private long Truncate(string srcIxFileName)
{
Log.InfoFormat("truncating {0}", srcIxFileName);
var srcIx = SegmentInfo.Load(srcIxFileName);
var srcDataFileName = Path.Combine(_directory, srcIx.Version + ".rdb");
long version;
using (var source = new FileStream(srcDataFileName, FileMode.Open))
using (var documentStream = new DocumentTableStream(source, srcIx))
{
using (var upsert = new FullTextUpsertTransaction(
_directory,
_analyzer,
srcIx.Compression,
documentStream))
{
version = upsert.Write();
}
Log.InfoFormat("truncated ix {0}", version);
}
File.Delete(srcIxFileName);
return(version);
}
static void Rewrite(string[] args)
{
var take = int.MaxValue;
var skip = 0;
string pk = null;
bool gzip = false;
bool lz = false;
string dir = null;
if (Array.IndexOf(args, "--take") > 0)
{
take = int.Parse(args[Array.IndexOf(args, "--take") + 1]);
}
if (Array.IndexOf(args, "--skip") > 0)
{
skip = int.Parse(args[Array.IndexOf(args, "--skip") + 1]);
}
if (Array.IndexOf(args, "--pk") > 0)
{
pk = args[Array.IndexOf(args, "--pk") + 1];
}
if (Array.IndexOf(args, "--gzip") > 0)
{
gzip = true;
}
if (Array.IndexOf(args, "--lz") > 0)
{
lz = true;
}
if (Array.IndexOf(args, "--dir") > 0)
{
dir = args[Array.IndexOf(args, "--dir") + 1];
}
var compression = gzip ? Compression.GZip : lz ? Compression.Lz : Compression.NoCompression;
var dataFileName = args[Array.IndexOf(args, "--file") + 1];
var ixFileName = Directory.GetFiles(Path.GetDirectoryName(dataFileName), "*.ix")
.OrderBy(s => s).First();
var ix = SegmentInfo.Load(ixFileName);
Console.WriteLine("rewriting...");
var writeTimer = new Stopwatch();
writeTimer.Start();
using (var stream = new FileStream(dataFileName, FileMode.Open))
using (var documents = new DocumentTableStream(stream, ix, skip, take))
using (var upsert = new FullTextUpsertTransaction(dir, new Analyzer(), compression, documents))
{
upsert.Write();
}
Console.WriteLine("write operation took {0}", writeTimer.Elapsed);
}
public static IDictionary <long, SegmentInfo> GetIndexVersionInfoInChronologicalOrder(string directory)
{
var list = new Dictionary <long, SegmentInfo>();
foreach (var file in Directory.GetFiles(directory, "*.ix"))
{
var version = long.Parse(Path.GetFileNameWithoutExtension(file));
var ix = SegmentInfo.Load(Path.Combine(directory, version + ".ix"));
list.Add(version, ix);
}
return(list);
}
static void Export(string[] args)
{
var take = int.MaxValue;
var skip = 0;
if (Array.IndexOf(args, "--take") > 0)
{
take = int.Parse(args[Array.IndexOf(args, "--take") + 1]);
}
if (Array.IndexOf(args, "--skip") > 0)
{
skip = int.Parse(args[Array.IndexOf(args, "--skip") + 1]);
}
var sourceFileName = args[Array.IndexOf(args, "--source-file") + 1];
var targetFileName = args[Array.IndexOf(args, "--target-file") + 1];
var dir = Path.GetDirectoryName(sourceFileName);
var version = Path.GetFileNameWithoutExtension(sourceFileName);
var ix = SegmentInfo.Load(Path.Combine(dir, version + ".ix"));
Console.WriteLine("migrating...");
var writeTimer = new Stopwatch();
writeTimer.Start();
using (var sourceStream = new FileStream(sourceFileName, FileMode.Open))
using (var targetStream = new FileStream(targetFileName, FileMode.Create))
using (var jsonWriter = new StreamWriter(targetStream, Encoding.UTF8))
using (var documents = new DocumentTableStream(sourceStream, ix, skip, take))
{
jsonWriter.WriteLine("[");
foreach (var document in documents.ReadSource())
{
var dic = document.Fields.ToDictionary(x => x.Key, y => y.Value.Value);
var json = JsonConvert.SerializeObject(dic, Formatting.None);
jsonWriter.WriteLine(json);
}
jsonWriter.Write("]");
}
Console.WriteLine("write operation took {0}", writeTimer.Elapsed);
}
private long Merge(string srcIxFileName, string targetIxFileName)
{
Log.InfoFormat("merging branch {0} with trunk {1}", srcIxFileName, targetIxFileName);
var srcIx = SegmentInfo.Load(srcIxFileName);
var targetIx = SegmentInfo.Load(targetIxFileName);
var srcDataFileName = Path.Combine(_directory, srcIx.Version + ".rdb");
var targetDataFileName = Path.Combine(_directory, targetIx.Version + ".rdb");
FileStream lockFile;
if (!LockUtil.TryAquireWriteLock(_directory, out lockFile))
{
throw new InvalidOperationException(
"Cannot merge because there are other writes in progress.");
}
using (lockFile)
using (var source = new FileStream(srcDataFileName, FileMode.Open))
using (var target = new FileStream(targetDataFileName, FileMode.Append, FileAccess.Write, FileShare.ReadWrite))
{
var newStartIndex = targetIx.Length;
var fieldOffsets = new Dictionary <ulong, long>();
foreach (var field in srcIx.FieldOffsets)
{
fieldOffsets[field.Key] = field.Value + newStartIndex;
}
srcIx.FieldOffsets = fieldOffsets;
var tree = new byte[srcIx.PostingsOffset];
var postings = new byte[srcIx.DocHashOffset - srcIx.PostingsOffset];
var docHashes = new byte[srcIx.DocAddressesOffset - srcIx.DocHashOffset];
var docAddresses = new byte[srcIx.KeyIndexOffset - srcIx.DocAddressesOffset];
var documents = new byte[srcIx.Length - srcIx.KeyIndexOffset];
var sum = tree.Length + postings.Length + docHashes.Length + docAddresses.Length + documents.Length;
if (sum != srcIx.Length)
{
throw new DataMisalignedException("Size of segment does not compute.");
}
source.Read(tree, 0, tree.Length);
source.Read(postings, 0, postings.Length);
source.Read(docHashes, 0, docHashes.Length);
source.Read(docAddresses, 0, docAddresses.Length);
source.Read(documents, 0, documents.Length);
target.Write(tree, 0, tree.Length);
srcIx.PostingsOffset = target.Position;
target.Write(postings, 0, postings.Length);
srcIx.DocHashOffset = target.Position;
target.Write(docHashes, 0, docHashes.Length);
srcIx.DocAddressesOffset = target.Position;
target.Write(docAddresses, 0, docAddresses.Length);
srcIx.KeyIndexOffset = target.Position;
target.Write(documents, 0, documents.Length);
srcIx.Serialize(srcIxFileName);
Log.InfoFormat("merged {0} with {1} creating a segmented index", srcIxFileName, targetIx);
}
File.Delete(srcDataFileName);
return(srcIx.Version);
}