metriki-core 1.8.0

A metrics library ported from dropwizard metrics
Documentation 
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use std::sync::Arc;

use once_cell::sync::OnceCell;

use crate::registry::MetricsRegistry;

/// Provide access to built-in global instance of `MetricsRegistry`.
pub fn global_registry() -> Arc<MetricsRegistry> {
    static GLOBAL_REGISTRY: OnceCell<Arc<MetricsRegistry>> = OnceCell::new();

    GLOBAL_REGISTRY.get_or_init(MetricsRegistry::arc).clone()
}

#[cfg(test)]
mod test {
    use super::global_registry;

    #[test]
    fn test_global_registry() {
        let registry = global_registry();
        registry.meter("hello").mark();

        assert!(!registry.snapshots().is_empty());
    }
}