| 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_SIZE; |
| |
| import java.io.IOException; |
| import java.util.Iterator; |
| import java.util.NoSuchElementException; |
| |
| import org.apache.lucene.codecs.DocValuesConsumer; |
| import org.apache.lucene.util.ByteBlockPool; |
| import org.apache.lucene.util.BytesRef; |
| import org.apache.lucene.util.BytesRefHash.DirectBytesStartArray; |
| import org.apache.lucene.util.BytesRefHash; |
| import org.apache.lucene.util.Counter; |
| import org.apache.lucene.util.RamUsageEstimator; |
| import org.apache.lucene.util.packed.PackedInts; |
| import org.apache.lucene.util.packed.PackedLongValues; |
| |
| /** Buffers up pending byte[] per doc, deref and sorting via |
| * int ord, then flushes when segment flushes. */ |
| class SortedDocValuesWriter extends DocValuesWriter { |
| final BytesRefHash hash; |
| private PackedLongValues.Builder pending; |
| private final Counter iwBytesUsed; |
| private long bytesUsed; // this currently only tracks differences in 'pending' |
| private final FieldInfo fieldInfo; |
| |
| private static final int EMPTY_ORD = -1; |
| |
| public SortedDocValuesWriter(FieldInfo fieldInfo, Counter iwBytesUsed) { |
| this.fieldInfo = fieldInfo; |
| this.iwBytesUsed = iwBytesUsed; |
| hash = new BytesRefHash( |
| new ByteBlockPool( |
| new ByteBlockPool.DirectTrackingAllocator(iwBytesUsed)), |
| BytesRefHash.DEFAULT_CAPACITY, |
| new DirectBytesStartArray(BytesRefHash.DEFAULT_CAPACITY, iwBytesUsed)); |
| pending = PackedLongValues.deltaPackedBuilder(PackedInts.COMPACT); |
| bytesUsed = pending.ramBytesUsed(); |
| iwBytesUsed.addAndGet(bytesUsed); |
| } |
| |
| public void addValue(int docID, BytesRef value) { |
| if (docID < pending.size()) { |
| throw new IllegalArgumentException("DocValuesField \"" + fieldInfo.name + "\" appears more than once in this document (only one value is allowed per field)"); |
| } |
| if (value == null) { |
| throw new IllegalArgumentException("field \"" + fieldInfo.name + "\": null value not allowed"); |
| } |
| if (value.length > (BYTE_BLOCK_SIZE - 2)) { |
| throw new IllegalArgumentException("DocValuesField \"" + fieldInfo.name + "\" is too large, must be <= " + (BYTE_BLOCK_SIZE - 2)); |
| } |
| |
| // Fill in any holes: |
| while(pending.size() < docID) { |
| pending.add(EMPTY_ORD); |
| } |
| |
| addOneValue(value); |
| } |
| |
| @Override |
| public void finish(int maxDoc) { |
| while(pending.size() < maxDoc) { |
| pending.add(EMPTY_ORD); |
| } |
| updateBytesUsed(); |
| } |
| |
| private void addOneValue(BytesRef value) { |
| int termID = hash.add(value); |
| if (termID < 0) { |
| termID = -termID-1; |
| } else { |
| // reserve additional space for each unique value: |
| // 1. when indexing, when hash is 50% full, rehash() suddenly needs 2*size ints. |
| // TODO: can this same OOM happen in THPF? |
| // 2. when flushing, we need 1 int per value (slot in the ordMap). |
| iwBytesUsed.addAndGet(2 * RamUsageEstimator.NUM_BYTES_INT); |
| } |
| |
| pending.add(termID); |
| updateBytesUsed(); |
| } |
| |
| private void updateBytesUsed() { |
| final long newBytesUsed = pending.ramBytesUsed(); |
| iwBytesUsed.addAndGet(newBytesUsed - bytesUsed); |
| bytesUsed = newBytesUsed; |
| } |
| |
| @Override |
| public void flush(SegmentWriteState state, DocValuesConsumer dvConsumer) throws IOException { |
| final int maxDoc = state.segmentInfo.getDocCount(); |
| |
| assert pending.size() == maxDoc; |
| final int valueCount = hash.size(); |
| final PackedLongValues ords = pending.build(); |
| |
| final int[] sortedValues = hash.sort(BytesRef.getUTF8SortedAsUnicodeComparator()); |
| final int[] ordMap = new int[valueCount]; |
| |
| for(int ord=0;ord<valueCount;ord++) { |
| ordMap[sortedValues[ord]] = ord; |
| } |
| |
| dvConsumer.addSortedField(fieldInfo, |
| |
| // ord -> value |
| new Iterable<BytesRef>() { |
| @Override |
| public Iterator<BytesRef> iterator() { |
| return new ValuesIterator(sortedValues, valueCount, hash); |
| } |
| }, |
| |
| // doc -> ord |
| new Iterable<Number>() { |
| @Override |
| public Iterator<Number> iterator() { |
| return new OrdsIterator(ordMap, maxDoc, ords); |
| } |
| }); |
| } |
| |
| // iterates over the unique values we have in ram |
| private static class ValuesIterator implements Iterator<BytesRef> { |
| final int sortedValues[]; |
| final BytesRefHash hash; |
| final BytesRef scratch = new BytesRef(); |
| final int valueCount; |
| int ordUpto; |
| |
| ValuesIterator(int sortedValues[], int valueCount, BytesRefHash hash) { |
| this.sortedValues = sortedValues; |
| this.valueCount = valueCount; |
| this.hash = hash; |
| } |
| |
| @Override |
| public boolean hasNext() { |
| return ordUpto < valueCount; |
| } |
| |
| @Override |
| public BytesRef next() { |
| if (!hasNext()) { |
| throw new NoSuchElementException(); |
| } |
| hash.get(sortedValues[ordUpto], scratch); |
| ordUpto++; |
| return scratch; |
| } |
| |
| @Override |
| public void remove() { |
| throw new UnsupportedOperationException(); |
| } |
| } |
| |
| // iterates over the ords for each doc we have in ram |
| private static class OrdsIterator implements Iterator<Number> { |
| final PackedLongValues.Iterator iter; |
| final int ordMap[]; |
| final int maxDoc; |
| int docUpto; |
| |
| OrdsIterator(int ordMap[], int maxDoc, PackedLongValues ords) { |
| this.ordMap = ordMap; |
| this.maxDoc = maxDoc; |
| assert ords.size() == maxDoc; |
| this.iter = ords.iterator(); |
| } |
| |
| @Override |
| public boolean hasNext() { |
| return docUpto < maxDoc; |
| } |
| |
| @Override |
| public Number next() { |
| if (!hasNext()) { |
| throw new NoSuchElementException(); |
| } |
| int ord = (int) iter.next(); |
| docUpto++; |
| return ord == -1 ? ord : ordMap[ord]; |
| } |
| |
| @Override |
| public void remove() { |
| throw new UnsupportedOperationException(); |
| } |
| } |
| } |