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TrackingIndexWriter.cs
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TrackingIndexWriter.cs
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using J2N.Threading.Atomic;
using System.Collections.Generic;
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 Analyzer = Lucene.Net.Analysis.Analyzer;
using Directory = Lucene.Net.Store.Directory;
using Query = Lucene.Net.Search.Query;
/// <summary>
/// Class that tracks changes to a delegated
/// <see cref="Index.IndexWriter"/>, used by
/// <see cref="Search.ControlledRealTimeReopenThread{T}"/> to ensure specific
/// changes are visible. Create this class (passing your
/// <see cref="Index.IndexWriter"/>), and then pass this class to
/// <see cref="Search.ControlledRealTimeReopenThread{T}"/>.
/// Be sure to make all changes via the
/// <see cref="TrackingIndexWriter"/>, otherwise
/// <see cref="Search.ControlledRealTimeReopenThread{T}"/> won't know about the changes.
/// <para/>
/// @lucene.experimental
/// </summary>
public class TrackingIndexWriter
{
private readonly IndexWriter writer;
private readonly AtomicInt64 indexingGen = new AtomicInt64(1);
/// <summary>
/// Create a <see cref="TrackingIndexWriter"/> wrapping the
/// provided <see cref="Index.IndexWriter"/>.
/// </summary>
public TrackingIndexWriter(IndexWriter writer)
{
this.writer = writer;
}
/// <summary>
/// Calls
/// <see cref="IndexWriter.UpdateDocument(Term, IEnumerable{IIndexableField}, Analyzer)"/>
/// and returns the generation that reflects this change.
/// </summary>
public virtual long UpdateDocument(Term t, IEnumerable<IIndexableField> d, Analyzer a)
{
writer.UpdateDocument(t, d, a);
// Return gen as of when indexing finished:
return indexingGen;
}
/// <summary>
/// Calls
/// <see cref="IndexWriter.UpdateDocument(Term, IEnumerable{IIndexableField})"/> and
/// returns the generation that reflects this change.
/// </summary>
public virtual long UpdateDocument(Term t, IEnumerable<IIndexableField> d)
{
writer.UpdateDocument(t, d);
// Return gen as of when indexing finished:
return indexingGen;
}
/// <summary>
/// Calls
/// <see cref="IndexWriter.UpdateDocuments(Term, IEnumerable{IEnumerable{IIndexableField}}, Analyzer)"/>
/// and returns the generation that reflects this change.
/// </summary>
public virtual long UpdateDocuments(Term t, IEnumerable<IEnumerable<IIndexableField>> docs, Analyzer a)
{
writer.UpdateDocuments(t, docs, a);
// Return gen as of when indexing finished:
return indexingGen;
}
/// <summary>
/// Calls
/// <see cref="IndexWriter.UpdateDocuments(Term, IEnumerable{IEnumerable{IIndexableField}})"/> and returns
/// the generation that reflects this change.
/// </summary>
public virtual long UpdateDocuments(Term t, IEnumerable<IEnumerable<IIndexableField>> docs)
{
writer.UpdateDocuments(t, docs);
// Return gen as of when indexing finished:
return indexingGen;
}
/// <summary>
/// Calls <see cref="IndexWriter.DeleteDocuments(Term)"/> and
/// returns the generation that reflects this change.
/// </summary>
public virtual long DeleteDocuments(Term t)
{
writer.DeleteDocuments(t);
// Return gen as of when indexing finished:
return indexingGen;
}
/// <summary>
/// Calls <see cref="IndexWriter.DeleteDocuments(Term[])"/> and
/// returns the generation that reflects this change.
/// </summary>
public virtual long DeleteDocuments(params Term[] terms)
{
writer.DeleteDocuments(terms);
// Return gen as of when indexing finished:
return indexingGen;
}
/// <summary>
/// Calls <see cref="IndexWriter.DeleteDocuments(Query)"/> and
/// returns the generation that reflects this change.
/// </summary>
public virtual long DeleteDocuments(Query q)
{
writer.DeleteDocuments(q);
// Return gen as of when indexing finished:
return indexingGen;
}
/// <summary>
/// Calls <see cref="IndexWriter.DeleteDocuments(Query[])"/>
/// and returns the generation that reflects this change.
/// </summary>
public virtual long DeleteDocuments(params Query[] queries)
{
writer.DeleteDocuments(queries);
// Return gen as of when indexing finished:
return indexingGen;
}
/// <summary>
/// Calls <see cref="IndexWriter.DeleteAll()"/> and returns the
/// generation that reflects this change.
/// </summary>
public virtual long DeleteAll()
{
writer.DeleteAll();
// Return gen as of when indexing finished:
return indexingGen;
}
/// <summary>
/// Calls
/// <see cref="IndexWriter.AddDocument(IEnumerable{IIndexableField}, Analyzer)"/> and
/// returns the generation that reflects this change.
/// </summary>
public virtual long AddDocument(IEnumerable<IIndexableField> d, Analyzer a)
{
writer.AddDocument(d, a);
// Return gen as of when indexing finished:
return indexingGen;
}
/// <summary>
/// Calls
/// <see cref="IndexWriter.AddDocuments(IEnumerable{IEnumerable{IIndexableField}}, Analyzer)"/> and
/// returns the generation that reflects this change.
/// </summary>
public virtual long AddDocuments(IEnumerable<IEnumerable<IIndexableField>> docs, Analyzer a)
{
writer.AddDocuments(docs, a);
// Return gen as of when indexing finished:
return indexingGen;
}
/// <summary>
/// Calls <see cref="IndexWriter.AddDocument(IEnumerable{IIndexableField})"/>
/// and returns the generation that reflects this change.
/// </summary>
public virtual long AddDocument(IEnumerable<IIndexableField> d)
{
writer.AddDocument(d);
// Return gen as of when indexing finished:
return indexingGen;
}
/// <summary>
/// Calls <see cref="IndexWriter.AddDocuments(IEnumerable{IEnumerable{IIndexableField}})"/> and
/// returns the generation that reflects this change.
/// </summary>
public virtual long AddDocuments(IEnumerable<IEnumerable<IIndexableField>> docs)
{
writer.AddDocuments(docs);
// Return gen as of when indexing finished:
return indexingGen;
}
/// <summary>
/// Calls <see cref="IndexWriter.AddIndexes(Directory[])"/> and
/// returns the generation that reflects this change.
/// </summary>
public virtual long AddIndexes(params Directory[] dirs)
{
writer.AddIndexes(dirs);
// Return gen as of when indexing finished:
return indexingGen;
}
/// <summary>
/// Calls <see cref="IndexWriter.AddIndexes(IndexReader[])"/>
/// and returns the generation that reflects this change.
/// </summary>
public virtual long AddIndexes(params IndexReader[] readers)
{
writer.AddIndexes(readers);
// Return gen as of when indexing finished:
return indexingGen;
}
/// <summary>
/// Return the current generation being indexed. </summary>
public virtual long Generation => indexingGen;
/// <summary>
/// Return the wrapped <see cref="Index.IndexWriter"/>. </summary>
public virtual IndexWriter IndexWriter => writer;
/// <summary>
/// Return and increment current gen.
/// <para/>
/// @lucene.internal
/// </summary>
public virtual long GetAndIncrementGeneration()
{
return indexingGen.GetAndIncrement();
}
/// <summary>
/// Cals
/// <see cref="IndexWriter.TryDeleteDocument(IndexReader, int)"/> and
/// returns the generation that reflects this change.
/// </summary>
public virtual long TryDeleteDocument(IndexReader reader, int docID)
{
if (writer.TryDeleteDocument(reader, docID))
{
return indexingGen;
}
else
{
return -1;
}
}
}
}