protected Processor(DbController controller, string hostString)
{
this.hostString = hostString;
dbInterfaces = new Dictionary<string, DatabaseInterface>();
this.controller = controller;
state = 0;
authenticationTries = 0;
dbCallback = OnDatabaseEvent;
}
internal DbSystem(DbController controller, string name, IDbConfig config, IDatabase database)
{
this.name = name;
this.controller = controller;
this.config = config;
this.Database = database;
internalCounter = 0;
// Register the shut down delegate,
database.Context.OnShutdown += new EventHandler(Shutdown);
// Enable commands to the database system...
database.Context.IsExecutingCommands = true;
}
public DefaultLocalBootable(DbController controller, string databaseName)
{
this.controller = controller;
this.databaseName = databaseName;
}
// ---------- Private methods ----------
/// <summary>
/// Disposes of all the resources associated with this system.
/// </summary>
/// <remarks>
/// It may only be called from the shutdown delegate registered
/// in the constructor.
/// </remarks>
private void InternalDispose()
{
if (connections != null && connections.Count > 0) {
ArrayList list = new ArrayList(connections.Keys);
for (int i = list.Count - 1; i >= 0; i--) {
int id = (int) list[i];
IDbConnection connection = connections[id] as IDbConnection;
try {
if (connection != null)
connection.Dispose();
} catch(Exception) {
// we ignore this ...
}
}
}
connections = null;
controller = null;
config = null;
}
public DatabaseShutdownCallback(DbController controller, IDatabase database)
{
this.controller = controller;
this.database = database;
}
/// <summary>
/// Creates a new instance of <see cref="DbController"/> to the
/// given path on the underlying filesystem.
/// </summary>
/// <param name="config">The initial configurations that will
/// be applied to the subsequent databases within the context.</param>
/// <remarks>
/// If the given path doesn't point to any valid database context
/// this will generate it by creating a configuration file which
/// will encapsulate all the default configurations and those
/// provided in this method.
/// </remarks>
/// <returns>
/// Returns an instance of <see cref="DbController"/> which points
/// to the given path.
/// </returns>
public static DbController Create(IDbConfig config)
{
StorageType storageType = GetStorageType(config);
if (config == null)
config = DbConfig.Default;
IDbConfig mainConfig;
if (storageType == StorageType.File) {
string path = config.BasePath() ?? Environment.CurrentDirectory;
string configFile = Path.GetFileName(path);
// we only allow the file extension .conf
string ext = Path.GetExtension(configFile);
if (String.Compare(ext, FileExtension, StringComparison.OrdinalIgnoreCase) == 0) {
path = Path.GetDirectoryName(path);
} else {
configFile = DefaultConfigFileName;
}
// if the directory doesn't exist we will create one...
if (path != null && !Directory.Exists(path))
Directory.CreateDirectory(path);
mainConfig = GetConfig(config, path, configFile);
mainConfig.BasePath(path);
} else {
mainConfig = config;
}
var controller = new DbController(mainConfig);
if (storageType == StorageType.File) {
// done with the main configuration... now look for the databases...
string path = config.BasePath();
string[] subDirs = Directory.GetDirectories(path);
foreach (string dir in subDirs) {
IDbConfig dbConfig = GetConfig(mainConfig, dir, null);
if (dbConfig == null)
continue;
var dbPath = dir.Substring(dir.LastIndexOf(Path.DirectorySeparatorChar) + 1);
string name = dbConfig.DatabaseName();
if (name == null)
name = dbPath;
dbConfig.DatabasePath(dbPath);
if (controller.IsDatabaseRegistered(name))
throw new InvalidOperationException("The database '" + name + "' was already registered.");
IDatabase database = CreateDatabase(dbConfig, name);
controller.databases[name] = database;
if (database.Exists) {
var callback = new DatabaseShutdownCallback(controller, database);
database.Context.OnShutdown += (callback.Execute);
}
}
}
return controller;
}
public LocalSystem(DbController controller)
{
Controller = controller;
}