@startuml
skinparam maxAsciiMessageLength 8

participant Publisher1 as P1
participant Publisher2 as P2
participant MessageBroker as MB
participant Subscriber1 as S1
participant Subscriber2 as S2


P1 -> MB : Message A
P2 -> MB : Message B
MB --> S1 : Message A
MB --> S2 : Message B
@enduml