| /* |
| * 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. |
| */ |
| package org.apache.lucene.index; |
| |
| import java.io.IOException; |
| |
| /** A {@link MergeScheduler} that simply does each merge sequentially, using the current thread. */ |
| public class SerialMergeScheduler extends MergeScheduler { |
| |
| /** Sole constructor. */ |
| public SerialMergeScheduler() {} |
| |
| /** |
| * 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. |
| */ |
| @Override |
| public synchronized void merge(MergeSource mergeSource, MergeTrigger trigger) throws IOException { |
| while (true) { |
| MergePolicy.OneMerge merge = mergeSource.getNextMerge(); |
| if (merge == null) { |
| break; |
| } |
| mergeSource.merge(merge); |
| } |
| } |
| |
| @Override |
| public void close() {} |
| } |