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rust-opensmtpd/opensmtpd/examples/session_event_counter.rs

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use env_logger::{Builder, Env};
use log::info;
use opensmtpd::{event, handlers, Entry, SmtpIn};
#[derive(Clone, Default)]
struct MyContext {
nb: usize,
}
#[event(Any)]
fn on_event(ctx: &mut MyContext, entry: &Entry) {
ctx.nb += 1;
info!("Event received: {}, {}", entry.session_id, ctx.nb);
}
fn main() {
Builder::from_env(Env::default().default_filter_or("debug")).init();
SmtpIn::new().event_handlers(handlers!(on_event)).run();
}