C3p0 com hibernate & spring

@m.dornelles19 escreveu:

Olá gente,

Estou com um problema de excesso de conexões no postgresql em uma aplicação web com spring-mvc e hibernate, por isso estou tentando usar um pool de conexões utilizando o c3p0.
A princípio eu tentei fazer o hibernate gerenciar o pool.
Porém, não consegui encontrar o que eu preciso mudar na ConnectionFactory.
Está tudo funcionando okay, mas ele não está gerenciando as conexões e continua explodindo o número de conexões do banco.

Alguém pode me ajudar?

Eu configurei o c3p0 no hibernate.cfg.xml dessa forma:

<?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="hibernate.dialect">org.hibernate.dialect.PostgreSQLDialect</property>
        <property name="hibernate.connection.driver_class">org.postgresql.Driver</property>
        <property name="hibernate.connection.url">jdbc:postgresql://localhost:5432/fxdb</property>
        <property name="hibernate.connection.username">postgres</property>
        <property name="hibernate.connection.password">123</property>
        <property name="hibernate.show_sql">true</property>
        
        <property name="hibernate.connection.provider_class">org.hibernate.c3p0.internal.C3P0ConnectionProvider</property>
        <property name="hibernate.c3p0.min_size">5</property>
        <property name="hibernate.c3p0.max_size">600</property>
        <property name="hibernate.c3p0.timeout">1800</property>
        <property name="hibernate.c3p0.max_statements">50</property>
        <property name="hibernate.c3p0.idle_test_period">1800</property>
        <property name="hibernate.c3p0.validate">true</property>
        <property name="hibernate.connection.provider_class">org.hibernate.c3p0.internal.C3P0ConnectionProvider</property>

        
        <mapping class="com.fxdb.model.DiseaseHistory"/>
        <mapping class="com.fxdb.model.File"/>
        <mapping class="com.fxdb.model.IntoleranceHistory"/>
        <mapping class="com.fxdb.model.MaximumScore"/>
        <mapping class="com.fxdb.model.MutationsBase"/>
        <mapping class="com.fxdb.model.Lifestyle"/>
        <mapping class="com.fxdb.model.Person"/>
        <mapping class="com.fxdb.model.PersonMutation"/>
    </session-factory>
</hibernate-configuration>

Estou criando as conexões desta forma:

public class ConnectionFactory {
     public Session getSession() throws HibernateException {
        
        Configuration configuration = new Configuration();
        configuration.configure();
        //SessionFactory factory = configuration.buildSessionFactory(null);
        //serviceRegistry = new ServiceRegistryBuilder().applySettings(configuration.getProperties()).buildServiceRegistry();
        ServiceRegistry serviceRegistry = new StandardServiceRegistryBuilder().applySettings(
                configuration.getProperties()).build();
        SessionFactory sessionFactory = configuration.buildSessionFactory(serviceRegistry);
        Session session = sessionFactory.openSession();
        return session;

    }
}

Uma DAO apenas para conhecimento:

/*
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 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package com.fxdb.dao;

import com.fxdb.model.DiseaseHistory;
import java.util.ArrayList;
import java.util.List;
import org.hibernate.HibernateException;
import org.hibernate.Query;
import org.hibernate.Session;
import org.hibernate.Transaction;

/**
 *
 * @author mariana
 */
public class DiseaseHistoryDAO {

    private Transaction tx;
    private ConnectionFactory connectionFactory;
    private Session session;

    public Session getSession() throws HibernateException {
        this.connectionFactory = new ConnectionFactory();
        this.session = this.connectionFactory.getSession();
        return session;
    }

    public DiseaseHistory save(DiseaseHistory diseaseHistory) {
        try {
            this.session = getSession();
            this.tx = this.session.beginTransaction();
            this.session.save(diseaseHistory);
            tx.commit();
            return diseaseHistory;
        } catch (Exception E) {
            System.out.println("Exception = " + E.toString());
            return null;
        }
    }

    public void update(DiseaseHistory diseaseHistory) {
        try {
            this.session = getSession();
            this.tx = this.session.beginTransaction();
            this.session.update(diseaseHistory);
            this.tx.commit();
        } catch (Exception E) {
            System.out.println("Exception = " + E.toString());
        }
    }

    public DiseaseHistory findById(Integer id) {
        try {
            DiseaseHistory diseaseHistory = new DiseaseHistory();
            this.session = getSession();
            this.tx = this.session.beginTransaction();
            Query query = session.getNamedQuery("DiseaseHistory.findById");
            query.setInteger("id", id);
            diseaseHistory = (DiseaseHistory) query.uniqueResult();
            this.tx.commit();
            this.session.close();
            return diseaseHistory;
        } catch (Exception E) {
            System.out.println("Exception = " + E.toString());
            return null;
        }

    }

    public List<DiseaseHistory> listAll() {
        try {
            DiseaseHistory diseaseHistory = new DiseaseHistory();
            List lista = new ArrayList<DiseaseHistory>();
            this.session = getSession();
            this.tx = this.session.beginTransaction();
            Query query = session.getNamedQuery("DiseaseHistory.findAll");
            lista = query.list();
            this.tx.commit();
            this.session.close();
            return lista;
        } catch (Exception E) {
            System.out.println("Exception = " + E.toString());
            return null;
        }
    }

    public void delete(DiseaseHistory diseaseHistory) {
        try {
            this.session = getSession();
            this.tx = this.session.beginTransaction();
            this.session.delete(diseaseHistory);
            this.tx.commit();
        } catch (Exception E) {
            System.out.println("Exception = " + E.toString());
        }
    }

}

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