Monitor spec

doc/feature/monitor.md

@@ -0,0 +1,34 @@
+Subscription Monitor {#monitor}
+============
+
+To enable an application to republish all its state when a new subscriber
+connected, we need a way to monitor connection requests. This RFC describes this
+feature for this use case, based on zmq_socket_monitor.
+
+## API
+
+    class Sender
+    {
+        virtual void* getSocket() = 0;
+    };
+
+    class Publisher : public Sender {};
+
+    class Monitor : public Receiver
+    {
+        Monitor( Sender& sender );
+        Monitor( Sender& sender, Receiver& shared );
+
+        virtual notifyNewConnection() {}
+        // other notifies and params lazy, on use case
+    };
+
+## Examples
+
+   Livre Communicator derives from Monitor and republishes all events on notify.
+
+
+## Implementation
+
+Monitor installs zmq_socket_monitor() on Sender::getSocket(). Monitor::process()
+calls Monitor::notifyNewConnection().

doc/feature/rfcs.md

@@ -9,3 +9,4 @@ RFCs {#rfcs}
 * @subpage restapi
 * @subpage restapi
 * @subpage reqrep
+* @subpage monitor