+++ /dev/null
-package org.apache.lucene.index;
-
-/**
- * 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.
- */
-
-import org.apache.lucene.store.Directory;
-import org.apache.lucene.store.FSDirectory;
-import org.apache.lucene.util.Constants;
-import org.apache.lucene.util.Version;
-
-import java.io.File;
-import java.io.IOException;
-import java.io.PrintStream;
-import java.util.Collection;
-
-/**
- * This is an easy-to-use tool that upgrades all segments of an index from previous Lucene versions
- * to the current segment file format. It can be used from command line:
- * <pre>
- * java -cp lucene-core.jar org.apache.lucene.index.IndexUpgrader [-delete-prior-commits] [-verbose] indexDir
- * </pre>
- * Alternatively this class can be instantiated and {@link #upgrade} invoked. It uses {@link UpgradeIndexMergePolicy}
- * and triggers the upgrade via an optimize request to {@link IndexWriter}.
- * <p>This tool keeps only the last commit in an index; for this
- * reason, if the incoming index has more than one commit, the tool
- * refuses to run by default. Specify {@code -delete-prior-commits}
- * to override this, allowing the tool to delete all but the last commit.
- * From Java code this can be enabled by passing {@code true} to
- * {@link #IndexUpgrader(Directory,Version,PrintStream,boolean)}.
- * <p><b>Warning:</b> This tool may reorder documents if the index was partially
- * upgraded before execution (e.g., documents were added). If your application relies
- * on "monotonicity" of doc IDs (which means that the order in which the documents
- * were added to the index is preserved), do a full optimize instead.
- * The {@link MergePolicy} set by {@link IndexWriterConfig} may also reorder
- * documents.
- */
-public final class IndexUpgrader {
-
- private static void printUsage() {
- System.err.println("Upgrades an index so all segments created with a previous Lucene version are rewritten.");
- System.err.println("Usage:");
- System.err.println(" java " + IndexUpgrader.class.getName() + " [-delete-prior-commits] [-verbose] indexDir");
- System.err.println("This tool keeps only the last commit in an index; for this");
- System.err.println("reason, if the incoming index has more than one commit, the tool");
- System.err.println("refuses to run by default. Specify -delete-prior-commits to override");
- System.err.println("this, allowing the tool to delete all but the last commit.");
- System.err.println("WARNING: This tool may reorder document IDs!");
- System.exit(1);
- }
-
- @SuppressWarnings("deprecation")
- public static void main(String[] args) throws IOException {
- String dir = null;
- boolean deletePriorCommits = false;
- PrintStream out = null;
- for (String arg : args) {
- if ("-delete-prior-commits".equals(arg)) {
- deletePriorCommits = true;
- } else if ("-verbose".equals(arg)) {
- out = System.out;
- } else if (dir == null) {
- dir = arg;
- } else {
- printUsage();
- }
- }
- if (dir == null) {
- printUsage();
- }
-
- new IndexUpgrader(FSDirectory.open(new File(dir)), Version.LUCENE_CURRENT, out, deletePriorCommits).upgrade();
- }
-
- private final Directory dir;
- private final PrintStream infoStream;
- private final IndexWriterConfig iwc;
- private final boolean deletePriorCommits;
-
- /** Creates index upgrader on the given directory, using an {@link IndexWriter} using the given
- * {@code matchVersion}. The tool refuses to upgrade indexes with multiple commit points. */
- public IndexUpgrader(Directory dir, Version matchVersion) {
- this(dir, new IndexWriterConfig(matchVersion, null), null, false);
- }
-
- /** Creates index upgrader on the given directory, using an {@link IndexWriter} using the given
- * {@code matchVersion}. You have the possibility to upgrade indexes with multiple commit points by removing
- * all older ones. If {@code infoStream} is not {@code null}, all logging output will be sent to this stream. */
- public IndexUpgrader(Directory dir, Version matchVersion, PrintStream infoStream, boolean deletePriorCommits) {
- this(dir, new IndexWriterConfig(matchVersion, null), infoStream, deletePriorCommits);
- }
-
- /** Creates index upgrader on the given directory, using an {@link IndexWriter} using the given
- * config. You have the possibility to upgrade indexes with multiple commit points by removing
- * all older ones. If {@code infoStream} is not {@code null}, all logging output will be sent to this stream. */
- public IndexUpgrader(Directory dir, IndexWriterConfig iwc, PrintStream infoStream, boolean deletePriorCommits) {
- this.dir = dir;
- this.iwc = iwc;
- this.infoStream = infoStream;
- this.deletePriorCommits = deletePriorCommits;
- }
-
- public void upgrade() throws IOException {
- if (!IndexReader.indexExists(dir)) {
- throw new IndexNotFoundException(dir.toString());
- }
-
- if (!deletePriorCommits) {
- final Collection<IndexCommit> commits = IndexReader.listCommits(dir);
- if (commits.size() > 1) {
- throw new IllegalArgumentException("This tool was invoked to not delete prior commit points, but the following commits were found: " + commits);
- }
- }
-
- final IndexWriterConfig c = (IndexWriterConfig) iwc.clone();
- c.setMergePolicy(new UpgradeIndexMergePolicy(c.getMergePolicy()));
- c.setIndexDeletionPolicy(new KeepOnlyLastCommitDeletionPolicy());
-
- final IndexWriter w = new IndexWriter(dir, c);
- try {
- w.setInfoStream(infoStream);
- w.message("Upgrading all pre-" + Constants.LUCENE_MAIN_VERSION + " segments of index directory '" + dir + "' to version " + Constants.LUCENE_MAIN_VERSION + "...");
- w.optimize();
- w.message("All segments upgraded to version " + Constants.LUCENE_MAIN_VERSION);
- } finally {
- w.close();
- }
- }
-
-}
fnp / pylucene.git / blobdiff