reminder-bot/src/metrics.rs

use lazy_static::lazy_static;
use prometheus::{IntCounterVec, Opts, Registry};

lazy_static! {
    pub static ref REGISTRY: Registry = Registry::new();
    pub static ref REQUEST_COUNTER: IntCounterVec =
        IntCounterVec::new(Opts::new("requests", "Web requests"), &["method", "status", "route"])
            .unwrap();
    pub static ref REMINDER_COUNTER: IntCounterVec =
        IntCounterVec::new(Opts::new("reminders_sent", "Reminders sent"), &["id", "channel"])
            .unwrap();
    pub static ref REMINDER_FAIL_COUNTER: IntCounterVec = IntCounterVec::new(
        Opts::new("reminders_failed", "Reminders failed"),
        &["id", "channel", "error"]
    )
    .unwrap();
    pub static ref COMMAND_COUNTER: IntCounterVec =
        IntCounterVec::new(Opts::new("commands", "Commands used"), &["command"]).unwrap();
}

pub fn init_metrics() {
    REGISTRY.register(Box::new(REQUEST_COUNTER.clone())).unwrap();
    REGISTRY.register(Box::new(REMINDER_COUNTER.clone())).unwrap();
    REGISTRY.register(Box::new(REMINDER_FAIL_COUNTER.clone())).unwrap();
    REGISTRY.register(Box::new(COMMAND_COUNTER.clone())).unwrap();
}