public TermVectorsWriter(Directory directory, System.String segment, FieldInfos fieldInfos)
{
// Open files for TermVector storage
tvx = directory.CreateOutput(segment + "." + IndexFileNames.VECTORS_INDEX_EXTENSION);
tvx.WriteInt(TermVectorsReader.FORMAT_CURRENT);
tvd = directory.CreateOutput(segment + "." + IndexFileNames.VECTORS_DOCUMENTS_EXTENSION);
tvd.WriteInt(TermVectorsReader.FORMAT_CURRENT);
tvf = directory.CreateOutput(segment + "." + IndexFileNames.VECTORS_FIELDS_EXTENSION);
tvf.WriteInt(TermVectorsReader.FORMAT_CURRENT);
this.fieldInfos = fieldInfos;
}
public TermVectorsWriter(Directory directory, System.String segment, FieldInfos fieldInfos)
{
// Open files for TermVector storage
tvx = directory.CreateOutput(segment + "." + IndexFileNames.VECTORS_INDEX_EXTENSION);
tvx.WriteInt(TermVectorsReader.FORMAT_CURRENT);
tvd = directory.CreateOutput(segment + "." + IndexFileNames.VECTORS_DOCUMENTS_EXTENSION);
tvd.WriteInt(TermVectorsReader.FORMAT_CURRENT);
tvf = directory.CreateOutput(segment + "." + IndexFileNames.VECTORS_FIELDS_EXTENSION);
tvf.WriteInt(TermVectorsReader.FORMAT_CURRENT);
this.fieldInfos = fieldInfos;
}
private void Initialize(Directory directory, System.String segment, FieldInfos fis, int interval, bool isi)
{
indexInterval = interval;
fieldInfos = fis;
isIndex = isi;
output = directory.CreateOutput(segment + (isIndex?".tii":".tis"));
output.WriteInt(FORMAT_CURRENT); // write format
output.WriteLong(0); // leave space for size
output.WriteInt(indexInterval); // write indexInterval
output.WriteInt(skipInterval); // write skipInterval
output.WriteInt(maxSkipLevels); // write maxSkipLevels
System.Diagnostics.Debug.Assert(InitUTF16Results());
}
public void Write(Directory d, System.String name)
{
IndexOutput output = d.CreateOutput(name);
try
{
Write(output);
}
finally
{
output.Close();
}
}
/// <summary>Writes this vector to the file <code>name</code> in Directory
/// <code>d</code>, in a format that can be read by the constructor {@link
/// #BitVector(Directory, String)}.
/// </summary>
public void Write(Directory d, System.String name)
{
IndexOutput output = d.CreateOutput(name);
try
{
if (IsSparse())
{
WriteDgaps(output); // sparse bit-set more efficiently saved as d-gaps.
}
else
{
WriteBits(output);
}
}
finally
{
output.Close();
}
}
public void Write(Directory d, System.String name)
{
IndexOutput output = d.CreateOutput(name);
try
{
Write(output);
}
finally
{
output.Close();
}
}
internal FieldsWriter(Directory d, System.String segment, FieldInfos fn)
{
fieldInfos = fn;
bool success = false;
System.String fieldsName = segment + "." + IndexFileNames.FIELDS_EXTENSION;
try
{
fieldsStream = d.CreateOutput(fieldsName);
fieldsStream.WriteInt(FORMAT_CURRENT);
success = true;
}
finally
{
if (!success)
{
try
{
Close();
}
catch (System.Exception t)
{
// Suppress so we keep throwing the original exception
}
try
{
d.DeleteFile(fieldsName);
}
catch (System.Exception t)
{
// Suppress so we keep throwing the original exception
}
}
}
success = false;
System.String indexName = segment + "." + IndexFileNames.FIELDS_INDEX_EXTENSION;
try
{
indexStream = d.CreateOutput(indexName);
indexStream.WriteInt(FORMAT_CURRENT);
success = true;
}
finally
{
if (!success)
{
try
{
Close();
}
catch (System.IO.IOException ioe)
{
}
try
{
d.DeleteFile(fieldsName);
}
catch (System.Exception t)
{
// Suppress so we keep throwing the original exception
}
try
{
d.DeleteFile(indexName);
}
catch (System.Exception t)
{
// Suppress so we keep throwing the original exception
}
}
}
doClose = true;
}
internal void FinishCommit(Directory dir)
{
if (pendingSegnOutput == null)
throw new System.SystemException("prepareCommit was not called");
bool success = false;
try
{
pendingSegnOutput.FinishCommit();
pendingSegnOutput.Close();
pendingSegnOutput = null;
success = true;
}
finally
{
if (!success)
RollbackCommit(dir);
}
// NOTE: if we crash here, we have left a segments_N
// file in the directory in a possibly corrupt state (if
// some bytes made it to stable storage and others
// didn't). But, the segments_N file includes checksum
// at the end, which should catch this case. So when a
// reader tries to read it, it will throw a
// CorruptIndexException, which should cause the retry
// logic in SegmentInfos to kick in and load the last
// good (previous) segments_N-1 file.
System.String fileName = IndexFileNames.FileNameFromGeneration(IndexFileNames.SEGMENTS, "", generation);
success = false;
try
{
dir.Sync(fileName);
success = true;
}
finally
{
if (!success)
{
try
{
dir.DeleteFile(fileName);
}
catch (System.Exception t)
{
// Suppress so we keep throwing the original exception
}
}
}
lastGeneration = generation;
try
{
IndexOutput genOutput = dir.CreateOutput(IndexFileNames.SEGMENTS_GEN);
try
{
genOutput.WriteInt(FORMAT_LOCKLESS);
genOutput.WriteLong(generation);
genOutput.WriteLong(generation);
}
finally
{
genOutput.Close();
}
}
catch (System.Exception t)
{
// It's OK if we fail to write this file since it's
// used only as one of the retry fallbacks.
}
}
private void Write(Directory directory)
{
System.String segmentFileName = GetNextSegmentFileName();
// Always advance the generation on write:
if (generation == - 1)
{
generation = 1;
}
else
{
generation++;
}
ChecksumIndexOutput segnOutput = new ChecksumIndexOutput(directory.CreateOutput(segmentFileName));
bool success = false;
try
{
segnOutput.WriteInt(CURRENT_FORMAT); // write FORMAT
segnOutput.WriteLong(++version); // every write changes
// the index
segnOutput.WriteInt(counter); // write counter
segnOutput.WriteInt(Count); // write infos
for (int i = 0; i < Count; i++)
{
Info(i).Write(segnOutput);
}
segnOutput.WriteStringStringMap(userData);
segnOutput.PrepareCommit();
success = true;
pendingSegnOutput = segnOutput;
}
finally
{
if (!success)
{
// We hit an exception above; try to close the file
// but suppress any exception:
try
{
segnOutput.Close();
}
catch (System.Exception t)
{
// Suppress so we keep throwing the original exception
}
try
{
// Try not to leave a truncated segments_N file in
// the index:
directory.DeleteFile(segmentFileName);
}
catch (System.Exception t)
{
// Suppress so we keep throwing the original exception
}
}
}
}
private void Initialize(Directory directory, System.String segment, FieldInfos fis, int interval, bool isi)
{
indexInterval = interval;
fieldInfos = fis;
isIndex = isi;
output = directory.CreateOutput(segment + (isIndex?".tii":".tis"));
output.WriteInt(FORMAT_CURRENT); // write format
output.WriteLong(0); // leave space for size
output.WriteInt(indexInterval); // write indexInterval
output.WriteInt(skipInterval); // write skipInterval
output.WriteInt(maxSkipLevels); // write maxSkipLevels
System.Diagnostics.Debug.Assert(InitUTF16Results());
}
internal FieldsWriter(Directory d, System.String segment, FieldInfos fn)
{
fieldInfos = fn;
bool success = false;
System.String fieldsName = segment + "." + IndexFileNames.FIELDS_EXTENSION;
try
{
fieldsStream = d.CreateOutput(fieldsName);
fieldsStream.WriteInt(FORMAT_CURRENT);
success = true;
}
finally
{
if (!success)
{
try
{
Close();
}
catch (System.Exception t)
{
// Suppress so we keep throwing the original exception
}
try
{
d.DeleteFile(fieldsName);
}
catch (System.Exception t)
{
// Suppress so we keep throwing the original exception
}
}
}
success = false;
System.String indexName = segment + "." + IndexFileNames.FIELDS_INDEX_EXTENSION;
try
{
indexStream = d.CreateOutput(indexName);
indexStream.WriteInt(FORMAT_CURRENT);
success = true;
}
finally
{
if (!success)
{
try
{
Close();
}
catch (System.IO.IOException ioe)
{
}
try
{
d.DeleteFile(fieldsName);
}
catch (System.Exception t)
{
// Suppress so we keep throwing the original exception
}
try
{
d.DeleteFile(indexName);
}
catch (System.Exception t)
{
// Suppress so we keep throwing the original exception
}
}
}
doClose = true;
}
/// <summary>Writes this vector to the file <code>name</code> in Directory
/// <code>d</code>, in a format that can be read by the constructor {@link
/// #BitVector(Directory, String)}.
/// </summary>
public void Write(Directory d, System.String name)
{
IndexOutput output = d.CreateOutput(name);
try
{
if (IsSparse())
{
WriteDgaps(output); // sparse bit-set more efficiently saved as d-gaps.
}
else
{
WriteBits(output);
}
}
finally
{
output.Close();
}
}
/// <summary>Merge files with the extensions added up to now.
/// All files with these extensions are combined sequentially into the
/// compound stream. After successful merge, the source files
/// are deleted.
/// </summary>
/// <throws> IllegalStateException if close() had been called before or </throws>
/// <summary> if no file has been added to this object
/// </summary>
public void Close()
{
if (merged)
{
throw new System.SystemException("Merge already performed");
}
if ((entries.Count == 0))
{
throw new System.SystemException("No entries to merge have been defined");
}
merged = true;
// open the compound stream
IndexOutput os = null;
try
{
os = directory.CreateOutput(fileName);
// Write the number of entries
os.WriteVInt(entries.Count);
// Write the directory with all offsets at 0.
// Remember the positions of directory entries so that we can
// adjust the offsets later
System.Collections.IEnumerator it = entries.GetEnumerator();
long totalSize = 0;
while (it.MoveNext())
{
FileEntry fe = (FileEntry)it.Current;
fe.directoryOffset = os.GetFilePointer();
os.WriteLong(0); // for now
os.WriteString(fe.file);
totalSize += directory.FileLength(fe.file);
}
// Pre-allocate size of file as optimization --
// this can potentially help IO performance as
// we write the file and also later during
// searching. It also uncovers a disk-full
// situation earlier and hopefully without
// actually filling disk to 100%:
long finalLength = totalSize + os.GetFilePointer();
os.SetLength(finalLength);
// Open the files and copy their data into the stream.
// Remember the locations of each file's data section.
byte[] buffer = new byte[16384];
it = entries.GetEnumerator();
while (it.MoveNext())
{
FileEntry fe = (FileEntry)it.Current;
fe.dataOffset = os.GetFilePointer();
CopyFile(fe, os, buffer);
}
// Write the data offsets into the directory of the compound stream
it = entries.GetEnumerator();
while (it.MoveNext())
{
FileEntry fe = (FileEntry)it.Current;
os.Seek(fe.directoryOffset);
os.WriteLong(fe.dataOffset);
}
System.Diagnostics.Debug.Assert(finalLength == os.Length());
// Close the output stream. Set the os to null before trying to
// close so that if an exception occurs during the close, the
// finally clause below will not attempt to close the stream
// the second time.
IndexOutput tmp = os;
os = null;
tmp.Close();
}
finally
{
if (os != null)
{
try
{
os.Close();
}
catch (System.IO.IOException e)
{
}
}
}
}
internal void FinishCommit(Directory dir)
{
if (pendingSegnOutput == null)
{
throw new System.SystemException("prepareCommit was not called");
}
bool success = false;
try
{
pendingSegnOutput.FinishCommit();
pendingSegnOutput.Close();
pendingSegnOutput = null;
success = true;
}
finally
{
if (!success)
{
RollbackCommit(dir);
}
}
// NOTE: if we crash here, we have left a segments_N
// file in the directory in a possibly corrupt state (if
// some bytes made it to stable storage and others
// didn't). But, the segments_N file includes checksum
// at the end, which should catch this case. So when a
// reader tries to read it, it will throw a
// CorruptIndexException, which should cause the retry
// logic in SegmentInfos to kick in and load the last
// good (previous) segments_N-1 file.
System.String fileName = IndexFileNames.FileNameFromGeneration(IndexFileNames.SEGMENTS, "", generation);
success = false;
try
{
dir.Sync(fileName);
success = true;
}
finally
{
if (!success)
{
try
{
dir.DeleteFile(fileName);
}
catch (System.Exception t)
{
// Suppress so we keep throwing the original exception
}
}
}
lastGeneration = generation;
try
{
IndexOutput genOutput = dir.CreateOutput(IndexFileNames.SEGMENTS_GEN);
try
{
genOutput.WriteInt(FORMAT_LOCKLESS);
genOutput.WriteLong(generation);
genOutput.WriteLong(generation);
}
finally
{
genOutput.Close();
}
}
catch (System.Exception t)
{
// It's OK if we fail to write this file since it's
// used only as one of the retry fallbacks.
}
}
private void Write(Directory directory)
{
System.String segmentFileName = GetNextSegmentFileName();
// Always advance the generation on write:
if (generation == -1)
{
generation = 1;
}
else
{
generation++;
}
ChecksumIndexOutput segnOutput = new ChecksumIndexOutput(directory.CreateOutput(segmentFileName));
bool success = false;
try
{
segnOutput.WriteInt(CURRENT_FORMAT); // write FORMAT
segnOutput.WriteLong(++version); // every write changes
// the index
segnOutput.WriteInt(counter); // write counter
segnOutput.WriteInt(Count); // write infos
for (int i = 0; i < Count; i++)
{
Info(i).Write(segnOutput);
}
segnOutput.WriteStringStringMap(userData);
segnOutput.PrepareCommit();
success = true;
pendingSegnOutput = segnOutput;
}
finally
{
if (!success)
{
// We hit an exception above; try to close the file
// but suppress any exception:
try
{
segnOutput.Close();
}
catch (System.Exception t)
{
// Suppress so we keep throwing the original exception
}
try
{
// Try not to leave a truncated segments_N file in
// the index:
directory.DeleteFile(segmentFileName);
}
catch (System.Exception t)
{
// Suppress so we keep throwing the original exception
}
}
}
}