| using J2N.Collections.Generic.Extensions; |
| using Lucene.Net.Diagnostics; |
| using Lucene.Net.Util; |
| using System; |
| using System.Collections.Generic; |
| using System.Globalization; |
| |
| namespace Lucene.Net.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. |
| */ |
| |
| using Directory = Lucene.Net.Store.Directory; |
| using DocValuesFormat = Lucene.Net.Codecs.DocValuesFormat; |
| using DocValuesProducer = Lucene.Net.Codecs.DocValuesProducer; |
| using IOContext = Lucene.Net.Store.IOContext; |
| using IOUtils = Lucene.Net.Util.IOUtils; |
| |
| /// <summary> |
| /// Manages the <see cref="DocValuesProducer"/> held by <see cref="SegmentReader"/> and |
| /// keeps track of their reference counting. |
| /// </summary> |
| internal sealed class SegmentDocValues |
| { |
| private readonly IDictionary<long?, RefCount<DocValuesProducer>> genDVProducers = new Dictionary<long?, RefCount<DocValuesProducer>>(); |
| |
| private RefCount<DocValuesProducer> NewDocValuesProducer(SegmentCommitInfo si, IOContext context, Directory dir, DocValuesFormat dvFormat, long? gen, IList<FieldInfo> infos, int termsIndexDivisor) |
| { |
| Directory dvDir = dir; |
| string segmentSuffix = ""; |
| if ((long)gen != -1) |
| { |
| dvDir = si.Info.Dir; // gen'd files are written outside CFS, so use SegInfo directory |
| segmentSuffix = ((long)gen).ToString(CultureInfo.InvariantCulture);//Convert.ToString((long)gen, Character.MAX_RADIX); |
| } |
| |
| // set SegmentReadState to list only the fields that are relevant to that gen |
| SegmentReadState srs = new SegmentReadState(dvDir, si.Info, new FieldInfos(infos.ToArray()), context, termsIndexDivisor, segmentSuffix); |
| return new RefCountHelper(this, dvFormat.FieldsProducer(srs), gen); |
| } |
| |
| private class RefCountHelper : RefCount<DocValuesProducer> |
| { |
| private readonly SegmentDocValues outerInstance; |
| private long? gen; |
| |
| public RefCountHelper(SegmentDocValues outerInstance, DocValuesProducer fieldsProducer, long? gen) |
| : base(fieldsProducer) |
| { |
| this.outerInstance = outerInstance; |
| this.gen = gen; |
| } |
| |
| protected override void Release() |
| { |
| m_object.Dispose(); |
| lock (outerInstance) |
| { |
| outerInstance.genDVProducers.Remove(gen); |
| } |
| } |
| } |
| |
| /// <summary> |
| /// Returns the <see cref="DocValuesProducer"/> for the given generation. </summary> |
| internal DocValuesProducer GetDocValuesProducer(long? gen, SegmentCommitInfo si, IOContext context, Directory dir, DocValuesFormat dvFormat, IList<FieldInfo> infos, int termsIndexDivisor) |
| { |
| lock (this) |
| { |
| RefCount<DocValuesProducer> dvp; |
| if (!(genDVProducers.TryGetValue(gen, out dvp))) |
| { |
| dvp = NewDocValuesProducer(si, context, dir, dvFormat, gen, infos, termsIndexDivisor); |
| if (Debugging.AssertsEnabled) Debugging.Assert(dvp != null); |
| genDVProducers[gen] = dvp; |
| } |
| else |
| { |
| dvp.IncRef(); |
| } |
| return dvp.Get(); |
| } |
| } |
| |
| /// <summary> |
| /// Decrement the reference count of the given <see cref="DocValuesProducer"/> |
| /// generations. |
| /// </summary> |
| internal void DecRef(IList<long?> dvProducersGens) |
| { |
| lock (this) |
| { |
| Exception t = null; |
| foreach (long? gen in dvProducersGens) |
| { |
| RefCount<DocValuesProducer> dvp = genDVProducers[gen]; |
| if (Debugging.AssertsEnabled) Debugging.Assert(dvp != null, () => "gen=" + gen); |
| try |
| { |
| dvp.DecRef(); |
| } |
| catch (Exception th) |
| { |
| if (t != null) |
| { |
| t = th; |
| } |
| } |
| } |
| if (t != null) |
| { |
| IOUtils.ReThrow(t); |
| } |
| } |
| } |
| } |
| } |