Uhmmm not at all.
Broker is something else than a JMS provider. wM concept of documentType will work only with IS local publish and broker.
If local publishing is fine with you, and you do not need a remote Broker that’s fine. But many functionalities would require publish doctypes.
Now when it comes to regular JMS pub/sub webMethods support ONLY the following providers ( http://techcommunity.softwareag.com/ecosystem/documentation/webmethods/wmsuite8_ga/Integration_Server_and_Process_Engine/8-0-SP1_Administering_Integration_Server.pdf page 189)
As you can see while talking about OpenSource only Jboss fits here.
Other might work but you better do not have a problem and need to contact support.
Aside from price contraints, why aren’t you able to use wM Broker?
#webMethods-Architecture#webMethods-General#Integration-Server-and-ESB#webMethods