Line data    Source code

       1             : #pragma once
       2             : 
       3             : #include <memory>
       4             : 
       5             : #include "envoy/common/pure.h"
       6             : 
       7             : #include "absl/strings/string_view.h"
       8             : 
       9             : namespace Envoy {
      10             : namespace Server {
      11             : 
      12             : /**
      13             :  * A point within the connection or request lifecycle that provides context on
      14             :  * whether to shed load at that given stage for the current entity at the point.
      15             :  */
      16             : class LoadShedPoint {
      17             : public:
      18        1684 :   virtual ~LoadShedPoint() = default;
      19             : 
      20             :   // Whether to shed the load.
      21             :   virtual bool shouldShedLoad() PURE;
      22             : };
      23             : 
      24             : using LoadShedPointPtr = std::unique_ptr<LoadShedPoint>;
      25             : 
      26             : /**
      27             :  * Provides configured LoadShedPoints.
      28             :  */
      29             : class LoadShedPointProvider {
      30             : public:
      31        2345 :   virtual ~LoadShedPointProvider() = default;
      32             : 
      33             :   /**
      34             :    * Get the load shed point identified by the following string. Returns nullptr
      35             :    * for non-configured points.
      36             :    */
      37             :   virtual LoadShedPoint* getLoadShedPoint(absl::string_view point_name) PURE;
      38             : };
      39             : 
      40             : } // namespace Server
      41             : } // namespace Envoy