The Initial JNDI Context and the JNDI Namespace
When you select the JNDI tab for a realm in the Enterprise Manager, if the initial JNDI context does not exist, you are prompted to create it. The Enterprise Manager creates the channel /naming/defaultContext in the namespace tree of the realm and, if the realm is part of a cluster, on all other cluster realms. When the channel is initially created, full permissions are assigned to the first client who creates it and to all other users and clients who want to use the channel.
Important:
If you delete the /naming/defaultContext channel, the JNDI context is destroyed and all existing JNDI references are lost.
After you create the JNDI context, you can view the JNDI namespace tree. The root of the tree is the JNDI provider URL. In the case of a cluster, the root shows a comma-separated list of RNAME values for each server in the cluster.
If you are using a horizontal scalability connection factory, the URL syntax enables you to specify multiple connection URLs, where each connection URL can specify either a standalone realm or a cluster.
The JNDI namespace tree also contains the following folders:
Connection Factories
Queue Connection Factories
Queues
Topic Connection Factories
Topics
XA Connection Factories
To update the contents of the JNDI namespace tree with any changes done outside the current Enterprise Manager instance, click Refresh.