public PythonTypeDatabase(
PythonInterpreterFactoryWithDatabase factory,
IEnumerable<string> databaseDirectories = null,
PythonTypeDatabase innerDatabase = null
) {
if (innerDatabase != null && factory.Configuration.Version != innerDatabase.LanguageVersion) {
throw new InvalidOperationException("Language versions do not match");
}
_factory = factory;
if (innerDatabase != null) {
_sharedState = new SharedDatabaseState(innerDatabase._sharedState);
} else {
_sharedState = new SharedDatabaseState(_factory.Configuration.Version);
}
if (databaseDirectories != null) {
foreach (var d in databaseDirectories) {
LoadDatabase(d);
}
}
_sharedState.ListenForCorruptDatabase(this);
}
public PythonTypeDatabase CloneWithNewBuiltins(IBuiltinPythonModule newBuiltins) {
var newDb = new PythonTypeDatabase(_factory, null, this);
newDb._sharedState.BuiltinModule = newBuiltins;
return newDb;
}
public ExtensionModuleLoader(PythonTypeDatabase typeDb, IPythonInterpreterFactory factory, string moduleName, string extensionFilename, CancellationToken cancel) {
_typeDb = typeDb;
_factory = factory;
_moduleName = moduleName;
_extensionFilename = extensionFilename;
_cancel = cancel;
}
/// <summary>
/// Called to manually trigger a refresh of <see cref="IsCurrent"/>.
/// After completion, <see cref="IsCurrentChanged"/> will always be
/// raised, regardless of whether the values were changed.
/// </summary>
public virtual void RefreshIsCurrent()
{
lock (_isCurrentLock) {
try {
_isCheckingDatabase = true;
OnIsCurrentChanged();
_generating = PythonTypeDatabase.IsDatabaseRegenerating(DatabasePath);
WatchingLibrary = !_generating;
if (_generating)
{
// Skip the rest of the checks, because we know we're
// not current.
}
else if (!PythonTypeDatabase.IsDatabaseVersionCurrent(DatabasePath))
{
_isValid = false;
_missingModules = null;
_isCurrentException = null;
}
else
{
_isValid = true;
HashSet <string> existingDatabase = null;
string[] missingModules = null;
for (int retries = 3; retries > 0; --retries)
{
try {
existingDatabase = GetExistingDatabase(DatabasePath);
break;
} catch (UnauthorizedAccessException) {
} catch (IOException) {
}
Thread.Sleep(100);
}
if (existingDatabase == null)
{
// This will either succeed or throw again. If it throws
// then the error is reported to the user.
existingDatabase = GetExistingDatabase(DatabasePath);
}
for (int retries = 3; retries > 0; --retries)
{
try {
missingModules = GetMissingModules(existingDatabase);
break;
} catch (UnauthorizedAccessException) {
} catch (IOException) {
}
Thread.Sleep(100);
}
if (missingModules == null)
{
// This will either succeed or throw again. If it throws
// then the error is reported to the user.
missingModules = GetMissingModules(existingDatabase);
}
if (missingModules.Length > 0)
{
var oldModules = _missingModules;
if (oldModules == null ||
oldModules.Length != missingModules.Length ||
!oldModules.SequenceEqual(missingModules))
{
}
_missingModules = missingModules;
}
else
{
_missingModules = null;
}
}
_isCurrentException = null;
} catch (Exception ex) {
// Report the exception text as the reason.
_isCurrentException = ex.ToString();
_missingModules = null;
} finally {
_isCheckingDatabase = false;
}
}
OnIsCurrentChanged();
}
/// <summary>
/// Creates a new interpreter factory with the specified database. This
/// factory is suitable for analysis, but not execution.
/// </summary>
public static PythonInterpreterFactoryWithDatabase CreateAnalysisInterpreterFactory(
Version languageVersion,
PythonTypeDatabase database) {
return new AnalysisOnlyInterpreterFactory(languageVersion, database);
}
/// <summary>
/// Clears any cached type databases and raises the
/// <see cref="NewDatabaseAvailable"/> event.
/// </summary>
protected void OnNewDatabaseAvailable() {
_typeDb = null;
_typeDbWithoutPackages = null;
var evt = NewDatabaseAvailable;
if (evt != null) {
evt(this, EventArgs.Empty);
}
}
/// <summary>
/// Returns the database for this factory. This database may be shared
/// between callers and should be cloned before making modifications.
///
/// This function never returns null.
/// </summary>
public PythonTypeDatabase GetCurrentDatabase() {
if (_typeDb == null || _typeDb.DatabaseDirectory != DatabasePath) {
_typeDb = MakeTypeDatabase(DatabasePath) ??
PythonTypeDatabase.CreateDefaultTypeDatabase(this);
}
return _typeDb;
}
/// <summary>
/// Creates a new interpreter factory with the specified database. This
/// factory is suitable for analysis, but not execution.
/// </summary>
public static PythonInterpreterFactoryWithDatabase CreateAnalysisInterpreterFactory(
Version languageVersion,
PythonTypeDatabase database)
{
return(new AnalysisOnlyInterpreterFactory(languageVersion, database));
}
public DatabaseReplacedEventArgs(PythonTypeDatabase newDatabase) {
_newDatabase = newDatabase;
}
/// <summary>
/// Sets up a weak reference for notification of when the shared database
/// has become corrupted. Doesn't keep the listening database alive.
/// </summary>
public void ListenForCorruptDatabase(PythonTypeDatabase db) {
lock (_corruptListeners) {
for (int i = 0; i < _corruptListeners.Count; i++) {
var target = _corruptListeners[i].Target;
if (target == null) {
_corruptListeners[i].Target = db;
return;
}
}
_corruptListeners.Add(new WeakReference(db));
}
}
