queueing functionality in greengrass core

Hello,

I am in need of some queue-ing that will persist in-between reboots, and have the ability to have multiple messages stored in the queue until they are removed from the queue.

Seeing the the greengrass-core already has implemented a local mqtt broker, I was wondering if there was something in greengrass-core that handles queueing with persistence.

if this is available i am looking for the name of this so i can search

if it isn't what is usually used ? should I use 0mq or another message queuing system. I know this is very individual, so previous experience with a preference would be highly appreciated.