congestion_control::Component Class Reference

#include <userver/congestion_control/component.hpp>

Detailed Description

Component to limit too active requests, also known as CC.

congestion_control::Component Dynamic config

• USERVER_RPS_CCONTROL
• USERVER_RPS_CCONTROL_ENABLED

Static options:

Name	Description	Default value
fake-mode	if set, an actual throttling is skipped, but FSM is still working and producing informational logs	false
min-cpu	force fake-mode if the current cpu number is less than the specified value	1
only-rtc	if set to true and hostinfo::IsInRtc() returns false then forces the fake-mode	true
status-code	HTTP status code for ratelimited responses	429

Static configuration example:

# yaml
    congestion-control:
        fake-mode: true
        min-cpu: 2
        only-rtc: false
        # Uncomment if you want to change status code for ratelimited responses
        # status-code: 503
 
        # Common component options
        load-enabled: true

Examples

grpc-generic-proxy/main.cpp, and samples/grpc_middleware_service/main.cpp.

Definition at line 41 of file component.hpp.

Inheritance diagram for congestion_control::Component:

Public Member Functions
	Component (const components::ComponentConfig &, const components::ComponentContext &)
server::congestion_control::Limiter &	GetServerLimiter ()
server::congestion_control::Sensor &	GetServerSensor ()
ComponentHealth	GetComponentHealth () const override
void	OnLoadingCancelled () override

Static Public Member Functions
static yaml_config::Schema	GetStaticConfigSchema ()

Static Public Attributes
static constexpr std::string_view	kName = "congestion-control"
	The default name of congestion_control::Component component.

Protected Types
using	LoggableComponentBase = ComponentBase

Member Typedef Documentation

LoggableComponentBase

using components::ComponentBase::LoggableComponentBase = ComponentBase

protectedinherited

Deprecated

use components::ComponentBase instead.

Definition at line 67 of file component_base.hpp.

Member Function Documentation

GetComponentHealth()

ComponentHealth components::ComponentBase::GetComponentHealth ( ) const

inlineoverridevirtualinherited

Override this function to inform the world of the state of your component.

Warning

The function is called concurrently from multiple threads.

Reimplemented from components::RawComponentBase.

Reimplemented in server::handlers::Restart.

Definition at line 35 of file component_base.hpp.

OnLoadingCancelled()

void components::ComponentBase::OnLoadingCancelled ( )

inlineoverridevirtualinherited

Called once if the creation of any other component failed. If the current component expects some other component to take any action with the current component, this call is a signal that such action may never happen due to components loading was cancelled. Application components might not want to override it.

Reimplemented from components::RawComponentBase.

Definition at line 42 of file component_base.hpp.

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

• userver/congestion_control/component.hpp