Oracle ATG Web Commerce includes a number of JMS-related tools, which are known collectively as the Dynamo Messaging System (DMS). The main parts of DMS are:

The different DMS pieces can be used independently. For example, you can use Local JMS, SQL JMS, or both, with or without Patch Bay. You can use a third-party JMS provider, or use the JMS implementation provided with your application server, also with or without Patch Bay. For more information about other JMS providers you can use, see the documentation for your application server.