public override void TestFixtureSetUp()
        {
            base.TestFixtureSetUp();

            _config = new TFChunkDbConfig(PathName,
                                          new VersionedPatternFileNamingStrategy(PathName, "chunk-"),
                                          1000,
                                          0,
                                          new InMemoryCheckpoint(1711),
                                          new InMemoryCheckpoint(5500),
                                          new InMemoryCheckpoint(5500),
                                          new InMemoryCheckpoint(1111));

            var rnd = new Random();
            _file1Contents = new byte[_config.ChunkSize];
            _file2Contents = new byte[_config.ChunkSize];
            rnd.NextBytes(_file1Contents);
            rnd.NextBytes(_file2Contents);

            DbUtil.CreateSingleChunk(_config, 0, GetFilePathFor("chunk-000000.000001"), contents:_file1Contents);
            DbUtil.CreateSingleChunk(_config, 1, GetFilePathFor("chunk-000001.000002"), contents: _file2Contents);

            var truncator = new TFChunkDbTruncator(_config);
            truncator.TruncateDb(_config.TruncateCheckpoint.ReadNonFlushed());
        }
예제 #2
0
        public override void TestFixtureSetUp()
        {
            base.TestFixtureSetUp();

            if (TruncateCheckpoint == long.MinValue)
                throw new InvalidOperationException("AckCheckpoint must be set in WriteTestScenario.");

            OnBeforeTruncating();

            // need to close db before truncator can delete files

            ReadIndex.Close();
            ReadIndex.Dispose();

            TableIndex.Close(removeFiles: false);

            Db.Close();
            Db.Dispose();

            var truncator = new TFChunkDbTruncator(Db.Config);
            truncator.TruncateDb(TruncateCheckpoint);
        }
        public override void TestFixtureSetUp()
        {
            base.TestFixtureSetUp();

            _config = new TFChunkDbConfig(PathName,
                                          new VersionedPatternFileNamingStrategy(PathName, "chunk-"),
                                          1000,
                                          0,
                                          new InMemoryCheckpoint(11111),
                                          new InMemoryCheckpoint(5500),
                                          new InMemoryCheckpoint(5500),
                                          new InMemoryCheckpoint(0));

            DbUtil.CreateMultiChunk(_config, 0, 2, GetFilePathFor("chunk-000000.000001"));
            DbUtil.CreateMultiChunk(_config, 0, 2, GetFilePathFor("chunk-000000.000002"));
            DbUtil.CreateMultiChunk(_config, 3, 10, GetFilePathFor("chunk-000003.000001"));
            DbUtil.CreateMultiChunk(_config, 3, 10, GetFilePathFor("chunk-000003.000002"));
            DbUtil.CreateMultiChunk(_config, 7, 8, GetFilePathFor("chunk-000007.000001"));
            DbUtil.CreateOngoingChunk(_config, 11, GetFilePathFor("chunk-000011.000000"));

            var truncator = new TFChunkDbTruncator(_config);
            truncator.TruncateDb(_config.TruncateCheckpoint.ReadNonFlushed());
        }
예제 #4
0
        public SingleVNode(TFChunkDb db, 
                           SingleVNodeSettings vNodeSettings, 
                           bool dbVerifyHashes, 
                           int memTableEntryCount, 
                           params ISubsystem[] subsystems)
        {
            Ensure.NotNull(db, "db");
            Ensure.NotNull(vNodeSettings, "vNodeSettings");

            _settings = vNodeSettings;

            _mainBus = new InMemoryBus("MainBus");
            _controller = new SingleVNodeController(_mainBus, _settings.ExternalHttpEndPoint, db, this);
            _mainQueue = new QueuedHandler(_controller, "MainQueue");
            _controller.SetMainQueue(_mainQueue);

            _subsystems = subsystems;

            // MONITORING
            var monitoringInnerBus = new InMemoryBus("MonitoringInnerBus", watchSlowMsg: false);
            var monitoringRequestBus = new InMemoryBus("MonitoringRequestBus", watchSlowMsg: false);
            var monitoringQueue = new QueuedHandlerThreadPool(monitoringInnerBus, "MonitoringQueue", true, TimeSpan.FromMilliseconds(100));
            var monitoring = new MonitoringService(monitoringQueue,
                                                   monitoringRequestBus,
                                                   _mainQueue,
                                                   db.Config.WriterCheckpoint,
                                                   db.Config.Path,
                                                   vNodeSettings.StatsPeriod,
                                                   _settings.ExternalHttpEndPoint,
                                                   vNodeSettings.StatsStorage);
            _mainBus.Subscribe(monitoringQueue.WidenFrom<SystemMessage.SystemInit, Message>());
            _mainBus.Subscribe(monitoringQueue.WidenFrom<SystemMessage.StateChangeMessage, Message>());
            _mainBus.Subscribe(monitoringQueue.WidenFrom<SystemMessage.BecomeShuttingDown, Message>());
            _mainBus.Subscribe(monitoringQueue.WidenFrom<SystemMessage.BecomeShutdown, Message>());
            _mainBus.Subscribe(monitoringQueue.WidenFrom<ClientMessage.WriteEventsCompleted, Message>());
            monitoringInnerBus.Subscribe<SystemMessage.SystemInit>(monitoring);
            monitoringInnerBus.Subscribe<SystemMessage.StateChangeMessage>(monitoring);
            monitoringInnerBus.Subscribe<SystemMessage.BecomeShuttingDown>(monitoring);
            monitoringInnerBus.Subscribe<SystemMessage.BecomeShutdown>(monitoring);
            monitoringInnerBus.Subscribe<ClientMessage.WriteEventsCompleted>(monitoring);
            monitoringInnerBus.Subscribe<MonitoringMessage.GetFreshStats>(monitoring);

            var truncPos = db.Config.TruncateCheckpoint.Read();
            if (truncPos != -1)
            {
                Log.Info("Truncate checkpoint is present. Truncate: {0} (0x{0:X}), Writer: {1} (0x{1:X}), Chaser: {2} (0x{2:X}), Epoch: {3} (0x{3:X})",
                         truncPos, db.Config.WriterCheckpoint.Read(), db.Config.ChaserCheckpoint.Read(), db.Config.EpochCheckpoint.Read());
                var truncator = new TFChunkDbTruncator(db.Config);
                truncator.TruncateDb(truncPos);
            }

            db.Open(dbVerifyHashes);

            // STORAGE SUBSYSTEM
            var indexPath = Path.Combine(db.Config.Path, "index");
            var readerPool = new ObjectPool<ITransactionFileReader>(
                "ReadIndex readers pool", ESConsts.PTableInitialReaderCount, ESConsts.PTableMaxReaderCount,
                () => new TFChunkReader(db, db.Config.WriterCheckpoint));
            var tableIndex = new TableIndex(indexPath,
                                            () => new HashListMemTable(maxSize: memTableEntryCount * 2),
                                            () => new TFReaderLease(readerPool),
                                            maxSizeForMemory: memTableEntryCount,
                                            maxTablesPerLevel: 2,
                                            inMem: db.Config.InMemDb);
            var hasher = new XXHashUnsafe();
            var readIndex = new ReadIndex(_mainQueue,
                                          readerPool,
                                          tableIndex,
                                          hasher,
                                          ESConsts.StreamInfoCacheCapacity,
                                          Application.IsDefined(Application.AdditionalCommitChecks),
                                          Application.IsDefined(Application.InfiniteMetastreams) ? int.MaxValue : 1);
            var writer = new TFChunkWriter(db);
            var epochManager = new EpochManager(ESConsts.CachedEpochCount,
                                                db.Config.EpochCheckpoint,
                                                writer,
                                                initialReaderCount: 1,
                                                maxReaderCount: 5,
                                                readerFactory: () => new TFChunkReader(db, db.Config.WriterCheckpoint));
            epochManager.Init();

            var storageWriter = new StorageWriterService(_mainQueue, _mainBus, _settings.MinFlushDelay,
                                                         db, writer, readIndex.IndexWriter, epochManager); // subscribes internally
            monitoringRequestBus.Subscribe<MonitoringMessage.InternalStatsRequest>(storageWriter);

            var storageReader = new StorageReaderService(_mainQueue, _mainBus, readIndex, ESConsts.StorageReaderThreadCount, db.Config.WriterCheckpoint);
            _mainBus.Subscribe<SystemMessage.SystemInit>(storageReader);
            _mainBus.Subscribe<SystemMessage.BecomeShuttingDown>(storageReader);
            _mainBus.Subscribe<SystemMessage.BecomeShutdown>(storageReader);
            monitoringRequestBus.Subscribe<MonitoringMessage.InternalStatsRequest>(storageReader);

            var chaser = new TFChunkChaser(db, db.Config.WriterCheckpoint, db.Config.ChaserCheckpoint);
            var storageChaser = new StorageChaser(_mainQueue, db.Config.WriterCheckpoint, chaser, readIndex.IndexCommitter, epochManager);
            _mainBus.Subscribe<SystemMessage.SystemInit>(storageChaser);
            _mainBus.Subscribe<SystemMessage.SystemStart>(storageChaser);
            _mainBus.Subscribe<SystemMessage.BecomeShuttingDown>(storageChaser);

            var storageScavenger = new StorageScavenger(db,
                                                        tableIndex,
                                                        hasher,
                                                        readIndex,
                                                        Application.IsDefined(Application.AlwaysKeepScavenged),
                                                        mergeChunks: false /*!Application.IsDefined(Application.DisableMergeChunks)*/);
            // ReSharper disable RedundantTypeArgumentsOfMethod
            _mainBus.Subscribe<ClientMessage.ScavengeDatabase>(storageScavenger);
            // ReSharper restore RedundantTypeArgumentsOfMethod

            // MISC WORKERS
            _workerBuses = Enumerable.Range(0, vNodeSettings.WorkerThreads).Select(queueNum =>
                new InMemoryBus(string.Format("Worker #{0} Bus", queueNum + 1),
                                watchSlowMsg: true,
                                slowMsgThreshold: TimeSpan.FromMilliseconds(200))).ToArray();
            _workersHandler = new MultiQueuedHandler(
                    vNodeSettings.WorkerThreads,
                    queueNum => new QueuedHandlerThreadPool(_workerBuses[queueNum],
                                                            string.Format("Worker #{0}", queueNum + 1),
                                                            groupName: "Workers",
                                                            watchSlowMsg: true,
                                                            slowMsgThreshold: TimeSpan.FromMilliseconds(200)));

            // AUTHENTICATION INFRASTRUCTURE
            var passwordHashAlgorithm = new Rfc2898PasswordHashAlgorithm();
            var dispatcher = new IODispatcher(_mainQueue, new PublishEnvelope(_workersHandler, crossThread: true));
            var internalAuthenticationProvider = new InternalAuthenticationProvider(dispatcher, passwordHashAlgorithm, ESConsts.CachedPrincipalCount);
            var passwordChangeNotificationReader = new PasswordChangeNotificationReader(_mainQueue, dispatcher);
            _mainBus.Subscribe<SystemMessage.SystemStart>(passwordChangeNotificationReader);
            _mainBus.Subscribe<SystemMessage.BecomeShutdown>(passwordChangeNotificationReader);
            _mainBus.Subscribe(internalAuthenticationProvider);
            SubscribeWorkers(bus =>
            {
                bus.Subscribe(dispatcher.ForwardReader);
                bus.Subscribe(dispatcher.BackwardReader);
                bus.Subscribe(dispatcher.Writer);
                bus.Subscribe(dispatcher.StreamDeleter);
                bus.Subscribe(dispatcher);
            });

            // TCP
            {
                var tcpService = new TcpService(_mainQueue, _settings.ExternalTcpEndPoint, _workersHandler,
                                                TcpServiceType.External, TcpSecurityType.Normal, new ClientTcpDispatcher(),
                                                ESConsts.ExternalHeartbeatInterval, ESConsts.ExternalHeartbeatTimeout,
                                                internalAuthenticationProvider, null);
                _mainBus.Subscribe<SystemMessage.SystemInit>(tcpService);
                _mainBus.Subscribe<SystemMessage.SystemStart>(tcpService);
                _mainBus.Subscribe<SystemMessage.BecomeShuttingDown>(tcpService);
            }

            // SECURE TCP
            if (vNodeSettings.ExternalSecureTcpEndPoint != null)
            {
                var secureTcpService = new TcpService(_mainQueue, _settings.ExternalSecureTcpEndPoint, _workersHandler,
                                                      TcpServiceType.External, TcpSecurityType.Secure, new ClientTcpDispatcher(),
                                                      ESConsts.ExternalHeartbeatInterval, ESConsts.ExternalHeartbeatTimeout,
                                                      internalAuthenticationProvider, _settings.Certificate);
                _mainBus.Subscribe<SystemMessage.SystemInit>(secureTcpService);
                _mainBus.Subscribe<SystemMessage.SystemStart>(secureTcpService);
                _mainBus.Subscribe<SystemMessage.BecomeShuttingDown>(secureTcpService);
            }

            SubscribeWorkers(bus =>
            {
                var tcpSendService = new TcpSendService();
                // ReSharper disable RedundantTypeArgumentsOfMethod
                bus.Subscribe<TcpMessage.TcpSend>(tcpSendService);
                // ReSharper restore RedundantTypeArgumentsOfMethod
            });

            // HTTP
            var httpAuthenticationProviders = new List<HttpAuthenticationProvider>
            {
                new BasicHttpAuthenticationProvider(internalAuthenticationProvider),
            };
            if (_settings.EnableTrustedAuth)
                httpAuthenticationProviders.Add(new TrustedHttpAuthenticationProvider());
            httpAuthenticationProviders.Add(new AnonymousHttpAuthenticationProvider());

            var httpPipe = new HttpMessagePipe();
            var httpSendService = new HttpSendService(httpPipe, forwardRequests: false);
            _mainBus.Subscribe<SystemMessage.StateChangeMessage>(httpSendService);
            _mainBus.Subscribe(new WideningHandler<HttpMessage.SendOverHttp, Message>(_workersHandler));
            SubscribeWorkers(bus =>
            {
                bus.Subscribe<HttpMessage.HttpSend>(httpSendService);
                bus.Subscribe<HttpMessage.HttpSendPart>(httpSendService);
                bus.Subscribe<HttpMessage.HttpBeginSend>(httpSendService);
                bus.Subscribe<HttpMessage.HttpEndSend>(httpSendService);
                bus.Subscribe<HttpMessage.SendOverHttp>(httpSendService);
            });

            _httpService = new HttpService(ServiceAccessibility.Public, _mainQueue, new TrieUriRouter(), 
                                            _workersHandler, vNodeSettings.HttpPrefixes);
            _httpService.SetupController(new AdminController(_mainQueue));
            _httpService.SetupController(new PingController());
            _httpService.SetupController(new StatController(monitoringQueue, _workersHandler));
            _httpService.SetupController(new AtomController(httpSendService, _mainQueue, _workersHandler));
            _httpService.SetupController(new GuidController(_mainQueue));
            _httpService.SetupController(new UsersController(httpSendService, _mainQueue, _workersHandler));

            _mainBus.Subscribe<SystemMessage.SystemInit>(_httpService);
            _mainBus.Subscribe<SystemMessage.BecomeShuttingDown>(_httpService);
            _mainBus.Subscribe<HttpMessage.PurgeTimedOutRequests>(_httpService);

            SubscribeWorkers(bus =>
            {
                HttpService.CreateAndSubscribePipeline(bus, httpAuthenticationProviders.ToArray());
            });

            // REQUEST MANAGEMENT
            var requestManagement = new RequestManagementService(_mainQueue, 1, 1, vNodeSettings.PrepareTimeout, vNodeSettings.CommitTimeout);
            _mainBus.Subscribe<SystemMessage.SystemInit>(requestManagement);
            _mainBus.Subscribe<ClientMessage.WriteEvents>(requestManagement);
            _mainBus.Subscribe<ClientMessage.TransactionStart>(requestManagement);
            _mainBus.Subscribe<ClientMessage.TransactionWrite>(requestManagement);
            _mainBus.Subscribe<ClientMessage.TransactionCommit>(requestManagement);
            _mainBus.Subscribe<ClientMessage.DeleteStream>(requestManagement);
            _mainBus.Subscribe<StorageMessage.RequestCompleted>(requestManagement);
            _mainBus.Subscribe<StorageMessage.CheckStreamAccessCompleted>(requestManagement);
            _mainBus.Subscribe<StorageMessage.AlreadyCommitted>(requestManagement);
            _mainBus.Subscribe<StorageMessage.CommitAck>(requestManagement);
            _mainBus.Subscribe<StorageMessage.PrepareAck>(requestManagement);
            _mainBus.Subscribe<StorageMessage.WrongExpectedVersion>(requestManagement);
            _mainBus.Subscribe<StorageMessage.InvalidTransaction>(requestManagement);
            _mainBus.Subscribe<StorageMessage.StreamDeleted>(requestManagement);
            _mainBus.Subscribe<StorageMessage.RequestManagerTimerTick>(requestManagement);

            // SUBSCRIPTIONS
            var subscrBus = new InMemoryBus("SubscriptionsBus", true, TimeSpan.FromMilliseconds(50));
            var subscrQueue = new QueuedHandlerThreadPool(subscrBus, "Subscriptions", false);
            _mainBus.Subscribe(subscrQueue.WidenFrom<SystemMessage.SystemStart, Message>());
            _mainBus.Subscribe(subscrQueue.WidenFrom<SystemMessage.BecomeShuttingDown, Message>());
            _mainBus.Subscribe(subscrQueue.WidenFrom<TcpMessage.ConnectionClosed, Message>());
            _mainBus.Subscribe(subscrQueue.WidenFrom<ClientMessage.SubscribeToStream, Message>());
            _mainBus.Subscribe(subscrQueue.WidenFrom<ClientMessage.UnsubscribeFromStream, Message>());
            _mainBus.Subscribe(subscrQueue.WidenFrom<SubscriptionMessage.PollStream, Message>());
            _mainBus.Subscribe(subscrQueue.WidenFrom<SubscriptionMessage.CheckPollTimeout, Message>());
            _mainBus.Subscribe(subscrQueue.WidenFrom<StorageMessage.EventCommited, Message>());

            var subscription = new SubscriptionsService(_mainQueue, subscrQueue, readIndex);
            subscrBus.Subscribe<SystemMessage.SystemStart>(subscription);
            subscrBus.Subscribe<SystemMessage.BecomeShuttingDown>(subscription);
            subscrBus.Subscribe<TcpMessage.ConnectionClosed>(subscription);
            subscrBus.Subscribe<ClientMessage.SubscribeToStream>(subscription);
            subscrBus.Subscribe<ClientMessage.UnsubscribeFromStream>(subscription);
            subscrBus.Subscribe<SubscriptionMessage.PollStream>(subscription);
            subscrBus.Subscribe<SubscriptionMessage.CheckPollTimeout>(subscription);
            subscrBus.Subscribe<StorageMessage.EventCommited>(subscription);

            // USER MANAGEMENT
            var ioDispatcher = new IODispatcher(_mainQueue, new PublishEnvelope(_mainQueue));
            _mainBus.Subscribe(ioDispatcher.BackwardReader);
            _mainBus.Subscribe(ioDispatcher.ForwardReader);
            _mainBus.Subscribe(ioDispatcher.Writer);
            _mainBus.Subscribe(ioDispatcher.StreamDeleter);
            _mainBus.Subscribe(ioDispatcher);

            var userManagement = new UserManagementService(
                _mainQueue, ioDispatcher, passwordHashAlgorithm, vNodeSettings.SkipInitializeStandardUsersCheck);
            _mainBus.Subscribe<UserManagementMessage.Create>(userManagement);
            _mainBus.Subscribe<UserManagementMessage.Update>(userManagement);
            _mainBus.Subscribe<UserManagementMessage.Enable>(userManagement);
            _mainBus.Subscribe<UserManagementMessage.Disable>(userManagement);
            _mainBus.Subscribe<UserManagementMessage.Delete>(userManagement);
            _mainBus.Subscribe<UserManagementMessage.ResetPassword>(userManagement);
            _mainBus.Subscribe<UserManagementMessage.ChangePassword>(userManagement);
            _mainBus.Subscribe<UserManagementMessage.Get>(userManagement);
            _mainBus.Subscribe<UserManagementMessage.GetAll>(userManagement);
            _mainBus.Subscribe<SystemMessage.BecomeMaster>(userManagement);

            // TIMER
            _timeProvider = new RealTimeProvider();
            _timerService = new TimerService(new ThreadBasedScheduler(_timeProvider));
            _mainBus.Subscribe<SystemMessage.BecomeShutdown>(_timerService);
            _mainBus.Subscribe<TimerMessage.Schedule>(_timerService);

            _workersHandler.Start();
            _mainQueue.Start();
            monitoringQueue.Start();
            subscrQueue.Start();

            if (subsystems != null)
                foreach (var subsystem in subsystems)
                    subsystem.Register(db, _mainQueue, _mainBus, _timerService, _timeProvider, httpSendService, new[]{_httpService}, _workersHandler);
        }
예제 #5
0
        public ClusterVNode(TFChunkDb db,
                            ClusterVNodeSettings vNodeSettings,
                            IGossipSeedSource gossipSeedSource,
                            bool dbVerifyHashes,
                            int memTableEntryCount,
                            params ISubsystem[] subsystems)
        {
            Ensure.NotNull(db, "db");
            Ensure.NotNull(vNodeSettings, "vNodeSettings");
            Ensure.NotNull(gossipSeedSource, "gossipSeedSource");

            _nodeInfo = vNodeSettings.NodeInfo;
            _mainBus = new InMemoryBus("MainBus");

            var forwardingProxy = new MessageForwardingProxy();
            // MISC WORKERS
            _workerBuses = Enumerable.Range(0, vNodeSettings.WorkerThreads).Select(queueNum =>
                new InMemoryBus(string.Format("Worker #{0} Bus", queueNum + 1),
                                watchSlowMsg: true,
                                slowMsgThreshold: TimeSpan.FromMilliseconds(200))).ToArray();
            _workersHandler = new MultiQueuedHandler(
                    vNodeSettings.WorkerThreads,
                    queueNum => new QueuedHandlerThreadPool(_workerBuses[queueNum],
                                                            string.Format("Worker #{0}", queueNum + 1),
                                                            groupName: "Workers",
                                                            watchSlowMsg: true,
                                                            slowMsgThreshold: TimeSpan.FromMilliseconds(200)));

            _controller = new ClusterVNodeController(_mainBus, _nodeInfo, db, vNodeSettings, this, forwardingProxy);
            _mainQueue = new QueuedHandler(_controller, "MainQueue");
            _controller.SetMainQueue(_mainQueue);

            _subsystems = subsystems;

            // MONITORING
            var monitoringInnerBus = new InMemoryBus("MonitoringInnerBus", watchSlowMsg: false);
            var monitoringRequestBus = new InMemoryBus("MonitoringRequestBus", watchSlowMsg: false);
            var monitoringQueue = new QueuedHandlerThreadPool(monitoringInnerBus, "MonitoringQueue", true, TimeSpan.FromMilliseconds(100));
            var monitoring = new MonitoringService(monitoringQueue,
                                                   monitoringRequestBus,
                                                   _mainQueue,
                                                   db.Config.WriterCheckpoint,
                                                   db.Config.Path,
                                                   vNodeSettings.StatsPeriod,
                                                   _nodeInfo.ExternalHttp,
                                                   vNodeSettings.StatsStorage);
            _mainBus.Subscribe(monitoringQueue.WidenFrom<SystemMessage.SystemInit, Message>());
            _mainBus.Subscribe(monitoringQueue.WidenFrom<SystemMessage.StateChangeMessage, Message>());
            _mainBus.Subscribe(monitoringQueue.WidenFrom<SystemMessage.BecomeShuttingDown, Message>());
            _mainBus.Subscribe(monitoringQueue.WidenFrom<SystemMessage.BecomeShutdown, Message>());
            _mainBus.Subscribe(monitoringQueue.WidenFrom<ClientMessage.WriteEventsCompleted, Message>());
            monitoringInnerBus.Subscribe<SystemMessage.SystemInit>(monitoring);
            monitoringInnerBus.Subscribe<SystemMessage.StateChangeMessage>(monitoring);
            monitoringInnerBus.Subscribe<SystemMessage.BecomeShuttingDown>(monitoring);
            monitoringInnerBus.Subscribe<SystemMessage.BecomeShutdown>(monitoring);
            monitoringInnerBus.Subscribe<ClientMessage.WriteEventsCompleted>(monitoring);
            monitoringInnerBus.Subscribe<MonitoringMessage.GetFreshStats>(monitoring);

            var truncPos = db.Config.TruncateCheckpoint.Read();
            if (truncPos != -1)
            {
                Log.Info("Truncate checkpoint is present. Truncate: {0} (0x{0:X}), Writer: {1} (0x{1:X}), Chaser: {2} (0x{2:X}), Epoch: {3} (0x{3:X})",
                         truncPos, db.Config.WriterCheckpoint.Read(), db.Config.ChaserCheckpoint.Read(), db.Config.EpochCheckpoint.Read());
                var truncator = new TFChunkDbTruncator(db.Config);
                truncator.TruncateDb(truncPos);
            }

            // STORAGE SUBSYSTEM
            db.Open(dbVerifyHashes);
            var indexPath = Path.Combine(db.Config.Path, "index");
            var readerPool = new ObjectPool<ITransactionFileReader>(
                "ReadIndex readers pool", ESConsts.PTableInitialReaderCount, ESConsts.PTableMaxReaderCount,
                () => new TFChunkReader(db, db.Config.WriterCheckpoint));
            var tableIndex = new TableIndex(indexPath,
                                            () => new HashListMemTable(maxSize: memTableEntryCount * 2),
                                            () => new TFReaderLease(readerPool),
                                            maxSizeForMemory: memTableEntryCount,
                                            maxTablesPerLevel: 2,
                                            inMem: db.Config.InMemDb);
	        var hash = new XXHashUnsafe();
			var readIndex = new ReadIndex(_mainQueue,
                                          readerPool,
                                          tableIndex,
                                          hash,
                                          ESConsts.StreamInfoCacheCapacity,
                                          Application.IsDefined(Application.AdditionalCommitChecks),
                                          Application.IsDefined(Application.InfiniteMetastreams) ? int.MaxValue : 1);
            var writer = new TFChunkWriter(db);
            var epochManager = new EpochManager(ESConsts.CachedEpochCount,
                                                db.Config.EpochCheckpoint,
                                                writer,
                                                initialReaderCount: 1,
                                                maxReaderCount: 5,
                                                readerFactory: () => new TFChunkReader(db, db.Config.WriterCheckpoint));
            epochManager.Init();

            var storageWriter = new ClusterStorageWriterService(_mainQueue, _mainBus, vNodeSettings.MinFlushDelay,
                                                                db, writer, readIndex.IndexWriter, epochManager,
                                                                () => readIndex.LastCommitPosition); // subscribes internally
            monitoringRequestBus.Subscribe<MonitoringMessage.InternalStatsRequest>(storageWriter);

            var storageReader = new StorageReaderService(_mainQueue, _mainBus, readIndex, ESConsts.StorageReaderThreadCount, db.Config.WriterCheckpoint);
            _mainBus.Subscribe<SystemMessage.SystemInit>(storageReader);
            _mainBus.Subscribe<SystemMessage.BecomeShuttingDown>(storageReader);
            _mainBus.Subscribe<SystemMessage.BecomeShutdown>(storageReader);
            monitoringRequestBus.Subscribe<MonitoringMessage.InternalStatsRequest>(storageReader);

            var chaser = new TFChunkChaser(db, db.Config.WriterCheckpoint, db.Config.ChaserCheckpoint);
            var storageChaser = new StorageChaser(_mainQueue, db.Config.WriterCheckpoint, chaser, readIndex.IndexCommitter, epochManager);
            _mainBus.Subscribe<SystemMessage.SystemInit>(storageChaser);
            _mainBus.Subscribe<SystemMessage.SystemStart>(storageChaser);
            _mainBus.Subscribe<SystemMessage.BecomeShuttingDown>(storageChaser);

            var storageScavenger = new StorageScavenger(db, tableIndex, hash, readIndex,
                                                        Application.IsDefined(Application.AlwaysKeepScavenged),
                                                        mergeChunks: !vNodeSettings.DisableScavengeMerging);

			// ReSharper disable RedundantTypeArgumentsOfMethod
            _mainBus.Subscribe<ClientMessage.ScavengeDatabase>(storageScavenger);
            // ReSharper restore RedundantTypeArgumentsOfMethod

            // AUTHENTICATION INFRASTRUCTURE - delegate to plugins
	        var authenticationProvider = vNodeSettings.AuthenticationProviderFactory.BuildAuthenticationProvider(_mainQueue, _mainBus, _workersHandler, _workerBuses);
	        Ensure.NotNull(authenticationProvider, "authenticationProvider");
		
            {
                // EXTERNAL TCP
                var extTcpService = new TcpService(_mainQueue, _nodeInfo.ExternalTcp, _workersHandler,
                                                   TcpServiceType.External, TcpSecurityType.Normal, new ClientTcpDispatcher(),
                                                   ESConsts.ExternalHeartbeatInterval, ESConsts.ExternalHeartbeatTimeout,
                                                   authenticationProvider, null);
                _mainBus.Subscribe<SystemMessage.SystemInit>(extTcpService);
                _mainBus.Subscribe<SystemMessage.SystemStart>(extTcpService);
                _mainBus.Subscribe<SystemMessage.BecomeShuttingDown>(extTcpService);

                // EXTERNAL SECURE TCP
                if (_nodeInfo.ExternalSecureTcp != null)
                {
                    var extSecTcpService = new TcpService(_mainQueue, _nodeInfo.ExternalSecureTcp, _workersHandler,
                                                          TcpServiceType.External, TcpSecurityType.Secure, new ClientTcpDispatcher(),
                                                          ESConsts.ExternalHeartbeatInterval, ESConsts.ExternalHeartbeatTimeout,
                                                          authenticationProvider, vNodeSettings.Certificate);
                    _mainBus.Subscribe<SystemMessage.SystemInit>(extSecTcpService);
                    _mainBus.Subscribe<SystemMessage.SystemStart>(extSecTcpService);
                    _mainBus.Subscribe<SystemMessage.BecomeShuttingDown>(extSecTcpService);
                }

                // INTERNAL TCP
                var intTcpService = new TcpService(_mainQueue, _nodeInfo.InternalTcp, _workersHandler,
                                                   TcpServiceType.Internal, TcpSecurityType.Normal,
                                                   new InternalTcpDispatcher(),
                                                   ESConsts.InternalHeartbeatInterval, ESConsts.InternalHeartbeatTimeout,
                                                   authenticationProvider, null);
                _mainBus.Subscribe<SystemMessage.SystemInit>(intTcpService);
                _mainBus.Subscribe<SystemMessage.SystemStart>(intTcpService);
                _mainBus.Subscribe<SystemMessage.BecomeShuttingDown>(intTcpService);

                // INTERNAL SECURE TCP
                if (_nodeInfo.InternalSecureTcp != null)
                {
                    var intSecTcpService = new TcpService(_mainQueue, _nodeInfo.InternalSecureTcp, _workersHandler,
                                                           TcpServiceType.Internal, TcpSecurityType.Secure,
                                                           new InternalTcpDispatcher(),
                                                           ESConsts.InternalHeartbeatInterval, ESConsts.InternalHeartbeatTimeout,
                                                           authenticationProvider, vNodeSettings.Certificate);
                    _mainBus.Subscribe<SystemMessage.SystemInit>(intSecTcpService);
                    _mainBus.Subscribe<SystemMessage.SystemStart>(intSecTcpService);
                    _mainBus.Subscribe<SystemMessage.BecomeShuttingDown>(intSecTcpService);
                }
            }

            SubscribeWorkers(bus =>
            {
                var tcpSendService = new TcpSendService();
                // ReSharper disable RedundantTypeArgumentsOfMethod
                bus.Subscribe<TcpMessage.TcpSend>(tcpSendService);
                // ReSharper restore RedundantTypeArgumentsOfMethod
            });

            var httpAuthenticationProviders = new List<HttpAuthenticationProvider>
            {
                new BasicHttpAuthenticationProvider(authenticationProvider),
            };
            if (vNodeSettings.EnableTrustedAuth)
                httpAuthenticationProviders.Add(new TrustedHttpAuthenticationProvider());
            httpAuthenticationProviders.Add(new AnonymousHttpAuthenticationProvider());

            var httpPipe = new HttpMessagePipe();
            var httpSendService = new HttpSendService(httpPipe, forwardRequests: true);
            _mainBus.Subscribe<SystemMessage.StateChangeMessage>(httpSendService);
            _mainBus.Subscribe(new WideningHandler<HttpMessage.SendOverHttp, Message>(_workersHandler));
            SubscribeWorkers(bus =>
            {
                bus.Subscribe<HttpMessage.HttpSend>(httpSendService);
                bus.Subscribe<HttpMessage.HttpSendPart>(httpSendService);
                bus.Subscribe<HttpMessage.HttpBeginSend>(httpSendService);
                bus.Subscribe<HttpMessage.HttpEndSend>(httpSendService);
                bus.Subscribe<HttpMessage.SendOverHttp>(httpSendService);
            });

            var adminController = new AdminController(_mainQueue);
            var pingController = new PingController();
            var statController = new StatController(monitoringQueue, _workersHandler);
            var atomController = new AtomController(httpSendService, _mainQueue, _workersHandler);
            var gossipController = new GossipController(_mainQueue, _workersHandler);
            var electController = new ElectController(_mainQueue);

            // HTTP SENDERS
            gossipController.SubscribeSenders(httpPipe);
            electController.SubscribeSenders(httpPipe);

            // EXTERNAL HTTP
            _externalHttpService = new HttpService(ServiceAccessibility.Public, _mainQueue, new TrieUriRouter(),
                                                    _workersHandler, vNodeSettings.HttpPrefixes);
            _externalHttpService.SetupController(adminController);
            _externalHttpService.SetupController(pingController);
            _externalHttpService.SetupController(statController);
            _externalHttpService.SetupController(atomController);
            _externalHttpService.SetupController(gossipController);
            
            _mainBus.Subscribe<SystemMessage.SystemInit>(_externalHttpService);
            _mainBus.Subscribe<SystemMessage.BecomeShuttingDown>(_externalHttpService);
            _mainBus.Subscribe<HttpMessage.PurgeTimedOutRequests>(_externalHttpService);

            // INTERNAL HTTP
            _internalHttpService = new HttpService(ServiceAccessibility.Private, _mainQueue, new TrieUriRouter(),
                                                    _workersHandler, _nodeInfo.InternalHttp.ToHttpUrl());
            _internalHttpService.SetupController(adminController);
            _internalHttpService.SetupController(pingController);
            _internalHttpService.SetupController(statController);
            _internalHttpService.SetupController(atomController);
            _internalHttpService.SetupController(gossipController);
            _internalHttpService.SetupController(electController);

			// Authentication plugin HTTP
	        vNodeSettings.AuthenticationProviderFactory.RegisterHttpControllers(_externalHttpService, _internalHttpService, httpSendService, _mainQueue, _workersHandler);

            _mainBus.Subscribe<SystemMessage.SystemInit>(_internalHttpService);
            _mainBus.Subscribe<SystemMessage.BecomeShuttingDown>(_internalHttpService);
            _mainBus.Subscribe<HttpMessage.PurgeTimedOutRequests>(_internalHttpService);

            SubscribeWorkers(bus =>
            {
                HttpService.CreateAndSubscribePipeline(bus, httpAuthenticationProviders.ToArray());
            });

            // REQUEST FORWARDING
            var forwardingService = new RequestForwardingService(_mainQueue, forwardingProxy, TimeSpan.FromSeconds(1));
            _mainBus.Subscribe<SystemMessage.SystemStart>(forwardingService);
            _mainBus.Subscribe<SystemMessage.RequestForwardingTimerTick>(forwardingService);
            _mainBus.Subscribe<ClientMessage.NotHandled>(forwardingService);
            _mainBus.Subscribe<ClientMessage.WriteEventsCompleted>(forwardingService);
            _mainBus.Subscribe<ClientMessage.TransactionStartCompleted>(forwardingService);
            _mainBus.Subscribe<ClientMessage.TransactionWriteCompleted>(forwardingService);
            _mainBus.Subscribe<ClientMessage.TransactionCommitCompleted>(forwardingService);
            _mainBus.Subscribe<ClientMessage.DeleteStreamCompleted>(forwardingService);

            // REQUEST MANAGEMENT
            var requestManagement = new RequestManagementService(_mainQueue,
                                                                 vNodeSettings.PrepareAckCount,
                                                                 vNodeSettings.CommitAckCount,
                                                                 vNodeSettings.PrepareTimeout,
                                                                 vNodeSettings.CommitTimeout);
            _mainBus.Subscribe<SystemMessage.SystemInit>(requestManagement);
            _mainBus.Subscribe<ClientMessage.WriteEvents>(requestManagement);
            _mainBus.Subscribe<ClientMessage.TransactionStart>(requestManagement);
            _mainBus.Subscribe<ClientMessage.TransactionWrite>(requestManagement);
            _mainBus.Subscribe<ClientMessage.TransactionCommit>(requestManagement);
            _mainBus.Subscribe<ClientMessage.DeleteStream>(requestManagement);
            _mainBus.Subscribe<StorageMessage.RequestCompleted>(requestManagement);
            _mainBus.Subscribe<StorageMessage.CheckStreamAccessCompleted>(requestManagement);
            _mainBus.Subscribe<StorageMessage.AlreadyCommitted>(requestManagement);
            _mainBus.Subscribe<StorageMessage.CommitAck>(requestManagement);
            _mainBus.Subscribe<StorageMessage.PrepareAck>(requestManagement);
            _mainBus.Subscribe<StorageMessage.WrongExpectedVersion>(requestManagement);
            _mainBus.Subscribe<StorageMessage.InvalidTransaction>(requestManagement);
            _mainBus.Subscribe<StorageMessage.StreamDeleted>(requestManagement);
            _mainBus.Subscribe<StorageMessage.RequestManagerTimerTick>(requestManagement);

            // SUBSCRIPTIONS
            var subscrBus = new InMemoryBus("SubscriptionsBus", true, TimeSpan.FromMilliseconds(50));
            var subscrQueue = new QueuedHandlerThreadPool(subscrBus, "Subscriptions", false);
            _mainBus.Subscribe(subscrQueue.WidenFrom<SystemMessage.SystemStart, Message>());
            _mainBus.Subscribe(subscrQueue.WidenFrom<SystemMessage.BecomeShuttingDown, Message>());
            _mainBus.Subscribe(subscrQueue.WidenFrom<TcpMessage.ConnectionClosed, Message>());
            _mainBus.Subscribe(subscrQueue.WidenFrom<ClientMessage.SubscribeToStream, Message>());
            _mainBus.Subscribe(subscrQueue.WidenFrom<ClientMessage.UnsubscribeFromStream, Message>());
            _mainBus.Subscribe(subscrQueue.WidenFrom<SubscriptionMessage.PollStream, Message>());
            _mainBus.Subscribe(subscrQueue.WidenFrom<SubscriptionMessage.CheckPollTimeout, Message>());
            _mainBus.Subscribe(subscrQueue.WidenFrom<StorageMessage.EventCommited, Message>());

            var subscription = new SubscriptionsService(_mainQueue, subscrQueue, readIndex);
            subscrBus.Subscribe<SystemMessage.SystemStart>(subscription);
            subscrBus.Subscribe<SystemMessage.BecomeShuttingDown>(subscription);
            subscrBus.Subscribe<TcpMessage.ConnectionClosed>(subscription);
            subscrBus.Subscribe<ClientMessage.SubscribeToStream>(subscription);
            subscrBus.Subscribe<ClientMessage.UnsubscribeFromStream>(subscription);
            subscrBus.Subscribe<SubscriptionMessage.PollStream>(subscription);
            subscrBus.Subscribe<SubscriptionMessage.CheckPollTimeout>(subscription);
            subscrBus.Subscribe<StorageMessage.EventCommited>(subscription);

            // TIMER
            _timeProvider = new RealTimeProvider();
            _timerService = new TimerService(new ThreadBasedScheduler(_timeProvider));
            _mainBus.Subscribe<SystemMessage.BecomeShutdown>(_timerService);
            _mainBus.Subscribe<TimerMessage.Schedule>(_timerService);

            // MASTER REPLICATION
            var masterReplicationService = new MasterReplicationService(_mainQueue, _nodeInfo.InstanceId, db, _workersHandler,
                                                                        epochManager, vNodeSettings.ClusterNodeCount);
            _mainBus.Subscribe<SystemMessage.SystemStart>(masterReplicationService);
            _mainBus.Subscribe<SystemMessage.StateChangeMessage>(masterReplicationService);
            _mainBus.Subscribe<ReplicationMessage.ReplicaSubscriptionRequest>(masterReplicationService);
            _mainBus.Subscribe<ReplicationMessage.ReplicaLogPositionAck>(masterReplicationService);

            // REPLICA REPLICATION
            var replicaService = new ReplicaService(_mainQueue, db, epochManager, _workersHandler, authenticationProvider,
                                                    _nodeInfo, vNodeSettings.UseSsl, vNodeSettings.SslTargetHost, vNodeSettings.SslValidateServer);
            _mainBus.Subscribe<SystemMessage.StateChangeMessage>(replicaService);
            _mainBus.Subscribe<ReplicationMessage.ReconnectToMaster>(replicaService);
            _mainBus.Subscribe<ReplicationMessage.SubscribeToMaster>(replicaService);
            _mainBus.Subscribe<ReplicationMessage.AckLogPosition>(replicaService);
            _mainBus.Subscribe<StorageMessage.PrepareAck>(replicaService);
            _mainBus.Subscribe<StorageMessage.CommitAck>(replicaService);
            _mainBus.Subscribe<ClientMessage.TcpForwardMessage>(replicaService);

            // ELECTIONS
            var electionsService = new ElectionsService(_mainQueue, _nodeInfo, vNodeSettings.ClusterNodeCount,
                                                        db.Config.WriterCheckpoint, db.Config.ChaserCheckpoint,
                                                        epochManager, () => readIndex.LastCommitPosition, vNodeSettings.NodePriority);
            electionsService.SubscribeMessages(_mainBus);

            // GOSSIP
            var gossip = new NodeGossipService(_mainQueue, gossipSeedSource, _nodeInfo, db.Config.WriterCheckpoint,
											   db.Config.ChaserCheckpoint, epochManager, () => readIndex.LastCommitPosition,
                                               vNodeSettings.NodePriority);
            _mainBus.Subscribe<SystemMessage.SystemInit>(gossip);
            _mainBus.Subscribe<GossipMessage.RetrieveGossipSeedSources>(gossip);
            _mainBus.Subscribe<GossipMessage.GotGossipSeedSources>(gossip);
            _mainBus.Subscribe<GossipMessage.Gossip>(gossip);
            _mainBus.Subscribe<GossipMessage.GossipReceived>(gossip);
            _mainBus.Subscribe<SystemMessage.StateChangeMessage>(gossip);
            _mainBus.Subscribe<GossipMessage.GossipSendFailed>(gossip);
            _mainBus.Subscribe<SystemMessage.VNodeConnectionEstablished>(gossip);
            _mainBus.Subscribe<SystemMessage.VNodeConnectionLost>(gossip);

            _workersHandler.Start();
            _mainQueue.Start();
            monitoringQueue.Start();
            subscrQueue.Start();

            if (subsystems != null)
            {
                foreach (var subsystem in subsystems)
                {
                    subsystem.Register(db, _mainQueue, _mainBus, _timerService, _timeProvider,
                                       httpSendService, new[] { _internalHttpService, _externalHttpService }, _workersHandler);
                }
            }
        }