public static async Task <IFdbDatabase> OpenNamedPartitionAsync(string clusterFile, string dbName, [NotNull] IEnumerable <string> path, bool readOnly, CancellationToken ct) { if (path == null) { throw new ArgumentNullException(nameof(path)); } var partitionPath = path.ToList(); if (partitionPath.Count == 0) { throw new ArgumentException("The path to the named partition cannot be empty", nameof(path)); } // looks at the global partition table for the specified named partition // By convention, all named databases will be under the "/Databases" folder FdbDatabase db = null; var rootSpace = KeySubspace.Empty; try { db = await Fdb.OpenInternalAsync(clusterFile, dbName, rootSpace, readOnly : false, ct : ct).ConfigureAwait(false); var rootLayer = FdbDirectoryLayer.Create(rootSpace); if (Logging.On) { Logging.Verbose(typeof(Fdb.Directory), "OpenNamedPartitionAsync", $"Opened root layer of database {db.Name} using cluster file '{db.Cluster.Path}'"); } // look up in the root layer for the named partition var descriptor = await rootLayer.CreateOrOpenAsync(db, partitionPath, layer : FdbDirectoryPartition.LayerId, ct : ct).ConfigureAwait(false); if (Logging.On) { Logging.Verbose(typeof(Fdb.Directory), "OpenNamedPartitionAsync", $"Found named partition '{descriptor.FullName}' at prefix {descriptor}"); } // we have to chroot the database to the new prefix, and create a new DirectoryLayer with a new '/' rootSpace = descriptor.Copy(); //note: create a copy of the key //TODO: find a nicer way to do that! db.ChangeRoot(rootSpace, FdbDirectoryLayer.Create(rootSpace, partitionPath), readOnly); if (Logging.On) { Logging.Info(typeof(Fdb.Directory), "OpenNamedPartitionAsync", $"Opened partition {descriptor.FullName} at {db.GlobalSpace}, using directory layer at {db.Directory.DirectoryLayer.NodeSubspace}"); } return(db); } catch (Exception e) { db?.Dispose(); if (Logging.On) { Logging.Exception(typeof(Fdb.Directory), "OpenNamedPartitionAsync", e); } throw; } }
internal static async Task <FdbDatabase> OpenInternalAsync(string clusterFile, string dbName, IFdbSubspace globalSpace, bool readOnly, CancellationToken cancellationToken) { cancellationToken.ThrowIfCancellationRequested(); dbName = dbName ?? "DB"; globalSpace = globalSpace ?? FdbSubspace.Empty; if (Logging.On) { Logging.Info(typeof(Fdb), "OpenAsync", String.Format("Connecting to database '{0}' using cluster file '{1}' and subspace '{2}' ...", dbName, clusterFile, globalSpace)); } FdbCluster cluster = null; FdbDatabase db = null; bool success = false; try { cluster = await CreateClusterInternalAsync(clusterFile, cancellationToken).ConfigureAwait(false); //note: since the cluster is not provided by the caller, link it with the database's Dispose() db = await cluster.OpenDatabaseInternalAsync(dbName, globalSpace, readOnly : readOnly, ownsCluster : true, cancellationToken : cancellationToken).ConfigureAwait(false); success = true; return(db); } finally { if (!success) { // cleanup the cluter if something went wrong if (db != null) { db.Dispose(); } if (cluster != null) { cluster.Dispose(); } } } }
internal static async Task <IFdbDatabase> OpenInternalAsync(FdbConnectionOptions options, CancellationToken ct) { Contract.Requires(options != null); ct.ThrowIfCancellationRequested(); string clusterFile = options.ClusterFile; string dbName = options.DbName ?? FdbConnectionOptions.DefaultDbName; // new FdbConnectionOptions { GlobalSpace = bool readOnly = options.ReadOnly; IKeySubspace globalSpace = options.GlobalSpace ?? KeySubspace.Empty; string[] partitionPath = options.PartitionPath?.ToArray(); bool hasPartition = partitionPath != null && partitionPath.Length > 0; if (Logging.On) { Logging.Info(typeof(Fdb), nameof(OpenInternalAsync), $"Connecting to database '{dbName}' using cluster file '{clusterFile}' and subspace '{globalSpace}' ..."); } FdbCluster cluster = null; FdbDatabase db = null; bool success = false; try { cluster = await CreateClusterInternalAsync(clusterFile, ct).ConfigureAwait(false); //note: since the cluster is not provided by the caller, link it with the database's Dispose() db = await cluster.OpenDatabaseInternalAsync(dbName, globalSpace, readOnly : !hasPartition && readOnly, ownsCluster : true, ct : ct).ConfigureAwait(false); // set the default options if (options.DefaultTimeout != TimeSpan.Zero) { db.DefaultTimeout = checked ((int)Math.Ceiling(options.DefaultTimeout.TotalMilliseconds)); } if (options.DefaultRetryLimit != 0) { db.DefaultRetryLimit = options.DefaultRetryLimit; } if (options.DefaultMaxRetryDelay != 0) { db.DefaultMaxRetryDelay = options.DefaultMaxRetryDelay; } if (hasPartition) { // open the partition, and switch the root of the db await Fdb.Directory.SwitchToNamedPartitionAsync(db, partitionPath, readOnly, ct); } success = true; return(db); } finally { if (!success) { // cleanup the cluter if something went wrong db?.Dispose(); cluster?.Dispose(); } } }