## 3.3.2 JNDI DataSources

Since many Java EE containers typically supply `DataSource` instances via the Java Naming and Directory Interface (JNDI). Sometimes you are required to look-up a `DataSource` via JNDI.

Grails supports the definition of JNDI data sources as follows:

    dataSource {
        jndiName = "java:comp/env/myDataSource"
    }

The format on the JNDI name may vary from container to container, but the way you define the `DataSource` remains the same.