userver: ugrpc::client::ClientFactoryComponent Class Reference
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ugrpc::client::ClientFactoryComponent Class Referencefinal

#include <userver/ugrpc/client/client_factory_component.hpp>

Detailed Description

Provides a ClientFactory in the component system.

Multiple ClientFactoryComponent instances may be created if different parameters are required for different clients.

Requires ugrpc::client::CommonComponent.

Authentication

Authentication is controlled by auth-type static config field. Possible values:

  • insecure (InsecureChannelCredentials - default)
  • ssl (SslCredentials)

Default (system) authentication keys are used regardless of the chosen auth-type.

Service config

As per https://github.com/grpc/grpc/blob/master/doc/service_config.md service config should be distributed via the name resolution process. We allow setting default service_config: pass desired JSON literal to default-service-config parameter

Static options of ugrpc::client::ClientFactoryComponent :

Name Description Default value
auth-type An optional authentication method. Possible values: insecure, ssl. insecure
ssl-credentials-options SSL options for cases when auth-type is ssl. {}
ssl-credentials-options.pem-root-certs The path to file containing the PEM encoding of the server root certificates. absent
ssl-credentials-options.pem-private-key The path to file containing the PEM encoding of the client's private key. absent
ssl-credentials-options.pem-cert-chain The path to file containing the PEM encoding of the client's certificate chain. absent
retry-config Retry configuration for outgoing RPCs. {}
retry-config.attempts The maximum number of RPC attempts, including the original attempt. 1
channel-args.* A map of channel arguments, see gRPC Core docs. Each of the elements: value of channel argument, must be a string or an integer. {}
default-service-config Default value for gRPC service config. See https://github.com/grpc/grpc/blob/master/doc/service_config.md This value is used if the name resolution process can't get value from DNS. absent
channel-count Number of channels created for each endpoint. 1

Options inherited from middlewares::RunnerComponentBase :

Name Description Default value
disable-user-pipeline-middlewares Flag to disable groups::User middlewares from pipeline. false
disable-all-pipeline-middlewares Flag to disable all middlewares from pipeline. false
middlewares.*.enabled Enable middleware in the list.
middlewares.*.* A middleware config.

Options inherited from components::ComponentBase :

Name Description Default value
load-enabled Set to false to disable loading of the component. true

The default component name for static config is "grpc-client-factory".

See also
https://grpc.github.io/grpc/core/group__grpc__arg__keys.html
Examples
grpc-generic-proxy/main.cpp, samples/grpc_middleware_service/main.cpp, and samples/grpc_service/main.cpp.

Definition at line 58 of file client_factory_component.hpp.

+ Inheritance diagram for ugrpc::client::ClientFactoryComponent:

Public Member Functions

 ClientFactoryComponent (const components::ComponentConfig &config, const components::ComponentContext &context)
 
ClientFactoryGetFactory ()
 
ComponentHealth GetComponentHealth () const override
 
void OnLoadingCancelled () override
 
void OnAllComponentsLoaded () override
 
void OnAllComponentsAreStopping () override
 

Static Public Member Functions

static yaml_config::Schema GetStaticConfigSchema ()
 

Static Public Attributes

static constexpr std::string_view kName = "grpc-client-factory"
 The default name of ugrpc::client::middlewares::log::Component.
 

Protected Types

using MiddlewareFactory
 
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.

◆ MiddlewareFactory

using middlewares::RunnerComponentBase< MiddlewareBase, ClientInfo >::MiddlewareFactory
protectedinherited

Definition at line 139 of file runner.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.

◆ OnAllComponentsAreStopping()

void components::ComponentBase::OnAllComponentsAreStopping ( )
inlineoverridevirtualinherited

Component may use this function to stop doing work before the stop of the components that depend on it.

Base components may override it and make final to do some work before the derived object constructor is called. Don't use it otherwise.

Reimplemented from components::RawComponentBase.

Reimplemented in components::Server, and urabbitmq::ConsumerComponentBase.

Definition at line 58 of file component_base.hpp.

◆ OnAllComponentsLoaded()

void components::ComponentBase::OnAllComponentsLoaded ( )
inlineoverridevirtualinherited

Component may use this function to finalize registration of other components that depend on it (for example, handler components register in server component, and the latter uses OnAllComponentsLoaded() to start processing requests).

Base components may override it and make final to do some work after the derived object constructor is called. Don't use it otherwise.

Reimplemented from components::RawComponentBase.

Reimplemented in components::Server, server::handlers::Ping, and urabbitmq::ConsumerComponentBase.

Definition at line 51 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.


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