HistoryItem hi1 = (HistoryItem)session1.load(HistoryItem.class,identifier,LockMode.UPGRADE);

<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-2.0.dtd">
<hibernate-mapping>
  <class name='de.itls.tls.hibernate.HistoryItem' dynamic-update='true' table='RL2FT0W.FTV312'>
    <id name='id' column='i_R_ID' type='long' unsaved-value='0' access='field'>
      <generator class='native'></generator>
    </id>
    <property name='text' type='string' column='i_TEXT' access='field'></property>
    <property name='date' type='timestamp' column='i_DATE' access='field'></property>
  </class>

 
</hibernate-mapping>

      Session session1 = sf.openSession();
      Session session2 = sf.openSession();
      Transaction t1 = session1.beginTransaction();
      Transaction t2 = session2.beginTransaction();
     
// Session 1 reads exclusiv     
      HistoryItem hi1 = (HistoryItem)session1.load(HistoryItem.class,identifier,LockMode.UPGRADE);

   
// Session 2 also tries to read exclusiv
      HistoryItem hi2 = (HistoryItem)session2.load(HistoryItem.class,identifier,LockMode.UPGRADE);
// There is no lock
      hi2.setText("HistoryItem 2");
      session2.update(hi2);

      t1.commit();
      t2.commit();

package de.itls.tls.hibernate;

import de.mywms.log.LogSingleton;
import de.mywms.util.Util;

import java.util.Date;
import java.io.Serializable;

/**
* The HistoryItem is used by the process to make some notes in conjunction
* with the current time.
* A list of HistoryItems can be used to be visualized at a control station.
*
*/
public class HistoryItem
  implements Serializable,
             Cloneable
{
  // -------------------------------------------------------------------------
 
  private Long id ; //needed by hibernate
  private int version; // needed by hibernate

  /**
   * Holds value of property text.
   */
  private String text = "";
 
  /**
   * Holds value of property date.
   */
  private Date date = new Date(System.currentTimeMillis());
 
 
  // -------------------------------------------------------------------------
  // properties
  // -------------------------------------------------------------------------

  void setVersion( int version )
  {
    this.version = version;
  }
  int getVersion()
  {
    return version;
  }
  /**
   * Getter for property text.
   * @return Value of property text.
   */
  public String getText() {
    return this.text;
  } 
 
  /**
   * Setter for property text.
   * @param text New value of property text.
   */
  public void setText(String text) {
    // assertion
    Util.checkNull(text);
   
    // assignment
    this.text = text;
  }
 
  // -------------------------------------------------------------------------

  /**
   * Getter for property date.
   * @return Value of property date.
   */
  public Date getDate() {
    return this.date;
  }
 
  /**
   * Setter for property date.
   * @param date New value of property date.
   */
  public void setDate(Date date) {
    // assertion
    if(date == null) {
      throw new NullPointerException();
    }
   
    // assignment
    this.date = date;
  }
 
  // -------------------------------------------------------------------------
 
  public Object clone() {
    HistoryItem hi;
    try {
      hi = (HistoryItem)super.clone();
      hi.date = (Date)this.date.clone();
      return hi;
    }
    catch (CloneNotSupportedException ex) {
      LogSingleton.logError(ex.toString(),ex);
      return null;
    }
  }
 
  // -------------------------------------------------------------------------
 
  public boolean equals(Object obj) {
    if(obj == this) {
      return true;
    }
   
    if(!(obj instanceof HistoryItem)) {
      return false;
    }
   
    HistoryItem hi = (HistoryItem)obj;
   
    return    date.equals(hi.date) && text.equals(hi.text);
     
  }
 
}