JNDI

Java Naming and Naming Interface if part of Java SE:

1. Standard API to interact with naming and directory services
2. Provide the ability to look up things in a “registry”
3. Used in enterprise solutions to locate resources such as EJBs, JMS queues or Web Services

JNDI resources are organized in tree structure:

1. Analogues to the folder structure of a computer’s file system
2. Supports events, lookups, and complex searching against structure

App->JNDI->JNDI IMPL->DS

Finding EJB with JNDI uses four key concepts:

1. Context
2. Initial context
3. Path & Name
4. Search

Simple JNDI lookup:

String jndiPath = com.development.tutorials.ejb3.RemoteCalculator;

try{

   calculator = (RemoteCalculator) c.lookup(jndiPath);

}

Problems with JNDI
1. Keep track of JNDI path
2. Bean name

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