| using System.Runtime.CompilerServices; |
| |
| 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. |
| */ |
| |
| /// <summary> |
| /// A <see cref="MergeScheduler"/> which never executes any merges. It is also a |
| /// singleton and can be accessed through <see cref="NoMergeScheduler.INSTANCE"/>. Use |
| /// it if you want to prevent an <see cref="IndexWriter"/> from ever executing merges, |
| /// regardless of the <see cref="MergePolicy"/> used. Note that you can achieve the |
| /// same thing by using <see cref="NoMergePolicy"/>, however with |
| /// <see cref="NoMergeScheduler"/> you also ensure that no unnecessary code of any |
| /// <see cref="MergeScheduler"/> implementation is ever executed. Hence it is |
| /// recommended to use both if you want to disable merges from ever happening. |
| /// </summary> |
| public sealed class NoMergeScheduler : MergeScheduler |
| { |
| /// <summary> |
| /// The single instance of <see cref="NoMergeScheduler"/> </summary> |
| public static readonly MergeScheduler INSTANCE = new NoMergeScheduler(); |
| |
| private NoMergeScheduler() |
| { |
| // prevent instantiation |
| } |
| |
| protected override void Dispose(bool disposing) |
| { |
| } |
| |
| [MethodImpl(MethodImplOptions.NoInlining)] |
| public override void Merge(IndexWriter writer, MergeTrigger trigger, bool newMergesFound) |
| { |
| } |
| |
| public override object Clone() |
| { |
| return this; |
| } |
| } |
| } |