unreliable_service Class Reference

Collaboration diagram for unreliable_service:

Public Member Functions
	unreliable_service (double failure_rate)
kcenon::common::Result< std::string >	call ()
void	set_failure_rate (double rate)

Private Attributes
std::mt19937	rng_
std::uniform_real_distribution	dist_
double	failure_rate_
std::atomic< int >	call_count_ {0}

Detailed Description

Examples

graceful_degradation_example.cpp.

Definition at line 35 of file graceful_degradation_example.cpp.

Constructor & Destructor Documentation

unreliable_service()

unreliable_service::unreliable_service ( double failure_rate )

inlineexplicit

Examples

graceful_degradation_example.cpp.

Definition at line 43 of file graceful_degradation_example.cpp.

        : rng_(std::random_device{}())
        , dist_(0.0, 1.0)
        , failure_rate_(failure_rate) {}

Member Function Documentation

call()

kcenon::common::Result< std::string > unreliable_service::call ( )

inline

Examples

graceful_degradation_example.cpp.

Definition at line 48 of file graceful_degradation_example.cpp.

                                         {
        call_count_++;
        std::this_thread::sleep_for(50ms);
 
        if (dist_(rng_) < failure_rate_) {
            return kcenon::common::Result<std::string>::err(
                error_info{monitoring_error_code::service_unavailable,
                          "Service temporarily unavailable"}.to_common_error()
            );
        }
 
        return kcenon::common::ok(std::string("Service response: SUCCESS"));
    }

References call_count_, dist_, failure_rate_, rng_, and kcenon::monitoring::error_info::to_common_error().

Referenced by demonstrate_combined_patterns().

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set_failure_rate()

void unreliable_service::set_failure_rate ( double rate )

inline

Examples

graceful_degradation_example.cpp.

Definition at line 62 of file graceful_degradation_example.cpp.

                                       {
        failure_rate_ = rate;
    }

References failure_rate_.

Member Data Documentation

call_count_

std::atomic<int> unreliable_service::call_count_ {0}

private

Examples

graceful_degradation_example.cpp.

Definition at line 40 of file graceful_degradation_example.cpp.

{0};

Referenced by call().

dist_

std::uniform_real_distribution unreliable_service::dist_

private

Examples

graceful_degradation_example.cpp.

Definition at line 38 of file graceful_degradation_example.cpp.

Referenced by call().

failure_rate_

double unreliable_service::failure_rate_

private

Examples

graceful_degradation_example.cpp.

Definition at line 39 of file graceful_degradation_example.cpp.

Referenced by call(), and set_failure_rate().

rng_

std::mt19937 unreliable_service::rng_

private

Examples

graceful_degradation_example.cpp.

Definition at line 37 of file graceful_degradation_example.cpp.

Referenced by call().

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The documentation for this class was generated from the following file:

• examples/graceful_degradation_example.cpp