception instead increment by +1.
Can you pls help me out.
Reply
venu says:
May 21, 2015 at 6:43 AM
I have a doubt in first level cache concept.
If you load any object, for second time onwards it will check in first level cache when call load(). suppose some one did deletion on the same object from database side. Is it load() method works fine or any exdception occurs what to do ?
Reply
Tirupathaiah says:
July 23, 2015 at 9:49 AM
Hi Java4s,
What is exact use of versioning in hibernate ?
What is the use of knowing no. of times of object updation ?
Reply
Manas says:
September 10, 2015 at 9:44 AM
Hi,
Please see the following steps and tell me where I am wrong,
1. Search any content
2. Edit Entity
3. Save Entity (and re-fetch for maintaining integrity)
4. Same session again edit entity and save
5. Gives hibernate version mismatch
Please help me out
Reply
S Amarnath Reedy says:
March 10, 2016 at 5:55 PM
Thanks for providing this web site.Main point in version is if any changes are done in existing data then only the version values is going to be change.
If you execute with out modifying it version number won’t change.try it
Reply
pradeep says:
March 18, 2016 at 5:17 AM
if we dont save any table row and we modify it then any change is there
Reply
Guru says:
March 23, 2016 at 5:02 PM
Thanks for providing this web site. i tried this versioning in my example but getting below exception . please clarify this.
LF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.
org.hibernate.MappingException: Unknown entity: versioning.Employee
Reply
Santosh says:
March 30, 2016 at 5:49 PM
So while creating table in DB (through script) initialized version column to its default (for int 0). Now executing update. So now column is not null this is zero(it default value). Instead of using save() first, executing update() first with all other data for column. what will be the result ?
Reply
Heeresh says:
April 27, 2016 at 7:08 AM
means we have to create version field in table
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Manohar says:
May 12, 2016 at 9:25 AM
Hi java4s,
In my application am using version feature.I am getting some errors
1)when i am trying to update the record for the first time it got updated and in version column saved with 1.
2)But second time am updating the same record by using without loading data from db i am getting below error.
can u explain why am getting error?
Exception in thread “main” org.hibernate.StaleObjectStateException: Row was updated or deleted by another transaction (or unsaved-value mapping was incorrect): [com.osi.pojo.Employee#1]
at org.hibernate.persister.entity.AbstractEntityPersister.check(AbstractEntityPersister.java:1950)
at org.hibernate.persister.entity.AbstractEntityPersister.update(AbstractEntityPersister.java:2595)
at org.hibernate.persister.entity.AbstractEntityPersister.updateOrInsert(AbstractEntityPersister.java:2495)
at org.hibernate.persister.entity.AbstractEntityPersister.update(AbstractEntityPersister.java:2822)
at org.hibernate.action.EntityUpdateAction.execute(EntityUpdateAction.java:113)
at org.hibernate.engine.ActionQueue.execute(ActionQueue.java:273)
at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:265)
at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:185)
at org.hibernate.event.def.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:321)
at org.hibernate.event.def.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:51)
at org.hibernate.impl.SessionImpl.flush(SessionImpl.java:1216)
at org.hibernate.impl.SessionImpl.managedFlush(SessionImpl.java:383)
at org.hibernate.transaction.JDBCTransaction.commit(JDBCTransaction.java:133)
at com.osi.test.Test.main(Test.java:30)
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Rinky Arora says:
June 1, 2016 at 12:02 PM
Hi,
i am using second approach of updating record in database (by creating new object),with version control , but its giving error :
org.hibernate.StaleObjectStateException: Row was updated or deleted by another transaction (or unsaved-value mapping was incorrect): [com.eric.employee.Employee_Info#4]
what does this error means , and why am getting this error only when using second approach of updation by creating new object, but with 1st approach ie. loading the object and then updating its executing smoothly.
Need ur help on this.
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Rinky Arora says:
June 1, 2016 at 12:08 PM
Hi,
i am using 2nd approach of updation (creating new object), and with versioning
its giving error : org.hibernate.StaleObjectStateException: Row was updated or deleted by another transaction (or unsaved-value mapping was incorrect): [com.eric.employee.Employee_Info#4]
Need ur help.
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Sonu says:
July 20, 2016 at 5:02 AM
is it possible to see all the update done on a object . I mean suppose 4 update has done on a particular object and I want to see all the update , update 1 ,update 2, ….. . like history.
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bala says:
July 25, 2016 at 7:24 AM
ERROR: ORA-00054: resource busy and acquire with NOWAIT specified or timeout expired
Jul 25, 2016 12:52:57 PM org.hibernate.tool.hbm2ddl.SchemaUpdate execute
INFO: HHH000232: Schema update complete
org.hibernate.internal.SessionFactoryImpl@657fa52d
Hibernate: select max(product_id) from product
Hibernate: insert into product (product_name, price, product_id) values (?, ?, ?)
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Raunak says:
August 9, 2016 at 8:25 AM
Hi,
I am using the concept of versioning and I am getting a exception like: “Row was updated or deleted”.
On my investigation I found that If version id of any record is greater than my inserted POJO object than this exception will occur.
Ex:- In DB employee table one employee version id is 2 and on the time of updating the same employee record my POJO object version id is 1 than its throwing the exception.
(In DB version id is incremented by some another thread)
So kindly suggest me some solution to handle version id with multi threading updation.
Thanks in advance.
Raunak
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sandhya says:
March 28, 2017 at 5:38 PM
Hello,
Thanks for providing this web site.
Thanks
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Veena Jakkireddy says:
October 8, 2017 at 5:50 AM
A very nice explanation. I always look into this website. I am becoming fan for your explanation. Thanks for providing this site.Doing great job.
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Praveen says:
October 24, 2017 at 5:44 AM
Hi, I'm getting this error while running this code.Please help me with this issue
log4j:WARN No appenders could be found for logger (org.hibernate.cfg.Environment).
log4j:WARN Please initialize the log4j system properly.
Exception in thread "main" java.lang.NullPointerException
at org.hibernate.cfg.Configuration.doConfigure(Configuration.java:1526)
at org.hibernate.cfg.Configuration.doConfigure(Configuration.java:1505)
at org.hibernate.cfg.Configuration.configure(Configuration.java:1425)
at ClientForSave.main(ClientForSave.java:10)
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Ravikumara says:
December 22, 2017 at 1:06 PM
In hibernates if we try to load an object which is not created yet.then what will happen? whether it creates a object?
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Susil says:
January 4, 2018 at 10:29 AM
How to configure version using annotation
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siva reddy says:
November 4, 2018 at 10:21 AM
what happens if i use saveorupdate() for existing record
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Basant says:
March 2, 2019 at 5:06 AM
Hi java4s,
What will happen if we update the record which are already exist in db but their version column is empty. Do we need to load those objects and save them so that 0 will be inserted and then update?
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Amol says:
May 22, 2019 at 6:22 PM
how to acheive hibernate versioning using annotations
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Ashpak says:
February 6, 2020 at 10:58 AM
Could you please provide some solution on below: it's urgent…Bro…req to joining
org.hibernate.StaleObjectStateException: Row was updated or deleted by another transaction (or unsaved-value mapping was incorrect) : [com.journaldev.spring.model.Person#1]
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