/// <summary>
/// Checks if we have to recreate rootDirectory.
/// This is needed because old versions of this storage created too
/// much different files in the same dir, and Samsung's RFS has a bug
/// that after the 13.000th creation fails. So if cache is not already
/// in expected version let's destroy everything (if not in expected
/// version... there's nothing to reuse here anyway).
/// </summary>
private void RecreateDirectoryIfVersionChanges()
{
bool recreateBase = false;
if (!_rootDirectory.Exists)
{
recreateBase = true;
}
else if (!_versionDirectory.Exists)
{
recreateBase = true;
FileTree.DeleteRecursively(_rootDirectory);
}
if (recreateBase)
{
try
{
FileUtils.Mkdirs(_versionDirectory);
}
catch (CreateDirectoryException)
{
// Not the end of the world, when saving files we will try to
// create missing parent dirs
_cacheErrorLogger.LogError(
CacheErrorCategory.WRITE_CREATE_DIR,
typeof(DefaultDiskStorage),
"version directory could not be created: " + _versionDirectory);
}
}
}
internal void DeleteOldStorageIfNecessary()
{
if (_currentState.DiskStorageDelegate != null && _currentState.RootDirectory != null)
{
// LATER: Actually delegate this call to the storage. We shouldn't be
// making an end-run around it
FileTree.DeleteRecursively(_currentState.RootDirectory);
}
}
public void TestCreateRootDirectoryIfNecessary()
{
DynamicDefaultDiskStorage supplier = CreateInternalCacheDirStorage();
Assert.IsNull(supplier._currentState.DiskStorageDelegate);
DirectoryInfo cacheDir = new DirectoryInfo(ApplicationData.Current.LocalCacheFolder.Path);
DirectoryInfo baseDir = new DirectoryInfo(Path.Combine(cacheDir.FullName, _baseDirectoryName));
// Directory is clean
supplier.CreateRootDirectoryIfNecessary(baseDir);
baseDir.Refresh();
Assert.IsTrue(baseDir.Exists);
// Cleanup
FileTree.DeleteRecursively(baseDir);
// A file with the same name exists - this should clobber the file, and create a directory
// instead
FileInfo dummyFile = new FileInfo(Path.Combine(cacheDir.FullName, _baseDirectoryName));
Assert.IsTrue(dummyFile.CreateEmpty());
Assert.IsTrue(dummyFile.Exists);
supplier.CreateRootDirectoryIfNecessary(baseDir);
baseDir.Refresh();
Assert.IsTrue(baseDir.Exists);
// Cleanup
FileTree.DeleteRecursively(baseDir);
// A directory with the same name exists - and with a file in it.
// Everything should stay the same
baseDir.Create();
FileInfo dummyFile2 = new FileInfo(Path.Combine(baseDir.FullName, "dummy1"));
Assert.IsTrue(dummyFile2.CreateEmpty());
Assert.IsTrue(dummyFile2.Exists);
supplier.CreateRootDirectoryIfNecessary(baseDir);
baseDir.Refresh();
dummyFile2.Refresh();
Assert.IsTrue(dummyFile2.Exists);
}
