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: /** Expert: {@link IndexWriter} uses an instance
23: * implementing this interface to execute the merges
24: * selected by a {@link MergePolicy}. The default
25: * MergeScheduler is {@link ConcurrentMergeScheduler}.
26: * <p><b>NOTE:</b> This API is new and still experimental
27: * (subject to change suddenly in the next release)</p>
28: */
29:
30: public abstract class MergeScheduler {
31:
32: /** Run the merges provided by {@link IndexWriter#getNextMerge()}. */
33: abstract void merge(IndexWriter writer)
34: throws CorruptIndexException, IOException;
35:
36: /** Close this MergeScheduler. */
37: abstract void close() throws CorruptIndexException, IOException;
38: }
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