Code to list all the entries in jndi on remote machine

Question

Can any one tell or point me to code to list all the jndi entries in a remote machine

Answer 1

It is possible to list all entries of an InitialContext. You can use this snippet:

InitialContext ctx = new InitialContext(); NamingEnumeration<NameClassPair> list = ctx.list(""); while (list.hasMore()) {   System.out.println(list.next().getName()); } 

If you are using an application server, there is usually the option to browse the JNDI tree.

Answer 2

The previous answers didn't give me the "full picture" (on Tomcat7), so I've thrown together the following amalgamation, which converts the JNDI values to a Tree Map (with toString values):

import javax.naming.*; ...  public static Map toMap(Context ctx) throws NamingException {     String namespace = ctx instanceof InitialContext ? ctx.getNameInNamespace() : "";     HashMap<String, Object> map = new HashMap<String, Object>();     log.info("> Listing namespace: " + namespace);     NamingEnumeration<NameClassPair> list = ctx.list(namespace);     while (list.hasMoreElements()) {         NameClassPair next = list.next();         String name = next.getName();         String jndiPath = namespace + name;         Object lookup;         try {             log.info("> Looking up name: " + jndiPath);             Object tmp = ctx.lookup(jndiPath);             if (tmp instanceof Context) {                 lookup = toMap((Context) tmp);             } else {                 lookup = tmp.toString();             }         } catch (Throwable t) {             lookup = t.getMessage();         }         map.put(name, lookup);      }     return map; } 

Usage:

toMap(new InitialContext()); 

Gives the following output in Tomcat7:

{   "comp": {     "env": {       "myCustomVar": "foobar"     },     "UserTransaction": "Cannot create resource instance",     "Resources": {       "index.html": "org.apache.naming.resources.FileDirContext$FileResource@32edeea8",       "WEB-INF": {         "ibm-web-ext.xml": "org.apache.naming.resources.FileDirContext$FileResource@6132b73b",         "ibm-web-bnd.xml": "org.apache.naming.resources.FileDirContext$FileResource@22cf71b7"       }     }   } }