Java tutorial
/** * Twitter Tools * * Licensed 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 cc.twittertools.index; import it.unimi.dsi.fastutil.longs.LongOpenHashSet; import java.io.BufferedReader; import java.io.File; import java.io.FileInputStream; import java.io.InputStreamReader; import org.apache.commons.cli.CommandLine; import org.apache.commons.cli.CommandLineParser; import org.apache.commons.cli.GnuParser; import org.apache.commons.cli.HelpFormatter; import org.apache.commons.cli.Option; import org.apache.commons.cli.OptionBuilder; import org.apache.commons.cli.Options; import org.apache.commons.cli.ParseException; import org.apache.log4j.Logger; import org.apache.lucene.analysis.Analyzer; import org.apache.lucene.document.Document; import org.apache.lucene.document.Field; import org.apache.lucene.document.Field.Store; import org.apache.lucene.document.FieldType; import org.apache.lucene.document.IntField; import org.apache.lucene.document.LongField; import org.apache.lucene.document.TextField; import org.apache.lucene.index.FieldInfo.IndexOptions; 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.util.Version; import org.apache.tools.bzip2.CBZip2InputStream; import cc.twittertools.corpus.data.JsonStatusCorpusReader; import cc.twittertools.corpus.data.Status; import cc.twittertools.corpus.data.StatusStream; /** * Reference implementation for indexing statuses. */ public class IndexStatuses { private static final Logger LOG = Logger.getLogger(IndexStatuses.class); public static final Analyzer ANALYZER = new TweetAnalyzer(Version.LUCENE_43); public static String corpusFormat = null; private IndexStatuses() { } public static enum StatusField { ID("id"), SCREEN_NAME("screen_name"), EPOCH("epoch"), TEXT("text"), LANG("lang"), IN_REPLY_TO_STATUS_ID( "in_reply_to_status_id"), IN_REPLY_TO_USER_ID("in_reply_to_user_id"), FOLLOWERS_COUNT( "followers_count"), FRIENDS_COUNT("friends_count"), STATUSES_COUNT( "statuses_count"), RETWEETED_STATUS_ID("retweeted_status_id"), RETWEETED_USER_ID( "retweeted_user_id"), RETWEET_COUNT("retweet_count"); public final String name; StatusField(String s) { name = s; } }; private static final String HELP_OPTION = "h"; private static final String COLLECTION_OPTION = "collection"; private static final String INDEX_OPTION = "index"; private static final String MAX_ID_OPTION = "max_id"; private static final String DELETES_OPTION = "deletes"; private static final String OPTIMIZE_OPTION = "optimize"; private static final String STORE_TERM_VECTORS_OPTION = "store"; @SuppressWarnings("static-access") public static void main(String[] args) throws Exception { Options options = new Options(); options.addOption(new Option(HELP_OPTION, "show help")); options.addOption(new Option(OPTIMIZE_OPTION, "merge indexes into a single segment")); options.addOption(new Option(STORE_TERM_VECTORS_OPTION, "store term vectors")); options.addOption(OptionBuilder.withArgName("dir").hasArg().withDescription("source collection directory") .create(COLLECTION_OPTION)); options.addOption( OptionBuilder.withArgName("dir").hasArg().withDescription("index location").create(INDEX_OPTION)); options.addOption(OptionBuilder.withArgName("file").hasArg().withDescription("file with deleted tweetids") .create(DELETES_OPTION)); options.addOption(OptionBuilder.withArgName("id").hasArg().withDescription("max id").create(MAX_ID_OPTION)); CommandLine cmdline = null; CommandLineParser parser = new GnuParser(); try { cmdline = parser.parse(options, args); } catch (ParseException exp) { System.err.println("Error parsing command line: " + exp.getMessage()); System.exit(-1); } if (cmdline.hasOption(HELP_OPTION) || !cmdline.hasOption(COLLECTION_OPTION) || !cmdline.hasOption(INDEX_OPTION)) { HelpFormatter formatter = new HelpFormatter(); formatter.printHelp(IndexStatuses.class.getName(), options); System.exit(-1); } String collectionPath = cmdline.getOptionValue(COLLECTION_OPTION); String indexPath = cmdline.getOptionValue(INDEX_OPTION); final FieldType textOptions = new FieldType(); textOptions.setIndexed(true); textOptions.setIndexOptions(IndexOptions.DOCS_AND_FREQS_AND_POSITIONS); textOptions.setStored(true); textOptions.setTokenized(true); if (cmdline.hasOption(STORE_TERM_VECTORS_OPTION)) { textOptions.setStoreTermVectors(true); } LOG.info("collection: " + collectionPath); LOG.info("index: " + indexPath); LongOpenHashSet deletes = null; if (cmdline.hasOption(DELETES_OPTION)) { deletes = new LongOpenHashSet(); File deletesFile = new File(cmdline.getOptionValue(DELETES_OPTION)); if (!deletesFile.exists()) { System.err.println("Error: " + deletesFile + " does not exist!"); System.exit(-1); } LOG.info("Reading deletes from " + deletesFile); FileInputStream fin = new FileInputStream(deletesFile); byte[] ignoreBytes = new byte[2]; fin.read(ignoreBytes); // "B", "Z" bytes from commandline tools BufferedReader br = new BufferedReader(new InputStreamReader(new CBZip2InputStream(fin))); String s; while ((s = br.readLine()) != null) { if (s.contains("\t")) { deletes.add(Long.parseLong(s.split("\t")[0])); } else { deletes.add(Long.parseLong(s)); } } br.close(); fin.close(); LOG.info("Read " + deletes.size() + " tweetids from deletes file."); } long maxId = Long.MAX_VALUE; if (cmdline.hasOption(MAX_ID_OPTION)) { maxId = Long.parseLong(cmdline.getOptionValue(MAX_ID_OPTION)); LOG.info("index: " + maxId); } long startTime = System.currentTimeMillis(); File file = new File(collectionPath); if (!file.exists()) { System.err.println("Error: " + file + " does not exist!"); System.exit(-1); } StatusStream stream = new JsonStatusCorpusReader(file); Directory dir = FSDirectory.open(new File(indexPath)); IndexWriterConfig config = new IndexWriterConfig(Version.LUCENE_43, IndexStatuses.ANALYZER); config.setOpenMode(OpenMode.CREATE); IndexWriter writer = new IndexWriter(dir, config); int cnt = 0; Status status; try { while ((status = stream.next()) != null) { if (status.getText() == null) { continue; } // Skip deletes tweetids. if (deletes != null && deletes.contains(status.getId())) { continue; } if (status.getId() > maxId) { continue; } cnt++; Document doc = new Document(); doc.add(new LongField(StatusField.ID.name, status.getId(), Field.Store.YES)); doc.add(new LongField(StatusField.EPOCH.name, status.getEpoch(), Field.Store.YES)); doc.add(new TextField(StatusField.SCREEN_NAME.name, status.getScreenname(), Store.YES)); doc.add(new Field(StatusField.TEXT.name, status.getText(), textOptions)); doc.add(new IntField(StatusField.FRIENDS_COUNT.name, status.getFollowersCount(), Store.YES)); doc.add(new IntField(StatusField.FOLLOWERS_COUNT.name, status.getFriendsCount(), Store.YES)); doc.add(new IntField(StatusField.STATUSES_COUNT.name, status.getStatusesCount(), Store.YES)); long inReplyToStatusId = status.getInReplyToStatusId(); if (inReplyToStatusId > 0) { doc.add(new LongField(StatusField.IN_REPLY_TO_STATUS_ID.name, inReplyToStatusId, Field.Store.YES)); doc.add(new LongField(StatusField.IN_REPLY_TO_USER_ID.name, status.getInReplyToUserId(), Field.Store.YES)); } String lang = status.getLang(); if (!lang.equals("unknown")) { doc.add(new TextField(StatusField.LANG.name, status.getLang(), Store.YES)); } long retweetStatusId = status.getRetweetedStatusId(); if (retweetStatusId > 0) { doc.add(new LongField(StatusField.RETWEETED_STATUS_ID.name, retweetStatusId, Field.Store.YES)); doc.add(new LongField(StatusField.RETWEETED_USER_ID.name, status.getRetweetedUserId(), Field.Store.YES)); doc.add(new IntField(StatusField.RETWEET_COUNT.name, status.getRetweetCount(), Store.YES)); if (status.getRetweetCount() < 0 || status.getRetweetedStatusId() < 0) { LOG.warn("Error parsing retweet fields of " + status.getId()); } } writer.addDocument(doc); if (cnt % 100000 == 0) { LOG.info(cnt + " statuses indexed"); } } LOG.info(String.format("Total of %s statuses added", cnt)); if (cmdline.hasOption(OPTIMIZE_OPTION)) { LOG.info("Merging segments..."); writer.forceMerge(1); LOG.info("Done!"); } LOG.info("Total elapsed time: " + (System.currentTimeMillis() - startTime) + "ms"); } catch (Exception e) { e.printStackTrace(); } finally { writer.close(); dir.close(); stream.close(); } } }