See ISIS-1370 relating to the creation of a new PublisherService. (There are two many changes from PublishingService to sensibly have this as a refinement).
Specifically, the new PublisherService SPI should define:
/**
* To support implementations that allow the republishing of commands, eg onto an JMS message bus.
*/
@Programmatic
void republish(final ActionInvocationMementoDto aim);