/// <summary>
///
/// </summary>
/// <param name="dbPath">dbFilePath must point to the DIT file on the local computer.</param>
/// <param name="logPath">The path should point to a writeable folder on the local computer, where ESE log files will be created. If not specified, then temp folder will be used.</param>
public DirectoryContext(string dbFilePath, bool readOnly, string logDirectoryPath = null)
{
if (!File.Exists(dbFilePath))
{
// TODO: Extract as resource
throw new FileNotFoundException("The specified database file does not exist.", dbFilePath);
}
int pageSize = DirectoryContext.GetDBPageSize(dbFilePath);
string dbDirectoryPath = Path.GetDirectoryName(dbFilePath);
string checkpointDirectoryPath = dbDirectoryPath;
string tempDirectoryPath = dbDirectoryPath;
if (logDirectoryPath != null)
{
if (!Directory.Exists(logDirectoryPath))
{
// TODO: Extract as resource
throw new FileNotFoundException("The specified log directory does not exist.", logDirectoryPath);
}
}
else
{
logDirectoryPath = dbDirectoryPath;
}
// TODO: Exception handling?
// HACK: IsamInstance constructor throws AccessDenied Exception when the path does not end with a backslash.
// TODO: Const isam instance name
string instanceName = "DSInternals";
this.instance = new IsamInstance(AddPathSeparator(checkpointDirectoryPath), AddPathSeparator(logDirectoryPath), AddPathSeparator(tempDirectoryPath), ADConstants.EseBaseName, instanceName, readOnly, pageSize);
try
{
var isamParameters = this.instance.IsamSystemParameters;
// TODO: Add param explanations
isamParameters.LogFileSize = ADConstants.EseLogFileSize;
isamParameters.DeleteOutOfRangeLogs = true;
isamParameters.EnableIndexChecking = 1;
isamParameters.EnableIndexCleanup = true;
isamParameters.CircularLog = true;
// TODO: Configure additional ISAM parameters
// this.instance.IsamSystemParameters.EnableOnlineDefrag = false;
// JET_paramDeleteOldLogs = 1
this.session = this.instance.CreateSession();
this.session.AttachDatabase(dbFilePath);
this.attachedDatabasePath = dbFilePath;
this.database = this.session.OpenDatabase(dbFilePath);
this.Schema = new DirectorySchema(this.database);
this.SecurityDescriptorRersolver = new SecurityDescriptorRersolver(this.database);
this.DistinguishedNameResolver = new DistinguishedNameResolver(this.database, this.Schema);
this.LinkResolver = new LinkResolver(this.database, this.Schema);
this.DomainController = new DomainController(this);
}
catch
{
// Free resources if anything failed
this.Dispose();
throw;
}
}
/// <summary>
/// Initializes a new instance of the <see cref="IsamSession"/> class.
/// </summary>
/// <param name="isamInstance">The instance.</param>
internal IsamSession(IsamInstance isamInstance)
{
lock (isamInstance)
{
this.isamInstance = isamInstance;
Api.JetBeginSession(isamInstance.Inst, out this.sesid, null, null);
this.cleanup = true;
this.transactionLevelID = new long[7]; // JET only supports 7 levels
}
}
/// <summary>
/// Initializes a new instance of the <see cref="IsamSession"/> class.
/// </summary>
/// <param name="isamInstance">The instance.</param>
internal IsamSession(IsamInstance isamInstance)
{
lock (isamInstance)
{
this.isamInstance = isamInstance;
Api.JetBeginSession(isamInstance.Inst, out this.sesid, null, null);
this.cleanup = true;
this.transactionLevelID = new long[7]; // JET only supports 7 levels
}
}
/// <summary>
/// Initializes a new instance of the <see cref="IsamSystemParameters"/> class.
/// </summary>
/// <param name="instance">The instance.</param>
internal IsamSystemParameters(IsamInstance instance)
{
this.instance = instance;
}
protected virtual void Dispose(bool disposing)
{
if (!disposing)
{
// Do nothing
return;
}
if(this.LinkResolver != null)
{
this.LinkResolver.Dispose();
this.LinkResolver = null;
}
if (this.SecurityDescriptorRersolver != null)
{
this.SecurityDescriptorRersolver.Dispose();
this.SecurityDescriptorRersolver = null;
}
if (this.DistinguishedNameResolver != null)
{
this.DistinguishedNameResolver.Dispose();
this.DistinguishedNameResolver = null;
}
if (this.DomainController != null)
{
this.DomainController.Dispose();
this.DomainController = null;
}
if (this.database != null)
{
this.database.Dispose();
this.database = null;
}
if (this.session != null)
{
if (this.attachedDatabasePath != null)
{
this.session.DetachDatabase(this.attachedDatabasePath);
this.attachedDatabasePath = null;
}
this.session.Dispose();
this.session = null;
}
if (this.instance != null)
{
this.instance.Dispose();
this.instance = null;
}
}
/// <summary>
/// Initializes a new instance of the <see cref="IsamSystemParameters"/> class.
/// </summary>
/// <param name="instance">The instance.</param>
internal IsamSystemParameters(IsamInstance instance)
{
this.instance = instance;
}