Custom Identifiers

Grinvon · **Joined:** Tue Dec 18, 2007 9:15 am **Posts:** 14

I am implementing IdentifierGenerator interface for custom identifiers.

When I execute the main class at first time (database is clear, no objects, and execute DDL). The CreateID class generate IDs as well.

When I execute again the main class (without drop database tables and maintainning rows) the application raise up error saying duplicade keys were generated and tried to be commited.

But when I see all keys generated all keys are completally differents at runtime and at database, I cannot understand why app throws this exception.

Thanks all!

Code:

import java.io.Serializable;
import java.util.Random;
import org.hibernate.HibernateException;
import org.hibernate.engine.SessionImplementor;
import org.hibernate.id.IdentifierGenerator;

/**
 *
 * @date 09/01/2008
 * @since 1.0
 * @version 1.0
 * por Inocêncio T. de Oliveira
 */
public class CreateID implements IdentifierGenerator {
    
    public Serializable generate(SessionImplementor pSession, Object pObj) throws HibernateException {
        
        Serializable lPkValue = null;
        Long lId = 0l;
        String lTemp = "";
        
        if (JPASyncUtil.getMode() == JPASyncUtil.DB_STATUS_DEFAULT) {
            
            //temporariamente usada
            lTemp = String.valueOf((Math.abs(new Random().nextInt())) / 1000) +
                    String.valueOf(new java.util.Date().getTime() / 100);
            
            lId = Long.valueOf(lTemp);
            
            lPkValue = lId;
            
        }
        return lPkValue;
    }

}

Erro:

Code:

Caused by: java.sql.SQLException: Violation of UNIQUE KEY constraint 'UQ__ADT_AUDITORIA__7D39791C'. Cannot insert duplicate key in object 'ADT_AUDITORIA'.