GRPC C++  1.24.0
Public Member Functions | Friends
grpc_impl::ServerContext Class Reference

A ServerContext allows the person implementing a service handler to: More...

#include <server_context_impl.h>

Public Member Functions

 ServerContext ()
 
 ~ServerContext ()
 
std::chrono::system_clock::time_point deadline () const
 Return the deadline for the server call. More...
 
gpr_timespec raw_deadline () const
 Return a gpr_timespec representation of the server call's deadline. More...
 
void AddInitialMetadata (const grpc::string &key, const grpc::string &value)
 Add the (key, value) pair to the initial metadata associated with a server call. More...
 
void AddTrailingMetadata (const grpc::string &key, const grpc::string &value)
 Add the (key, value) pair to the initial metadata associated with a server call. More...
 
bool IsCancelled () const
 IsCancelled is always safe to call when using sync or callback API. More...
 
void TryCancel () const
 Cancel the Call from the server. More...
 
const std::multimap< grpc::string_ref, grpc::string_ref > & client_metadata () const
 Return a collection of initial metadata key-value pairs sent from the client. More...
 
grpc_compression_level compression_level () const
 Return the compression algorithm to be used by the server call. More...
 
void set_compression_level (grpc_compression_level level)
 Set level to be the compression level used for the server call. More...
 
bool compression_level_set () const
 Return a bool indicating whether the compression level for this call has been set (either implicitly or through a previous call to set_compression_level. More...
 
grpc_compression_algorithm compression_algorithm () const
 Return the compression algorithm the server call will request be used. More...
 
void set_compression_algorithm (grpc_compression_algorithm algorithm)
 Set algorithm to be the compression algorithm used for the server call. More...
 
void SetLoadReportingCosts (const std::vector< grpc::string > &cost_data)
 Set the serialized load reporting costs in cost_data for the call. More...
 
std::shared_ptr< const ::grpc::AuthContextauth_context () const
 Return the authentication context for this server call. More...
 
grpc::string peer () const
 Return the peer uri in a string. More...
 
const struct census_context * census_context () const
 Get the census context associated with this server call. More...
 
void AsyncNotifyWhenDone (void *tag)
 Async only. More...
 
grpc_callc_call ()
 Should be used for framework-level extensions only. More...
 

Friends

class ::grpc::testing::InteropServerContextInspector
 
class ::grpc::testing::ServerContextTestSpouse
 
class ::grpc::ServerInterface
 
class ::grpc_impl::Server
 
template<class W , class R >
class ::grpc_impl::ServerAsyncReader
 
template<class W >
class ::grpc_impl::ServerAsyncWriter
 
template<class W >
class ::grpc_impl::ServerAsyncResponseWriter
 
template<class W , class R >
class ::grpc_impl::ServerAsyncReaderWriter
 
template<class R >
class ::grpc_impl::ServerReader
 
template<class W >
class ::grpc_impl::ServerWriter
 
template<class W , class R >
class ::grpc_impl::internal::ServerReaderWriterBody
 
template<class ServiceType , class RequestType , class ResponseType >
class ::grpc::internal::RpcMethodHandler
 
template<class ServiceType , class RequestType , class ResponseType >
class ::grpc::internal::ClientStreamingHandler
 
template<class ServiceType , class RequestType , class ResponseType >
class ::grpc::internal::ServerStreamingHandler
 
template<class Streamer , bool WriteNeeded>
class ::grpc::internal::TemplatedBidiStreamingHandler
 
template<class RequestType , class ResponseType >
class ::grpc_impl::internal::CallbackUnaryHandler
 
template<class RequestType , class ResponseType >
class ::grpc_impl::internal::CallbackClientStreamingHandler
 
template<class RequestType , class ResponseType >
class ::grpc_impl::internal::CallbackServerStreamingHandler
 
template<class RequestType , class ResponseType >
class ::grpc_impl::internal::CallbackBidiHandler
 
template<::grpc::StatusCode code>
class ::grpc::internal::ErrorMethodHandler
 
class ::grpc_impl::ClientContext
 
class ::grpc::GenericServerContext
 

Detailed Description

A ServerContext allows the person implementing a service handler to:

Context settings are only relevant to the call handler they are supplied to, that is to say, they aren't sticky across multiple calls. Some of these settings, such as the compression options, can be made persistent at server construction time by specifying the appropriate ChannelArguments to a grpc::ServerBuilder, via ServerBuilder::AddChannelArgument.

Warning
ServerContext instances should not be reused across rpcs.

Constructor & Destructor Documentation

◆ ServerContext()

grpc_impl::ServerContext::ServerContext ( )

◆ ~ServerContext()

grpc_impl::ServerContext::~ServerContext ( )

Member Function Documentation

◆ AddInitialMetadata()

void grpc_impl::ServerContext::AddInitialMetadata ( const grpc::string key,
const grpc::string value 
)

Add the (key, value) pair to the initial metadata associated with a server call.

These are made available at the client side by the grpc::ClientContext::GetServerInitialMetadata() method.

Warning
This method should only be called before sending initial metadata to the client (which can happen explicitly, or implicitly when sending a a response message or status to the client).
Parameters
keyThe metadata key. If value is binary data, it must end in "-bin".
valueThe metadata value. If its value is binary, the key name must end in "-bin".

Metadata must conform to the following format: Custom-Metadata -> Binary-Header / ASCII-Header Binary-Header -> {Header-Name "-bin" } {binary value} ASCII-Header -> Header-Name ASCII-Value Header-Name -> 1*( x30-39 / x61-7A / "_" / "-" / ".") ; 0-9 a-z _ - . ASCII-Value -> 1*( x20-x7E ) ; space and printable ASCII

◆ AddTrailingMetadata()

void grpc_impl::ServerContext::AddTrailingMetadata ( const grpc::string key,
const grpc::string value 
)

Add the (key, value) pair to the initial metadata associated with a server call.

These are made available at the client side by the grpc::ClientContext::GetServerTrailingMetadata() method.

Warning
This method should only be called before sending trailing metadata to the client (which happens when the call is finished and a status is sent to the client).
Parameters
keyThe metadata key. If value is binary data, it must end in "-bin".
valueThe metadata value. If its value is binary, the key name must end in "-bin".

Metadata must conform to the following format: Custom-Metadata -> Binary-Header / ASCII-Header Binary-Header -> {Header-Name "-bin" } {binary value} ASCII-Header -> Header-Name ASCII-Value Header-Name -> 1*( x30-39 / x61-7A / "_" / "-" / ".") ; 0-9 a-z _ - . ASCII-Value -> 1*( x20-x7E ) ; space and printable ASCII

◆ AsyncNotifyWhenDone()

void grpc_impl::ServerContext::AsyncNotifyWhenDone ( void *  tag)
inline

Async only.

Has to be called before the rpc starts. Returns the tag in completion queue when the rpc finishes. IsCancelled() can then be called to check whether the rpc was cancelled. TODO(vjpai): Fix this so that the tag is returned even if the call never starts (https://github.com/grpc/grpc/issues/10136).

◆ auth_context()

std::shared_ptr<const ::grpc::AuthContext> grpc_impl::ServerContext::auth_context ( ) const
inline

Return the authentication context for this server call.

See also
grpc::AuthContext.

◆ c_call()

grpc_call* grpc_impl::ServerContext::c_call ( )
inline

Should be used for framework-level extensions only.

Applications never need to call this method.

◆ census_context()

const struct census_context* grpc_impl::ServerContext::census_context ( ) const

Get the census context associated with this server call.

◆ client_metadata()

const std::multimap<grpc::string_ref, grpc::string_ref>& grpc_impl::ServerContext::client_metadata ( ) const
inline

Return a collection of initial metadata key-value pairs sent from the client.

Note that keys may happen more than once (ie, a std::multimap is returned).

It is safe to use this method after initial metadata has been received, Calls always begin with the client sending initial metadata, so this is safe to access as soon as the call has begun on the server side.

Returns
A multimap of initial metadata key-value pairs from the server.

◆ compression_algorithm()

grpc_compression_algorithm grpc_impl::ServerContext::compression_algorithm ( ) const
inline

Return the compression algorithm the server call will request be used.

Note that the gRPC runtime may decide to ignore this request, for example, due to resource constraints, or if the server is aware the client doesn't support the requested algorithm.

◆ compression_level()

grpc_compression_level grpc_impl::ServerContext::compression_level ( ) const
inline

Return the compression algorithm to be used by the server call.

◆ compression_level_set()

bool grpc_impl::ServerContext::compression_level_set ( ) const
inline

Return a bool indicating whether the compression level for this call has been set (either implicitly or through a previous call to set_compression_level.

◆ deadline()

std::chrono::system_clock::time_point grpc_impl::ServerContext::deadline ( ) const
inline

Return the deadline for the server call.

◆ IsCancelled()

bool grpc_impl::ServerContext::IsCancelled ( ) const

IsCancelled is always safe to call when using sync or callback API.

When using async API, it is only safe to call IsCancelled after the AsyncNotifyWhenDone tag has been delivered.

◆ peer()

grpc::string grpc_impl::ServerContext::peer ( ) const

Return the peer uri in a string.

WARNING: this value is never authenticated or subject to any security related code. It must not be used for any authentication related functionality. Instead, use auth_context.

◆ raw_deadline()

gpr_timespec grpc_impl::ServerContext::raw_deadline ( ) const
inline

Return a gpr_timespec representation of the server call's deadline.

◆ set_compression_algorithm()

void grpc_impl::ServerContext::set_compression_algorithm ( grpc_compression_algorithm  algorithm)

Set algorithm to be the compression algorithm used for the server call.

Parameters
algorithmThe compression algorithm used for the server call.

◆ set_compression_level()

void grpc_impl::ServerContext::set_compression_level ( grpc_compression_level  level)
inline

Set level to be the compression level used for the server call.

Parameters
levelThe compression level used for the server call.

◆ SetLoadReportingCosts()

void grpc_impl::ServerContext::SetLoadReportingCosts ( const std::vector< grpc::string > &  cost_data)

Set the serialized load reporting costs in cost_data for the call.

◆ TryCancel()

void grpc_impl::ServerContext::TryCancel ( ) const

Cancel the Call from the server.

This is a best-effort API and depending on when it is called, the RPC may still appear successful to the client. For example, if TryCancel() is called on a separate thread, it might race with the server handler which might return success to the client before TryCancel() was even started by the thread.

It is the caller's responsibility to prevent such races and ensure that if TryCancel() is called, the serverhandler must return Status::CANCELLED. The only exception is that if the serverhandler is already returning an error status code, it is ok to not return Status::CANCELLED even if TryCancel() was called.

Note that TryCancel() does not change any of the tags that are pending on the completion queue. All pending tags will still be delivered (though their ok result may reflect the effect of cancellation).

Friends And Related Function Documentation

◆ ::grpc::GenericServerContext

friend class ::grpc::GenericServerContext
friend

◆ ::grpc::internal::ClientStreamingHandler

template<class ServiceType , class RequestType , class ResponseType >
friend class ::grpc::internal::ClientStreamingHandler
friend

◆ ::grpc::internal::ErrorMethodHandler

template<::grpc::StatusCode code>
friend class ::grpc::internal::ErrorMethodHandler
friend

◆ ::grpc::internal::RpcMethodHandler

template<class ServiceType , class RequestType , class ResponseType >
friend class ::grpc::internal::RpcMethodHandler
friend

◆ ::grpc::internal::ServerStreamingHandler

template<class ServiceType , class RequestType , class ResponseType >
friend class ::grpc::internal::ServerStreamingHandler
friend

◆ ::grpc::internal::TemplatedBidiStreamingHandler

template<class Streamer , bool WriteNeeded>
friend class ::grpc::internal::TemplatedBidiStreamingHandler
friend

◆ ::grpc::ServerInterface

friend class ::grpc::ServerInterface
friend

◆ ::grpc::testing::InteropServerContextInspector

friend class ::grpc::testing::InteropServerContextInspector
friend

◆ ::grpc::testing::ServerContextTestSpouse

friend class ::grpc::testing::ServerContextTestSpouse
friend

◆ ::grpc_impl::ClientContext

friend class ::grpc_impl::ClientContext
friend

◆ ::grpc_impl::internal::CallbackBidiHandler

template<class RequestType , class ResponseType >
friend class ::grpc_impl::internal::CallbackBidiHandler
friend

◆ ::grpc_impl::internal::CallbackClientStreamingHandler

template<class RequestType , class ResponseType >
friend class ::grpc_impl::internal::CallbackClientStreamingHandler
friend

◆ ::grpc_impl::internal::CallbackServerStreamingHandler

template<class RequestType , class ResponseType >
friend class ::grpc_impl::internal::CallbackServerStreamingHandler
friend

◆ ::grpc_impl::internal::CallbackUnaryHandler

template<class RequestType , class ResponseType >
friend class ::grpc_impl::internal::CallbackUnaryHandler
friend

◆ ::grpc_impl::internal::ServerReaderWriterBody

template<class W , class R >
friend class ::grpc_impl::internal::ServerReaderWriterBody
friend

◆ ::grpc_impl::Server

friend class ::grpc_impl::Server
friend

◆ ::grpc_impl::ServerAsyncReader

template<class W , class R >
friend class ::grpc_impl::ServerAsyncReader
friend

◆ ::grpc_impl::ServerAsyncReaderWriter

template<class W , class R >
friend class ::grpc_impl::ServerAsyncReaderWriter
friend

◆ ::grpc_impl::ServerAsyncResponseWriter

template<class W >
friend class ::grpc_impl::ServerAsyncResponseWriter
friend

◆ ::grpc_impl::ServerAsyncWriter

template<class W >
friend class ::grpc_impl::ServerAsyncWriter
friend

◆ ::grpc_impl::ServerReader

template<class R >
friend class ::grpc_impl::ServerReader
friend

◆ ::grpc_impl::ServerWriter

template<class W >
friend class ::grpc_impl::ServerWriter
friend

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