public IEnumerable<IStreamedEvent> Load(Guid identity)
{
FileStream fs;
try {
fs = new FileStream(
_repositoryHierarchy.For(identity, false),
FileMode.Open, FileAccess.Read, FileShare.None,
4096, FileOptions.SequentialScan);
} catch (FileNotFoundException x) {
throw new StreamNotFoundPersistenceException(identity, _repositoryHierarchy.RootPath, x);
} catch (DirectoryNotFoundException x) {
throw new StreamNotFoundPersistenceException(identity, _repositoryHierarchy.RootPath, x);
} catch (DriveNotFoundException x) {
throw new StreamNotFoundPersistenceException(identity, _repositoryHierarchy.RootPath, x);
}
// Note: The FileStream is created separately outside the using{} block because
// the C# compiler dislikes using the 'yield return' inside a try..catch block.
using (fs) {
using (var esw = new EventStreamReader(fs, _eventReader)) {
while (esw.HasNext())
yield return esw.Next();
}
}
}
public void Verify()
{
_innerStream.Position = 0;
using (var esr = new EventStreamReader(_innerStream.PreventClosure(), _eventReader)) {
while (_innerStream.Position < _innerStream.Length) {
try {
esr.Next();
} catch (TruncationVerificationPersistenceException x) {
// A trailing commit was unfinished possibly due to power cut or system crash.
// This can be repaired easily just by truncating the stream.
_innerStream.SetLength(x.Offset);
}
}
}
_innerStream.Position = _innerStream.Length;
}
