Event¶
Purpose¶
An event sent to a topic.
Type¶
Reception:
Record with fields:
topic: TopicIdentity
Topic the event is published to
publisher: EngineIdentity
PubSub engine identity of pulisher
seq: u32
Sequence number of publisher
deps: Vec
Events this event depends on
seen: Vec
Independent events recently seen
body: Vec
Encapsulated EngineMessage
sig: Signature
Signature by publisher over the above fields
Triggers:
Event
Behaviour¶
The Event is forwarded in the network along topic dissemination paths. It contains an encapsulated EngineMessage addressed from an engine to the topic.
The PubSub engine delivers the encapsulated EngineMessage to local engines by sending it to the Router, which forwards it to local engines subscribed to the topic.
Message flow¶
sequenceDiagram
%% --8<-- [start:sequence]
Router -) PubSub: EngineMessage
PubSub -) PubSub: Event
PubSub -) Router: EngineMessage
Router -) Any Local Engine: EngineMessage
%% --8<-- [end:sequence]