I'm also not sure how the above projects relate. As far as the scope of the blog goes, Apollo seems to be ruled out as it is not replicated. ActiveMQ does have

I'm also not sure how the above projects relate. As far as the scope of the blog goes, Apollo seems to be ruled out as it is not replicated. ActiveMQ does have replication, but they don't really sound convincing in the docs that it's first-class ;)