Research dbus-broker

https://github.com/bus1/dbus-broker/wiki

From docs:

The dbus-broker project is an implementation of a message bus as defined by the D-Bus specification. Its aim is to provide high performance and reliability, while keeping compatibility to the D-Bus reference implementation. It is exclusively written for linux systems, and makes use of many modern features provided by recent linux kernel releases.

While compatibility to existing D-Bus implementations is crucial, there are several situations where dbus-broker deviates from existing practices, and provides its own solutions. All these deviations are documented.

It is possible to use dbus-broker as a drop-in replacement for the reference implementation, as described below, but it is also possible to integrate the message broker directly as an isolated process without any side-effects or file-system access.