fsrc-core/src/event_man.rs

@@ -15,7 +15,10 @@ pub trait EventListener<Provider: GenericEvent> {
     type Error;
 
     fn id(&self) -> u32;
-    fn send_to(&mut self, event: Provider) -> Result<(), Self::Error>;
+    fn send_to_no_data(&mut self, event: Provider) -> Result<(), Self::Error> {
+        self.send_to(event, None)
+    }
+    fn send_to(&mut self, event: Provider, aux_data: Option<&[u8]>) -> Result<(), Self::Error>;
 }
 
 struct Listener<E, Provider: GenericEvent> {
@@ -24,7 +27,7 @@ struct Listener<E, Provider: GenericEvent> {
 }
 
 pub trait ReceivesAllEvent<Provider: GenericEvent> {
-    fn receive(&mut self) -> Option<Provider>;
+    fn receive(&mut self) -> Option<(Provider, Option<&[u8]>)>;
 }
 
 pub struct EventManager<E, Provider: GenericEvent> {
@@ -114,23 +117,28 @@ impl<E, Provider: GenericEvent + Copy> EventManager<E, Provider> {
     pub fn try_event_handling(&mut self) -> Result<HandlerResult<Provider>, E> {
         let mut err_status = None;
         let mut num_recipients = 0;
-        let mut send_handler = |event: Provider, llist: &mut Vec<Listener<E, Provider>>| {
-            for listener in llist.iter_mut() {
-                if let Err(e) = listener.dest.send_to(event) {
-                    err_status = Some(Err(e));
-                } else {
-                    num_recipients += 1;
+        let mut send_handler =
+            |event: Provider, aux_data: Option<&[u8]>, llist: &mut Vec<Listener<E, Provider>>| {
+                for listener in llist.iter_mut() {
+                    if let Err(e) = listener.dest.send_to(event, aux_data) {
+                        err_status = Some(Err(e));
+                    } else {
+                        num_recipients += 1;
+                    }
                 }
-            }
-        };
-        if let Some(event) = self.event_receiver.receive() {
+            };
+        if let Some((event, aux_data)) = self.event_receiver.receive() {
             let single_key = ListenerType::Single(event.raw_as_largest_type());
             if self.listeners.contains_key(&single_key) {
-                send_handler(event, self.listeners.get_mut(&single_key).unwrap());
+                send_handler(
+                    event,
+                    aux_data,
+                    self.listeners.get_mut(&single_key).unwrap(),
+                );
             }
             let group_key = ListenerType::Group(event.group_id_as_largest_type());
             if self.listeners.contains_key(&group_key) {
-                send_handler(event, self.listeners.get_mut(&group_key).unwrap());
+                send_handler(event, aux_data, self.listeners.get_mut(&group_key).unwrap());
             }
             if let Some(err) = err_status {
                 return err;
@@ -151,36 +159,46 @@ mod tests {
     use std::thread;
     use std::time::Duration;
 
-    struct EventReceiver {
-        mpsc_receiver: Receiver<EventU32>,
+    type EventAndParams<'a> = (EventU32, Option<&'a [u8]>);
+
+    struct EventReceiver<'a> {
+        mpsc_receiver: Receiver<EventAndParams<'a>>,
     }
-    impl ReceivesAllEvent<EventU32> for EventReceiver {
-        fn receive(&mut self) -> Option<EventU32> {
-            self.mpsc_receiver.try_recv().ok()
+
+    impl ReceivesAllEvent<EventU32> for EventReceiver<'_> {
+        fn receive(&mut self) -> Option<(EventU32, Option<&[u8]>)> {
+            if let Some((event, _params)) = self.mpsc_receiver.try_recv().ok() {
+                return Some((event, None));
+            }
+            None
         }
     }
 
     #[derive(Clone)]
-    struct MpscEventSenderQueue {
+    struct MpscEventSenderQueue<'a> {
         id: u32,
-        mpsc_sender: Sender<EventU32>,
+        mpsc_sender: Sender<EventAndParams<'a>>,
     }
 
-    impl EventListener<EventU32> for MpscEventSenderQueue {
-        type Error = SendError<EventU32>;
+    impl<'a> EventListener<EventU32> for MpscEventSenderQueue<'a> {
+        type Error = SendError<EventAndParams<'a>>;
 
         fn id(&self) -> u32 {
             self.id
         }
-        fn send_to(&mut self, event: EventU32) -> Result<(), Self::Error> {
-            self.mpsc_sender.send(event)
+        fn send_to(
+            &mut self,
+            event: EventU32,
+            _aux_data: Option<&[u8]>,
+        ) -> Result<(), Self::Error> {
+            self.mpsc_sender.send((event, None))
         }
     }
 
-    fn check_next_event(expected: EventU32, receiver: &Receiver<EventU32>) {
+    fn check_next_event(expected: EventU32, receiver: &Receiver<EventAndParams>) {
         for _ in 0..5 {
             if let Ok(event) = receiver.try_recv() {
-                assert_eq!(event, expected);
+                assert_eq!(event.0, expected);
                 break;
             }
             thread::sleep(Duration::from_millis(1));
@@ -205,7 +223,7 @@ mod tests {
         let event_man_receiver = EventReceiver {
             mpsc_receiver: manager_queue,
         };
-        let mut event_man: EventManager<SendError<EventU32>, EventU32> =
+        let mut event_man: EventManager<SendError<EventAndParams>, EventU32> =
             EventManager::new(Box::new(event_man_receiver));
         let event_grp_0 = EventU32::new(Severity::INFO, 0, 0).unwrap();
         let event_grp_1_0 = EventU32::new(Severity::HIGH, 1, 0).unwrap();
@@ -224,7 +242,7 @@ mod tests {
 
         // Test event with one listener
         event_sender
-            .send(event_grp_0)
+            .send((event_grp_0, None))
             .expect("Sending single error failed");
         let res = event_man.try_event_handling();
         assert!(res.is_ok());
@@ -233,7 +251,7 @@ mod tests {
 
         // Test event which is sent to all group listeners
         event_sender
-            .send(event_grp_1_0)
+            .send((event_grp_1_0, None))
             .expect("Sending group error failed");
         let res = event_man.try_event_handling();
         assert!(res.is_ok());
@@ -248,7 +266,7 @@ mod tests {
         let event_man_receiver = EventReceiver {
             mpsc_receiver: manager_queue,
         };
-        let mut event_man: EventManager<SendError<EventU32>, EventU32> =
+        let mut event_man: EventManager<SendError<EventAndParams>, EventU32> =
             EventManager::new(Box::new(event_man_receiver));
         let res = event_man.try_event_handling();
         assert!(res.is_ok());
@@ -266,10 +284,10 @@ mod tests {
         event_man.subscribe_group(event_grp_1_0.group_id(), event_grp_0_and_1_listener);
 
         event_sender
-            .send(event_grp_0)
+            .send((event_grp_0, None))
             .expect("Sending Event Group 0 failed");
         event_sender
-            .send(event_grp_1_0)
+            .send((event_grp_1_0, None))
             .expect("Sendign Event Group 1 failed");
         let res = event_man.try_event_handling();
         assert!(res.is_ok());
@@ -290,7 +308,7 @@ mod tests {
         let event_man_receiver = EventReceiver {
             mpsc_receiver: manager_queue,
         };
-        let mut event_man: EventManager<SendError<EventU32>, EventU32> =
+        let mut event_man: EventManager<SendError<EventAndParams>, EventU32> =
             EventManager::new(Box::new(event_man_receiver));
         let event_0 = EventU32::new(Severity::INFO, 0, 5).unwrap();
         let event_1 = EventU32::new(Severity::HIGH, 1, 0).unwrap();
@@ -307,7 +325,7 @@ mod tests {
         event_man.subscribe_single(event_0, event_listener_0.clone());
         event_man.subscribe_single(event_0, event_listener_1);
         event_sender
-            .send(event_0)
+            .send((event_0, None))
             .expect("Triggering Event 0 failed");
         let res = event_man.try_event_handling();
         assert!(res.is_ok());
@@ -316,10 +334,10 @@ mod tests {
         check_next_event(event_0, &event_0_rx_1);
         event_man.subscribe_group(event_1.group_id(), event_listener_0.clone());
         event_sender
-            .send(event_0)
+            .send((event_0, None))
             .expect("Triggering Event 0 failed");
         event_sender
-            .send(event_1)
+            .send((event_1, None))
             .expect("Triggering Event 1 failed");
 
         // 3 Events messages will be sent now
@@ -336,7 +354,7 @@ mod tests {
         // Double insertion should be detected, result should remain the same
         event_man.subscribe_group(event_1.group_id(), event_listener_0);
         event_sender
-            .send(event_1)
+            .send((event_1, None))
             .expect("Triggering Event 1 failed");
         let res = event_man.try_event_handling();
         assert!(res.is_ok());