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/*
*
* Copyright 2018 gRPC authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
#ifndef GRPCPP_IMPL_CODEGEN_CLIENT_INTERCEPTOR_H
#define GRPCPP_IMPL_CODEGEN_CLIENT_INTERCEPTOR_H
#include <vector>
#include <grpc/impl/codegen/log.h>
#include <grpcpp/impl/codegen/interceptor.h>
#include <grpcpp/impl/codegen/string_ref.h>
namespace grpc {
class ClientContext;
class Channel;
namespace internal {
template <int I>
class CallNoOp;
}
namespace experimental {
class ClientRpcInfo;
class ClientInterceptor {
public:
virtual ~ClientInterceptor() {}
virtual void Intercept(InterceptorBatchMethods* methods) = 0;
};
class ClientInterceptorFactoryInterface {
public:
virtual ~ClientInterceptorFactoryInterface() {}
virtual ClientInterceptor* CreateClientInterceptor(ClientRpcInfo* info) = 0;
};
class ClientRpcInfo {
public:
ClientRpcInfo() {}
ClientRpcInfo(grpc::ClientContext* ctx, const char* method,
const grpc::Channel* channel,
const std::vector<std::unique_ptr<
experimental::ClientInterceptorFactoryInterface>>& creators)
: ctx_(ctx), method_(method), channel_(channel) {
for (const auto& creator : creators) {
interceptors_.push_back(std::unique_ptr<experimental::ClientInterceptor>(
creator->CreateClientInterceptor(this)));
}
}
~ClientRpcInfo(){};
ClientRpcInfo(const ClientRpcInfo&) = delete;
ClientRpcInfo(ClientRpcInfo&&) = default;
ClientRpcInfo& operator=(ClientRpcInfo&&) = default;
// Getter methods
const char* method() { return method_; }
const Channel* channel() { return channel_; }
grpc::ClientContext* client_context() { return ctx_; }
// const grpc::InterceptedMessage& outgoing_message();
// grpc::InterceptedMessage *mutable_outgoing_message();
// const grpc::InterceptedMessage& received_message();
// grpc::InterceptedMessage *mutable_received_message();
// const std::multimap<grpc::string, grpc::string>* client_initial_metadata()
// { return &ctx_->send_initial_metadata_; } const
// std::multimap<grpc::string_ref, grpc::string_ref>*
// server_initial_metadata() { return &ctx_->GetServerInitialMetadata(); }
// const std::multimap<grpc::string_ref, grpc::string_ref>*
// server_trailing_metadata() { return &ctx_->GetServerTrailingMetadata(); }
// const Status *status();
// template <class M>
// void set_outgoing_message(M* msg); // edit outgoing message
// template <class M>
// void set_received_message(M* msg); // edit received message
// for hijacking (can be called multiple times for streaming)
// template <class M>
// void inject_received_message(M* msg);
// void set_client_initial_metadata(
// const std::multimap<grpc::string, grpc::string>& overwrite);
// void set_server_initial_metadata(const std::multimap<grpc::string,
// grpc::string>& overwrite); void set_server_trailing_metadata(const
// std::multimap<grpc::string, grpc::string>& overwrite); void
// set_status(Status status);
public:
/* Runs interceptor at pos \a pos. If \a reverse is set, the interceptor order
* is the reverse */
void RunInterceptor(
experimental::InterceptorBatchMethods* interceptor_methods,
unsigned int pos) {
GPR_CODEGEN_ASSERT(pos < interceptors_.size());
interceptors_[pos]->Intercept(interceptor_methods);
}
grpc::ClientContext* ctx_ = nullptr;
const char* method_ = nullptr;
const grpc::Channel* channel_ = nullptr;
public:
std::vector<std::unique_ptr<experimental::ClientInterceptor>> interceptors_;
bool hijacked_ = false;
int hijacked_interceptor_ = false;
// template <class Op1 = internal::CallNoOp<1>, class Op2 =
// internal::CallNoOp<2>,
// class Op3 = internal::CallNoOp<3>, class Op4 =
// internal::CallNoOp<4>, class Op5 = internal::CallNoOp<5>, class Op6
// = internal::CallNoOp<6>>
// friend class internal::InterceptorBatchMethodsImpl;
};
} // namespace experimental
} // namespace grpc
#endif // GRPCPP_IMPL_CODEGEN_CLIENT_INTERCEPTOR_H
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