Line data    Source code

       1              : // Licensed under the Apache License, Version 2.0
       2              : // Copyright 2025, Michael Bushe, All rights reserved.
       3              : 
       4              : import 'package:dartastic_opentelemetry_api/dartastic_opentelemetry_api.dart';
       5              : import 'sampler.dart';
       6              : 
       7              : /// A sampler that always samples every trace.
       8              : ///
       9              : /// This sampler implements the "always on" sampling strategy, which means
      10              : /// it will record and sample every span regardless of any other factors.
      11              : /// This is useful for debugging and development environments where you
      12              : /// want to see all spans.
      13              : ///
      14              : /// More information:
      15              : /// https://opentelemetry.io/docs/specs/otel/trace/sdk/#alwayson
      16              : class AlwaysOnSampler implements Sampler {
      17              :   /// Gets a description of this sampler.
      18              :   ///
      19              :   /// @return The string "AlwaysOnSampler"
      20            2 :   @override
      21              :   String get description => 'AlwaysOnSampler';
      22              : 
      23              :   /// Creates a new AlwaysOnSampler.
      24           81 :   const AlwaysOnSampler();
      25              : 
      26              :   /// Always returns a decision to record and sample the span.
      27              :   ///
      28              :   /// This method ignores all parameters and always returns a decision
      29              :   /// to record and sample the span.
      30              :   ///
      31              :   /// @param parentContext Ignored
      32              :   /// @param traceId Ignored
      33              :   /// @param name Ignored
      34              :   /// @param spanKind Ignored
      35              :   /// @param attributes Ignored
      36              :   /// @param links Ignored
      37              :   /// @return A sampling result with decision set to recordAndSample
      38           30 :   @override
      39              :   SamplingResult shouldSample({
      40              :     required Context parentContext,
      41              :     required String traceId,
      42              :     required String name,
      43              :     required SpanKind spanKind,
      44              :     required Attributes? attributes,
      45              :     required List<SpanLink>? links,
      46              :   }) {
      47              :     return const SamplingResult(
      48              :       decision: SamplingDecision.recordAndSample,
      49              :       source: SamplingDecisionSource.tracerConfig,
      50              :     );
      51              :   }
      52              : }