make it (theoretically) possible to reconfigure a module. Might have some sort of file watcher thread which periodically checks to see if config file has been modified and reconfigures if necessary.

src/lib.rs

@@ -71,6 +71,14 @@ impl Tenquestionmarks {
         Result::Ok(Tenquestionmarks::with_modules(modules))
     }
 
+    pub fn reconfigure (&mut self, configuration: &Table) {
+        for (key, module_configuration) in configuration {
+            if let (Some(module_configuration_table), Some(ref mut module)) = (module_configuration.as_table(), self.modules.get_mut(key)) {
+                module.reconfigure(module_configuration_table.clone());
+            }
+        }
+    }
+
     pub fn run (&self) {
         crossbeam::scope(|scope| {
             let mut dispatchers: BTreeMap<&str, Receiver<Envelope>> = BTreeMap::new();

src/modules/mod.rs

@@ -29,6 +29,11 @@ impl Module {
         self.event_loop.run(sender, receiver);
     }
 
+    pub fn reconfigure (&mut self, configuration: Table) {
+        self.event_loop.reconfigure(&configuration);
+        self.config = configuration;
+    }
+
     pub fn parents (&self) -> Vec<String> {
         self.config.get("parents")
                    .and_then(|value| value.as_array())
@@ -56,4 +61,5 @@ impl Module {
 
 pub trait EventLoop : Sync {
     fn run (&self, _: Box<ExtSender<Event>>, _: Receiver<Arc<Envelope>>) {}
+    fn reconfigure (&mut self, _: &Table) {}
 }

src/modules/random.rs

@@ -18,31 +18,40 @@ pub struct RandomModule {
 
 impl RandomModule {
     pub fn new (_: &Table, configuration: &Table) -> Box<EventLoop> {
-        let pattern = configuration.get("pattern")
+        Box::new(RandomModule {
+            pattern: RandomModule::pattern_from_config(&configuration),
+            responses: RandomModule::responses_from_config(&configuration)
+        })
+    }
+
+    fn pattern_from_config (configuration: &Table) -> Regex {
+        configuration.get("pattern")
                      .and_then(|value| value.as_str())
                      .map(String::from)
                      .or_else(|| configuration.get("prefix")
                                                .and_then(|value| value.as_str())
                                                .map(|value| format!("^{}", regex::escape(value))))
                      .and_then(|value| Regex::new(&value).ok())
-                                   .expect("Invalid value for pattern");
+                     .expect("Invalid value for pattern")
+    }
 
-        let responses = configuration.get("responses")
+    fn responses_from_config (configuration: &Table) -> Vec<String> {
+        configuration.get("responses")
                      .and_then(|value| value.as_array())
                      .map(|value| value.to_vec())
                      .unwrap_or(vec![])
                      .into_iter()
                      .map(|value| { String::from(value.as_str().unwrap()) })
-                                     .collect();
-
-        Box::new(RandomModule {
-            pattern: pattern,
-            responses: responses
-        })
+                     .collect()
     }
 }
 
 impl EventLoop for RandomModule {
+    fn reconfigure (&mut self, configuration: &Table) {
+        self.pattern = RandomModule::pattern_from_config(&configuration);
+        self.responses = RandomModule::responses_from_config(&configuration)
+    }
+
     fn run (&self, _: Box<ExtSender<Event>>, receiver: Receiver<Arc<Envelope>>) {
         let mut rng = rand::thread_rng();