static void Repair(string cachePath)
{
var streamFile = new FileInfo(Path.Combine(cachePath, CacheFetcher.CacheStreamName));
var checkFile = new FileInfo(Path.Combine(cachePath, CacheFetcher.CachePositionName));
var replace = new FileInfo(Path.Combine(cachePath, CacheFetcher.CachePositionName + ".fix"));
var posReader = new FileCheckpointArrayReader(checkFile, 2);
var vector = posReader.Read();
var sourceStream = streamFile.Open(FileMode.Open, FileAccess.Read, FileShare.ReadWrite);
var reader = new CacheReader(new FixedCheckpointArrayReader(vector), sourceStream, posReader);
var prev = 0L;
var pos = 0L;
var i = 0L;
while (true)
{
try {
var result = reader.ReadAll(pos, 1000, (id, position, maxPosition) => { });
if (result.ReadRecords > 0)
{
prev = pos;
pos = result.CurrentCachePosition;
i += 1;
if ((i % 100) == 0)
{
Console.WriteLine("{0}:{1:F1}GB", i, 1F * pos / 1024 / 1024 / 1024);
}
continue;
}
Console.WriteLine("We are good");
return;
}
catch (InvalidStorageFormatException ex) {
Console.WriteLine("Last known position {0}", pos);
Console.WriteLine("Previous position {0} (-{1} bytes)", prev, pos - prev);
var previousBlock = reader.ReadAll(prev, 1);
var msg = previousBlock.Messages.Single();
var offset = msg.Message.Id.GetOffset();
Console.WriteLine("Previous offset {0}", offset);
var replaceCheck = new FileCheckpointArrayWriter(replace, 2);
replaceCheck.GetOrInitPosition();
replaceCheck.Update(new long[] { prev, offset });
Console.WriteLine("Backup written");
}
break;
}
Console.ReadLine();
}