simple
messager
.publish(text("hello"))
.to(user("admin"))
.send();
send object to topic
messager
.publish(object(user))
.to(topic("user-login"))
.send();
subscribe topic
messager
.subscribe(topic("user-login"))
.iam(user("admin"))
.onMessage(user->System.out.println(user));
subscribe user msg
messager
.subscribe(user("admin"))
.onMessage(message->System.out.println(message));