threatflux-cache 0.1.8

//! Metrics module for ThreatFlux Cache
//!
//! Provides Prometheus metrics integration for monitoring cache performance.

use std::collections::HashMap;
use std::sync::Arc;

/// Cache metrics collector
#[allow(clippy::type_complexity)]
pub struct CacheMetrics {
    // Placeholder implementation - would integrate with prometheus crate when feature is enabled
    counters: Arc<std::sync::RwLock<HashMap<String, u64>>>,
}

impl CacheMetrics {
    /// Create new metrics collector
    pub fn new() -> Self {
        Self {
            counters: Arc::new(std::sync::RwLock::new(HashMap::new())),
        }
    }

    /// Increment a counter metric
    pub fn increment_counter(&self, name: &str) {
        if let Ok(mut counters) = self.counters.write() {
            *counters.entry(name.to_string()).or_insert(0) += 1;
        }
    }

    /// Record cache hit
    pub fn record_hit(&self) {
        self.increment_counter("cache_hits_total");
    }

    /// Record cache miss
    pub fn record_miss(&self) {
        self.increment_counter("cache_misses_total");
    }

    /// Record cache eviction
    pub fn record_eviction(&self) {
        self.increment_counter("cache_evictions_total");
    }

    /// Get current metrics
    pub fn get_metrics(&self) -> HashMap<String, u64> {
        self.counters.read().unwrap().clone()
    }
}

impl Default for CacheMetrics {
    fn default() -> Self {
        Self::new()
    }
}