Conflicting implementation for models

[hyousef]

I'm trying the ws, and would like to split the Handler trait implementation into multiple files, so I wrote the below:

on_open.rs:

impl Handler for Client {
    fn on_open(&mut self, _: Handshake) -> Result<()> {
        println!("Socket opened");
        Ok(())
    }
}

And in another file, on_message.rs:

impl Handler for Client {
    fn on_message(&mut self, msg: Message) -> Result<()> {
        println!("Server got message '{}'. ", msg);
        Ok(())
    }
}

While compiling I got the below error:

error[E0119]: conflicting implementations of trait `ws::handler::Handler` for type `models::client::Client`:
 --> src\sockets\on_message.rs:9:1
  |
9 | impl Handler for Client {
  | ^^^^^^^^^^^^^^^^^^^^^^^ conflicting implementation for `models::client::Client`
  |
 ::: src\sockets\on_open.rs:8:1
  |
8 | impl Handler for Client {
  | ----------------------- first implementation here

I want the files to be separated so that each developer work on a separate one, is there a way to make it, or I'm forced to have the full train implementation into single file?

[jonh]

I wouldn't recommend splitting but could use include!. It's bad for adding functionality since everything would need to be nested in the one function.

[kornel]

You can't split trait implementation. The best you can do is to delegate to a non-trait method:

impl Handler for Client {
fn on_open(&mut self, _: Handshake) -> Result<()> {
   self.actual_on_open()
}
fn on_message(&mut self, msg: Message) -> Result<()> {
   self.actual_on_message(msg)
}
}

and somewhere else:

impl Client { // NOT handler
   fn actual_on_open(&mut self, etc…) {etc…}
}

[hyousef]

Thanks, my app structure is as shown, and it worked by calling mod sockets; which is the content of the actual sockets implementation.
I added the mod sockets; in the main.rs, in the same main.rs I added mod socket; to connect the handler, can not I call the mod sockets; in the socket.rs itself instead of doing so from the main.rs

hope my long statement is clear