java - How can I set Datasource when I'm creating Hibernate SessionFactory?

Question

I'm creating SessionFactory and I have my datasource as object in code where I'm creating SessionFactory, but i cannot set datasource to Hibernate Configuration object. So how can I set my datasource to my SessionFactory?

Configuration configuration = new Configuration();
Properties properties = new Properties();
properties.setProperty("hibernate.dialect", "org.hibernate.dialect.MySQLInnoDBDialect");
configuration.setProperties(properties);
configuration.setProperty("packagesToScan", "com.my.app");
SessionFactory sessionFactory = configuration.configure().buildSessionFactory();

Answer 1

If you happen to have your DataSource stored in JNDI, then simply use:

configuration.setProperty(
    "hibernate.connection.datasource",
    "java:comp/env/jdbc/yourDataSource");

But if you use a custom data source provider like Apache DBCP or BoneCP and you don't want to use a dependency injection framework like Spring, then you may inject it on the StandardServiceRegistryBuilder before creating the SessionFactory:

//retrieve your DataSource
DataSource dataSource = ...;
Configuration configuration = new Configuration()
    .configure();
//create the SessionFactory from configuration
SessionFactory sf = configuration
    .buildSessionFactory(
        new StandardServiceRegistryBuilder()
            .applySettings(configuration.getProperties())
            //here you apply the custom dataSource
            .applySetting(Environment.DATASOURCE, dataSource)
            .build());

Note that if you use this approach, you don't need to put the connection parameters in your hibernate.cfg.xml anymore. Here's an example of a compatible hibernate.cfg.xml file when using approach from above:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-configuration PUBLIC
        "-//Hibernate/Hibernate Configuration DTD 3.0//EN"
        "http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">
<hibernate-configuration>

    <session-factory>
        <property name="hibernate.dialect">org.hibernate.dialect.MySQLInnoDBDialect</property>
        <property name="show_sql">false</property>
        <!-- your mappings to classes go here -->
    </session-factory>
</hibernate-configuration>

Code above tested on Hibernate 4.3.