mirror of
https://github.com/nestriness/cdc-file-transfer.git
synced 2026-01-30 08:55:36 +02:00
269fb2be45
Implements the cdc_stream client and adjusts asset streaming in various places to work better outside of a GGP environment. This CL tries to get quoting for SSH commands right. It also brings back the ability to start a streaming session from asset_stream_manager. Also cleans up Bazel targets setup. Since the sln file is now in root, it is no longer necessary to prepend ../ to relative filenames to make clicking on errors work.
699 lines
25 KiB
C++
699 lines
25 KiB
C++
// Copyright 2022 Google LLC
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include "asset_stream_manager/multi_session.h"
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#include "asset_stream_manager/session.h"
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#include "common/file_watcher_win.h"
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#include "common/log.h"
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#include "common/path.h"
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#include "common/platform.h"
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#include "common/port_manager.h"
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#include "common/process.h"
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#include "common/util.h"
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#include "data_store/disk_data_store.h"
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#include "manifest/content_id.h"
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#include "manifest/manifest_iterator.h"
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#include "manifest/manifest_printer.h"
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#include "manifest/manifest_proto_defs.h"
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#include "metrics/enums.h"
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#include "metrics/messages.h"
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namespace cdc_ft {
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namespace {
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// Ports used by the asset streaming service for local port forwarding on
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// workstation and gamelet.
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constexpr int kAssetStreamPortFirst = 44433;
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constexpr int kAssetStreamPortLast = 44442;
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// Stats output period (if enabled).
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constexpr double kStatsPrintDelaySec = 0.1f;
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ManifestUpdater::Operator FileWatcherActionToOperation(
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FileWatcherWin::FileAction action) {
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switch (action) {
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case FileWatcherWin::FileAction::kAdded:
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return ManifestUpdater::Operator::kAdd;
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case FileWatcherWin::FileAction::kModified:
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return ManifestUpdater::Operator::kUpdate;
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case FileWatcherWin::FileAction::kDeleted:
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return ManifestUpdater::Operator::kDelete;
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}
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// The switch must cover all actions.
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LOG_ERROR("Unhandled action: %d", static_cast<int>(action));
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assert(false);
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return ManifestUpdater::Operator::kAdd;
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}
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// Converts |modified_files| (as returned from the file watcher) into an
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// OperationList (as required by the manifest updater).
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ManifestUpdater::OperationList GetFileOperations(
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const FileWatcherWin::FileMap& modified_files) {
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AssetInfo ai;
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ManifestUpdater::OperationList ops;
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ops.reserve(modified_files.size());
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for (const auto& [path, info] : modified_files) {
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ai.path = path;
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ai.type = info.is_dir ? AssetProto::DIRECTORY : AssetProto::FILE;
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ai.size = info.size;
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ai.mtime = info.mtime;
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ops.emplace_back(FileWatcherActionToOperation(info.action), std::move(ai));
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}
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return ops;
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}
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} // namespace
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MultiSessionRunner::MultiSessionRunner(
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std::string src_dir, DataStoreWriter* data_store,
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ProcessFactory* process_factory, bool enable_stats,
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absl::Duration wait_duration, uint32_t num_updater_threads,
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MultiSessionMetricsRecorder const* metrics_recorder,
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ManifestUpdatedCb manifest_updated_cb)
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: src_dir_(std::move(src_dir)),
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data_store_(data_store),
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process_factory_(process_factory),
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file_chunks_(enable_stats),
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wait_duration_(wait_duration),
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num_updater_threads_(num_updater_threads),
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manifest_updated_cb_(std::move(manifest_updated_cb)),
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metrics_recorder_(metrics_recorder) {
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assert(metrics_recorder_);
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}
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absl::Status MultiSessionRunner::Initialize(int port,
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AssetStreamServerType type,
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ContentSentHandler content_sent) {
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// Create the manifest updater.
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UpdaterConfig cfg;
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cfg.num_threads = num_updater_threads_;
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cfg.src_dir = src_dir_;
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assert(!manifest_updater_);
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manifest_updater_ =
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std::make_unique<ManifestUpdater>(data_store_, std::move(cfg));
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// Let the manifest updater handle requests to prioritize certain assets.
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PrioritizeAssetsHandler prio_assets =
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std::bind(&ManifestUpdater::AddPriorityAssets, manifest_updater_.get(),
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std::placeholders::_1);
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// Start the server.
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assert(!server_);
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server_ = AssetStreamServer::Create(type, src_dir_, data_store_,
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&file_chunks_, std::move(content_sent),
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std::move(prio_assets));
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assert(server_);
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RETURN_IF_ERROR(server_->Start(port),
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"Failed to start asset stream server for '%s'", src_dir_);
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assert(!thread_);
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thread_ = std::make_unique<std::thread>([this]() { Run(); });
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return absl::OkStatus();
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}
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absl::Status MultiSessionRunner::Shutdown() {
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// Send shutdown signal.
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{
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absl::MutexLock lock(&mutex_);
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shutdown_ = true;
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}
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if (thread_) {
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if (thread_->joinable()) thread_->join();
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thread_.reset();
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}
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// Shut down asset stream server.
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if (server_) {
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server_->Shutdown();
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server_.reset();
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}
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return status_;
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}
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absl::Status MultiSessionRunner::WaitForManifestAck(
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const std::string& instance_id, absl::Duration fuse_timeout) {
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{
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absl::MutexLock lock(&mutex_);
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LOG_INFO("Waiting for manifest to be available");
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auto cond = [this]() { return manifest_set_ || !status_.ok(); };
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mutex_.Await(absl::Condition(&cond));
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if (!status_.ok())
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return WrapStatus(status_, "Failed to set up streaming session for '%s'",
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src_dir_);
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}
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LOG_INFO("Waiting for FUSE ack");
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assert(server_);
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RETURN_IF_ERROR(server_->WaitForManifestAck(instance_id, fuse_timeout));
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return absl::OkStatus();
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}
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absl::Status MultiSessionRunner::Status() {
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absl::MutexLock lock(&mutex_);
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return status_;
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}
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ContentIdProto MultiSessionRunner::ManifestId() const {
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assert(server_);
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return server_->GetManifestId();
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}
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void MultiSessionRunner::Run() {
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// Set up file watcher.
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// The streamed path should be a directory and exist at the beginning.
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FileWatcherWin watcher(src_dir_);
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absl::Status status = watcher.StartWatching([this]() { OnFilesChanged(); },
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[this]() { OnDirRecreated(); });
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if (!status.ok()) {
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SetStatus(
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WrapStatus(status, "Failed to update manifest for '%s'", src_dir_));
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return;
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}
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// Push the intermediate manifest(s) and the final version with this handler.
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auto push_handler = [this](const ContentIdProto& manifest_id) {
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SetManifest(manifest_id);
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};
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// Bring the manifest up to date.
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LOG_INFO("Updating manifest for '%s'...", src_dir_);
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Stopwatch sw;
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status = manifest_updater_->UpdateAll(&file_chunks_, push_handler);
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RecordManifestUpdate(*manifest_updater_, sw.Elapsed(),
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metrics::UpdateTrigger::kInitUpdateAll, status);
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if (!status.ok()) {
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SetStatus(
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WrapStatus(status, "Failed to update manifest for '%s'", src_dir_));
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return;
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}
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RecordMultiSessionStart(*manifest_updater_);
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LOG_INFO("Manifest for '%s' updated in %0.3f seconds", src_dir_,
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sw.ElapsedSeconds());
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while (!shutdown_) {
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FileWatcherWin::FileMap modified_files;
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bool clean_manifest = false;
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{
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// Wait for changes.
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absl::MutexLock lock(&mutex_);
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bool prev_files_changed = files_changed_;
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absl::Duration timeout =
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absl::Seconds(file_chunks_.HasStats() ? kStatsPrintDelaySec : 3600.0);
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if (files_changed_) {
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timeout = std::max(wait_duration_ - files_changed_timer_.Elapsed(),
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absl::Milliseconds(1));
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} else {
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files_changed_timer_.Reset();
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}
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auto cond = [this]() {
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return shutdown_ || files_changed_ || dir_recreated_;
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};
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mutex_.AwaitWithTimeout(absl::Condition(&cond), timeout);
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// If |files_changed_| became true, wait some more time before updating
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// the manifest.
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if (!prev_files_changed && files_changed_) files_changed_timer_.Reset();
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// Shut down.
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if (shutdown_) {
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LOG_INFO("MultiSession('%s'): Shutting down", src_dir_);
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break;
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}
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// Pick up modified files.
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if (!dir_recreated_ && files_changed_ &&
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files_changed_timer_.Elapsed() > wait_duration_) {
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modified_files = watcher.GetModifiedFiles();
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files_changed_ = false;
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files_changed_timer_.Reset();
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}
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if (dir_recreated_) {
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clean_manifest = true;
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dir_recreated_ = false;
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}
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} // mutex_ lock
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if (clean_manifest) {
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LOG_DEBUG(
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"Streamed directory '%s' was possibly re-created or not all changes "
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"were detected, re-building the manifest",
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src_dir_);
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modified_files.clear();
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sw.Reset();
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status = manifest_updater_->UpdateAll(&file_chunks_, push_handler);
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RecordManifestUpdate(*manifest_updater_, sw.Elapsed(),
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metrics::UpdateTrigger::kRunningUpdateAll, status);
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if (!status.ok()) {
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LOG_WARNING(
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"Updating manifest for '%s' after re-creating directory failed: "
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"'%s'",
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src_dir_, status.ToString());
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SetManifest(manifest_updater_->DefaultManifestId());
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}
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} else if (!modified_files.empty()) {
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ManifestUpdater::OperationList ops = GetFileOperations(modified_files);
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sw.Reset();
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status = manifest_updater_->Update(&ops, &file_chunks_, push_handler);
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RecordManifestUpdate(*manifest_updater_, sw.Elapsed(),
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metrics::UpdateTrigger::kRegularUpdate, status);
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if (!status.ok()) {
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LOG_WARNING("Updating manifest for '%s' failed: %s", src_dir_,
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status.ToString());
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SetManifest(manifest_updater_->DefaultManifestId());
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}
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}
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// Update stats output.
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file_chunks_.PrintStats();
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}
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}
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void MultiSessionRunner::RecordManifestUpdate(
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const ManifestUpdater& manifest_updater, absl::Duration duration,
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metrics::UpdateTrigger trigger, absl::Status status) {
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metrics::DeveloperLogEvent evt;
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evt.as_manager_data = std::make_unique<metrics::AssetStreamingManagerData>();
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evt.as_manager_data->manifest_update_data =
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std::make_unique<metrics::ManifestUpdateData>();
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evt.as_manager_data->manifest_update_data->local_duration_ms =
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absl::ToInt64Milliseconds(duration);
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evt.as_manager_data->manifest_update_data->status = status.code();
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evt.as_manager_data->manifest_update_data->trigger = trigger;
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const UpdaterStats& stats = manifest_updater.Stats();
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evt.as_manager_data->manifest_update_data->total_assets_added_or_updated =
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stats.total_assets_added_or_updated;
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evt.as_manager_data->manifest_update_data->total_assets_deleted =
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stats.total_assets_deleted;
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evt.as_manager_data->manifest_update_data->total_chunks = stats.total_chunks;
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evt.as_manager_data->manifest_update_data->total_files_added_or_updated =
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stats.total_files_added_or_updated;
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evt.as_manager_data->manifest_update_data->total_files_failed =
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stats.total_files_failed;
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evt.as_manager_data->manifest_update_data->total_processed_bytes =
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stats.total_processed_bytes;
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metrics_recorder_->RecordEvent(std::move(evt),
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metrics::EventType::kManifestUpdated);
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}
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void MultiSessionRunner::RecordMultiSessionStart(
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const ManifestUpdater& manifest_updater) {
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metrics::DeveloperLogEvent evt;
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evt.as_manager_data = std::make_unique<metrics::AssetStreamingManagerData>();
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evt.as_manager_data->multi_session_start_data =
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std::make_unique<metrics::MultiSessionStartData>();
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ManifestIterator manifest_iter(data_store_);
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absl::Status status = manifest_iter.Open(manifest_updater.ManifestId());
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if (status.ok()) {
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const AssetProto* entry = &manifest_iter.Manifest().root_dir();
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uint32_t file_count = 0;
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uint64_t total_chunks = 0;
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uint64_t total_processed_bytes = 0;
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do {
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if (entry->type() == AssetProto::FILE) {
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++file_count;
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total_chunks += entry->file_chunks_size();
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total_processed_bytes += entry->file_size();
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for (const IndirectChunkListProto& icl :
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entry->file_indirect_chunks()) {
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ChunkListProto list;
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status = data_store_->GetProto(icl.chunk_list_id(), &list);
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if (status.ok()) {
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total_chunks += list.chunks_size();
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} else {
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LOG_WARNING("Could not get proto by id: '%s'. %s",
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ContentId::ToHexString(icl.chunk_list_id()),
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status.ToString());
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}
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}
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}
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} while ((entry = manifest_iter.NextEntry()) != nullptr);
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evt.as_manager_data->multi_session_start_data->file_count = file_count;
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evt.as_manager_data->multi_session_start_data->chunk_count = total_chunks;
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evt.as_manager_data->multi_session_start_data->byte_count =
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total_processed_bytes;
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} else {
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LOG_WARNING("Could not open manifest by id: '%s'. %s",
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ContentId::ToHexString(manifest_updater.ManifestId()),
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status.ToString());
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}
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evt.as_manager_data->multi_session_start_data->min_chunk_size =
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static_cast<uint64_t>(manifest_updater.Config().min_chunk_size);
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evt.as_manager_data->multi_session_start_data->avg_chunk_size =
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static_cast<uint64_t>(manifest_updater.Config().avg_chunk_size);
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evt.as_manager_data->multi_session_start_data->max_chunk_size =
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static_cast<uint64_t>(manifest_updater.Config().max_chunk_size);
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metrics_recorder_->RecordEvent(std::move(evt),
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metrics::EventType::kMultiSessionStart);
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}
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void MultiSessionRunner::SetStatus(absl::Status status)
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ABSL_LOCKS_EXCLUDED(mutex_) {
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absl::MutexLock lock(&mutex_);
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status_ = std::move(status);
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}
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void MultiSessionRunner::OnFilesChanged() {
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absl::MutexLock lock(&mutex_);
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files_changed_ = true;
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}
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void MultiSessionRunner::OnDirRecreated() {
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absl::MutexLock lock(&mutex_);
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dir_recreated_ = true;
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}
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void MultiSessionRunner::SetManifest(const ContentIdProto& manifest_id) {
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server_->SetManifestId(manifest_id);
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if (Log::Instance()->GetLogLevel() <= LogLevel::kVerbose) {
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ManifestPrinter printer;
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ManifestProto manifest_proto;
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absl::Status status = data_store_->GetProto(manifest_id, &manifest_proto);
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std::string manifest_text;
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printer.PrintToString(manifest_proto, &manifest_text);
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if (status.ok()) {
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LOG_DEBUG("Set manifest '%s'\n'%s'", ContentId::ToHexString(manifest_id),
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manifest_text);
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} else {
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LOG_WARNING("Could not retrieve manifest from the data store '%s'",
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ContentId::ToHexString(manifest_id));
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}
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}
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// Notify thread that starts the streaming session that a manifest has been
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// set.
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absl::MutexLock lock(&mutex_);
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manifest_set_ = true;
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if (manifest_updated_cb_) {
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manifest_updated_cb_();
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}
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}
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MultiSession::MultiSession(std::string src_dir, SessionConfig cfg,
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ProcessFactory* process_factory,
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MultiSessionMetricsRecorder const* metrics_recorder,
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std::unique_ptr<DataStoreWriter> data_store)
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: src_dir_(src_dir),
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cfg_(cfg),
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process_factory_(process_factory),
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data_store_(std::move(data_store)),
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metrics_recorder_(metrics_recorder) {
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assert(metrics_recorder_);
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}
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MultiSession::~MultiSession() {
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absl::Status status = Shutdown();
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if (!status.ok()) {
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LOG_ERROR("Shutdown streaming from '%s' failed: %s", src_dir_,
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status.ToString());
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}
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}
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absl::Status MultiSession::Initialize() {
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// |data_store_| is not set in production, but it can be overridden for tests.
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if (!data_store_) {
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std::string cache_path;
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ASSIGN_OR_RETURN(cache_path, GetCachePath(src_dir_));
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ASSIGN_OR_RETURN(data_store_,
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DiskDataStore::Create(/*depth=*/0, cache_path,
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/*create_dirs=*/true),
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"Failed to create data store for '%s'", cache_path);
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}
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// Find an available local port.
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std::unordered_set<int> ports;
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ASSIGN_OR_RETURN(
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ports,
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PortManager::FindAvailableLocalPorts(kAssetStreamPortFirst,
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kAssetStreamPortLast, "127.0.0.1",
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process_factory_, true),
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"Failed to find an available local port in the range [%d, %d]",
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kAssetStreamPortFirst, kAssetStreamPortLast);
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assert(!ports.empty());
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local_asset_stream_port_ = *ports.begin();
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assert(!runner_);
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runner_ = std::make_unique<MultiSessionRunner>(
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src_dir_, data_store_.get(), process_factory_, cfg_.stats,
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absl::Milliseconds(cfg_.file_change_wait_duration_ms),
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cfg_.manifest_updater_threads, metrics_recorder_);
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RETURN_IF_ERROR(runner_->Initialize(
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local_asset_stream_port_, AssetStreamServerType::kGrpc,
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[this](uint64_t bc, uint64_t cc, std::string id) {
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this->OnContentSent(bc, cc, id);
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}),
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"Failed to initialize session runner");
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StartHeartBeatCheck();
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return absl::OkStatus();
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}
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absl::Status MultiSession::Shutdown() {
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// Stop all sessions.
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// TODO: Record error on multi-session end.
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metrics_recorder_->RecordEvent(metrics::DeveloperLogEvent(),
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metrics::EventType::kMultiSessionEnd);
|
|
{
|
|
absl::WriterMutexLock lock(&shutdownMu_);
|
|
shutdown_ = true;
|
|
}
|
|
while (!sessions_.empty()) {
|
|
std::string instance_id = sessions_.begin()->first;
|
|
RETURN_IF_ERROR(StopSession(instance_id),
|
|
"Failed to stop session for instance id '%s'", instance_id);
|
|
sessions_.erase(instance_id);
|
|
}
|
|
|
|
absl::Status status;
|
|
if (runner_) {
|
|
status = runner_->Shutdown();
|
|
}
|
|
|
|
if (heartbeat_watcher_.joinable()) {
|
|
heartbeat_watcher_.join();
|
|
}
|
|
|
|
return status;
|
|
}
|
|
|
|
absl::Status MultiSession::Status() {
|
|
return runner_ ? runner_->Status() : absl::OkStatus();
|
|
}
|
|
|
|
absl::Status MultiSession::StartSession(const std::string& instance_id,
|
|
const SessionTarget& target,
|
|
const std::string& project_id,
|
|
const std::string& organization_id) {
|
|
absl::MutexLock lock(&sessions_mutex_);
|
|
|
|
if (sessions_.find(instance_id) != sessions_.end()) {
|
|
return absl::InvalidArgumentError(absl::StrFormat(
|
|
"Session for instance id '%s' already exists", instance_id));
|
|
}
|
|
|
|
if (!runner_)
|
|
return absl::FailedPreconditionError("MultiSession not started");
|
|
|
|
absl::Status runner_status = runner_->Status();
|
|
if (!runner_status.ok()) {
|
|
return WrapStatus(runner_status,
|
|
"Failed to set up streaming session for '%s'", src_dir_);
|
|
}
|
|
|
|
auto metrics_recorder = std::make_unique<SessionMetricsRecorder>(
|
|
metrics_recorder_->GetMetricsService(),
|
|
metrics_recorder_->MultiSessionId(), project_id, organization_id);
|
|
|
|
auto session = std::make_unique<Session>(
|
|
instance_id, target, cfg_, process_factory_, std::move(metrics_recorder));
|
|
RETURN_IF_ERROR(session->Start(local_asset_stream_port_,
|
|
kAssetStreamPortFirst, kAssetStreamPortLast));
|
|
|
|
// Wait for the FUSE to receive the first intermediate manifest.
|
|
RETURN_IF_ERROR(runner_->WaitForManifestAck(instance_id, absl::Seconds(5)));
|
|
|
|
sessions_[instance_id] = std::move(session);
|
|
return absl::OkStatus();
|
|
}
|
|
|
|
absl::Status MultiSession::StopSession(const std::string& instance_id) {
|
|
absl::MutexLock lock(&sessions_mutex_);
|
|
|
|
if (sessions_.find(instance_id) == sessions_.end()) {
|
|
return absl::NotFoundError(
|
|
absl::StrFormat("No session for instance id '%s' found", instance_id));
|
|
}
|
|
|
|
if (!runner_)
|
|
return absl::FailedPreconditionError("MultiSession not started");
|
|
|
|
RETURN_IF_ERROR(sessions_[instance_id]->Stop());
|
|
sessions_.erase(instance_id);
|
|
return absl::OkStatus();
|
|
}
|
|
|
|
bool MultiSession::HasSession(const std::string& instance_id) {
|
|
absl::ReaderMutexLock lock(&sessions_mutex_);
|
|
return sessions_.find(instance_id) != sessions_.end();
|
|
}
|
|
|
|
bool MultiSession::IsSessionHealthy(const std::string& instance_id) {
|
|
absl::ReaderMutexLock lock(&sessions_mutex_);
|
|
auto iter = sessions_.find(instance_id);
|
|
if (iter == sessions_.end()) return false;
|
|
Session* session = iter->second.get();
|
|
assert(session);
|
|
return session->IsHealthy();
|
|
}
|
|
|
|
bool MultiSession::Empty() {
|
|
absl::ReaderMutexLock lock(&sessions_mutex_);
|
|
return sessions_.empty();
|
|
}
|
|
|
|
uint32_t MultiSession::GetSessionCount() {
|
|
absl::ReaderMutexLock lock(&sessions_mutex_);
|
|
return static_cast<uint32_t>(sessions_.size());
|
|
}
|
|
|
|
// static
|
|
std::string MultiSession::GetCacheDir(std::string dir) {
|
|
// Get full path, or else "..\foo" and "C:\foo" are treated differently, even
|
|
// if they map to the same directory.
|
|
dir = path::GetFullPath(dir);
|
|
#if PLATFORM_WINDOWS
|
|
// On Windows, casing is ignored.
|
|
std::for_each(dir.begin(), dir.end(), [](char& c) { c = tolower(c); });
|
|
#endif
|
|
path::EnsureEndsWithPathSeparator(&dir);
|
|
dir = path::ToUnix(std::move(dir));
|
|
ContentIdProto id = ContentId::FromDataString(dir);
|
|
|
|
// Replace invalid characters by _.
|
|
std::for_each(dir.begin(), dir.end(), [](char& c) {
|
|
static constexpr char invalid_chars[] = "<>:\"/\\|?*";
|
|
if (strchr(invalid_chars, c)) c = '_';
|
|
});
|
|
|
|
return dir + ContentId::ToHexString(id).substr(0, kDirHashLen);
|
|
}
|
|
|
|
// static
|
|
absl::StatusOr<std::string> MultiSession::GetCachePath(
|
|
const std::string& src_dir, size_t max_len) {
|
|
std::string appdata_path;
|
|
#if PLATFORM_WINDOWS
|
|
RETURN_IF_ERROR(
|
|
path::GetKnownFolderPath(path::FolderId::kRoamingAppData, &appdata_path),
|
|
"Failed to get roaming appdata path");
|
|
#elif PLATFORM_LINUX
|
|
RETURN_IF_ERROR(path::GetEnv("HOME", &appdata_path));
|
|
path::Append(&appdata_path, ".cache");
|
|
#endif
|
|
|
|
std::string base_dir = path::Join(appdata_path, "GGP", "asset_streaming");
|
|
std::string cache_dir = GetCacheDir(src_dir);
|
|
|
|
size_t total_size = base_dir.size() + 1 + cache_dir.size();
|
|
if (total_size <= max_len) return path::Join(base_dir, cache_dir);
|
|
|
|
// Path needs to be shortened. Remove |to_remove| many chars from the
|
|
// beginning of |cache_dir|, but keep the hash (last kDirHashLen bytes).
|
|
size_t to_remove = total_size - max_len;
|
|
assert(cache_dir.size() >= kDirHashLen);
|
|
if (to_remove > cache_dir.size() - kDirHashLen)
|
|
to_remove = cache_dir.size() - kDirHashLen;
|
|
|
|
// Remove UTF8 code points from the beginning.
|
|
size_t start = 0;
|
|
while (start < to_remove) {
|
|
int codepoint_len = Util::Utf8CodePointLen(cache_dir.data() + start);
|
|
// For invalid code points (codepoint_len == 0), just eat byte by byte.
|
|
start += std::max(codepoint_len, 1);
|
|
}
|
|
|
|
assert(start + kDirHashLen <= cache_dir.size());
|
|
return path::Join(base_dir, cache_dir.substr(start));
|
|
}
|
|
|
|
void MultiSession::RecordMultiSessionEvent(metrics::DeveloperLogEvent event,
|
|
metrics::EventType code) {
|
|
metrics_recorder_->RecordEvent(std::move(event), code);
|
|
}
|
|
|
|
void MultiSession::RecordSessionEvent(metrics::DeveloperLogEvent event,
|
|
metrics::EventType code,
|
|
const std::string& instance_id) {
|
|
Session* session = FindSession(instance_id);
|
|
if (session) {
|
|
session->RecordEvent(std::move(event), code);
|
|
}
|
|
}
|
|
|
|
Session* MultiSession::FindSession(const std::string& instance_id) {
|
|
absl::ReaderMutexLock lock(&sessions_mutex_);
|
|
auto session_it = sessions_.find(instance_id);
|
|
if (session_it == sessions_.end()) {
|
|
return nullptr;
|
|
}
|
|
return session_it->second.get();
|
|
}
|
|
|
|
void MultiSession::OnContentSent(size_t byte_count, size_t chunck_count,
|
|
std::string instance_id) {
|
|
if (instance_id.empty()) {
|
|
// |instance_id| is empty only in case when manifest wasn't acknowledged by
|
|
// the instance yet (ConfigStreamServiceImpl::AckManifestIdReceived was not
|
|
// invoked). This means MultiSession::StartSession is still waiting for
|
|
// manifest acknowledge and |sessions_mutex_| is currently locked. In this
|
|
// case invoking MultiSession::FindSession and waiting for |sessions_mutex_|
|
|
// to get unlocked will block the current thread, which is also responsible
|
|
// for receiving a call at ConfigStreamServiceImpl::AckManifestIdReceived.
|
|
// This causes a deadlock and leads to a DeadlineExceeded error.
|
|
LOG_WARNING("Cannot record session content for an empty instance_id.");
|
|
return;
|
|
}
|
|
Session* session = FindSession(instance_id);
|
|
if (session == nullptr) {
|
|
LOG_WARNING("Failed to find active session by instance id '%s'",
|
|
instance_id);
|
|
return;
|
|
}
|
|
session->OnContentSent(byte_count, chunck_count);
|
|
}
|
|
|
|
void MultiSession::StartHeartBeatCheck() {
|
|
heartbeat_watcher_ = std::thread([this]() ABSL_LOCKS_EXCLUDED(shutdownMu_) {
|
|
auto cond = [this]() { return shutdown_; };
|
|
while (!shutdownMu_.LockWhenWithTimeout(absl::Condition(&cond),
|
|
absl::Minutes(5))) {
|
|
absl::ReaderMutexLock lock(&sessions_mutex_);
|
|
for (auto it = sessions_.begin(); it != sessions_.end(); ++it) {
|
|
it->second->RecordHeartBeatIfChanged();
|
|
}
|
|
shutdownMu_.Unlock();
|
|
}
|
|
shutdownMu_.Unlock();
|
|
});
|
|
}
|
|
|
|
} // namespace cdc_ft
|