Examples of org.apache.hadoop.util.LineReader.readLine()

org.apache.hadoop.util.LineReader.readLine()
Read one line from the InputStream into the given Text. @param str the object to store the given line (without newline) @param maxLineLength the maximum number of bytes to store into str;the rest of the line is silently discarded. @param maxBytesToConsume the maximum number of bytes to consumein this call. This is only a hint, because if the line cross this threshold, we allow it to happen. It can overshoot potentially by as much as one buffer length. @return the number of bytes read including the (longest) newlinefound. @throws IOException if the underlying stream throws

  // of archives
  public int getHarVersion() throws IOException {
    FSDataInputStream masterIn = fs.open(masterIndex);
    LineReader lmaster = new LineReader(masterIn, getConf());
    Text line = new Text();
    lmaster.readLine(line);
    try {
      masterIn.close();
    } catch(IOException e){
      //disregard it.
      // its a read.

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      }
      Path harPath = new Path(parentString);
      int harlen = harPath.depth();
      Text line = new Text();
      while (read < archiveIndexStat.getLen()) {
        int tmp = aLin.readLine(line);
        read += tmp;
        String lineFeed = line.toString();
        String child = decodeFileName(lineFeed.substring(0, lineFeed.indexOf(" ")));
        if ((child.startsWith(parentString))) {
          Path thisPath = new Path(child);

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    // in the index file
    FSDataInputStream in = fs.open(masterIndex);
    FileStatus masterStat = fs.getFileStatus(masterIndex);
    LineReader lin = new LineReader(in, getConf());
    Text line = new Text();
    long read = lin.readLine(line);
   //ignore the first line. this is the header of the index files
    String[] readStr = null;
    List<Store> stores = new ArrayList<Store>();
    while(read < masterStat.getLen()) {
      int b = lin.readLine(line);

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    long read = lin.readLine(line);
   //ignore the first line. this is the header of the index files
    String[] readStr = null;
    List<Store> stores = new ArrayList<Store>();
    while(read < masterStat.getLen()) {
      int b = lin.readLine(line);
      read += b;
      readStr = line.toString().split(" ");
      int startHash = Integer.parseInt(readStr[0]);
      int endHash  = Integer.parseInt(readStr[1]);
      if (startHash <= hashCode && hashCode <= endHash) {

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    for (Store s: stores) {
      read = 0;
      aIn.seek(s.begin);
      aLin = new LineReader(aIn, getConf());
      while (read + s.begin < s.end) {
        int tmp = aLin.readLine(line);
        read += tmp;
        String lineFeed = line.toString();
        String[] parsed = lineFeed.split(" ");
        parsed[0] = decodeFileName(parsed[0]);
        if (harPath.compareTo(new Path(parsed[0])) == 0) {

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        FileSystem fs = path.getFileSystem(job.getConfiguration());
        LineReader reader = new LineReader(fs.open(path));
        long pos = 0;
        int n;
        try {
          while ((n = reader.readLine(key)) > 0) {
            String[] hosts = getStoreDirHosts(fs, path);
            splits.add(new FileSplit(path, pos, n, hosts));
            pos += n;
          }
        } finally {

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        FSDataInputStream fileIn = fs.open(path);
        LineReader in = new LineReader(fileIn, job.getConfiguration());
        int lineLen = 0;
        while(true) {
          Text lineText = new Text();
          lineLen = in.readLine(lineText);
          if(lineLen <= 0) {
          break;
          }
          Matcher m = LINE_PATTERN.matcher(lineText.toString());
          if((m != null) && m.matches()) {

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        FSDataInputStream fileIn = fs.open(path);
        LineReader in = new LineReader(fileIn, job.getConfiguration());
        int lineLen = 0;
        while(true) {
          Text lineText = new Text();
          lineLen = in.readLine(lineText);
          if(lineLen <= 0) {
          break;
          }
          Matcher m = LINE_PATTERN.matcher(lineText.toString());
          if((m != null) && m.matches()) {

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    CompressionInputStream cin2 = gzip.createInputStream(in2);
    LineReader in = new LineReader(cin2);
    Text out = new Text();


    int numBytes, totalBytes=0, lineNum=0;
    while ((numBytes = in.readLine(out)) > 0) {
      ++lineNum;
      totalBytes += numBytes;
    }
    in.close();
    assertEquals("total uncompressed bytes in concatenated test file",

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  public static void main(String[] args) throws Exception {
    for(String arg: args) {
      System.out.println("Working on " + arg);
      LineReader reader = makeStream(unquote(arg));
      Text line = new Text();
      int size = reader.readLine(line);
      while (size > 0) {
        System.out.println("Got: " + line.toString());
        size = reader.readLine(line);
      }
      reader.close();

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