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TestIndexFileDeleter.javaAPI DocApache Lucene 2.2.06867Sat Jun 16 22:20:28 BST 2007org.apache.lucene.index

TestIndexFileDeleter

public class TestIndexFileDeleter extends TestCase
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.

Fields Summary
Constructors Summary
Methods Summary
private voidaddDoc(org.apache.lucene.index.IndexWriter writer, int id)

    Document doc = new Document();
    doc.add(new Field("content", "aaa", Field.Store.NO, Field.Index.TOKENIZED));
    doc.add(new Field("id", Integer.toString(id), Field.Store.YES, Field.Index.UN_TOKENIZED));
    writer.addDocument(doc);
private java.lang.StringasString(java.lang.String[] l)

    String s = "";
    for(int i=0;i<l.length;i++) {
      if (i > 0) {
        s += "\n    ";
      }
      s += l[i];
    }
    return s;
public voidcopyFile(org.apache.lucene.store.Directory dir, java.lang.String src, java.lang.String dest)

    IndexInput in = dir.openInput(src);
    IndexOutput out = dir.createOutput(dest);
    byte[] b = new byte[1024];
    long remainder = in.length();
    while(remainder > 0) {
      int len = (int) Math.min(b.length, remainder);
      in.readBytes(b, 0, len);
      out.writeBytes(b, len);
      remainder -= len;
    }
    in.close();
    out.close();
public voidtestDeleteLeftoverFiles()


    Directory dir = new RAMDirectory();

    IndexWriter writer = new IndexWriter(dir, new WhitespaceAnalyzer(), true);
    int i;
    for(i=0;i<35;i++) {
      addDoc(writer, i);
    }
    writer.setUseCompoundFile(false);
    for(;i<45;i++) {
      addDoc(writer, i);
    }
    writer.close();

    // Delete one doc so we get a .del file:
    IndexReader reader = IndexReader.open(dir);
    Term searchTerm = new Term("id", "7");
    int delCount = reader.deleteDocuments(searchTerm);
    assertEquals("didn't delete the right number of documents", 1, delCount);

    // Set one norm so we get a .s0 file:
    reader.setNorm(21, "content", (float) 1.5);
    reader.close();

    // Now, artificially create an extra .del file & extra
    // .s0 file:
    String[] files = dir.list();

    /*
    for(int i=0;i<files.length;i++) {
      System.out.println(i + ": " + files[i]);
    }
    */

    // The numbering of fields can vary depending on which
    // JRE is in use.  On some JREs we see content bound to
    // field 0; on others, field 1.  So, here we have to
    // figure out which field number corresponds to
    // "content", and then set our expected file names below
    // accordingly:
    CompoundFileReader cfsReader = new CompoundFileReader(dir, "_2.cfs");
    FieldInfos fieldInfos = new FieldInfos(cfsReader, "_2.fnm");
    int contentFieldIndex = -1;
    for(i=0;i<fieldInfos.size();i++) {
      FieldInfo fi = fieldInfos.fieldInfo(i);
      if (fi.name.equals("content")) {
        contentFieldIndex = i;
        break;
      }
    }
    cfsReader.close();
    assertTrue("could not locate the 'content' field number in the _2.cfs segment", contentFieldIndex != -1);

    String normSuffix = "s" + contentFieldIndex;

    // Create a bogus separate norms file for a
    // segment/field that actually has a separate norms file
    // already:
    copyFile(dir, "_2_1." + normSuffix, "_2_2." + normSuffix);

    // Create a bogus separate norms file for a
    // segment/field that actually has a separate norms file
    // already, using the "not compound file" extension:
    copyFile(dir, "_2_1." + normSuffix, "_2_2.f" + contentFieldIndex);

    // Create a bogus separate norms file for a
    // segment/field that does not have a separate norms
    // file already:
    copyFile(dir, "_2_1." + normSuffix, "_1_1." + normSuffix);

    // Create a bogus separate norms file for a
    // segment/field that does not have a separate norms
    // file already using the "not compound file" extension:
    copyFile(dir, "_2_1." + normSuffix, "_1_1.f" + contentFieldIndex);

    // Create a bogus separate del file for a
    // segment that already has a separate del file: 
    copyFile(dir, "_0_1.del", "_0_2.del");

    // Create a bogus separate del file for a
    // segment that does not yet have a separate del file:
    copyFile(dir, "_0_1.del", "_1_1.del");

    // Create a bogus separate del file for a
    // non-existent segment:
    copyFile(dir, "_0_1.del", "_188_1.del");

    // Create a bogus segment file:
    copyFile(dir, "_0.cfs", "_188.cfs");

    // Create a bogus fnm file when the CFS already exists:
    copyFile(dir, "_0.cfs", "_0.fnm");

    // Create a deletable file:
    copyFile(dir, "_0.cfs", "deletable");

    // Create some old segments file:
    copyFile(dir, "segments_a", "segments");
    copyFile(dir, "segments_a", "segments_2");

    // Create a bogus cfs file shadowing a non-cfs segment:
    copyFile(dir, "_2.cfs", "_3.cfs");

    String[] filesPre = dir.list();

    // Open & close a writer: it should delete the above 4
    // files and nothing more:
    writer = new IndexWriter(dir, new WhitespaceAnalyzer(), false);
    writer.close();

    String[] files2 = dir.list();
    dir.close();

    Arrays.sort(files);
    Arrays.sort(files2);

    if (!Arrays.equals(files, files2)) {
      fail("IndexFileDeleter failed to delete unreferenced extra files: should have deleted " + (filesPre.length-files.length) + " files but only deleted " + (filesPre.length - files2.length) + "; expected files:\n    " + asString(files) + "\n  actual files:\n    " + asString(files2));
    }