Multicast statistics data is published by the broker in XML format.
The content of the three multicast reports is described below.
$SYS/Broker/<broker name>/ExecutionGroup/<execution group>/Statistics/Multicast/Summary
$SYS/Broker/<broker name>/ExecutionGroup/<execution group>/Statistics/Multicast/Groups
The last six fields listed above are repeated for each multicast group currently being used.
$SYS/Broker/<broker name>/ExecutionGroup/<execution group>/Statistics/Multicast/Topics
The last six fields listed above are repeated for each multicast topic currently being used.