<?xml version="1.0" encoding="UTF-8"?>
<persistence xmlns="http://java.sun.com/xml/ns/persistence"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/persistence
  http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd"
version="2.0">


<persistence-unit name="postgreSQL">
    <provider>org.hibernate.ejb.HibernatePersistence</provider>

    <properties>
        <property name="javax.persistence.jdbc.driver" value="org.postgresql.Driver" />

        <property name="javax.persistence.jdbc.url" value="jdbc:postgresql://localhost:5432/tfProjeto" />

        <property name="javax.persistence.jdbc.user" value="postgres" />
        <property name="javax.persistence.jdbc.password" value="admin" />

        <property name="hibernate.dialect" value="org.hibernate.dialect.PostgreSQLDialect" />
        <property name="hibernate.connection.CharSet" value="UTF-8" />
        <property name="hibernate.connection.characterEncoding" value="UTF-8" />
        <property name="hibernate.connection.useUnicode" value="true" />

        <property name="hibernate.show_sql" value="true" />
        <property name="hibernate.format_sql" value="true" />
        <property name="hibernate.hbm2ddl.auto" value="update" />


        <property name="hibernate.c3p0.min_size" value="5" />
        <property name="hibernate.c3p0.max_size" value="10" />
        <property name="hibernate.c3p0.timeout" value="1800" />
        <property name="hibernate.c3p0.max_statements" value="50" />


    </properties>
</persistence-unit>

<persistence-unit name="mySQL">
    <provider>org.hibernate.ejb.HibernatePersistence</provider>

    <properties>
        <property name="javax.persistence.jdbc.driver" value="com.mysql.jdbc.Driver" />
        <property name="javax.persistence.jdbc.url" value="jdbc:mysql:/localhost:3306/meuProjeto?zeroDateTimeBehavior=convertToNull" />

        <property name="javax.persistence.jdbc.user" value="root" />
        <property name="javax.persistence.jdbc.password" value="admin" />

        <property name="hibernate.dialect" value="org.hibernate.dialect.MySQLDialect" />
        <property name="hibernate.connection.CharSet" value="UTF-8" />
        <property name="hibernate.connection.characterEncoding" value="UTF-8" />
        <property name="hibernate.connection.useUnicode" value="true" />

        <property name="hibernate.show_sql" value="true" />
        <property name="hibernate.format_sql" value="true" />
        <property name="hibernate.hbm2ddl.auto" value="update" />


        <property name="hibernate.c3p0.min_size" value="5" />
        <property name="hibernate.c3p0.max_size" value="10" />
        <property name="hibernate.c3p0.timeout" value="1800" />
        <property name="hibernate.c3p0.max_statements" value="50" />


    </properties>
</persistence-unit>

@RequestScoped
public class EntityFactory implements Serializable {
/**
 *
 */
private static final long serialVersionUID = 1L;
public static EntityManagerFactory entityManagerFactory;
public static EntityManagerFactory entityManagerFactoryMySQL;

public static void initializeEntityManager() {
    if ((entityManagerFactory == null) || (!entityManagerFactory.isOpen())) {
        entityManagerFactory = Persistence
                .createEntityManagerFactory("postgreSQL");
    }
}

public static void initializeEntityManagerMySql() {
    if ((entityManagerFactoryMySQL == null)
            || (!entityManagerFactoryMySQL.isOpen())) {
        entityManagerFactoryMySQL = Persistence
                .createEntityManagerFactory("mySQL");
    }

}

}