Exemple #1
0
        internal void EnsureLoaded()
        {
#if FALSE
            // If we're fully loaded, just return.
            if (_loadState == LoadState.Loaded)
            {
                return;
            }

            // If we're loading or not loaded, we need to take this lock.
            if (!_typeDb.BeginModuleLoad(this, 10000))
            {
                Debug.Fail("Timeout loading {0}", _modName);
                //throw new InvalidOperationException("Cannot load module at this time");
                return;
            }

            try {
                // Ensure we haven't started/finished loading while waiting
                if (_loadState != LoadState.NotLoaded)
                {
                    return;
                }

                // Mark as loading now (before it completes), if we have circular
                // references we'll fix them up after loading
                // completes.
                _loadState = LoadState.Loading;

                using (var stream = new FileStream(_dbFile, FileMode.Open, FileAccess.Read, FileShare.Read)) {
                    Dictionary <string, object> contents = null;
                    try {
                        contents = (Dictionary <string, object>)Unpickle.Load(stream);
                    } catch (ArgumentException) {
                        _typeDb.OnDatabaseCorrupt();
                    } catch (InvalidOperationException) {
                        // Bug 511 - http://pytools.codeplex.com/workitem/511
                        // Ignore a corrupt database file.
                        _typeDb.OnDatabaseCorrupt();
                    }

                    if (contents != null)
                    {
                        LoadModule(contents);
                    }
                }
            } catch (FileNotFoundException) {
                // if the file got deleted before we've loaded it don't crash...
            } catch (IOException) {
                // or if someone has locked the file for some reason, also don't crash...
            } finally {
                // Regardless of how we finish, mark us as loaded so we don't
                // try again.
                _loadState = LoadState.Loaded;
                _typeDb.EndModuleLoad(this);
            }
#endif
        }
Exemple #2
0
        internal void EnsureLoaded()
        {
            // If we're fully loaded, just return.
            if (_loadState == LoadState.Loaded)
            {
                return;
            }

            // If we're loading or not loaded, we need to take this lock.
            if (!_typeDb.BeginModuleLoad(this, 10000))
            {
                Debug.Fail(string.Format("Timeout loading {0}", _modName));
                //throw new InvalidOperationException("Cannot load module at this time");
                return;
            }

            try {
                // Ensure we haven't started/finished loading while waiting
                if (_loadState != LoadState.NotLoaded)
                {
                    return;
                }

                // Mark as loading now (before it completes), if we have circular
                // references we'll fix them up after loading
                // completes.
                _loadState = LoadState.Loading;

                // Will be set to true if we should delete this file and then
                // trigger a corruption notification.
                bool deleteFile = false;

                using (var stream = new FileStream(_dbFile, FileMode.Open, FileAccess.Read, FileShare.Read)) {
                    Dictionary <string, object> contents = null;
                    try {
                        contents = (Dictionary <string, object>)Unpickle.Load(stream);
                    } catch (ArgumentException) {
                        _typeDb.OnDatabaseCorrupt();
                    } catch (InvalidOperationException) {
                        // Bug 511 - http://pytools.codeplex.com/workitem/511
                        // Ignore a corrupt database file.
                        _typeDb.OnDatabaseCorrupt();
                    }

                    if (contents != null)
                    {
                        object obj;
                        string filename;
                        if (contents.TryGetValue("filename", out obj))
                        {
                            filename = obj as string;
                            if (!string.IsNullOrEmpty(filename) && !File.Exists(filename))
                            {
                                // Issue 2358 - must refresh DB after it moves
                                // on disk.
                                deleteFile = true;
                            }
                        }

                        LoadModule(contents);
                    }
                }

                if (deleteFile)
                {
                    // Only notify if we actually remove the file
                    try {
                        File.Delete(_dbFile);
                        _typeDb.OnDatabaseCorrupt();
                    } catch (IOException) {
                    } catch (UnauthorizedAccessException) {
                    }
                }
            } catch (FileNotFoundException) {
                // if the file got deleted before we've loaded it don't crash...
            } catch (IOException) {
                // or if someone has locked the file for some reason, also don't crash...
            } finally {
                // Regardless of how we finish, mark us as loaded so we don't
                // try again.
                _loadState = LoadState.Loaded;
                _typeDb.EndModuleLoad(this);
            }
        }