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Lucene example source code file (TestNRTThreads.java)

This example Lucene source code file (TestNRTThreads.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Lucene tags/keywords

arraylist, atomicinteger, atomicinteger, document, field, io, list, subdocs, term, term, termquery, termquery, thread, threading, threads, util, verbose, verbose

The Lucene TestNRTThreads.java source code

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 java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicBoolean;
import java.util.concurrent.atomic.AtomicInteger;

import org.apache.lucene.analysis.MockAnalyzer;
import org.apache.lucene.document.Document;
import org.apache.lucene.document.Field;
import org.apache.lucene.document.Fieldable;
import org.apache.lucene.search.IndexSearcher;
import org.apache.lucene.search.PhraseQuery;
import org.apache.lucene.search.Query;
import org.apache.lucene.search.ScoreDoc;
import org.apache.lucene.search.Sort;
import org.apache.lucene.search.SortField;
import org.apache.lucene.search.TermQuery;
import org.apache.lucene.search.TopDocs;
import org.apache.lucene.store.MockDirectoryWrapper;
import org.apache.lucene.util.LineFileDocs;
import org.apache.lucene.util.LuceneTestCase;
import org.apache.lucene.util._TestUtil;
import org.junit.Test;

// TODO
//   - mix in optimize, addIndexes
//   - randomoly mix in non-congruent docs

public class TestNRTThreads extends LuceneTestCase {

  private static class SubDocs {
    public final String packID;
    public final List<String> subIDs;
    public boolean deleted;

    public SubDocs(String packID, List<String> subIDs) {
      this.packID = packID;
      this.subIDs = subIDs;
    }
  }

  // TODO: is there a pre-existing way to do this!!!
  private Document cloneDoc(Document doc1) {
    final Document doc2 = new Document();
    for(Fieldable f : doc1.getFields()) {
      Field field1 = (Field) f;
      
      Field field2 = new Field(field1.name(),
                               field1.stringValue(),
                               field1.isStored() ? Field.Store.YES : Field.Store.NO,
                               field1.isIndexed() ? (field1.isTokenized() ? Field.Index.ANALYZED : Field.Index.NOT_ANALYZED) : Field.Index.NO);
      if (field1.getOmitNorms()) {
        field2.setOmitNorms(true);
      }
      if (field1.getOmitTermFreqAndPositions()) {
        field2.setOmitTermFreqAndPositions(true);
      }
      doc2.add(field2);
    }

    return doc2;
  }

  @Test
  public void testNRTThreads() throws Exception {

    final long t0 = System.currentTimeMillis();

    final LineFileDocs docs = new LineFileDocs(random);
    final File tempDir = _TestUtil.getTempDir("nrtopenfiles");
    final MockDirectoryWrapper dir = newFSDirectory(tempDir);
    dir.setCheckIndexOnClose(false); // don't double-checkIndex, we do it ourselves.
    final IndexWriterConfig conf = newIndexWriterConfig(TEST_VERSION_CURRENT, new MockAnalyzer(random));
    conf.setMergedSegmentWarmer(new IndexWriter.IndexReaderWarmer() {
      @Override
      public void warm(IndexReader reader) throws IOException {
        if (VERBOSE) {
          System.out.println("TEST: now warm merged reader=" + reader);
        }
        final int maxDoc = reader.maxDoc();
        int sum = 0;
        final int inc = Math.max(1, maxDoc/50);
        for(int docID=0;docID<maxDoc;docID += inc) {
          if (reader.isDeleted(docID)) {
            final Document doc = reader.document(docID);
            sum += doc.getFields().size();
          }
        }

        IndexSearcher searcher = newSearcher(reader);
        sum += searcher.search(new TermQuery(new Term("body", "united")), 10).totalHits;
        searcher.close();

        if (VERBOSE) {
          System.out.println("TEST: warm visited " + sum + " fields");
        }
      }
      });
    
    final IndexWriter writer = new IndexWriter(dir, conf);
    if (VERBOSE) {
      writer.setInfoStream(System.out);
    }
    _TestUtil.reduceOpenFiles(writer);

    final int NUM_INDEX_THREADS = 2;
    final int NUM_SEARCH_THREADS = 3;

    final int RUN_TIME_SEC = LuceneTestCase.TEST_NIGHTLY ? 300 : RANDOM_MULTIPLIER;

    final AtomicBoolean failed = new AtomicBoolean();
    final AtomicInteger addCount = new AtomicInteger();
    final AtomicInteger delCount = new AtomicInteger();
    final AtomicInteger packCount = new AtomicInteger();

    final Set<String> delIDs = Collections.synchronizedSet(new HashSet());
    final List<SubDocs> allSubDocs = Collections.synchronizedList(new ArrayList());

    final long stopTime = System.currentTimeMillis() + RUN_TIME_SEC*1000;
    Thread[] threads = new Thread[NUM_INDEX_THREADS];
    for(int thread=0;thread<NUM_INDEX_THREADS;thread++) {
      threads[thread] = new Thread() {
          @Override
          public void run() {
            // TODO: would be better if this were cross thread, so that we make sure one thread deleting anothers added docs works:
            final List<String> toDeleteIDs = new ArrayList();
            final List<SubDocs> toDeleteSubDocs = new ArrayList();
            while(System.currentTimeMillis() < stopTime && !failed.get()) {
              try {
                Document doc = docs.nextDoc();
                if (doc == null) {
                  break;
                }
                final String addedField;
                if (random.nextBoolean()) {
                  addedField = "extra" + random.nextInt(10);
                  doc.add(new Field(addedField, "a random field", Field.Store.NO, Field.Index.ANALYZED));
                } else {
                  addedField = null;
                }
                if (random.nextBoolean()) {
                  if (VERBOSE) {
                    System.out.println(Thread.currentThread().getName() + ": add doc id:" + doc.get("docid"));
                  }

                  if (random.nextBoolean()) {
                    // Add a pack of adjacent sub-docs
                    final String packID;
                    final SubDocs delSubDocs;
                    if (toDeleteSubDocs.size() > 0 && random.nextBoolean()) {
                      delSubDocs = toDeleteSubDocs.get(random.nextInt(toDeleteSubDocs.size()));
                      assert !delSubDocs.deleted;
                      toDeleteSubDocs.remove(delSubDocs);
                      // reuse prior packID
                      packID = delSubDocs.packID;
                    } else {
                      delSubDocs = null;
                      // make new packID
                      packID = packCount.getAndIncrement() + "";
                    }

                    final Field packIDField = newField("packID", packID, Field.Store.YES, Field.Index.NOT_ANALYZED);
                    final List<String> docIDs = new ArrayList();
                    final SubDocs subDocs = new SubDocs(packID, docIDs);
                    final List<Document> docsList = new ArrayList();

                    allSubDocs.add(subDocs);
                    doc.add(packIDField);
                    docsList.add(cloneDoc(doc));
                    docIDs.add(doc.get("docid"));

                    final int maxDocCount = _TestUtil.nextInt(random, 1, 10);
                    while(docsList.size() < maxDocCount) {
                      doc = docs.nextDoc();
                      if (doc == null) {
                        break;
                      }
                      docsList.add(cloneDoc(doc));
                      docIDs.add(doc.get("docid"));
                    }
                    addCount.addAndGet(docsList.size());

                    if (delSubDocs != null) {
                      delSubDocs.deleted = true;
                      delIDs.addAll(delSubDocs.subIDs);
                      delCount.addAndGet(delSubDocs.subIDs.size());
                      if (VERBOSE) {
                        System.out.println("TEST: update pack packID=" + delSubDocs.packID + " count=" + docsList.size() + " docs=" + docIDs);
                      }
                      writer.updateDocuments(new Term("packID", delSubDocs.packID), docsList);
                      /*
                      // non-atomic:
                      writer.deleteDocuments(new Term("packID", delSubDocs.packID));
                      for(Document subDoc : docsList) {
                        writer.addDocument(subDoc);
                      }
                      */
                    } else {
                      if (VERBOSE) {
                        System.out.println("TEST: add pack packID=" + packID + " count=" + docsList.size() + " docs=" + docIDs);
                      }
                      writer.addDocuments(docsList);
                      
                      /*
                      // non-atomic:
                      for(Document subDoc : docsList) {
                        writer.addDocument(subDoc);
                      }
                      */
                    }
                    doc.removeField("packID");

                    if (random.nextInt(5) == 2) {
                      if (VERBOSE) {
                        //System.out.println(Thread.currentThread().getName() + ": buffer del id:" + packID);
                      }
                      toDeleteSubDocs.add(subDocs);
                    }

                  } else {
                    writer.addDocument(doc);
                    addCount.getAndIncrement();

                    if (random.nextInt(5) == 3) {
                      if (VERBOSE) {
                        //System.out.println(Thread.currentThread().getName() + ": buffer del id:" + doc.get("docid"));
                      }
                      toDeleteIDs.add(doc.get("docid"));
                    }
                  }
                } else {
                  // we use update but it never replaces a
                  // prior doc
                  if (VERBOSE) {
                    System.out.println(Thread.currentThread().getName() + ": update doc id:" + doc.get("docid"));
                  }
                  writer.updateDocument(new Term("docid", doc.get("docid")), doc);
                  addCount.getAndIncrement();

                  if (random.nextInt(5) == 3) {
                    if (VERBOSE) {
                      //System.out.println(Thread.currentThread().getName() + ": buffer del id:" + doc.get("docid"));
                    }
                    toDeleteIDs.add(doc.get("docid"));
                  }
                }

                if (random.nextInt(30) == 17) {
                  if (VERBOSE) {
                    System.out.println(Thread.currentThread().getName() + ": apply " + toDeleteIDs.size() + " deletes");
                  }
                  for(String id : toDeleteIDs) {
                    if (VERBOSE) {
                      System.out.println(Thread.currentThread().getName() + ": del term=id:" + id);
                    }
                    writer.deleteDocuments(new Term("docid", id));
                  }
                  final int count = delCount.addAndGet(toDeleteIDs.size());
                  if (VERBOSE) {
                    System.out.println(Thread.currentThread().getName() + ": tot " + count + " deletes");
                  }
                  delIDs.addAll(toDeleteIDs);
                  toDeleteIDs.clear();

                  for(SubDocs subDocs : toDeleteSubDocs) {
                    assert !subDocs.deleted;
                    writer.deleteDocuments(new Term("packID", subDocs.packID));
                    subDocs.deleted = true;
                    if (VERBOSE) {
                      System.out.println("  del subs: " + subDocs.subIDs + " packID=" + subDocs.packID);
                    }
                    delIDs.addAll(subDocs.subIDs);
                    delCount.addAndGet(subDocs.subIDs.size());
                  }
                  toDeleteSubDocs.clear();
                }
                if (addedField != null) {
                  doc.removeField(addedField);
                }
              } catch (Throwable t) {
                System.out.println(Thread.currentThread().getName() + ": hit exc");
                t.printStackTrace();
                failed.set(true);
                throw new RuntimeException(t);
              }
            }
            if (VERBOSE) {
              System.out.println(Thread.currentThread().getName() + ": indexing done");
            }
          }
        };
      threads[thread].setDaemon(true);
      threads[thread].start();
    }

    if (VERBOSE) {
      System.out.println("TEST: DONE start indexing threads [" + (System.currentTimeMillis()-t0) + " ms]");
    }

    // let index build up a bit
    Thread.sleep(100);

    IndexReader r = IndexReader.open(writer, true);
    boolean any = false;

    // silly starting guess:
    final AtomicInteger totTermCount = new AtomicInteger(100);

    final ExecutorService es = Executors.newCachedThreadPool();

    while(System.currentTimeMillis() < stopTime && !failed.get()) {
      if (random.nextBoolean()) {
        if (VERBOSE) {
          System.out.println("TEST: now reopen r=" + r);
        }
        final IndexReader r2 = r.reopen();
        if (r != r2) {
          r.close();
          r = r2;
        }
      } else {
        if (VERBOSE) {
          System.out.println("TEST: now close reader=" + r);
        }
        r.close();
        writer.commit();
        final Set<String> openDeletedFiles = dir.getOpenDeletedFiles();
        if (openDeletedFiles.size() > 0) {
          System.out.println("OBD files: " + openDeletedFiles);
        }
        any |= openDeletedFiles.size() > 0;
        //assertEquals("open but deleted: " + openDeletedFiles, 0, openDeletedFiles.size());
        if (VERBOSE) {
          System.out.println("TEST: now open");
        }
        r = IndexReader.open(writer, true);
      }
      if (VERBOSE) {
        System.out.println("TEST: got new reader=" + r);
      }
      //System.out.println("numDocs=" + r.numDocs() + "
      //openDelFileCount=" + dir.openDeleteFileCount());

      smokeTestReader(r);

      if (r.numDocs() > 0) {

        final IndexSearcher s = new IndexSearcher(r, es);

        // run search threads
        final long searchStopTime = System.currentTimeMillis() + 500;
        final Thread[] searchThreads = new Thread[NUM_SEARCH_THREADS];
        final AtomicInteger totHits = new AtomicInteger();
        for(int thread=0;thread<NUM_SEARCH_THREADS;thread++) {
          searchThreads[thread] = new Thread() {
              @Override
              public void run() {
                try {
                  TermEnum termEnum = s.getIndexReader().terms(new Term("body", ""));
                  int seenTermCount = 0;
                  int shift;
                  int trigger;
                  if (totTermCount.get() < 10) {
                    shift = 0;
                    trigger = 1;
                  } else {
                    trigger = totTermCount.get()/10;
                    shift = random.nextInt(trigger);
                  }
                  while(System.currentTimeMillis() < searchStopTime) {
                    Term term = termEnum.term();
                    if (term == null) {
                      if (seenTermCount < 10) {
                        break;
                      }
                      totTermCount.set(seenTermCount);
                      seenTermCount = 0;
                      trigger = totTermCount.get()/10;
                      //System.out.println("trigger " + trigger);
                      shift = random.nextInt(trigger);
                      termEnum = s.getIndexReader().terms(new Term("body", ""));
                      continue;
                    }
                    seenTermCount++;
                    // search 10 terms
                    if (trigger == 0) {
                      trigger = 1;
                    }
                    if ((seenTermCount + shift) % trigger == 0) {
                      //if (VERBOSE) {
                      //System.out.println(Thread.currentThread().getName() + " now search body:" + term.utf8ToString());
                      //}
                      totHits.addAndGet(runQuery(s, new TermQuery(term)));
                    }
                    termEnum.next();
                  }
                  if (VERBOSE) {
                    System.out.println(Thread.currentThread().getName() + ": search done");
                  }
                } catch (Throwable t) {
                  System.out.println(Thread.currentThread().getName() + ": hit exc");
                  failed.set(true);
                  t.printStackTrace(System.out);
                  throw new RuntimeException(t);
                }
              }
            };
          searchThreads[thread].setDaemon(true);
          searchThreads[thread].start();
        }

        for(int thread=0;thread<NUM_SEARCH_THREADS;thread++) {
          searchThreads[thread].join();
        }

        if (VERBOSE) {
          System.out.println("TEST: DONE search: totHits=" + totHits);
        }
      } else {
        Thread.sleep(100);
      }
    }

    es.shutdown();
    es.awaitTermination(1, TimeUnit.SECONDS);

    if (VERBOSE) {
      System.out.println("TEST: all searching done [" + (System.currentTimeMillis()-t0) + " ms]");
    }

    //System.out.println("numDocs=" + r.numDocs() + " openDelFileCount=" + dir.openDeleteFileCount());
    r.close();
    final Set<String> openDeletedFiles = dir.getOpenDeletedFiles();
    if (openDeletedFiles.size() > 0) {
      System.out.println("OBD files: " + openDeletedFiles);
    }
    any |= openDeletedFiles.size() > 0;

    assertFalse("saw non-zero open-but-deleted count", any);
    if (VERBOSE) {
      System.out.println("TEST: now join");
    }
    for(int thread=0;thread<NUM_INDEX_THREADS;thread++) {
      threads[thread].join();
    }
    if (VERBOSE) {
      System.out.println("TEST: done join [" + (System.currentTimeMillis()-t0) + " ms]; addCount=" + addCount + " delCount=" + delCount);
    }

    final IndexReader r2 = writer.getReader();
    final IndexSearcher s = newSearcher(r2);
    boolean doFail = false;
    for(String id : delIDs) {
      final TopDocs hits = s.search(new TermQuery(new Term("docid", id)), 1);
      if (hits.totalHits != 0) {
        System.out.println("doc id=" + id + " is supposed to be deleted, but got docID=" + hits.scoreDocs[0].doc);
        doFail = true;
      }
    }

    // Make sure each group of sub-docs are still in docID order:
    for(SubDocs subDocs : allSubDocs) {
      if (!subDocs.deleted) {
        // We sort by relevance but the scores should be identical so sort falls back to by docID:
        TopDocs hits = s.search(new TermQuery(new Term("packID", subDocs.packID)), 20);
        assertEquals(subDocs.subIDs.size(), hits.totalHits);
        int lastDocID = -1;
        int startDocID = -1;
        for(ScoreDoc scoreDoc : hits.scoreDocs) {
          final int docID = scoreDoc.doc;
          if (lastDocID != -1) {
            assertEquals(1+lastDocID, docID);
          } else {
            startDocID = docID;
          }
          lastDocID = docID;
          final Document doc = s.doc(docID);
          assertEquals(subDocs.packID, doc.get("packID"));
        }

        lastDocID = startDocID - 1;
        for(String subID : subDocs.subIDs) {
          hits = s.search(new TermQuery(new Term("docid", subID)), 1);
          assertEquals(1, hits.totalHits);
          final int docID = hits.scoreDocs[0].doc;
          if (lastDocID != -1) {
            assertEquals(1+lastDocID, docID);
          }
          lastDocID = docID;
        }          
      } else {
        for(String subID : subDocs.subIDs) {
          assertEquals(0, s.search(new TermQuery(new Term("docid", subID)), 1).totalHits);
        }
      }
    }
    
    final int endID = Integer.parseInt(docs.nextDoc().get("docid"));
    for(int id=0;id<endID;id++) {
      String stringID = ""+id;
      if (!delIDs.contains(stringID)) {
        final TopDocs hits = s.search(new TermQuery(new Term("docid", stringID)), 1);
        if (hits.totalHits != 1) {
          System.out.println("doc id=" + stringID + " is not supposed to be deleted, but got hitCount=" + hits.totalHits);
          doFail = true;
        }
      }
    }
    assertFalse(doFail);
    
    assertEquals("index=" + writer.segString() + " addCount=" + addCount + " delCount=" + delCount, addCount.get() - delCount.get(), r2.numDocs());
    r2.close();

    writer.commit();
    assertEquals("index=" + writer.segString() + " addCount=" + addCount + " delCount=" + delCount, addCount.get() - delCount.get(), writer.numDocs());

    assertFalse(writer.anyNonBulkMerges);
    writer.close(false);
    _TestUtil.checkIndex(dir);
    s.close();
    dir.close();
    _TestUtil.rmDir(tempDir);
    docs.close();
    if (VERBOSE) {
      System.out.println("TEST: done [" + (System.currentTimeMillis()-t0) + " ms]");
    }
  }

  private int runQuery(IndexSearcher s, Query q) throws Exception {
    s.search(q, 10);
    return s.search(q, null, 10, new Sort(new SortField("title", SortField.STRING))).totalHits;
  }

  private void smokeTestReader(IndexReader r) throws Exception {
    IndexSearcher s = newSearcher(r);
    runQuery(s, new TermQuery(new Term("body", "united")));
    runQuery(s, new TermQuery(new Term("titleTokenized", "states")));
    PhraseQuery pq = new PhraseQuery();
    pq.add(new Term("body", "united"));
    pq.add(new Term("body", "states"));
    runQuery(s, pq);
    s.close();
  }
}

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