Tratamento de concorrencia usando hibernate

Assuntos Gerais
#1

boa tarde,
eh possivel tratar concorrecia atraves do HibernateFilter?otimista ou pessimista?

[code]/*

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    */

package util;

import java.io.IOException;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.annotation.WebFilter;
import org.hibernate.HibernateException;
import org.hibernate.SessionFactory;

/**
*

  • @author Deivid
    /
    @WebFilter(filterName = “hibernateFilter”,urlPatterns = "/    ")
    public class HibernateFilter implements Filter{

    private SessionFactory sf;

    @Override
    public void init(FilterConfig filterConfig) throws ServletException {
    this.sf = HibernateUtil.getSessionFactory();
    }

    @Override
    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
    try {

         this.sf.getCurrentSession().beginTransaction();
     chain.doFilter(request, response);
     this.sf.getCurrentSession().getTransaction().commit();
     
 } catch (HibernateException | IOException | ServletException e) {
     try {
         if(this.sf.getCurrentSession().getTransaction().isActive()){
         this.sf.getCurrentSession().getTransaction().rollback();
         }
     } catch (HibernateException ee) {
     }
 }finally{
 
     this.sf.getCurrentSession().close();
 }

    }

    @Override
    public void destroy() {
    this.sf.close();
    }

}

[/code]

#2