public void Stop() { // Check point before we stop CheckPoint(); lock (lockObject) { // We can't stop a database that hasn't started if (databaseStarted == false || treeSystem == null) { return; } // Close the store fileStore.Close(); // Stop the buffer manager bufferManager.Stop(); // Offer up all the internal objects to the GC bufferManager = null; fileStore = null; // Clear the internal state treeSystem = null; databaseStarted = false; } }
internal JournaledFileStore(string resourceName, LoggingBufferManager bufferManager, bool readOnly) : base(readOnly) { this.bufferManager = bufferManager; resource = bufferManager.CreateResource(resourceName); }
private void Dispose(bool disposing) { if (disposing) { if (bufferManager != null) { try { // Set a check point SetCheckPoint(); // Stop the buffer manager bufferManager.Stop(); bufferManager.Dispose(); } catch (IOException e) { // TODO: log the issue } } if (lockFile != null) lockFile.Close(); } bufferManager = null; lockFile = null; context = null; }
public bool Start() { lock (lockObject) { // We can't start a database that is already started, if (databaseStarted || treeSystem != null) { return(false); } // Make a data.koi file with a single TreeSystem structure mapped into it const string fileExt = "cdb"; const string dbFileName = "data"; bufferManager = new LoggingBufferManager(path, path, false, maxPageCount, pageSize, fileExt, fileRolloverSize, logger, true); bufferManager.Start(); // The backing store fileStore = new JournalledFileStore(dbFileName, bufferManager, false); fileStore.Open(); // The actual database StoreTreeSystem treeStore; // Get the header area IArea headerArea = fileStore.GetArea(-1); int magicValue = headerArea.ReadInt4(); // If header area magic value is zero, then we assume this is a brand // new database and initialize it with the configuration information // given. if (magicValue == 0) { // Create a tree store inside the file store, treeStore = new StoreTreeSystem(fileStore, branchNodeSize, leafNodeSize, heapNodeCacheSize, branchNodeCacheSize); // Create the tree and returns a pointer to the tree, long treePointer = treeStore.Create(); // Create an area object with state information about the tree IAreaWriter awriter = fileStore.CreateArea(128); awriter.WriteInt4(0x0101); // The version value awriter.WriteInt8(treePointer); awriter.WriteInt4(branchNodeSize); awriter.WriteInt4(leafNodeSize); awriter.Finish(); long dummy = awriter.Id; IMutableArea harea = fileStore.GetMutableArea(-1); harea.WriteInt4(0x092BA001); // The magic value harea.WriteInt8(awriter.Id); harea.CheckOut(); } else if (magicValue == 0x092BA001) { long apointer = headerArea.ReadInt8(); // The area that contains configuration details, IArea initArea = fileStore.GetArea(apointer); int version = initArea.ReadInt4(); if (version != 0x0101) { throw new IOException("Unknown version in tree initialization area"); } // Read the pointer to the tree store long treePointer = initArea.ReadInt8(); // Read the branch and leaf node sizes as set when the database was // created. int ibranchNodeSize = initArea.ReadInt4(); int ileafNodeSize = initArea.ReadInt4(); // Create the tree store treeStore = new StoreTreeSystem(fileStore, ibranchNodeSize, ileafNodeSize, heapNodeCacheSize, branchNodeCacheSize); // Initialize the tree treeStore.Init(treePointer); } else { throw new IOException("Data is corrupt, invalid magic value in store"); } // Set the point of the tree store treeStore.CheckPoint(); // Set up final internal state and return true treeSystem = treeStore; databaseStarted = true; return(true); } }
private void Configure() { var configuration = context.ResolveService<IConfiguration>(); if (configuration == null) throw new InvalidOperationException("Could not find any configuration in context"); var dataFactoryName = configuration.GetString("store.journaled.dataFactory", "scattering"); var dataFactory = context.ResolveService<IStoreDataFactory>(dataFactoryName); if (dataFactory == null) throw new ArgumentException(String.Format("The data factory '{0}' could not be resolved in this context.", dataFactoryName)); var maxPages = configuration.GetInt32("store.journaled.maxPages", DefaultMaxPages); var pageSize = configuration.GetInt32("store.journaled.pageSize", DefaultPageSize); var fsName = configuration.GetString("store.journaled.fileSystem"); if (String.IsNullOrEmpty(fsName)) fsName = configuration.GetString("store.fileSystem", "local"); FileSystem = context.ResolveService<IFileSystem>(fsName); if (FileSystem == null) throw new DatabaseConfigurationException(String.Format("The file-system '{0}' is not found in this context.", fsName)); var journalPath = configuration.GetString("store.journaled.journalPath"); if (String.IsNullOrEmpty(journalPath)) { var dbName = configuration.GetString("database.name"); var dbPath = configuration.GetString("database.path"); if (String.IsNullOrEmpty(dbPath)) throw new DatabaseConfigurationException("Unable to determine the journal path"); journalPath = FileSystem.CombinePath(dbPath, "journals"); } if (!FileSystem.DirectoryExists(journalPath)) FileSystem.CreateDirectory(journalPath); ReadOnly = configuration.GetBoolean("database.readOnly", false); bufferManager = new LoggingBufferManager(context, FileSystem, journalPath, dataFactory, pageSize, maxPages, ReadOnly); bufferManager.Start(); }