I just sent an epic pull request towards ActiveMQ Artemis today.https://github.com/apache/activemq-artemis/pull/749
After this Artemis will monitor disk usage, and block or fail producers.
There is now a global limit for the server's memory before address start into page mode. Before you would need to specify the limit per address. Now you can have a global limit.
Besides this, artemis is getting into a nice shape for 1.4.0. I'm really excited about it coming up this week, and I should post a video or something this week on how to start a server.