intermediate changes

ref:cde9a383711a11544ce7e107a78147fb96cc4029

1 files changed, 434 insertions, 0 deletions

diff --git a/contrib/libs/grpc/src/cpp/server/server_builder.cc b/contrib/libs/grpc/src/cpp/server/server_builder.cc
new file mode 100644
index 00000000000..0cc00b365ff
--- /dev/null
+++ b/contrib/libs/grpc/src/cpp/server/server_builder.cc
@@ -0,0 +1,434 @@
+/*
+ *
+ * Copyright 2015-2016 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/server_builder.h>
+
+#include <grpc/support/cpu.h>
+#include <grpc/support/log.h>
+#include <grpcpp/impl/service_type.h>
+#include <grpcpp/resource_quota.h>
+#include <grpcpp/server.h>
+
+#include <utility>
+
+#include "src/core/lib/channel/channel_args.h"
+#include "src/core/lib/gpr/string.h"
+#include "src/core/lib/gpr/useful.h"
+#include "src/cpp/server/external_connection_acceptor_impl.h"
+#include "src/cpp/server/thread_pool_interface.h"
+
+namespace grpc {
+
+static std::vector<std::unique_ptr<ServerBuilderPlugin> (*)()>*
+    g_plugin_factory_list;
+static gpr_once once_init_plugin_list = GPR_ONCE_INIT;
+
+static void do_plugin_list_init(void) {
+  g_plugin_factory_list =
+      new std::vector<std::unique_ptr<ServerBuilderPlugin> (*)()>();
+}
+
+ServerBuilder::ServerBuilder()
+    : max_receive_message_size_(INT_MIN),
+      max_send_message_size_(INT_MIN),
+      sync_server_settings_(SyncServerSettings()),
+      resource_quota_(nullptr) {
+  gpr_once_init(&once_init_plugin_list, do_plugin_list_init);
+  for (const auto& value : *g_plugin_factory_list) {
+    plugins_.emplace_back(value());
+  }
+
+  // all compression algorithms enabled by default.
+  enabled_compression_algorithms_bitset_ =
+      (1u << GRPC_COMPRESS_ALGORITHMS_COUNT) - 1;
+  memset(&maybe_default_compression_level_, 0,
+         sizeof(maybe_default_compression_level_));
+  memset(&maybe_default_compression_algorithm_, 0,
+         sizeof(maybe_default_compression_algorithm_));
+}
+
+ServerBuilder::~ServerBuilder() {
+  if (resource_quota_ != nullptr) {
+    grpc_resource_quota_unref(resource_quota_);
+  }
+}
+
+std::unique_ptr<grpc::ServerCompletionQueue> ServerBuilder::AddCompletionQueue(
+    bool is_frequently_polled) {
+  grpc::ServerCompletionQueue* cq = new grpc::ServerCompletionQueue(
+      GRPC_CQ_NEXT,
+      is_frequently_polled ? GRPC_CQ_DEFAULT_POLLING : GRPC_CQ_NON_LISTENING,
+      nullptr);
+  cqs_.push_back(cq);
+  return std::unique_ptr<grpc::ServerCompletionQueue>(cq);
+}
+
+ServerBuilder& ServerBuilder::RegisterService(Service* service) {
+  services_.emplace_back(new NamedService(service));
+  return *this;
+}
+
+ServerBuilder& ServerBuilder::RegisterService(const TString& addr,
+                                              Service* service) {
+  services_.emplace_back(new NamedService(addr, service));
+  return *this;
+}
+
+ServerBuilder& ServerBuilder::RegisterAsyncGenericService(
+    AsyncGenericService* service) {
+  if (generic_service_ || callback_generic_service_) {
+    gpr_log(GPR_ERROR,
+            "Adding multiple generic services is unsupported for now. "
+            "Dropping the service %p",
+            (void*)service);
+  } else {
+    generic_service_ = service;
+  }
+  return *this;
+}
+
+#ifdef GRPC_CALLBACK_API_NONEXPERIMENTAL
+ServerBuilder& ServerBuilder::RegisterCallbackGenericService(
+    CallbackGenericService* service) {
+  if (generic_service_ || callback_generic_service_) {
+    gpr_log(GPR_ERROR,
+            "Adding multiple generic services is unsupported for now. "
+            "Dropping the service %p",
+            (void*)service);
+  } else {
+    callback_generic_service_ = service;
+  }
+  return *this;
+}
+#else
+ServerBuilder& ServerBuilder::experimental_type::RegisterCallbackGenericService(
+    experimental::CallbackGenericService* service) {
+  if (builder_->generic_service_ || builder_->callback_generic_service_) {
+    gpr_log(GPR_ERROR,
+            "Adding multiple generic services is unsupported for now. "
+            "Dropping the service %p",
+            (void*)service);
+  } else {
+    builder_->callback_generic_service_ = service;
+  }
+  return *builder_;
+}
+#endif
+
+std::unique_ptr<grpc::experimental::ExternalConnectionAcceptor>
+ServerBuilder::experimental_type::AddExternalConnectionAcceptor(
+    experimental_type::ExternalConnectionType type,
+    std::shared_ptr<ServerCredentials> creds) {
+  TString name_prefix("external:");
+  char count_str[GPR_LTOA_MIN_BUFSIZE];
+  gpr_ltoa(static_cast<long>(builder_->acceptors_.size()), count_str);
+  builder_->acceptors_.emplace_back(
+      std::make_shared<grpc::internal::ExternalConnectionAcceptorImpl>(
+          name_prefix.append(count_str), type, creds));
+  return builder_->acceptors_.back()->GetAcceptor();
+}
+
+ServerBuilder& ServerBuilder::SetOption(
+    std::unique_ptr<ServerBuilderOption> option) {
+  options_.push_back(std::move(option));
+  return *this;
+}
+
+ServerBuilder& ServerBuilder::SetSyncServerOption(
+    ServerBuilder::SyncServerOption option, int val) {
+  switch (option) {
+    case NUM_CQS:
+      sync_server_settings_.num_cqs = val;
+      break;
+    case MIN_POLLERS:
+      sync_server_settings_.min_pollers = val;
+      break;
+    case MAX_POLLERS:
+      sync_server_settings_.max_pollers = val;
+      break;
+    case CQ_TIMEOUT_MSEC:
+      sync_server_settings_.cq_timeout_msec = val;
+      break;
+  }
+  return *this;
+}
+
+ServerBuilder& ServerBuilder::SetCompressionAlgorithmSupportStatus(
+    grpc_compression_algorithm algorithm, bool enabled) {
+  if (enabled) {
+    GPR_BITSET(&enabled_compression_algorithms_bitset_, algorithm);
+  } else {
+    GPR_BITCLEAR(&enabled_compression_algorithms_bitset_, algorithm);
+  }
+  return *this;
+}
+
+ServerBuilder& ServerBuilder::SetDefaultCompressionLevel(
+    grpc_compression_level level) {
+  maybe_default_compression_level_.is_set = true;
+  maybe_default_compression_level_.level = level;
+  return *this;
+}
+
+ServerBuilder& ServerBuilder::SetDefaultCompressionAlgorithm(
+    grpc_compression_algorithm algorithm) {
+  maybe_default_compression_algorithm_.is_set = true;
+  maybe_default_compression_algorithm_.algorithm = algorithm;
+  return *this;
+}
+
+ServerBuilder& ServerBuilder::SetResourceQuota(
+    const grpc::ResourceQuota& resource_quota) {
+  if (resource_quota_ != nullptr) {
+    grpc_resource_quota_unref(resource_quota_);
+  }
+  resource_quota_ = resource_quota.c_resource_quota();
+  grpc_resource_quota_ref(resource_quota_);
+  return *this;
+}
+
+ServerBuilder& ServerBuilder::AddListeningPort(
+    const TString& addr_uri, std::shared_ptr<ServerCredentials> creds,
+    int* selected_port) {
+  const TString uri_scheme = "dns:";
+  TString addr = addr_uri;
+  if (addr_uri.compare(0, uri_scheme.size(), uri_scheme) == 0) {
+    size_t pos = uri_scheme.size();
+    while (addr_uri[pos] == '/') ++pos;  // Skip slashes.
+    addr = addr_uri.substr(pos);
+  }
+  Port port = {addr, std::move(creds), selected_port};
+  ports_.push_back(port);
+  return *this;
+}
+
+std::unique_ptr<grpc::Server> ServerBuilder::BuildAndStart() {
+  grpc::ChannelArguments args;
+  if (max_receive_message_size_ >= -1) {
+    args.SetInt(GRPC_ARG_MAX_RECEIVE_MESSAGE_LENGTH, max_receive_message_size_);
+  }
+  if (max_send_message_size_ >= -1) {
+    args.SetInt(GRPC_ARG_MAX_SEND_MESSAGE_LENGTH, max_send_message_size_);
+  }
+  for (const auto& option : options_) {
+    option->UpdateArguments(&args);
+    option->UpdatePlugins(&plugins_);
+  }
+  args.SetInt(GRPC_COMPRESSION_CHANNEL_ENABLED_ALGORITHMS_BITSET,
+              enabled_compression_algorithms_bitset_);
+  if (maybe_default_compression_level_.is_set) {
+    args.SetInt(GRPC_COMPRESSION_CHANNEL_DEFAULT_LEVEL,
+                maybe_default_compression_level_.level);
+  }
+  if (maybe_default_compression_algorithm_.is_set) {
+    args.SetInt(GRPC_COMPRESSION_CHANNEL_DEFAULT_ALGORITHM,
+                maybe_default_compression_algorithm_.algorithm);
+  }
+
+  if (resource_quota_ != nullptr) {
+    args.SetPointerWithVtable(GRPC_ARG_RESOURCE_QUOTA, resource_quota_,
+                              grpc_resource_quota_arg_vtable());
+  }
+
+  for (const auto& plugin : plugins_) {
+    plugin->UpdateServerBuilder(this);
+    plugin->UpdateChannelArguments(&args);
+  }
+
+  // == Determine if the server has any syncrhonous methods ==
+  bool has_sync_methods = false;
+  for (const auto& value : services_) {
+    if (value->service->has_synchronous_methods()) {
+      has_sync_methods = true;
+      break;
+    }
+  }
+
+  if (!has_sync_methods) {
+    for (const auto& value : plugins_) {
+      if (value->has_sync_methods()) {
+        has_sync_methods = true;
+        break;
+      }
+    }
+  }
+
+  // If this is a Sync server, i.e a server expositing sync API, then the server
+  // needs to create some completion queues to listen for incoming requests.
+  // 'sync_server_cqs' are those internal completion queues.
+  //
+  // This is different from the completion queues added to the server via
+  // ServerBuilder's AddCompletionQueue() method (those completion queues
+  // are in 'cqs_' member variable of ServerBuilder object)
+  std::shared_ptr<std::vector<std::unique_ptr<grpc::ServerCompletionQueue>>>
+      sync_server_cqs(
+          std::make_shared<
+              std::vector<std::unique_ptr<grpc::ServerCompletionQueue>>>());
+
+  bool has_frequently_polled_cqs = false;
+  for (const auto& cq : cqs_) {
+    if (cq->IsFrequentlyPolled()) {
+      has_frequently_polled_cqs = true;
+      break;
+    }
+  }
+
+  // == Determine if the server has any callback methods ==
+  bool has_callback_methods = false;
+  for (const auto& service : services_) {
+    if (service->service->has_callback_methods()) {
+      has_callback_methods = true;
+      has_frequently_polled_cqs = true;
+      break;
+    }
+  }
+
+  const bool is_hybrid_server = has_sync_methods && has_frequently_polled_cqs;
+
+  if (has_sync_methods) {
+    grpc_cq_polling_type polling_type =
+        is_hybrid_server ? GRPC_CQ_NON_POLLING : GRPC_CQ_DEFAULT_POLLING;
+
+    // Create completion queues to listen to incoming rpc requests
+    for (int i = 0; i < sync_server_settings_.num_cqs; i++) {
+      sync_server_cqs->emplace_back(
+          new grpc::ServerCompletionQueue(GRPC_CQ_NEXT, polling_type, nullptr));
+    }
+  }
+
+  // TODO(vjpai): Add a section here for plugins once they can support callback
+  // methods
+
+  if (has_sync_methods) {
+    // This is a Sync server
+    gpr_log(GPR_INFO,
+            "Synchronous server. Num CQs: %d, Min pollers: %d, Max Pollers: "
+            "%d, CQ timeout (msec): %d",
+            sync_server_settings_.num_cqs, sync_server_settings_.min_pollers,
+            sync_server_settings_.max_pollers,
+            sync_server_settings_.cq_timeout_msec);
+  }
+
+  if (has_callback_methods) {
+    gpr_log(GPR_INFO, "Callback server.");
+  }
+
+  std::unique_ptr<grpc::Server> server(new grpc::Server(
+      &args, sync_server_cqs, sync_server_settings_.min_pollers,
+      sync_server_settings_.max_pollers, sync_server_settings_.cq_timeout_msec,
+      std::move(acceptors_), resource_quota_,
+      std::move(interceptor_creators_)));
+
+  ServerInitializer* initializer = server->initializer();
+
+  // Register all the completion queues with the server. i.e
+  //  1. sync_server_cqs: internal completion queues created IF this is a sync
+  //     server
+  //  2. cqs_: Completion queues added via AddCompletionQueue() call
+
+  for (const auto& cq : *sync_server_cqs) {
+    grpc_server_register_completion_queue(server->server_, cq->cq(), nullptr);
+    has_frequently_polled_cqs = true;
+  }
+
+  if (has_callback_methods || callback_generic_service_ != nullptr) {
+    auto* cq = server->CallbackCQ();
+    grpc_server_register_completion_queue(server->server_, cq->cq(), nullptr);
+  }
+
+  // cqs_ contains the completion queue added by calling the ServerBuilder's
+  // AddCompletionQueue() API. Some of them may not be frequently polled (i.e by
+  // calling Next() or AsyncNext()) and hence are not safe to be used for
+  // listening to incoming channels. Such completion queues must be registered
+  // as non-listening queues. In debug mode, these should have their server list
+  // tracked since these are provided the user and must be Shutdown by the user
+  // after the server is shutdown.
+  for (const auto& cq : cqs_) {
+    grpc_server_register_completion_queue(server->server_, cq->cq(), nullptr);
+    cq->RegisterServer(server.get());
+  }
+
+  if (!has_frequently_polled_cqs) {
+    gpr_log(GPR_ERROR,
+            "At least one of the completion queues must be frequently polled");
+    return nullptr;
+  }
+
+  for (const auto& value : services_) {
+    if (!server->RegisterService(value->host.get(), value->service)) {
+      return nullptr;
+    }
+  }
+
+  for (const auto& value : plugins_) {
+    value->InitServer(initializer);
+  }
+
+  if (generic_service_) {
+    server->RegisterAsyncGenericService(generic_service_);
+  } else if (callback_generic_service_) {
+    server->RegisterCallbackGenericService(callback_generic_service_);
+  } else {
+    for (const auto& value : services_) {
+      if (value->service->has_generic_methods()) {
+        gpr_log(GPR_ERROR,
+                "Some methods were marked generic but there is no "
+                "generic service registered.");
+        return nullptr;
+      }
+    }
+  }
+
+  for (auto& port : ports_) {
+    int r = server->AddListeningPort(port.addr, port.creds.get());
+    if (!r) {
+      server->Shutdown();
+      return nullptr;
+    }
+    if (port.selected_port != nullptr) {
+      *port.selected_port = r;
+    }
+  }
+
+  auto cqs_data = cqs_.empty() ? nullptr : &cqs_[0];
+  server->Start(cqs_data, cqs_.size());
+
+  for (const auto& value : plugins_) {
+    value->Finish(initializer);
+  }
+
+  return server;
+}
+
+void ServerBuilder::InternalAddPluginFactory(
+    std::unique_ptr<ServerBuilderPlugin> (*CreatePlugin)()) {
+  gpr_once_init(&once_init_plugin_list, do_plugin_list_init);
+  (*g_plugin_factory_list).push_back(CreatePlugin);
+}
+
+ServerBuilder& ServerBuilder::EnableWorkaround(grpc_workaround_list id) {
+  switch (id) {
+    case GRPC_WORKAROUND_ID_CRONET_COMPRESSION:
+      return AddChannelArgument(GRPC_ARG_WORKAROUND_CRONET_COMPRESSION, 1);
+    default:
+      gpr_log(GPR_ERROR, "Workaround %u does not exist or is obsolete.", id);
+      return *this;
+  }
+}
+
+}  // namespace grpc