| #![warn(unsafe_op_in_unsafe_fn)] |
|
|
| use dora_operator_api::{ |
| register_operator, DoraOperator, DoraOutputSender, DoraStatus, Event, IntoArrow, |
| }; |
|
|
| register_operator!(ExampleOperator); |
|
|
| #[derive(Debug, Default)] |
| struct ExampleOperator { |
| ticks: usize, |
| } |
|
|
| impl DoraOperator for ExampleOperator { |
| fn on_event( |
| &mut self, |
| event: &Event, |
| output_sender: &mut DoraOutputSender, |
| ) -> Result<DoraStatus, String> { |
| match event { |
| Event::Input { id, data } => match *id { |
| "tick" => { |
| self.ticks += 1; |
| } |
| "random" => { |
| let data = u64::try_from(data) |
| .map_err(|err| format!("expected u64 message: {err}"))?; |
|
|
| let output = format!( |
| "operator received random value {data:#x} after {} ticks", |
| self.ticks |
| ); |
| output_sender.send("status".into(), output.into_arrow())?; |
| } |
| other => eprintln!("ignoring unexpected input {other}"), |
| }, |
| Event::Stop => {} |
| Event::InputClosed { id } => { |
| println!("input `{id}` was closed"); |
| if *id == "random" { |
| println!("`random` input was closed -> exiting"); |
| return Ok(DoraStatus::Stop); |
| } |
| } |
| other => { |
| println!("received unknown event {other:?}"); |
| } |
| } |
|
|
| Ok(DoraStatus::Continue) |
| } |
| } |
|
|
