fn json_stats()

in src/core/admin/src/lib.rs [496:527]

• 28 lines of code
• 6 McCabe index (conditional complexity)

    fn json_stats(&self) -> String {
        let head = "{".to_owned();

        let mut data = Vec::new();

        for metric in &rustcommon_metrics::metrics() {
            let any = match metric.as_any() {
                Some(any) => any,
                None => {
                    continue;
                }
            };

            if let Some(counter) = any.downcast_ref::<Counter>() {
                data.push(format!("\"{}\": {}", metric.name(), counter.value()));
            } else if let Some(gauge) = any.downcast_ref::<Gauge>() {
                data.push(format!("\"{}\": {}", metric.name(), gauge.value()));
            } else if let Some(heatmap) = any.downcast_ref::<Heatmap>() {
                for (label, value) in PERCENTILES {
                    let percentile = heatmap.percentile(*value).map(|b| b.high()).unwrap_or(0);
                    data.push(format!("\"{}_{}\": {}", metric.name(), label, percentile));
                }
            }
        }

        data.sort();
        let body = data.join(",");
        let mut content = head;
        content += &body;
        content += "}";
        content
    }