Package org.apache.hadoop.hbase.io.hfile.HFile

Examples of org.apache.hadoop.hbase.io.hfile.HFile.Writer

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    StoreFile f = this.store.getStorefiles().firstEntry().getValue();
    Path storedir = f.getPath().getParent();
    long seqid = f.getMaxSequenceId();
    HBaseConfiguration c = new HBaseConfiguration();
    FileSystem fs = FileSystem.get(c);
    Writer w = StoreFile.getWriter(fs, storedir);
    StoreFile.appendMetadata(w, seqid + 1);
    w.close();
    this.store.close();
    // Reopen it... should pick up two files
    this.store = new Store(storedir.getParent().getParent(),
      this.store.getHRegion(),
      this.store.getFamily(), fs, null, c, null);
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  private void createTFile() throws IOException {
    long totalBytes = 0;
    FSDataOutputStream fout = createFSOutput(path, fs);
    try {
      Writer writer =
          new Writer(fout, options.minBlockSize, options.compress, null);
      try {
        BytesWritable key = new BytesWritable();
        BytesWritable val = new BytesWritable();
        timer.start();
        for (long i = 0; true; ++i) {
          if (i % 1000 == 0) { // test the size for every 1000 rows.
            if (fs.getFileStatus(path).getLen() >= options.fileSize) {
              break;
            }
          }
          kvGen.next(key, val, false);
          byte [] k = new byte [key.getLength()];
          System.arraycopy(key.getBytes(), 0, k, 0, key.getLength());
          byte [] v = new byte [val.getLength()];
          System.arraycopy(val.getBytes(), 0, v, 0, key.getLength());
          writer.append(k, v);
          totalBytes += key.getLength();
          totalBytes += val.getLength();
        }
        timer.stop();
      }
      finally {
        writer.close();
      }
    }
    finally {
      fout.close();
    }
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   * Test all features work reasonably when hfile is empty of entries.
   * @throws IOException
   */
  public void testEmptyHFile() throws IOException {
    Path f = new Path(ROOT_DIR, getName());
    Writer w = new Writer(this.fs, f);
    w.close();
    Reader r = new Reader(fs, f, null, false);
    r.loadFileInfo();
    assertNull(r.getFirstKey());
    assertNull(r.getLastKey());
  }
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   * test none codecs
   */
  void basicWithSomeCodec(String codec) throws IOException {
    Path ncTFile = new Path(ROOT_DIR, "basic.hfile");
    FSDataOutputStream fout = createFSOutput(ncTFile);
    Writer writer = new Writer(fout, minBlockSize,
      Compression.getCompressionAlgorithmByName(codec), null);
    LOG.info(writer);
    writeRecords(writer);
    fout.close();
    FSDataInputStream fin = fs.open(ncTFile);
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  }

  private void metablocks(final String compress) throws Exception {
    Path mFile = new Path(ROOT_DIR, "meta.hfile");
    FSDataOutputStream fout = createFSOutput(mFile);
    Writer writer = new Writer(fout, minBlockSize,
      Compression.getCompressionAlgorithmByName(compress), null);
    someTestingWithMetaBlock(writer);
    writer.close();
    fout.close();
    FSDataInputStream fin = fs.open(mFile);
    Reader reader = new Reader(fs.open(mFile), this.fs.getFileStatus(mFile)
        .getLen(), null, false);
    reader.loadFileInfo();
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  }
 
  public void testNullMetaBlocks() throws Exception {
    Path mFile = new Path(ROOT_DIR, "nometa.hfile");
    FSDataOutputStream fout = createFSOutput(mFile);
    Writer writer = new Writer(fout, minBlockSize,
        Compression.Algorithm.NONE, null);
    writer.append("foo".getBytes(), "value".getBytes());
    writer.close();
    fout.close();
    Reader reader = new Reader(fs, mFile, null, false);
    reader.loadFileInfo();
    assertNull(reader.getMetaBlock("non-existant"));
  }
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  public void testComparator() throws IOException {
    Path mFile = new Path(ROOT_DIR, "meta.tfile");
    FSDataOutputStream fout = createFSOutput(mFile);
    Writer writer = new Writer(fout, minBlockSize, (Compression.Algorithm) null,
      new RawComparator<byte []>() {
        @Override
        public int compare(byte[] b1, int s1, int l1, byte[] b2, int s2,
            int l2) {
          return -Bytes.compareTo(b1, s1, l1, b2, s2, l2);
         
        }
        @Override
        public int compare(byte[] o1, byte[] o2) {
          return compare(o1, 0, o1.length, o2, 0, o2.length);
        }
      });
    writer.append("3".getBytes(), "0".getBytes());
    writer.append("2".getBytes(), "0".getBytes());
    writer.append("1".getBytes(), "0".getBytes());
    writer.close();
  }
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    try {
      HFileContext context = new HFileContextBuilder()
                            .withBlockSize(options.minBlockSize)
                            .withCompression(AbstractHFileWriter.compressionByName(options.compress))
                            .build();
      Writer writer = HFile.getWriterFactoryNoCache(conf)
          .withOutputStream(fout)
          .withFileContext(context)
          .withComparator(new KeyValue.RawBytesComparator())
          .create();
      try {
        BytesWritable key = new BytesWritable();
        BytesWritable val = new BytesWritable();
        timer.start();
        for (long i = 0; true; ++i) {
          if (i % 1000 == 0) { // test the size for every 1000 rows.
            if (fs.getFileStatus(path).getLen() >= options.fileSize) {
              break;
            }
          }
          kvGen.next(key, val, false);
          byte [] k = new byte [key.getLength()];
          System.arraycopy(key.getBytes(), 0, k, 0, key.getLength());
          byte [] v = new byte [val.getLength()];
          System.arraycopy(val.getBytes(), 0, v, 0, key.getLength());
          writer.append(k, v);
          totalBytes += key.getLength();
          totalBytes += val.getLength();
        }
        timer.stop();
      }
      finally {
        writer.close();
      }
    }
    finally {
      fout.close();
    }
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   */
  public void testEmptyHFile() throws IOException {
    if (cacheConf == null) cacheConf = new CacheConfig(conf);
    Path f = new Path(ROOT_DIR, getName());
    HFileContext context = new HFileContextBuilder().withIncludesTags(false).build();
    Writer w =
        HFile.getWriterFactory(conf, cacheConf).withPath(fs, f).withFileContext(context).create();
    w.close();
    Reader r = HFile.createReader(fs, f, cacheConf, conf);
    r.loadFileInfo();
    assertNull(r.getFirstKey());
    assertNull(r.getLastKey());
  }
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   */
  public void testCorruptTruncatedHFile() throws IOException {
    if (cacheConf == null) cacheConf = new CacheConfig(conf);
    Path f = new Path(ROOT_DIR, getName());
    HFileContext  context = new HFileContextBuilder().build();
    Writer w = HFile.getWriterFactory(conf, cacheConf).withPath(this.fs, f)
        .withFileContext(context).create();
    writeSomeRecords(w, 0, 100, false);
    w.close();

    Path trunc = new Path(f.getParent(), "trucated");
    truncateFile(fs, w.getPath(), trunc);

    try {
      Reader r = HFile.createReader(fs, trunc, cacheConf, conf);
    } catch (CorruptHFileException che) {
      // Expected failure
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Related Classes of org.apache.hadoop.hbase.io.hfile.HFile.Writer

  • org.apache.hadoop.hbase.io.hfile.TestHFile
  • org.apache.hadoop.hbase.io.hfile.TestHFileSeek
  • org.apache.hadoop.hbase.regionserver.TestStore
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