Avis is a multicast event bus. It provides a fast, publish/subscribe event routing service compatible with the commercial Elvin implementation developed by Mantara Software.Elvin routers can be federated together to form wide-area event notification networks. Clients can exchange events with other clients anywhere on the bus, subscribing to messages using pattern-matching expressions that will select messages based on their content.What\'s New in This Release: [ read full changelog ]· Fixed bug that stopped secure messages being federated between Avis and Mantara elvind routers. Note that this fix means that Avis 1.2.2 will not federate secure messages with previous Avis router releases.