refactor

doc/server/sq_02_srvmessaging.puml

@@ -0,0 +1,30 @@
+@startuml "Messaging with server delivery"
+actor       Sender as snd
+actor       Receiver   as rcv
+control     Server     as srv
+collections msg as msg
+queue       msgch       as msgch
+collections dvyrq as dvyrq
+collections dvy as dvy
+queue       dvych as dvych
+
+
+rcv->srv: Listen for messages
+srv->msgch: Subscribe
+snd->srv: Send message with delivery uid
+snd->msg: Listen for delivery
+
+group storeMessage
+    srv->msg: Store message
+    srv->dvyrq: Store delivery request uid=>Receiver
+    srv->msgch: Notify listening receivers
+end
+msgch->srv: Notify
+msg->srv: Grab message
+srv->rcv: Cuts listening with message
+srv->dvy: Store delivery done Receiver=>uid
+srv->dvych: Notify listening Sender
+dvych->srv: Notify
+dvy->srv: Grab delivery
+srv->snd: Cuts listening with delivery
+@enduml