Before the release of Version 3.7 UR1, the Sun Java System Message Queue product was available in two editions, Platform and Enterprise, each containing different features and corresponding to a different licensed capacity. Versions beginning with 3.7 UR1 combine the functionality of both editions. If you have an earlier version installed under a Platform Edition license, upgrading to Version 4.3 will give you access to the full range of Message Queue functionality, including the following features formerly available only under the Enterprise Edition license:
Multiple-broker clusters
Scalable connection capability
Secure connection services
Hypertext Transfer Protocol (HTTP) and Secure Hypertext Transfer Protocol HTTPS) connections
Queue delivery to more than three consumers
C client support
In addition, the following features, added since the Platform and Enterprise Editions were combined, are available to all users of Version 4.3:
High-availability message services
Support for plug-in client authentication using Java Authentication and Authorization Services (JAAS)
Connection event notification
Client runtime logging
Enhanced broker administration
Programmatic configuration and monitoring of Message Queue operations by means of the Java Management Extensions (JMX) API and monitoring by means of the Java Enterprise System Monitoring Framework (JESMF)