SerialMergeScheduler.cs

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/* 
 * 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.
 */

namespace Lucene.Net.Index
{
    
    /// <summary>A <see cref="MergeScheduler" /> that simply does each merge
    /// sequentially, using the current thread. 
    /// </summary>
    public class SerialMergeScheduler:MergeScheduler
    {
        
        /// <summary>Just do the merges in sequence. We do this
        /// "synchronized" so that even if the application is using
        /// multiple threads, only one merge may run at a time. 
        /// </summary>
        public override void  Merge(IndexWriter writer)
        {
            lock (this)
            {
                while (true)
                {
                    MergePolicy.OneMerge merge = writer.GetNextMerge();
                    if (merge == null)
                        break;
                    writer.Merge(merge);
                }
            }
        }

        protected override void Dispose(bool disposing)
        {
        }
    }
}