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//
//
// Copyright 2019 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 "src/cpp/server/external_connection_acceptor_impl.h"
#include <memory>
#include <utility>
#include <grpc/support/log.h>
#include <grpcpp/server_builder.h>
#include <grpcpp/support/byte_buffer.h>
#include <grpcpp/support/channel_arguments.h>
namespace grpc {
namespace internal {
namespace {
// The actual type to return to user. It co-owns the internal impl object with
// the server.
class AcceptorWrapper : public experimental::ExternalConnectionAcceptor {
public:
explicit AcceptorWrapper(std::shared_ptr<ExternalConnectionAcceptorImpl> impl)
: impl_(std::move(impl)) {}
void HandleNewConnection(NewConnectionParameters* p) override {
impl_->HandleNewConnection(p);
}
private:
std::shared_ptr<ExternalConnectionAcceptorImpl> impl_;
};
} // namespace
ExternalConnectionAcceptorImpl::ExternalConnectionAcceptorImpl(
const TString& name,
ServerBuilder::experimental_type::ExternalConnectionType type,
std::shared_ptr<ServerCredentials> creds)
: name_(name), creds_(std::move(creds)) {
GPR_ASSERT(type ==
ServerBuilder::experimental_type::ExternalConnectionType::FROM_FD);
}
std::unique_ptr<experimental::ExternalConnectionAcceptor>
ExternalConnectionAcceptorImpl::GetAcceptor() {
grpc_core::MutexLock lock(&mu_);
GPR_ASSERT(!has_acceptor_);
has_acceptor_ = true;
return std::unique_ptr<experimental::ExternalConnectionAcceptor>(
new AcceptorWrapper(shared_from_this()));
}
void ExternalConnectionAcceptorImpl::HandleNewConnection(
experimental::ExternalConnectionAcceptor::NewConnectionParameters* p) {
grpc_core::MutexLock lock(&mu_);
if (shutdown_ || !started_) {
// TODO(yangg) clean up.
gpr_log(
GPR_ERROR,
"NOT handling external connection with fd %d, started %d, shutdown %d",
p->fd, started_, shutdown_);
return;
}
if (handler_) {
handler_->Handle(p->listener_fd, p->fd, p->read_buffer.c_buffer());
}
}
void ExternalConnectionAcceptorImpl::Shutdown() {
grpc_core::MutexLock lock(&mu_);
shutdown_ = true;
}
void ExternalConnectionAcceptorImpl::Start() {
grpc_core::MutexLock lock(&mu_);
GPR_ASSERT(!started_);
GPR_ASSERT(has_acceptor_);
GPR_ASSERT(!shutdown_);
started_ = true;
}
void ExternalConnectionAcceptorImpl::SetToChannelArgs(ChannelArguments* args) {
args->SetPointer(name_, &handler_);
}
} // namespace internal
} // namespace grpc
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