SE452: JNDI [2/18]

JNDI - Java Naming and Directory Interface

Helps to integrate Java programs into their environment.

Independent of any directory implementation, so can use used to support DNS, NDS, LDAP, NIS

Context - A set of name to object bindings

Naming Systems and Namespaces - A connected set of Contexts

JNDI classes are in javax.naming.*

To use JNDI:

• Get a Context
  • Start with the InitialContext, then lookup others from there: Context ctx = new InitialContext()
• Use lookup() to get an object from its name. Printer printer = (Printer)ctx.lookup("treekiller"); printer.print(report);
• A NamingException is thrown if there are problems in the directory tasks