There is a microservices system that is currently using Zookeeper. Let's assume there is just one type of service
A that exhibits a simple read of some value
t. However, the one of existing A instances has scheduled task that updates
t from time to time and its notify other through message bus that value has been changed.
I want pull everything back from Zookeeper and find a better way to do such job scheduling across multiple instances. I thought about getting a delayed queue that will send a message to just one of group and it will post another delayed message to exchange pipe. However, such implementation in RabbitMQ requires additional add-on and I am looking for something better.