add register_handler to Client

src/client.rs

@@ -11,7 +11,7 @@ use sasl::common::{Credentials as SaslCredentials, Identity, Secret, ChannelBind
 use sasl::common::scram::{Sha1, Sha256};
 use components::sasl_error::SaslError;
 use util::FromElement;
-use event::{Dispatcher, Propagation, SendElement, ReceiveElement, Priority};
+use event::{Event, Dispatcher, Propagation, SendElement, ReceiveElement, Priority};
 
 use base64;
 
@@ -128,6 +128,13 @@ impl Client {
         }
     }
 
+    pub fn register_handler<E, F>(&mut self, pri: Priority, func: F)
+        where
+            E: Event,
+            F: Fn(&E) -> Propagation + 'static {
+        self.dispatcher.lock().unwrap().register(pri, func);
+    }
+
     /// Returns the plugin given by the type parameter, if it exists, else panics.
     pub fn plugin<P: Plugin>(&self) -> &P {
         self.plugins.get(&TypeId::of::<P>())