Module metrics 

Prometheus-compatible metrics exporter for observability.

This module provides metrics collection and export in Prometheus text format, allowing integration with Prometheus monitoring systems.

Features

• Counter, Gauge, and Histogram metric types
• Prometheus text format export
• Label support for multi-dimensional metrics
• Thread-safe metric updates
• Zero-cost when metrics are disabled

Example

use chie_core::metrics::{MetricsRegistry, Counter, Gauge};

let mut registry = MetricsRegistry::new();

// Register metrics
let requests = registry.counter("http_requests_total", "Total HTTP requests");
let storage_used = registry.gauge("storage_bytes_used", "Storage bytes used");

// Update metrics
requests.inc();
storage_used.set(1024.0);

// Export metrics
let output = registry.export();
println!("{}", output);

Structs

Counter

Counter metric.

Gauge

Gauge metric.

Histogram

Histogram metric (simplified).

MetricMetadata

Metric metadata.

MetricsRegistry

Metrics registry for collecting and exporting metrics.

Enums

MetricType

Metric type enumeration.

Functions

create_standard_registry

Create a standard metrics registry with common CHIE metrics.