kahaDB ActiveMQ

kahaDB is a file based persistence database. Message broker use this to store messages.

In a scenario where you want to schedule or delay the messages in activeMQ, Message broker use kahaDB to store the message before send to message que after predefined time interval.

Use case where we have used kahaDB to schedule activemq.

https://explainjava.blogspot.com/2020/08/schedule-or-delay-message-activemq.html