public void testSizeInBytesCache() throws Exception {
Directory dir = newDirectory();
IndexWriterConfig conf =
newIndexWriterConfig(TEST_VERSION_CURRENT, new MockAnalyzer())
.setMergePolicy(newLogMergePolicy());
IndexWriter writer = new IndexWriter(dir, conf);
writer.setInfoStream(VERBOSE ? System.out : null);
Document doc = new Document();
doc.add(new Field("a", "value", Store.YES, Index.ANALYZED));
writer.addDocument(doc);
writer.close();
SegmentInfos sis = new SegmentInfos();
sis.read(dir);
SegmentInfo si = sis.info(0);
long sizeInBytesNoStore = si.sizeInBytes(false);
long sizeInBytesWithStore = si.sizeInBytes(true);
assertTrue(
"sizeInBytesNoStore="
+ sizeInBytesNoStore
+ " sizeInBytesWithStore="
+ sizeInBytesWithStore,
sizeInBytesWithStore > sizeInBytesNoStore);
dir.close();
}
public void listSegments() throws IOException {
DecimalFormat formatter = new DecimalFormat("###,###.###");
for (int x = 0; x < infos.size(); x++) {
SegmentInfo info = infos.info(x);
String sizeStr = formatter.format(info.sizeInBytes(true));
System.out.println(info.name + " " + sizeStr);
}
}
// Used by near real-time search
DirectoryReader(
IndexWriter writer, SegmentInfos infos, int termInfosIndexDivisor, boolean applyAllDeletes)
throws IOException {
this.directory = writer.getDirectory();
this.readOnly = true;
this.applyAllDeletes = applyAllDeletes; // saved for reopen
this.termInfosIndexDivisor = termInfosIndexDivisor;
readerFinishedListeners = writer.getReaderFinishedListeners();
// IndexWriter synchronizes externally before calling
// us, which ensures infos will not change; so there's
// no need to process segments in reverse order
final int numSegments = infos.size();
List<SegmentReader> readers = new ArrayList<SegmentReader>();
final Directory dir = writer.getDirectory();
segmentInfos = (SegmentInfos) infos.clone();
int infosUpto = 0;
for (int i = 0; i < numSegments; i++) {
boolean success = false;
try {
final SegmentInfo info = infos.info(i);
assert info.dir == dir;
final SegmentReader reader =
writer.readerPool.getReadOnlyClone(info, true, termInfosIndexDivisor);
if (reader.numDocs() > 0 || writer.getKeepFullyDeletedSegments()) {
reader.readerFinishedListeners = readerFinishedListeners;
readers.add(reader);
infosUpto++;
} else {
reader.close();
segmentInfos.remove(infosUpto);
}
success = true;
} finally {
if (!success) {
// Close all readers we had opened:
for (SegmentReader reader : readers) {
try {
reader.close();
} catch (Throwable ignore) {
// keep going - we want to clean up as much as possible
}
}
}
}
}
this.writer = writer;
initialize(readers.toArray(new SegmentReader[readers.size()]));
}
/** Construct reading the named set of readers. */
DirectoryReader(
Directory directory,
SegmentInfos sis,
IndexDeletionPolicy deletionPolicy,
boolean readOnly,
int termInfosIndexDivisor,
Collection<ReaderFinishedListener> readerFinishedListeners)
throws IOException {
this.directory = directory;
this.readOnly = readOnly;
this.segmentInfos = sis;
this.deletionPolicy = deletionPolicy;
this.termInfosIndexDivisor = termInfosIndexDivisor;
if (readerFinishedListeners == null) {
this.readerFinishedListeners =
new MapBackedSet<ReaderFinishedListener>(
new ConcurrentHashMap<ReaderFinishedListener, Boolean>());
} else {
this.readerFinishedListeners = readerFinishedListeners;
}
applyAllDeletes = false;
// To reduce the chance of hitting FileNotFound
// (and having to retry), we open segments in
// reverse because IndexWriter merges & deletes
// the newest segments first.
SegmentReader[] readers = new SegmentReader[sis.size()];
for (int i = sis.size() - 1; i >= 0; i--) {
boolean success = false;
try {
readers[i] = SegmentReader.get(readOnly, sis.info(i), termInfosIndexDivisor);
readers[i].readerFinishedListeners = this.readerFinishedListeners;
success = true;
} finally {
if (!success) {
// Close all readers we had opened:
for (i++; i < sis.size(); i++) {
try {
readers[i].close();
} catch (Throwable ignore) {
// keep going - we want to clean up as much as possible
}
}
}
}
}
initialize(readers);
}
@Override
public synchronized IndexReader reopen() throws CorruptIndexException, IOException {
IndexReader newInner = null;
SegmentInfos sinfos = new SegmentInfos();
sinfos.read(_dir);
int size = sinfos.size();
if (in instanceof MultiReader) {
// setup current reader list
List<IndexReader> boboReaderList = new LinkedList<IndexReader>();
ReaderUtil.gatherSubReaders((List<IndexReader>) boboReaderList, in);
Map<String, BoboIndexReader> readerMap = new HashMap<String, BoboIndexReader>();
for (IndexReader reader : boboReaderList) {
BoboIndexReader boboReader = (BoboIndexReader) reader;
SegmentReader sreader = (SegmentReader) (boboReader.in);
readerMap.put(sreader.getSegmentName(), boboReader);
}
ArrayList<BoboIndexReader> currentReaders = new ArrayList<BoboIndexReader>(size);
boolean isNewReader = false;
for (int i = 0; i < size; ++i) {
SegmentInfo sinfo = (SegmentInfo) sinfos.info(i);
BoboIndexReader breader = readerMap.remove(sinfo.name);
if (breader != null) {
// should use SegmentReader.reopen
// TODO: see LUCENE-2559
BoboIndexReader newReader = (BoboIndexReader) breader.reopen(true);
if (newReader != breader) {
isNewReader = true;
}
if (newReader != null) {
currentReaders.add(newReader);
}
} else {
isNewReader = true;
SegmentReader newSreader = SegmentReader.get(true, sinfo, 1);
breader =
BoboIndexReader.getInstanceAsSubReader(
newSreader, this._facetHandlers, this._runtimeFacetHandlerFactories);
breader._dir = _dir;
currentReaders.add(breader);
}
}
isNewReader = isNewReader || (readerMap.size() != 0);
if (!isNewReader) {
return this;
} else {
MultiReader newMreader =
new MultiReader(
currentReaders.toArray(new BoboIndexReader[currentReaders.size()]), false);
BoboIndexReader newReader =
BoboIndexReader.getInstanceAsSubReader(
newMreader, this._facetHandlers, this._runtimeFacetHandlerFactories);
newReader._dir = _dir;
return newReader;
}
} else if (in instanceof SegmentReader) {
// should use SegmentReader.reopen
// TODO: see LUCENE-2559
SegmentReader sreader = (SegmentReader) in;
int numDels = sreader.numDeletedDocs();
SegmentInfo sinfo = null;
boolean sameSeg = false;
// get SegmentInfo instance
for (int i = 0; i < size; ++i) {
SegmentInfo sinfoTmp = (SegmentInfo) sinfos.info(i);
if (sinfoTmp.name.equals(sreader.getSegmentName())) {
int numDels2 = sinfoTmp.getDelCount();
sameSeg = numDels == numDels2;
sinfo = sinfoTmp;
break;
}
}
if (sinfo == null) {
// segment no longer exists
return null;
}
if (sameSeg) {
return this;
} else {
SegmentReader newSreader = SegmentReader.get(true, sinfo, 1);
return BoboIndexReader.getInstanceAsSubReader(
newSreader, this._facetHandlers, this._runtimeFacetHandlerFactories);
}
} else {
// should not reach here, a catch-all default case
IndexReader reader = in.reopen(true);
if (in != reader) {
return BoboIndexReader.getInstance(
newInner, _facetHandlers, _runtimeFacetHandlerFactories, _workArea);
} else {
return this;
}
}
}
/** This constructor is only used for {@link #doOpenIfChanged()} */
DirectoryReader(
Directory directory,
SegmentInfos infos,
SegmentReader[] oldReaders,
int[] oldStarts,
Map<String, byte[]> oldNormsCache,
boolean readOnly,
boolean doClone,
int termInfosIndexDivisor,
Collection<ReaderFinishedListener> readerFinishedListeners)
throws IOException {
this.directory = directory;
this.readOnly = readOnly;
this.segmentInfos = infos;
this.termInfosIndexDivisor = termInfosIndexDivisor;
assert readerFinishedListeners != null;
this.readerFinishedListeners = readerFinishedListeners;
applyAllDeletes = false;
// we put the old SegmentReaders in a map, that allows us
// to lookup a reader using its segment name
Map<String, Integer> segmentReaders = new HashMap<String, Integer>();
if (oldReaders != null) {
// create a Map SegmentName->SegmentReader
for (int i = 0; i < oldReaders.length; i++) {
segmentReaders.put(oldReaders[i].getSegmentName(), Integer.valueOf(i));
}
}
SegmentReader[] newReaders = new SegmentReader[infos.size()];
// remember which readers are shared between the old and the re-opened
// DirectoryReader - we have to incRef those readers
boolean[] readerShared = new boolean[infos.size()];
for (int i = infos.size() - 1; i >= 0; i--) {
// find SegmentReader for this segment
Integer oldReaderIndex = segmentReaders.get(infos.info(i).name);
if (oldReaderIndex == null) {
// this is a new segment, no old SegmentReader can be reused
newReaders[i] = null;
} else {
// there is an old reader for this segment - we'll try to reopen it
newReaders[i] = oldReaders[oldReaderIndex.intValue()];
}
boolean success = false;
try {
SegmentReader newReader;
if (newReaders[i] == null
|| infos.info(i).getUseCompoundFile()
!= newReaders[i].getSegmentInfo().getUseCompoundFile()) {
// We should never see a totally new segment during cloning
assert !doClone;
// this is a new reader; in case we hit an exception we can close it safely
newReader = SegmentReader.get(readOnly, infos.info(i), termInfosIndexDivisor);
newReader.readerFinishedListeners = readerFinishedListeners;
readerShared[i] = false;
newReaders[i] = newReader;
} else {
newReader = newReaders[i].reopenSegment(infos.info(i), doClone, readOnly);
if (newReader == null) {
// this reader will be shared between the old and the new one,
// so we must incRef it
readerShared[i] = true;
newReaders[i].incRef();
} else {
assert newReader.readerFinishedListeners == readerFinishedListeners;
readerShared[i] = false;
// Steal ref returned to us by reopenSegment:
newReaders[i] = newReader;
}
}
success = true;
} finally {
if (!success) {
for (i++; i < infos.size(); i++) {
if (newReaders[i] != null) {
try {
if (!readerShared[i]) {
// this is a new subReader that is not used by the old one,
// we can close it
newReaders[i].close();
} else {
// this subReader is also used by the old reader, so instead
// closing we must decRef it
newReaders[i].decRef();
}
} catch (IOException ignore) {
// keep going - we want to clean up as much as possible
}
}
}
}
}
}
// initialize the readers to calculate maxDoc before we try to reuse the old normsCache
initialize(newReaders);
// try to copy unchanged norms from the old normsCache to the new one
if (oldNormsCache != null) {
for (Map.Entry<String, byte[]> entry : oldNormsCache.entrySet()) {
String field = entry.getKey();
if (!hasNorms(field)) {
continue;
}
byte[] oldBytes = entry.getValue();
byte[] bytes = new byte[maxDoc()];
for (int i = 0; i < subReaders.length; i++) {
Integer oldReaderIndex = segmentReaders.get(subReaders[i].getSegmentName());
// this SegmentReader was not re-opened, we can copy all of its norms
if (oldReaderIndex != null
&& (oldReaders[oldReaderIndex.intValue()] == subReaders[i]
|| oldReaders[oldReaderIndex.intValue()].norms.get(field)
== subReaders[i].norms.get(field))) {
// we don't have to synchronize here: either this constructor is called from a
// SegmentReader,
// in which case no old norms cache is present, or it is called from
// MultiReader.reopen(),
// which is synchronized
System.arraycopy(
oldBytes,
oldStarts[oldReaderIndex.intValue()],
bytes,
starts[i],
starts[i + 1] - starts[i]);
} else {
subReaders[i].norms(field, bytes, starts[i]);
}
}
normsCache.put(field, bytes); // update cache
}
}
}
private int getIdx(String name) {
for (int x = 0; x < infos.size(); x++) {
if (name.equals(infos.info(x).name)) return x;
}
return -1;
}
private SegmentInfo getInfo(String name) {
for (int x = 0; x < infos.size(); x++) {
if (name.equals(infos.info(x).name)) return infos.info(x);
}
return null;
}