Sun GlassFish Message Queue 4.4 Developer's Guide for Java Clients

Assigning Client Identifiers

A connection can have a client identifier. This identifier is used to associate a JMS client’s connection to a message service, with state information maintained by the message service for that client. The JMS provider must ensure that a client identifier is unique, and applies to only one connection at a time. Currently, client identifiers are used to maintain state for durable subscribers. In defining a client identifier, you can use a special variable substitution syntax that allows multiple connections to be created from a single ConnectionFactory object using different user name parameters to generate unique client identifiers. These connections can be used by multiple durable subscribers without naming conflicts or lack of security.

Message Queue allows client identifiers to be set in one of two ways: