RE: OptimisticLockException in PB Api

[Ajitesh Das]

I have checked org.apache.ojb.tutorial1.UCEnterNewProduct.apply() ... my main2() 
method is also same in nature..how come urs is woking and mine is not :( 
 

        -----Original Message----- 
        From: Ajitesh Das 
        Sent: Wed 2/26/2003 1:14 AM 
        To: OJB Users List; OJB Users List 
        Cc: 
        Subject: OptimisticLockException in PB Api
        
        

        I was trying a simple Test program. where I am setting a set of objects and 
what to write them  in a DB.I am using PB Api. The very first write is a success but 
throwing exception from 2nd write onwards. What I am doing wrong ?
        
        org.apache.ojb.broker.OptimisticLockException: Object has been modified by 
someone else
         at Test1.main2(Test1.java:64)
         at Test1.<init>(Test1.java:23)
         at Test1.main(Test1.java:27)
        Caused by: org.apache.ojb.broker.OptimisticLockException: Object has been 
modified by someone else
         at org.apache.ojb.broker.accesslayer.JdbcAccess.executeUpdate(Unknown Source)
         at org.apache.ojb.broker.singlevm.PersistenceBrokerImpl.storeToDb(Unknown 
Source)
         at org.apache.ojb.broker.singlevm.PersistenceBrokerImpl.store(Unknown Source)
         at org.apache.ojb.broker.singlevm.PersistenceBrokerImpl.store(Unknown Source)
         at org.apache.ojb.broker.singlevm.PersistenceBrokerImpl.store(Unknown Source)
         at org.apache.ojb.broker.singlevm.DelegatingPersistenceBroker.store(Unknown 
Source)
         
        Here is my caller method:
           
        public Test1 ()
         {
          main2();
          main2();
         }
        
        And here is the called method
        
            public void main2 ( )
        {
            PersistenceManager pm = null;
            Transaction tx = null;
            Sample zs = new Sample();
            zs.setAttr1((long)10);
            zs.setAttr2(30);
             zs.setAttr3((long)40);       
        
            try {
             pm = PersistenceManager.getInstance(); // return 
Broker.defaultPersistenceBroker()
             pm.beginTransaction();
             pm.Store(zs);
             pm.commitTransaction();
            
         }
         catch (Exception ex) {
             ex.printStackTrace();
             System.out.println("Error in Test1 1 ");
             try {
                 if ( tx != null )
                      pm.abortTransaction();
        
             catch (Exception ex1) {
             }
         }