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#![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)
}
}
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