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IndexMergeTool.java
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IndexMergeTool.java
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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.
*/
package org.apache.lucene.misc;
import org.apache.lucene.index.IndexWriter;
import org.apache.lucene.index.IndexWriterConfig;
import org.apache.lucene.index.IndexWriterConfig.OpenMode;
import org.apache.lucene.store.Directory;
import org.apache.lucene.store.FSDirectory;
import org.apache.lucene.store.HardlinkCopyDirectoryWrapper;
import org.apache.lucene.util.SuppressForbidden;
import java.io.IOException;
import java.nio.file.Paths;
/**
* Merges indices specified on the command line into the index
* specified as the first command line argument.
*/
@SuppressForbidden(reason = "System.out required: command line tool")
public class IndexMergeTool {
public static void main(String[] args) throws IOException {
if (args.length < 3) {
System.err.println("Usage: IndexMergeTool <mergedIndex> <index1> <index2> [index3] ...");
System.exit(1);
}
// Try to use hardlinks to source segments, if possible.
Directory mergedIndex = new HardlinkCopyDirectoryWrapper(FSDirectory.open(Paths.get(args[0])));
IndexWriter writer = new IndexWriter(mergedIndex,
new IndexWriterConfig(null).setOpenMode(OpenMode.CREATE));
Directory[] indexes = new Directory[args.length - 1];
for (int i = 1; i < args.length; i++) {
indexes[i - 1] = FSDirectory.open(Paths.get(args[i]));
}
System.out.println("Merging...");
writer.addIndexes(indexes);
System.out.println("Full merge...");
writer.forceMerge(1);
writer.close();
System.out.println("Done.");
}
}