01: package org.apache.lucene.index;
02:
03: /**
04: * Licensed to the Apache Software Foundation (ASF) under one or more
05: * contributor license agreements. See the NOTICE file distributed with
06: * this work for additional information regarding copyright ownership.
07: * The ASF licenses this file to You under the Apache License, Version 2.0
08: * (the "License"); you may not use this file except in compliance with
09: * the License. You may obtain a copy of the License at
10: *
11: * http://www.apache.org/licenses/LICENSE-2.0
12: *
13: * Unless required by applicable law or agreed to in writing, software
14: * distributed under the License is distributed on an "AS IS" BASIS,
15: * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16: * See the License for the specific language governing permissions and
17: * limitations under the License.
18: */
19:
20: import java.io.IOException;
21:
22: /** A {@link MergeScheduler} that simply does each merge
23: * sequentially, using the current thread. */
24: public class SerialMergeScheduler extends MergeScheduler {
25:
26: /** Just do the merges in sequence. We do this
27: * "synchronized" so that even if the application is using
28: * multiple threads, only one merge may run at a time. */
29: synchronized public void merge(IndexWriter writer)
30: throws CorruptIndexException, IOException {
31:
32: while (true) {
33: MergePolicy.OneMerge merge = writer.getNextMerge();
34: if (merge == null)
35: break;
36: writer.merge(merge);
37: }
38: }
39:
40: public void close() {
41: }
42: }
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