How to configure JDBCRealm to obtain its DataSource from JNDI

Question

How do you use a JDBCRealm to handle authenticating and authorizing users in servlets? The only example I can find is to create the DataSource in web.xml

Answer 1

I commented on @Les Hazlewood answer and on @Recurse comment, but might be that new answer is better option.

In my case I have to use only JDNI datasource name on weblogic and full path on tomcat:

Tomcat:

 ds = org.apache.shiro.jndi.JndiObjectFactory   
 ds.requiredType = javax.sql.DataSource  
 ds.resourceName = java:/comp/env/oracle/pportal_dev

 # JDBC realm config  
 jdbcRealm = org.apache.shiro.realm.jdbc.JdbcRealm  
 jdbcRealm.permissionsLookupEnabled = true 
 jdbcRealm = org.apache.shiro.realm.jdbc.JdbcRealm
 jdbcRealm.dataSource = $ds

Weblogic

 ds = org.apache.shiro.jndi.JndiObjectFactory   
 ds.requiredType = javax.sql.DataSource   
 ds.resourceName = oracle/pportal_dev

 # JDBC realm config  
 jdbcRealm = org.apache.shiro.realm.jdbc.JdbcRealm  
 jdbcRealm.permissionsLookupEnabled = true 
 jdbcRealm.dataSource = $ds

Note

ds.resourceName = java:/comp/env/oracle/pportal_dev 
vs
ds.resourceName = oracle/pportal_dev