I DID THE THING

src/engine.rs

@@ -121,25 +121,15 @@ impl InputEngine for InputEngineUDP {
          self.last_socket = Some(std::net::UdpSocket::bind(addr).unwrap());
       }
 
-      let result = self._get();
-
+      let mut buf = [0; 128];
+      let result = self.last_socket.as_ref().unwrap().recv_from(&mut buf);
       if result.is_err() {
          self.last_socket = None;
          return Vec::<char>::new();
       }
-      return result.unwrap();
-   }
-}
-
-impl InputEngineUDP {
-   fn _get(&mut self) -> Result<Vec<char>, std::io::Error> {
-      let mut buf = [0; 128];
-      if !self.last_socket.is_some() {
-         return Ok(Vec::<char>::new());
-      }
-      let (amt, _) = self.last_socket.as_ref().unwrap().recv_from(&mut buf)?;
+      let (amt, _) = result.unwrap();
       let buf = &mut buf[..amt];
-      return Ok(std::str::from_utf8(buf).unwrap().chars().collect());
+      return std::str::from_utf8(buf).unwrap().chars().collect();
    }
 }
 
@@ -191,7 +181,7 @@ mod test_input {
 }
 
 pub trait OutputEngine {
-   fn put(&self, v: Vec<char>);
+   fn put(&mut self, v: Vec<char>);
 }
 
 pub fn build_output_engine(cfg: &Engine) -> Result<Box<dyn OutputEngine>, String> {
@@ -205,7 +195,7 @@ pub fn build_output_engine(cfg: &Engine) -> Result<Box<dyn OutputEngine>, String
 struct OutputEngineStdout {}
 
 impl OutputEngine for OutputEngineStdout {
-   fn put(&self, v: Vec<char>) {
+   fn put(&mut self, v: Vec<char>) {
       println!("{}", v.iter().cloned().collect::<String>());
    }
 }
@@ -216,22 +206,23 @@ mod test_output {
 
    struct OutputEngineTest {}
    impl OutputEngine for OutputEngineTest {
-      fn put(&self, _v: Vec<char>) {
+      fn put(&mut self, _v: Vec<char>) {
       }
    }
 
    #[test]
    fn test_output_engine_impl() {
-      let output_engine_test = OutputEngineTest{};
-      _test_output_engine_impl(&output_engine_test);
+      let mut output_engine_test = OutputEngineTest{};
+      _test_output_engine_impl(&mut output_engine_test);
    }
 
-   fn _test_output_engine_impl(engine: &dyn OutputEngine) {
+   fn _test_output_engine_impl(engine: &mut dyn OutputEngine) {
       engine.put("teehee".to_string().chars().collect());
    }
 }
 
 struct OutputEngineUDP {
+   last_socket: Option<std::net::UdpSocket>,
    host: String,
    port: i32,
 }
@@ -239,15 +230,29 @@ struct OutputEngineUDP {
 pub fn build_output_engine_udp(cfg: &Engine) -> Result<Box<dyn OutputEngine>, String> {
    let udp_cfg = cfg.udp.as_ref().unwrap();
    return Ok(Box::new(OutputEngineUDP{
+      last_socket: None,
       host: udp_cfg.host.clone().unwrap(),
       port: udp_cfg.port,
    }));
 }
 
 impl OutputEngine for OutputEngineUDP {
-   fn put(&self, v: Vec<char>) {
-      let socket = std::net::UdpSocket::bind("127.0.0.1:".to_string() + &(self.port+10).to_string()).unwrap();
-      socket.connect(self.host.to_string() + ":" + &self.port.to_string()).unwrap();
-      socket.send(&v.iter().cloned().collect::<String>().as_bytes()).unwrap();
+   fn put(&mut self, v: Vec<char>) {
+      if self.last_socket.is_none() {
+         let result = std::net::UdpSocket::bind("127.0.0.1:".to_string() + &(self.port+10).to_string());
+         if result.is_err() {
+            return;
+         }
+         self.last_socket = Some(result.unwrap());
+         if self.last_socket.as_ref().unwrap().connect(self.host.to_string() + ":" + &self.port.to_string()).is_err() {
+            self.last_socket = None;
+            return;
+         }
+      }
+
+      let result = self.last_socket.as_ref().unwrap().send(&v.iter().cloned().collect::<String>().as_bytes());
+      if result.is_err() {
+         self.last_socket = None;
+      }
    }
 }

src/main.rs

@@ -8,7 +8,7 @@ fn main() {
    println!("{:?} => {}", cfg.streams.input.engine.name, input_engine.is_ok());
    println!("{:?} => {}", cfg.streams.output.engine.name, output_engine.is_ok());
    let mut input_engine = input_engine.unwrap();
-   let output_engine = output_engine.unwrap();
+   let mut output_engine = output_engine.unwrap();
    loop {
       output_engine.put(input_engine.get());
    }