queueing functionality in greengrass core

Question

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.

clogwog · Answer

@zhengangataws thank you ! I'm looking into this option right now.

clogwog · Answer

@zhengangataws  with this answer can i subscribe to the greengrass core's local topic using   
https://docs.aws.amazon.com/greengrass/v2/developerguide/ipc-publish-subscribe.html#ipc-operation-subscribetotopic  
  
I'm asking because i can't see a 'session' in setting up subscription here..    
or doest the ipcClient keep a session ?  
  
Or were you suggesting that i install the moquette greengrass component ? If so, then what should I use as a client to subscribe to the 'queue' ?

clogwog · Answer

I have a follow up question about the actual implementation of the suggested solution (see previous comment)

queueing functionality in greengrass core

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