/// <summary>
/// Rolls back all edits that are made to the archive file and disposes of this class.
/// </summary>
public override void Rollback()
{
if (m_disposed)
{
throw new ObjectDisposedException(GetType().FullName);
}
m_tree = null;
if (m_binaryStream1 != null)
{
m_binaryStream1.Dispose();
m_binaryStream1 = null;
}
if (m_subStream != null)
{
m_subStream.Dispose();
m_subStream = null;
}
m_currentTransaction.RollbackAndDispose();
InternalDispose();
}
private static void TestRollback(DiskIo stream, FileHeaderBlock fat)
{
SubFileName id1 = SubFileName.CreateRandom();
SubFileName id2 = SubFileName.CreateRandom();
SubFileName id3 = SubFileName.CreateRandom();
TransactionalEdit trans = new TransactionalEdit(stream);
//create 3 files additional files
SubFileStream fs21 = trans.CreateFile(id1);
SubFileStream fs22 = trans.CreateFile(id2);
SubFileStream fs23 = trans.CreateFile(id3);
//open files
SubFileStream fs1 = trans.OpenFile(0);
SubFileStream fs2 = trans.OpenFile(1);
SubFileStream fs3 = trans.OpenFile(2);
//read from them and verify content.
SubFileStreamTest.TestSingleByteRead(fs2);
SubFileStreamTest.TestCustomSizeRead(fs3, 5);
SubFileStreamTest.TestCustomSizeRead(fs1, BlockDataLength + 20);
//rewrite bad data.
SubFileStreamTest.TestSingleByteWrite(fs3);
SubFileStreamTest.TestCustomSizeWrite(fs1, 5);
SubFileStreamTest.TestCustomSizeWrite(fs2, BlockDataLength + 20);
fs1.Dispose();
fs2.Dispose();
fs3.Dispose();
fs21.Dispose();
fs22.Dispose();
fs23.Dispose();
trans.RollbackAndDispose();
}
public void Test()
{
Assert.AreEqual(Globals.MemoryPool.AllocatedBytes, 0L);
//string file = Path.GetTempFileName();
//System.IO.File.Delete(file);
try
{
//using (FileSystemSnapshotService service = FileSystemSnapshotService.CreateFile(file))
using (TransactionalFileStructure service = TransactionalFileStructure.CreateInMemory(BlockSize))
{
using (TransactionalEdit edit = service.BeginEdit())
{
SubFileStream fs = edit.CreateFile(SubFileName.CreateRandom());
BinaryStream bs = new BinaryStream(fs);
bs.Write((byte)1);
bs.Dispose();
fs.Dispose();
edit.CommitAndDispose();
}
{
ReadSnapshot read = service.Snapshot;
SubFileStream f1 = read.OpenFile(0);
BinaryStream bs1 = new BinaryStream(f1);
if (bs1.ReadUInt8() != 1)
{
throw new Exception();
}
using (TransactionalEdit edit = service.BeginEdit())
{
SubFileStream f2 = edit.OpenFile(0);
BinaryStream bs2 = new BinaryStream(f2);
if (bs2.ReadUInt8() != 1)
{
throw new Exception();
}
bs2.Write((byte)3);
bs2.Dispose();
} //rollback should be issued;
if (bs1.ReadUInt8() != 0)
{
throw new Exception();
}
bs1.Dispose();
{
ReadSnapshot read2 = service.Snapshot;
SubFileStream f2 = read2.OpenFile(0);
BinaryStream bs2 = new BinaryStream(f2);
if (bs2.ReadUInt8() != 1)
{
throw new Exception();
}
if (bs2.ReadUInt8() != 0)
{
throw new Exception();
}
bs2.Dispose();
}
}
using (TransactionalEdit edit = service.BeginEdit())
{
SubFileStream f2 = edit.OpenFile(0);
BinaryStream bs2 = new BinaryStream(f2);
bs2.Write((byte)13);
bs2.Write((byte)23);
bs2.Dispose();
edit.RollbackAndDispose();
} //rollback should be issued;
}
}
finally
{
//System.IO.File.Delete(file);
}
Assert.AreEqual(Globals.MemoryPool.AllocatedBytes, 0L);
Assert.IsTrue(true);
}
private static void TestRollback(DiskIo stream, FileHeaderBlock fat)
{
SubFileName id1 = SubFileName.CreateRandom();
SubFileName id2 = SubFileName.CreateRandom();
SubFileName id3 = SubFileName.CreateRandom();
TransactionalEdit trans = new TransactionalEdit(stream);
//create 3 files additional files
SubFileStream fs21 = trans.CreateFile(id1);
SubFileStream fs22 = trans.CreateFile(id2);
SubFileStream fs23 = trans.CreateFile(id3);
//open files
SubFileStream fs1 = trans.OpenFile(0);
SubFileStream fs2 = trans.OpenFile(1);
SubFileStream fs3 = trans.OpenFile(2);
//read from them and verify content.
SubFileStreamTest.TestSingleByteRead(fs2);
SubFileStreamTest.TestCustomSizeRead(fs3, 5);
SubFileStreamTest.TestCustomSizeRead(fs1, BlockDataLength + 20);
//rewrite bad data.
SubFileStreamTest.TestSingleByteWrite(fs3);
SubFileStreamTest.TestCustomSizeWrite(fs1, 5);
SubFileStreamTest.TestCustomSizeWrite(fs2, BlockDataLength + 20);
fs1.Dispose();
fs2.Dispose();
fs3.Dispose();
fs21.Dispose();
fs22.Dispose();
fs23.Dispose();
trans.RollbackAndDispose();
}