metrics-logger

metrics-logger is a crate for logging metrics. It aids development and testing by allowing developers to view metrics without setting up a network endpoint.

This is achieved by implementing the Recorder trait from the metrics crate.

Notes

• This crate exports the metrics crate to avoid version mismatches. The version of metrics-logger matches that of the metrics crate.
• MetricsLogger requires callbacks to avoid issues with different versions of the log or tracing crates in the user's project.

Example

use metrics_logger::{metrics, MetricsLogger, LogMode};

// MetricsLogger implements the Recorder trait
let recorder = MetricsLogger::new(
    LogMode::Periodic(10), // Logging interval in seconds
    |logs| println!("Metrics: {}", logs), // Logging callback
    |err| eprintln!("Error: {}", err),    // Error callback
);

// This tells the metrics crate to use your Recorder implementation.
metrics::set_global_recorder(recorder).unwrap();

Modules

• cmd: Handles commands for updating metrics.
• handles: Implements metric handles (e.g., counters, gauges, histograms).
• state: Manages metric state and generates logs.

Dependencies

This library re-exports the metrics crate to ensure compatibility with the same version used internally.