ugrpc::server::middlewares::deadline_propagation::Middleware Class Reference

Detailed Description

Definition at line 13 of file middleware.hpp.

Inheritance diagram for ugrpc::server::middlewares::deadline_propagation::Middleware:

Public Member Functions
void	OnCallStart (MiddlewareCallContext &context) const override
	This hook is invoked once per Call (RPC), after the message metadata is received, but before the handler function is called.
void	PreSendStatus (MiddlewareCallContext &context, grpc::Status &status) const override
	The function is invoked before sending the final status of the call.
virtual void	PostRecvMessage (MiddlewareCallContext &context, google::protobuf::Message &request) const
	The function is invoked after each received message.
virtual void	PreSendMessage (MiddlewareCallContext &context, google::protobuf::Message &response) const
	The function is invoked before each sended message.
virtual void	OnCallFinish (MiddlewareCallContext &context, const std::optional< grpc::Status > &status) const
	This hook is invoked once per Call (RPC), after the handler function has finished execution and the final status is determined.

Static Public Attributes
static constexpr std::string_view	kName = "grpc-server-deadline-propagation"
	The default name of.
static const auto	kDependency
	dependency of this middleware

Member Function Documentation

OnCallFinish()

virtual void ugrpc::server::MiddlewareBase::OnCallFinish ( MiddlewareCallContext &  context, const std::optional< grpc::Status > &  status  ) const

virtualinherited

This hook is invoked once per Call (RPC), after the handler function has finished execution and the final status is determined.

OnCallFinish is called exactly once per Call (RPC), regardless of whether the call succeeded or failed. It's the final middleware hook in the call chain. This is useful for cleanup operations, logging, or metrics collection that should happen after the RPC is completely processed.

Parameters

context	The middleware call context containing call information
status	The final status of the call, if available

OnCallStart()

void ugrpc::server::middlewares::deadline_propagation::Middleware::OnCallStart ( MiddlewareCallContext &  context ) const

overridevirtual

This hook is invoked once per Call (RPC), after the message metadata is received, but before the handler function is called.

If all OnCallStart succeeded => OnCallFinish will invoked after a success method call.

Reimplemented from ugrpc::server::MiddlewareBase.

PostRecvMessage()

virtual void ugrpc::server::MiddlewareBase::PostRecvMessage ( MiddlewareCallContext &  context, google::protobuf::Message &  request  ) const

virtualinherited

The function is invoked after each received message.

PostRecvMessage is called:

• unary: exactly once per Call (RPC)
• stream: 0, 1 or more times

Reimplemented in grpc_protovalidate::server::Middleware.

PreSendMessage()

virtual void ugrpc::server::MiddlewareBase::PreSendMessage ( MiddlewareCallContext &  context, google::protobuf::Message &  response  ) const

virtualinherited

The function is invoked before each sended message.

PreSendMessage is called:

• unary: 0 or 1 per Call (RPC), depending on whether the RPC returns a response or a failed status
• stream: once per response message, that is, 0, 1, more times per Call (RPC).

PreSendStatus()

void ugrpc::server::middlewares::deadline_propagation::Middleware::PreSendStatus ( MiddlewareCallContext &  context, grpc::Status &  status  ) const

overridevirtual

The function is invoked before sending the final status of the call.

PreSendStatus is called exactly once per Call (RPC), right before sending the final gRPC status to the client. This allows middlewares to inspect and potentially modify the status that will be sent to the client.

Reimplemented from ugrpc::server::MiddlewareBase.

Member Data Documentation

kDependency

const auto ugrpc::server::middlewares::deadline_propagation::Middleware::kDependency

inlinestatic

Initial value:

=
        ::middlewares::MiddlewareDependencyBuilder()
            .InGroup<::middlewares::groups::Core>()
            .After<congestion_control::Component>(::middlewares::DependencyType::kWeak)

dependency of this middleware

Definition at line 21 of file middleware.hpp.

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

• userver/ugrpc/server/middlewares/deadline_propagation/middleware.hpp