Mercurial > hg > svcore
view base/TempDirectory.h @ 489:82ab61fa9223
* Reorganise our sparql queries on the basis that Redland must be
available, not only optional. So for anything querying the pool
of data about plugins, we use a single datastore and model which
is initialised at the outset by PluginRDFIndexer and then queried
directly; for anything that "reads from a file" (e.g. loading
annotations) we query directly using Rasqal, going to the
datastore when we need additional plugin-related information.
This may improve performance, but mostly it simplifies the code
and fixes a serious issue with RDF import in the previous versions
(namely that multiple sequential RDF imports would end up sharing
the same RDF data pool!)
author | Chris Cannam |
---|---|
date | Fri, 21 Nov 2008 16:12:29 +0000 |
parents | 93fb1ebff76b |
children | fbe8afdfa8a6 |
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/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: */ /* Sonic Visualiser An audio file viewer and annotation editor. Centre for Digital Music, Queen Mary, University of London. This file copyright 2006 Chris Cannam. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. See the file COPYING included with this distribution for more information. */ #ifndef _TEMP_DIRECTORY_H_ #define _TEMP_DIRECTORY_H_ #include <QString> #include <QMutex> #include <exception> /** * A class that manages the creation and removal of a temporary * directory tree to store data during the program run. There is one * root temporary directory for the program, created on demand and * deleted when the program exits. * * This class is thread safe. */ class TempDirectory { public: static TempDirectory *getInstance(); virtual ~TempDirectory(); /** * Return the path of the directory in which the temporary * directory has been or will be created. This directory is * particular to this application, although not to this instance * of it, and it will not be removed when the application exits. * Persistent cache data or similar may be placed in this * directory or other, non-temporary subdirectories of it. * * If this directory does not exist, it will be created. Throw * DirectoryCreationFailed if the directory cannot be created. */ QString getContainingPath(); /** * Create the root temporary directory if necessary, and return * its path. This directory will be removed when the application * exits. * * Throw DirectoryCreationFailed if the directory cannot be * created. */ QString getPath(); /** * Create an immediate subdirectory of the root temporary * directory of the given name, if it doesn't already exist, and * return its path. This directory will be removed when the * application exits. * * Throw DirectoryCreationFailed if the directory cannot be * created. */ QString getSubDirectoryPath(QString subdir); /** * Delete the temporary directory (before exiting). */ void cleanup(); protected: TempDirectory(); QString createTempDirectoryIn(QString inDir); void cleanupDirectory(QString tmpDir); void cleanupAbandonedDirectories(QString svDir); QString m_tmpdir; QMutex m_mutex; static TempDirectory *m_instance; }; #endif