zhaih commented on a change in pull request #2246: URL: https://github.com/apache/lucene-solr/pull/2246#discussion_r564724657
########## File path: lucene/misc/src/java/org/apache/lucene/misc/index/IndexRearranger.java ########## @@ -0,0 +1,132 @@ +/* + * 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.index; + +import java.io.IOException; +import java.util.ArrayList; +import java.util.List; +import java.util.concurrent.Callable; +import java.util.concurrent.ExecutorService; +import java.util.concurrent.Executors; +import java.util.concurrent.Future; +import org.apache.lucene.index.CodecReader; +import org.apache.lucene.index.DirectoryReader; +import org.apache.lucene.index.FilterCodecReader; +import org.apache.lucene.index.IndexReader; +import org.apache.lucene.index.IndexWriter; +import org.apache.lucene.index.IndexWriterConfig; +import org.apache.lucene.index.LeafReaderContext; +import org.apache.lucene.index.NoMergePolicy; +import org.apache.lucene.store.Directory; +import org.apache.lucene.util.BitSet; +import org.apache.lucene.util.Bits; +import org.apache.lucene.util.NamedThreadFactory; + +/** + * Copy and rearrange index according to document selectors, from input dir to output dir Length of + * documentSelectors determines how many segments there will be + */ +public class IndexRearranger { + protected final Directory input, output; + protected final IndexWriterConfig config; + protected final List<DocumentSelector> documentSelectors; + + public IndexRearranger( + Directory input, + Directory output, + IndexWriterConfig config, + List<DocumentSelector> documentSelectors) { + this.input = input; + this.output = output; + this.config = config; + this.documentSelectors = documentSelectors; + } + + public void execute() throws Exception { + config.setMergePolicy( + NoMergePolicy.INSTANCE); // do not merge since one addIndexes call create one segment + try (IndexWriter writer = new IndexWriter(output, config); + IndexReader reader = DirectoryReader.open(input)) { + ExecutorService executor = + Executors.newFixedThreadPool( + Math.min(Runtime.getRuntime().availableProcessors(), documentSelectors.size()), + new NamedThreadFactory("rearranger")); + ArrayList<Future<Void>> futures = new ArrayList<>(); + for (DocumentSelector record : documentSelectors) { + Callable<Void> addSegment = + () -> { + addOneSegment(writer, reader, record); + return null; + }; + futures.add(executor.submit(addSegment)); + } + for (Future<Void> future : futures) { + future.get(); + } + executor.shutdown(); + } + } + + private static void addOneSegment(IndexWriter writer, IndexReader reader, DocumentSelector record) Review comment: Ah good catch. Previously I named `DocumentSelector` as `SegmentRecord` and forgot to change this one after renaming. ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org --------------------------------------------------------------------- To unsubscribe, e-mail: issues-unsubscr...@lucene.apache.org For additional commands, e-mail: issues-h...@lucene.apache.org
