private void ScanningThread(PlatformIO.DriveInfo drive,
TVolume volume,
BufferedVolumeItemWriter writer)
{
TVolume returnVolume = null;
Exception fatalError = null;
bool cancelled = false;
try {
if (this.HasDB)
{
Database.TransactionBegin(); // locks VolumeDatabase
}
ScanningThreadMain(drive, volume, writer);
if (this.HasDB)
{
writer.Close();
if (!volume.IsInserted)
{
volume.InsertIntoDB();
}
returnVolume = volume;
database.TransactionCommit(); // unlocks VolumeDatabase
}
//result = ScanningResult.Success;
scanSucceeded = true;
} catch (Exception ex) {
Exception rollbackException = null;
try {
// rollback all database changes
if (this.HasDB)
{
database.TransactionRollback(); // unlocks VolumeDatabase
}
} catch (Exception e) {
rollbackException = e;
}
if (ex is ScanCancelledException)
{
//result = ScanningResult.Cancelled;
cancelled = true;
}
else
{
//result = ScanningResult.FatalError;
/* save the error that caused the scanner to stop (scanning failure) */
fatalError = ex;
//OnError(new ErrorEventArgs(ex));
PostError(ex);
Debug.WriteLine("Details for exception in ScanningThread():\n" + ex.ToString());
}
// in case an error occured while rollig back,
// post the error here, _after_ the initial error that made the scan fail.
if (rollbackException != null)
{
//OnError(new ErrorEventArgs(rollbackException));
PostError(rollbackException);
}
//#if THROW_EXCEPTIONS_ON_ALL_THREADS
// if (!(ex is ScanCancelledException))
// throw;
//#endif
} finally {
/*
* TODO : unlock db / thread // (in try / catch / PostError !!) */
//if (result == ScanningResult.Success)
// m_scanSucceeded = true;
//m_cancellationRequested = false;
isRunning = false;
//try { OnScanCompleted(new ScanCompletedEventArgs(result, mediaID, fatalError)); }
//catch (Exception e) { OnError(new ErrorEventArgs(e)); }
PostCompleted(returnVolume, fatalError, cancelled);
}
}
private void ImportThread(string sourceDbPath,
VolumeDatabase targetDb,
string dbDataPath,
int buferSize)
{
Exception fatalError = null;
bool cancelled = false;
try {
// must be the first call within the try block
targetDb.TransactionBegin(); // locks VolumeDatabase
if (!File.Exists(sourceDbPath))
{
throw new FileNotFoundException("Source database not found");
}
// note:
// don't use the writer in a using() block here as dispose() would write
// buffered items after an exception has been thrown.
BufferedVolumeItemWriter writer = new BufferedVolumeItemWriter(targetDb, true, bufferSize);
ImportThreadMain(sourceDbPath,
targetDb,
dbDataPath,
writer);
writer.Close();
targetDb.TransactionCommit(); // unlocks VolumeDatabase
importSucceeded = true;
} catch (Exception ex) {
Exception cleanupException = null;
try {
targetDb.TransactionRollback(); // unlocks VolumeDatabase
foreach (string path in volumeDataPaths)
{
Directory.Delete(path, true);
}
} catch (Exception e) {
cleanupException = e;
}
if (ex is ImportCancelledException)
{
cancelled = true;
}
else
{
/* save the error that caused the import to stop (import failure) */
fatalError = ex;
PostError(ex);
Debug.WriteLine("Details for exception in ImportThread():\n" + ex.ToString());
}
// in case an error occured while cleaning up,
// post the error here, _after_ the initial error that made the import fail.
if (cleanupException != null)
{
PostError(cleanupException);
}
//#if THROW_EXCEPTIONS_ON_ALL_THREADS
// if (!(ex is ScanCancelledException))
// throw;
//#endif
} finally {
isRunning = false;
PostCompleted(fatalError, cancelled);
}
}
private void ImportThread(string sourceDbPath,
VolumeDatabase targetDb,
string dbDataPath,
int buferSize)
{
Exception fatalError = null;
bool cancelled = false;
try {
// must be the first call within the try block
targetDb.TransactionBegin(); // locks VolumeDatabase
if (!File.Exists(sourceDbPath))
throw new FileNotFoundException("Source database not found");
// note:
// don't use the writer in a using() block here as dispose() would write
// buffered items after an exception has been thrown.
BufferedVolumeItemWriter writer = new BufferedVolumeItemWriter(targetDb, true, bufferSize);
ImportThreadMain(sourceDbPath,
targetDb,
dbDataPath,
writer);
writer.Close();
targetDb.TransactionCommit(); // unlocks VolumeDatabase
importSucceeded = true;
} catch (Exception ex) {
Exception cleanupException = null;
try {
targetDb.TransactionRollback(); // unlocks VolumeDatabase
foreach (string path in volumeDataPaths)
Directory.Delete(path, true);
} catch (Exception e) {
cleanupException = e;
}
if (ex is ImportCancelledException) {
cancelled = true;
} else {
/* save the error that caused the import to stop (import failure) */
fatalError = ex;
PostError(ex);
Debug.WriteLine("Details for exception in ImportThread():\n" + ex.ToString());
}
// in case an error occured while cleaning up,
// post the error here, _after_ the initial error that made the import fail.
if (cleanupException != null) {
PostError(cleanupException);
}
//#if THROW_EXCEPTIONS_ON_ALL_THREADS
// if (!(ex is ScanCancelledException))
// throw;
//#endif
} finally {
isRunning = false;
PostCompleted(fatalError, cancelled);
}
}
