package org.apache.lucene.index;
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
import static org.apache.lucene.util.ByteBlockPool.BYTE_BLOCK_MASK;
import static org.apache.lucene.util.ByteBlockPool.BYTE_BLOCK_SIZE;
import java.io.IOException;
import java.text.NumberFormat;
import java.util.HashSet;
import java.util.Locale;
import java.util.Set;
import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.codecs.Codec;
import org.apache.lucene.index.DocumentsWriterDeleteQueue.DeleteSlice;
import org.apache.lucene.search.similarities.Similarity;
import org.apache.lucene.store.Directory;
import org.apache.lucene.store.FlushInfo;
import org.apache.lucene.store.IOContext;
import org.apache.lucene.store.TrackingDirectoryWrapper;
import org.apache.lucene.util.ByteBlockPool.Allocator;
import org.apache.lucene.util.ByteBlockPool.DirectTrackingAllocator;
import org.apache.lucene.util.Constants;
import org.apache.lucene.util.Counter;
import org.apache.lucene.util.InfoStream;
import org.apache.lucene.util.IntBlockPool;
import org.apache.lucene.util.MutableBits;
import org.apache.lucene.util.RamUsageEstimator;
class DocumentsWriterPerThread {
/**
* The IndexingChain must define the {@link #getChain(DocumentsWriterPerThread)} method
* which returns the DocConsumer that the DocumentsWriter calls to process the
* documents.
*/
abstract static class IndexingChain {
abstract DocConsumer getChain(DocumentsWriterPerThread documentsWriterPerThread) throws IOException;
}
static final IndexingChain defaultIndexingChain = new IndexingChain() {
@Override
DocConsumer getChain(DocumentsWriterPerThread documentsWriterPerThread) throws IOException {
return new DefaultIndexingChain(documentsWriterPerThread);
}
};
static class DocState {
final DocumentsWriterPerThread docWriter;
Analyzer analyzer;
InfoStream infoStream;
Similarity similarity;
int docID;
Iterable<? extends IndexableField> doc;
DocState(DocumentsWriterPerThread docWriter, InfoStream infoStream) {
this.docWriter = docWriter;
this.infoStream = infoStream;
}
// Only called by asserts
public boolean testPoint(String name) {
return docWriter.testPoint(name);
}
public void clear() {
// don't hold onto doc nor analyzer, in case it is
// largish:
doc = null;
analyzer = null;
}
}
static class FlushedSegment {
final SegmentCommitInfo segmentInfo;
final FieldInfos fieldInfos;
final FrozenBufferedUpdates segmentUpdates;
final MutableBits liveDocs;
final int delCount;
private FlushedSegment(SegmentCommitInfo segmentInfo, FieldInfos fieldInfos,
BufferedUpdates segmentUpdates, MutableBits liveDocs, int delCount) {
this.segmentInfo = segmentInfo;
this.fieldInfos = fieldInfos;
this.segmentUpdates = segmentUpdates != null && segmentUpdates.any() ? new FrozenBufferedUpdates(segmentUpdates, true) : null;
this.liveDocs = liveDocs;
this.delCount = delCount;
}
}
/** Called if we hit an exception at a bad time (when
* updating the index files) and must discard all
* currently buffered docs. This resets our state,
* discarding any docs added since last flush. */
void abort(Set<String> createdFiles) {
//System.out.println(Thread.currentThread().getName() + ": now abort seg=" + segmentInfo.name);
hasAborted = aborting = true;
try {
if (infoStream.isEnabled("DWPT")) {
infoStream.message("DWPT", "now abort");
}
try {
consumer.abort();
} catch (Throwable t) {
}
pendingUpdates.clear();
createdFiles.addAll(directory.getCreatedFiles());
} finally {
aborting = false;
if (infoStream.isEnabled("DWPT")) {
infoStream.message("DWPT", "done abort");
}
}
}
private final static boolean INFO_VERBOSE = false;
final Codec codec;
final TrackingDirectoryWrapper directory;
final Directory directoryOrig;
final DocState docState;
final DocConsumer consumer;
final Counter bytesUsed;
SegmentWriteState flushState;
// Updates for our still-in-RAM (to be flushed next) segment
final BufferedUpdates pendingUpdates;
private final SegmentInfo segmentInfo; // Current segment we are working on
boolean aborting = false; // True if an abort is pending
boolean hasAborted = false; // True if the last exception throws by #updateDocument was aborting
private final FieldInfos.Builder fieldInfos;
private final InfoStream infoStream;
private int numDocsInRAM;
final DocumentsWriterDeleteQueue deleteQueue;
private final DeleteSlice deleteSlice;
private final NumberFormat nf = NumberFormat.getInstance(Locale.ROOT);
final Allocator byteBlockAllocator;
final IntBlockPool.Allocator intBlockAllocator;
private final LiveIndexWriterConfig indexWriterConfig;
public DocumentsWriterPerThread(String segmentName, Directory directory, LiveIndexWriterConfig indexWriterConfig, InfoStream infoStream, DocumentsWriterDeleteQueue deleteQueue,
FieldInfos.Builder fieldInfos) throws IOException {
this.directoryOrig = directory;
this.directory = new TrackingDirectoryWrapper(directory);
this.fieldInfos = fieldInfos;
this.indexWriterConfig = indexWriterConfig;
this.infoStream = infoStream;
this.codec = indexWriterConfig.getCodec();
this.docState = new DocState(this, infoStream);
this.docState.similarity = indexWriterConfig.getSimilarity();
bytesUsed = Counter.newCounter();
byteBlockAllocator = new DirectTrackingAllocator(bytesUsed);
pendingUpdates = new BufferedUpdates();
intBlockAllocator = new IntBlockAllocator(bytesUsed);
this.deleteQueue = deleteQueue;
assert numDocsInRAM == 0 : "num docs " + numDocsInRAM;
pendingUpdates.clear();
deleteSlice = deleteQueue.newSlice();
segmentInfo = new SegmentInfo(directoryOrig, Constants.LUCENE_MAIN_VERSION, segmentName, -1, false, codec, null);
assert numDocsInRAM == 0;
if (INFO_VERBOSE && infoStream.isEnabled("DWPT")) {
infoStream.message("DWPT", Thread.currentThread().getName() + " init seg=" + segmentName + " delQueue=" + deleteQueue);
}
// this should be the last call in the ctor
// it really sucks that we need to pull this within the ctor and pass this ref to the chain!
consumer = indexWriterConfig.getIndexingChain().getChain(this);
}
void setAborting() {
aborting = true;
}
public FieldInfos.Builder getFieldInfosBuilder() {
return fieldInfos;
}
boolean checkAndResetHasAborted() {
final boolean retval = hasAborted;
hasAborted = false;
return retval;
}
final boolean testPoint(String message) {
if (infoStream.isEnabled("TP")) {
infoStream.message("TP", message);
}
return true;
}
public void updateDocument(Iterable<? extends IndexableField> doc, Analyzer analyzer, Term delTerm) throws IOException {
assert testPoint("DocumentsWriterPerThread addDocument start");
assert deleteQueue != null;
docState.doc = doc;
docState.analyzer = analyzer;
docState.docID = numDocsInRAM;
if (INFO_VERBOSE && infoStream.isEnabled("DWPT")) {
infoStream.message("DWPT", Thread.currentThread().getName() + " update delTerm=" + delTerm + " docID=" + docState.docID + " seg=" + segmentInfo.name);
}
boolean success = false;
try {
try {
consumer.processDocument();
} finally {
docState.clear();
}
success = true;
} finally {
if (!success) {
if (!aborting) {
// mark document as deleted
deleteDocID(docState.docID);
numDocsInRAM++;
} else {
abort(filesToDelete);
}
}
}
finishDocument(delTerm);
}
public int updateDocuments(Iterable<? extends Iterable<? extends IndexableField>> docs, Analyzer analyzer, Term delTerm) throws IOException {
assert testPoint("DocumentsWriterPerThread addDocuments start");
assert deleteQueue != null;
docState.analyzer = analyzer;
if (INFO_VERBOSE && infoStream.isEnabled("DWPT")) {
infoStream.message("DWPT", Thread.currentThread().getName() + " update delTerm=" + delTerm + " docID=" + docState.docID + " seg=" + segmentInfo.name);
}
int docCount = 0;
boolean allDocsIndexed = false;
try {
for(Iterable<? extends IndexableField> doc : docs) {
docState.doc = doc;
docState.docID = numDocsInRAM;
docCount++;
boolean success = false;
try {
consumer.processDocument();
success = true;
} finally {
if (!success) {
// An exc is being thrown...
if (!aborting) {
// Incr here because finishDocument will not
// be called (because an exc is being thrown):
numDocsInRAM++;
} else {
abort(filesToDelete);
}
}
}
finishDocument(null);
}
allDocsIndexed = true;
// Apply delTerm only after all indexing has
// succeeded, but apply it only to docs prior to when
// this batch started:
if (delTerm != null) {
deleteQueue.add(delTerm, deleteSlice);
assert deleteSlice.isTailItem(delTerm) : "expected the delete term as the tail item";
deleteSlice.apply(pendingUpdates, numDocsInRAM-docCount);
}
} finally {
if (!allDocsIndexed && !aborting) {
// the iterator threw an exception that is not aborting
// go and mark all docs from this block as deleted
int docID = numDocsInRAM-1;
final int endDocID = docID - docCount;
while (docID > endDocID) {
deleteDocID(docID);
docID--;
}
}
docState.clear();
}
return docCount;
}
private void finishDocument(Term delTerm) {
/*
* here we actually finish the document in two steps 1. push the delete into
* the queue and update our slice. 2. increment the DWPT private document
* id.
*
* the updated slice we get from 1. holds all the deletes that have occurred
* since we updated the slice the last time.
*/
boolean applySlice = numDocsInRAM != 0;
if (delTerm != null) {
deleteQueue.add(delTerm, deleteSlice);
assert deleteSlice.isTailItem(delTerm) : "expected the delete term as the tail item";
} else {
applySlice &= deleteQueue.updateSlice(deleteSlice);
}
if (applySlice) {
deleteSlice.apply(pendingUpdates, numDocsInRAM);
} else { // if we don't need to apply we must reset!
deleteSlice.reset();
}
++numDocsInRAM;
}
// Buffer a specific docID for deletion. Currently only
// used when we hit an exception when adding a document
void deleteDocID(int docIDUpto) {
pendingUpdates.addDocID(docIDUpto);
// NOTE: we do not trigger flush here. This is
// potentially a RAM leak, if you have an app that tries
// to add docs but every single doc always hits a
// non-aborting exception. Allowing a flush here gets
// very messy because we are only invoked when handling
// exceptions so to do this properly, while handling an
// exception we'd have to go off and flush new deletes
// which is risky (likely would hit some other
// confounding exception).
}
/**
* Returns the number of delete terms in this {@link DocumentsWriterPerThread}
*/
public int numDeleteTerms() {
// public for FlushPolicy
return pendingUpdates.numTermDeletes.get();
}
/**
* Returns the number of RAM resident documents in this {@link DocumentsWriterPerThread}
*/
public int getNumDocsInRAM() {
// public for FlushPolicy
return numDocsInRAM;
}
/**
* Prepares this DWPT for flushing. This method will freeze and return the
* {@link DocumentsWriterDeleteQueue}s global buffer and apply all pending
* deletes to this DWPT.
*/
FrozenBufferedUpdates prepareFlush() {
assert numDocsInRAM > 0;
final FrozenBufferedUpdates globalUpdates = deleteQueue.freezeGlobalBuffer(deleteSlice);
/* deleteSlice can possibly be null if we have hit non-aborting exceptions during indexing and never succeeded
adding a document. */
if (deleteSlice != null) {
// apply all deletes before we flush and release the delete slice
deleteSlice.apply(pendingUpdates, numDocsInRAM);
assert deleteSlice.isEmpty();
deleteSlice.reset();
}
return globalUpdates;
}
/** Flush all pending docs to a new segment */
FlushedSegment flush() throws IOException {
assert numDocsInRAM > 0;
assert deleteSlice.isEmpty() : "all deletes must be applied in prepareFlush";
segmentInfo.setDocCount(numDocsInRAM);
final SegmentWriteState flushState = new SegmentWriteState(infoStream, directory, segmentInfo, fieldInfos.finish(),
indexWriterConfig.getTermIndexInterval(),
pendingUpdates, new IOContext(new FlushInfo(numDocsInRAM, bytesUsed())));
final double startMBUsed = bytesUsed() / 1024. / 1024.;
// Apply delete-by-docID now (delete-byDocID only
// happens when an exception is hit processing that
// doc, eg if analyzer has some problem w/ the text):
if (pendingUpdates.docIDs.size() > 0) {
flushState.liveDocs = codec.liveDocsFormat().newLiveDocs(numDocsInRAM);
for(int delDocID : pendingUpdates.docIDs) {
flushState.liveDocs.clear(delDocID);
}
flushState.delCountOnFlush = pendingUpdates.docIDs.size();
pendingUpdates.bytesUsed.addAndGet(-pendingUpdates.docIDs.size() * BufferedUpdates.BYTES_PER_DEL_DOCID);
pendingUpdates.docIDs.clear();
}
if (aborting) {
if (infoStream.isEnabled("DWPT")) {
infoStream.message("DWPT", "flush: skip because aborting is set");
}
return null;
}
if (infoStream.isEnabled("DWPT")) {
infoStream.message("DWPT", "flush postings as segment " + flushState.segmentInfo.name + " numDocs=" + numDocsInRAM);
}
boolean success = false;
try {
consumer.flush(flushState);
pendingUpdates.terms.clear();
segmentInfo.setFiles(new HashSet<>(directory.getCreatedFiles()));
final SegmentCommitInfo segmentInfoPerCommit = new SegmentCommitInfo(segmentInfo, 0, -1L, -1L, -1L);
if (infoStream.isEnabled("DWPT")) {
infoStream.message("DWPT", "new segment has " + (flushState.liveDocs == null ? 0 : flushState.delCountOnFlush) + " deleted docs");
infoStream.message("DWPT", "new segment has " +
(flushState.fieldInfos.hasVectors() ? "vectors" : "no vectors") + "; " +
(flushState.fieldInfos.hasNorms() ? "norms" : "no norms") + "; " +
(flushState.fieldInfos.hasDocValues() ? "docValues" : "no docValues") + "; " +
(flushState.fieldInfos.hasProx() ? "prox" : "no prox") + "; " +
(flushState.fieldInfos.hasFreq() ? "freqs" : "no freqs"));
infoStream.message("DWPT", "flushedFiles=" + segmentInfoPerCommit.files());
infoStream.message("DWPT", "flushed codec=" + codec);
}
final BufferedUpdates segmentDeletes;
if (pendingUpdates.queries.isEmpty() && pendingUpdates.numericUpdates.isEmpty() && pendingUpdates.binaryUpdates.isEmpty()) {
pendingUpdates.clear();
segmentDeletes = null;
} else {
segmentDeletes = pendingUpdates;
}
if (infoStream.isEnabled("DWPT")) {
final double newSegmentSize = segmentInfoPerCommit.sizeInBytes()/1024./1024.;
infoStream.message("DWPT", "flushed: segment=" + segmentInfo.name +
" ramUsed=" + nf.format(startMBUsed) + " MB" +
" newFlushedSize(includes docstores)=" + nf.format(newSegmentSize) + " MB" +
" docs/MB=" + nf.format(flushState.segmentInfo.getDocCount() / newSegmentSize));
}
assert segmentInfo != null;
FlushedSegment fs = new FlushedSegment(segmentInfoPerCommit, flushState.fieldInfos,
segmentDeletes, flushState.liveDocs, flushState.delCountOnFlush);
sealFlushedSegment(fs);
success = true;
return fs;
} finally {
if (!success) {
abort(filesToDelete);
}
}
}
private final Set<String> filesToDelete = new HashSet<>();
public Set<String> pendingFilesToDelete() {
return filesToDelete;
}
/**
* Seals the {@link SegmentInfo} for the new flushed segment and persists
* the deleted documents {@link MutableBits}.
*/
void sealFlushedSegment(FlushedSegment flushedSegment) throws IOException {
assert flushedSegment != null;
SegmentCommitInfo newSegment = flushedSegment.segmentInfo;
IndexWriter.setDiagnostics(newSegment.info, IndexWriter.SOURCE_FLUSH);
IOContext context = new IOContext(new FlushInfo(newSegment.info.getDocCount(), newSegment.sizeInBytes()));
boolean success = false;
try {
if (indexWriterConfig.getUseCompoundFile()) {
filesToDelete.addAll(IndexWriter.createCompoundFile(infoStream, directory, MergeState.CheckAbort.NONE, newSegment.info, context));
newSegment.info.setUseCompoundFile(true);
}
// Have codec write SegmentInfo. Must do this after
// creating CFS so that 1) .si isn't slurped into CFS,
// and 2) .si reflects useCompoundFile=true change
// above:
codec.segmentInfoFormat().getSegmentInfoWriter().write(directory, newSegment.info, flushedSegment.fieldInfos, context);
// TODO: ideally we would freeze newSegment here!!
// because any changes after writing the .si will be
// lost...
// Must write deleted docs after the CFS so we don't
// slurp the del file into CFS:
if (flushedSegment.liveDocs != null) {
final int delCount = flushedSegment.delCount;
assert delCount > 0;
if (infoStream.isEnabled("DWPT")) {
infoStream.message("DWPT", "flush: write " + delCount + " deletes gen=" + flushedSegment.segmentInfo.getDelGen());
}
// TODO: we should prune the segment if it's 100%
// deleted... but merge will also catch it.
// TODO: in the NRT case it'd be better to hand
// this del vector over to the
// shortly-to-be-opened SegmentReader and let it
// carry the changes; there's no reason to use
// filesystem as intermediary here.
SegmentCommitInfo info = flushedSegment.segmentInfo;
Codec codec = info.info.getCodec();
codec.liveDocsFormat().writeLiveDocs(flushedSegment.liveDocs, directory, info, delCount, context);
newSegment.setDelCount(delCount);
newSegment.advanceDelGen();
}
success = true;
} finally {
if (!success) {
if (infoStream.isEnabled("DWPT")) {
infoStream.message("DWPT",
"hit exception creating compound file for newly flushed segment " + newSegment.info.name);
}
}
}
}
/** Get current segment info we are writing. */
SegmentInfo getSegmentInfo() {
return segmentInfo;
}
long bytesUsed() {
return bytesUsed.get() + pendingUpdates.bytesUsed.get();
}
/* Initial chunks size of the shared byte[] blocks used to
store postings data */
final static int BYTE_BLOCK_NOT_MASK = ~BYTE_BLOCK_MASK;
/* if you increase this, you must fix field cache impl for
* getTerms/getTermsIndex requires <= 32768 */
final static int MAX_TERM_LENGTH_UTF8 = BYTE_BLOCK_SIZE-2;
private static class IntBlockAllocator extends IntBlockPool.Allocator {
private final Counter bytesUsed;
public IntBlockAllocator(Counter bytesUsed) {
super(IntBlockPool.INT_BLOCK_SIZE);
this.bytesUsed = bytesUsed;
}
/* Allocate another int[] from the shared pool */
@Override
public int[] getIntBlock() {
int[] b = new int[IntBlockPool.INT_BLOCK_SIZE];
bytesUsed.addAndGet(IntBlockPool.INT_BLOCK_SIZE
* RamUsageEstimator.NUM_BYTES_INT);
return b;
}
@Override
public void recycleIntBlocks(int[][] blocks, int offset, int length) {
bytesUsed.addAndGet(-(length * (IntBlockPool.INT_BLOCK_SIZE * RamUsageEstimator.NUM_BYTES_INT)));
}
}
@Override
public String toString() {
return "DocumentsWriterPerThread [pendingDeletes=" + pendingUpdates
+ ", segment=" + (segmentInfo != null ? segmentInfo.name : "null") + ", aborting=" + aborting + ", numDocsInRAM="
+ numDocsInRAM + ", deleteQueue=" + deleteQueue + "]";
}
}