kcenon::monitoring::degradable_service< T > Class Template Reference

Degradable service wrapper. More...

#include <graceful_degradation.h>

Collaboration diagram for kcenon::monitoring::degradable_service< T >:

Public Types
using	normal_operation = std::function<common::Result<T>()>
using	degraded_operation = std::function<common::Result<T>(degradation_level)>

Public Member Functions
	degradable_service (const std::string &name, std::shared_ptr< graceful_degradation_manager > manager, normal_operation normal_op, degraded_operation degraded_op)
common::Result< T >	execute ()
	Execute the service operation.
const std::string &	get_name () const
	Get service name.

Private Attributes
std::string	name_
std::shared_ptr< graceful_degradation_manager >	manager_
normal_operation	normal_op_
degraded_operation	degraded_op_

Detailed Description

template<typename T>
class kcenon::monitoring::degradable_service< T >

Degradable service wrapper.

Wraps a service with degradation support.

Definition at line 344 of file graceful_degradation.h.

Member Typedef Documentation

degraded_operation

template<typename T >

using kcenon::monitoring::degradable_service< T >::degraded_operation = std::function<common::Result<T>(degradation_level)>

Definition at line 347 of file graceful_degradation.h.

normal_operation

template<typename T >

using kcenon::monitoring::degradable_service< T >::normal_operation = std::function<common::Result<T>()>

Definition at line 346 of file graceful_degradation.h.

Constructor & Destructor Documentation

degradable_service()

template<typename T >

kcenon::monitoring::degradable_service< T >::degradable_service ( const std::string & name, std::shared_ptr< graceful_degradation_manager > manager, normal_operation normal_op, degraded_operation degraded_op )

inline

Definition at line 349 of file graceful_degradation.h.

        : name_(name)
        , manager_(std::move(manager))
        , normal_op_(std::move(normal_op))
        , degraded_op_(std::move(degraded_op)) {}

Member Function Documentation

execute()

template<typename T >

common::Result< T > kcenon::monitoring::degradable_service< T >::execute ( )

inline

Execute the service operation.

Definition at line 361 of file graceful_degradation.h.

                              {
        if (!manager_) {
            return normal_op_();
        }
 
        auto level = manager_->get_service_level(name_);
        if (level == degradation_level::normal) {
            return normal_op_();
        }
 
        if (degraded_op_) {
            return degraded_op_(level);
        }
 
        return common::Result<T>::err(error_info(monitoring_error_code::service_degraded, "Service is degraded and no fallback available").to_common_error());
    }

References kcenon::monitoring::degradable_service< T >::degraded_op_, kcenon::monitoring::degradable_service< T >::manager_, kcenon::monitoring::degradable_service< T >::name_, kcenon::monitoring::normal, kcenon::monitoring::degradable_service< T >::normal_op_, and kcenon::monitoring::service_degraded.

get_name()

template<typename T >

const std::string & kcenon::monitoring::degradable_service< T >::get_name ( ) const

inline

Get service name.

Definition at line 381 of file graceful_degradation.h.

                                      {
        return name_;
    }

References kcenon::monitoring::degradable_service< T >::name_.

Member Data Documentation

degraded_op_

template<typename T >

degraded_operation kcenon::monitoring::degradable_service< T >::degraded_op_

private

Definition at line 389 of file graceful_degradation.h.

Referenced by kcenon::monitoring::degradable_service< T >::execute().

manager_

template<typename T >

std::shared_ptr<graceful_degradation_manager> kcenon::monitoring::degradable_service< T >::manager_

private

Definition at line 387 of file graceful_degradation.h.

Referenced by kcenon::monitoring::degradable_service< T >::execute().

name_

template<typename T >

std::string kcenon::monitoring::degradable_service< T >::name_

private

Definition at line 386 of file graceful_degradation.h.

Referenced by kcenon::monitoring::degradable_service< T >::execute(), and kcenon::monitoring::degradable_service< T >::get_name().

normal_op_

template<typename T >

normal_operation kcenon::monitoring::degradable_service< T >::normal_op_

private

Definition at line 388 of file graceful_degradation.h.

Referenced by kcenon::monitoring::degradable_service< T >::execute().

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

• include/kcenon/monitoring/reliability/graceful_degradation.h