diagnostics library

Provides metrics and instrumentation support for application telemetry.

This library contains the default implementation of meter factory and extension methods for registering metrics providers with dependency injection, inspired by Microsoft.Extensions.Diagnostics.

Metrics Collection

Create and use meters for collecting application metrics:

final meterFactory = provider.getRequiredService<MeterFactory>();
final meter = meterFactory.create('MyApp.Metrics');

// Create a counter
final requestCounter = meter.createCounter<int>('requests');
requestCounter.add(1);

// Create a histogram
final latencyHistogram = meter.createHistogram<double>('latency');
latencyHistogram.record(42.5);

Metrics Listeners

Subscribe to metrics via listeners:

services.addMetrics(builder => builder
  .addListener<MyMetricsListener>());