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/*
*
* Copyright 2015 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.
*
*/
#include <grpcpp/client_context.h>
#include <grpc/compression.h>
#include <grpc/grpc.h>
#include <grpc/support/alloc.h>
#include <grpc/support/log.h>
#include <grpc/support/string_util.h>
#include <grpcpp/impl/codegen/interceptor_common.h>
#include <grpcpp/impl/grpc_library.h>
#include <grpcpp/security/credentials.h>
#include <grpcpp/server_context.h>
#include <grpcpp/support/time.h>
namespace grpc {
class DefaultGlobalClientCallbacks final
: public ClientContext::GlobalCallbacks {
public:
~DefaultGlobalClientCallbacks() override {}
void DefaultConstructor(ClientContext* context) override {}
void Destructor(ClientContext* context) override {}
};
static internal::GrpcLibraryInitializer g_gli_initializer;
static DefaultGlobalClientCallbacks g_default_client_callbacks;
static ClientContext::GlobalCallbacks* g_client_callbacks =
&g_default_client_callbacks;
ClientContext::ClientContext()
: initial_metadata_received_(false),
wait_for_ready_(false),
wait_for_ready_explicitly_set_(false),
idempotent_(false),
cacheable_(false),
call_(nullptr),
call_canceled_(false),
deadline_(gpr_inf_future(GPR_CLOCK_REALTIME)),
census_context_(nullptr),
propagate_from_call_(nullptr),
initial_metadata_corked_(false) {
g_client_callbacks->DefaultConstructor(this);
}
ClientContext::~ClientContext() {
if (call_) {
grpc_call_unref(call_);
}
g_client_callbacks->Destructor(this);
}
std::unique_ptr<ClientContext> ClientContext::FromServerContext(
const ServerContext& context, PropagationOptions options) {
std::unique_ptr<ClientContext> ctx(new ClientContext);
ctx->propagate_from_call_ = context.call_;
ctx->propagation_options_ = options;
return ctx;
}
void ClientContext::AddMetadata(const grpc::string& meta_key,
const grpc::string& meta_value) {
send_initial_metadata_.insert(std::make_pair(meta_key, meta_value));
}
void ClientContext::set_call(grpc_call* call,
const std::shared_ptr<Channel>& channel) {
std::unique_lock<std::mutex> lock(mu_);
GPR_ASSERT(call_ == nullptr);
call_ = call;
channel_ = channel;
if (creds_ && !creds_->ApplyToCall(call_)) {
// TODO(yashykt): should interceptors also see this status?
SendCancelToInterceptors();
grpc_call_cancel_with_status(call, GRPC_STATUS_CANCELLED,
"Failed to set credentials to rpc.", nullptr);
}
if (call_canceled_) {
SendCancelToInterceptors();
grpc_call_cancel(call_, nullptr);
}
}
void ClientContext::set_compression_algorithm(
grpc_compression_algorithm algorithm) {
compression_algorithm_ = algorithm;
const char* algorithm_name = nullptr;
if (!grpc_compression_algorithm_name(algorithm, &algorithm_name)) {
gpr_log(GPR_ERROR, "Name for compression algorithm '%d' unknown.",
algorithm);
abort();
}
GPR_ASSERT(algorithm_name != nullptr);
AddMetadata(GRPC_COMPRESSION_REQUEST_ALGORITHM_MD_KEY, algorithm_name);
}
void ClientContext::TryCancel() {
std::unique_lock<std::mutex> lock(mu_);
if (call_) {
SendCancelToInterceptors();
grpc_call_cancel(call_, nullptr);
} else {
call_canceled_ = true;
}
}
void ClientContext::SendCancelToInterceptors() {
internal::CancelInterceptorBatchMethods cancel_methods;
for (size_t i = 0; i < rpc_info_.interceptors_.size(); i++) {
rpc_info_.RunInterceptor(&cancel_methods, i);
}
}
grpc::string ClientContext::peer() const {
grpc::string peer;
if (call_) {
char* c_peer = grpc_call_get_peer(call_);
peer = c_peer;
gpr_free(c_peer);
}
return peer;
}
void ClientContext::SetGlobalCallbacks(GlobalCallbacks* client_callbacks) {
GPR_ASSERT(g_client_callbacks == &g_default_client_callbacks);
GPR_ASSERT(client_callbacks != nullptr);
GPR_ASSERT(client_callbacks != &g_default_client_callbacks);
g_client_callbacks = client_callbacks;
}
} // namespace grpc
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