LCOV - code coverage report
Current view: top level - source/extensions/tracers/xray - sampling_strategy.h (source / functions) Hit Total Coverage
Test: coverage.dat Lines: 0 3 0.0 %
Date: 2024-01-05 06:35:25 Functions: 0 3 0.0 %

          Line data    Source code
       1             : #pragma once
       2             : 
       3             : #include <memory>
       4             : 
       5             : #include "envoy/common/pure.h"
       6             : #include "envoy/common/random_generator.h"
       7             : 
       8             : #include "source/common/common/macros.h"
       9             : 
      10             : #include "absl/strings/string_view.h"
      11             : 
      12             : namespace Envoy {
      13             : namespace Extensions {
      14             : namespace Tracers {
      15             : namespace XRay {
      16             : 
      17             : struct SamplingRequest {
      18             :   absl::string_view host_;
      19             :   absl::string_view http_method_;
      20             :   absl::string_view http_url_;
      21             : };
      22             : 
      23             : /**
      24             :  * Strategy provides an interface for implementing trace sampling strategies.
      25             :  */
      26             : class SamplingStrategy {
      27             : public:
      28           0 :   explicit SamplingStrategy(Random::RandomGenerator& rng) : rng_(rng) {}
      29           0 :   virtual ~SamplingStrategy() = default;
      30             : 
      31             :   /**
      32             :    * sampleRequest determines if the given request should be traced or not.
      33             :    * Implementation _must_ be thread-safe.
      34             :    */
      35             :   virtual bool shouldTrace(const SamplingRequest& sampling_request) PURE;
      36             : 
      37             : protected:
      38           0 :   uint64_t random() const { return rng_.random(); }
      39             : 
      40             : private:
      41             :   Random::RandomGenerator& rng_;
      42             : };
      43             : 
      44             : using SamplingStrategyPtr = std::unique_ptr<SamplingStrategy>;
      45             : 
      46             : } // namespace XRay
      47             : } // namespace Tracers
      48             : } // namespace Extensions
      49             : } // namespace Envoy

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