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Lucene example source code file (TestMultiThreadTermVectors.java)

This example Lucene source code file (TestMultiThreadTermVectors.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

document, exception, exception, indexreader, indexreader, indexwriter, io, ioexception, multithreadtermvectorsreader, multithreadtermvectorsreader, override, stringbuilder, termfreqvector, termfreqvector, thread

The Lucene TestMultiThreadTermVectors.java source code

package org.apache.lucene.search;

/**
 * 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.util.LuceneTestCase;
import org.apache.lucene.analysis.MockAnalyzer;
import org.apache.lucene.document.*;
import org.apache.lucene.index.IndexReader;
import org.apache.lucene.index.IndexWriter;
import org.apache.lucene.index.TermFreqVector;
import org.apache.lucene.store.Directory;
import org.apache.lucene.util.English;

import java.io.IOException;

public class TestMultiThreadTermVectors extends LuceneTestCase {
  private Directory directory;
  public int numDocs = 100;
  public int numThreads = 3;
  
  @Override
  public void setUp() throws Exception {
    super.setUp();
    directory = newDirectory();
    IndexWriter writer = new IndexWriter(directory, newIndexWriterConfig( TEST_VERSION_CURRENT, new MockAnalyzer(random)).setMergePolicy(newLogMergePolicy()));
    //writer.setUseCompoundFile(false);
    //writer.infoStream = System.out;
    for (int i = 0; i < numDocs; i++) {
      Document doc = new Document();
      Fieldable fld = newField("field", English.intToEnglish(i), Field.Store.YES, Field.Index.NOT_ANALYZED, Field.TermVector.YES);
      doc.add(fld);
      writer.addDocument(doc);
    }
    writer.close();
    
  }
  
  @Override
  public void tearDown() throws Exception {
    directory.close();
    super.tearDown();
  }
  
  public void test() throws Exception {
    
    IndexReader reader = null;
    
    try {
      reader = IndexReader.open(directory, true);
      for(int i = 1; i <= numThreads; i++)
        testTermPositionVectors(reader, i);
      
      
    }
    catch (IOException ioe) {
      fail(ioe.getMessage());
    }
    finally {
      if (reader != null) {
        try {
          /** close the opened reader */
          reader.close();
        } catch (IOException ioe) {
          ioe.printStackTrace();
        }
      }
    }
  }
  
  public void testTermPositionVectors(final IndexReader reader, int threadCount) throws Exception {
    MultiThreadTermVectorsReader[] mtr = new MultiThreadTermVectorsReader[threadCount];
    for (int i = 0; i < threadCount; i++) {
      mtr[i] = new MultiThreadTermVectorsReader();
      mtr[i].init(reader);
    }
    
    
    /** run until all threads finished */ 
    int threadsAlive = mtr.length;
    while (threadsAlive > 0) {
        //System.out.println("Threads alive");
        Thread.sleep(10);
        threadsAlive = mtr.length;
        for (int i = 0; i < mtr.length; i++) {
          if (mtr[i].isAlive() == true) {
            break;
          }
          
          threadsAlive--; 
        }
    }
    
    long totalTime = 0L;
    for (int i = 0; i < mtr.length; i++) {
      totalTime += mtr[i].timeElapsed;
      mtr[i] = null;
    }
    
    //System.out.println("threadcount: " + mtr.length + " average term vector time: " + totalTime/mtr.length);
    
  }
  
}

class MultiThreadTermVectorsReader implements Runnable {
  
  private IndexReader reader = null;
  private Thread t = null;
  
  private final int runsToDo = 100;
  long timeElapsed = 0;
  
  
  public void init(IndexReader reader) {
    this.reader = reader;
    timeElapsed = 0;
    t=new Thread(this);
    t.start();
  }
    
  public boolean isAlive() {
    if (t == null) return false;
    
    return t.isAlive();
  }
  
  public void run() {
      try {
        // run the test 100 times
        for (int i = 0; i < runsToDo; i++)
          testTermVectors();
      }
      catch (Exception e) {
        e.printStackTrace();
      }
      return;
  }
  
  private void testTermVectors() throws Exception {
    // check:
    int numDocs = reader.numDocs();
    long start = 0L;
    for (int docId = 0; docId < numDocs; docId++) {
      start = System.currentTimeMillis();
      TermFreqVector [] vectors = reader.getTermFreqVectors(docId);
      timeElapsed += System.currentTimeMillis()-start;
      
      // verify vectors result
      verifyVectors(vectors, docId);
      
      start = System.currentTimeMillis();
      TermFreqVector vector = reader.getTermFreqVector(docId, "field");
      timeElapsed += System.currentTimeMillis()-start;
      
      vectors = new TermFreqVector[1];
      vectors[0] = vector;
      
      verifyVectors(vectors, docId);
      
    }
  }
  
  private void verifyVectors(TermFreqVector[] vectors, int num) {
    StringBuilder temp = new StringBuilder();
    String[] terms = null;
    for (int i = 0; i < vectors.length; i++) {
      terms = vectors[i].getTerms();
      for (int z = 0; z < terms.length; z++) {
        temp.append(terms[z]);
      }
    }
    
    if (!English.intToEnglish(num).trim().equals(temp.toString().trim()))
        System.out.println("wrong term result");
  }
}

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