Examples of java.io.DataOutput.writeLong()

java.io.DataOutput.writeLong()
Writes a long value, which is comprised of eight bytes, to the output stream. The byte values to be written, in the order shown, are:
```
 (byte)(0xff & (v >> 56)) (byte)(0xff & (v >> 48)) (byte)(0xff & (v >> 40)) (byte)(0xff & (v >> 32)) (byte)(0xff & (v >> 24)) (byte)(0xff & (v >> 16)) (byte)(0xff & (v >>  8)) (byte)(0xff & v) 
```
The bytes written by this method may be read by the readLong method of interface DataInput , which will then return a long equal to v. @param v the long value to be written. @throws IOException if an I/O error occurs.

   */
  public String generateResponseCode(long challenge) {
    ByteArrayOutputStream out = new ByteArrayOutputStream();
    DataOutput dout = new DataOutputStream(out);
    try {
      dout.writeLong(challenge);
    } catch (IOException e) {
      // This should never happen with a ByteArrayOutputStream
      throw new RuntimeException("Unexpected IOException");
    }
    byte[] value = out.toByteArray();

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                    if (file.exists() && server.getLogger().isWritten(nextLogId)) {
                        logId++;


                        output.writeByte(RECOVERY_LOG);
                        crc32.reset();
                        output.writeLong(logId);


                        LOG.info("sending recovery file: " + file.getName());
                        final BufferedInputStream fileInput = new BufferedInputStream(new FileInputStream(file));


                        final byte[] buffer = new byte[8092];

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                            output.writeInt(read);
                            output.write(buffer, 0, read);
                        }
                        output.writeInt(0);


                        output.writeLong(crc32.getValue());
                    }
                    try {
                        Thread.sleep(300);
                    } catch (final InterruptedException ignore) {
                    }

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                return;
            }


            final LogRange logFileRange = Util.logFileRange();
            final long lastId = logFileRange.noLogFile() ? -1 : logFileRange.getLast();
            output.writeLong(lastId);
            do {
                if (input.readByte() != RECOVERY_LOG) {
                    return;
                }
                crc32.reset();

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    ByteArrayOutputStream baos = new ByteArrayOutputStream();
    DataOutput baosDos = new DataOutputStream(baos);


    BlockType.TRAILER.write(baosDos);
    baosDos.writeLong(fileInfoOffset);
    baosDos.writeLong(loadOnOpenDataOffset);
    baosDos.writeInt(dataIndexCount);


    if (majorVersion == 1) {
      // This used to be metaIndexOffset, but it was not used in version 1.

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    ByteArrayOutputStream baos = new ByteArrayOutputStream();
    DataOutput baosDos = new DataOutputStream(baos);


    BlockType.TRAILER.write(baosDos);
    baosDos.writeLong(fileInfoOffset);
    baosDos.writeLong(loadOnOpenDataOffset);
    baosDos.writeInt(dataIndexCount);


    if (majorVersion == 1) {
      // This used to be metaIndexOffset, but it was not used in version 1.
      baosDos.writeLong(0);

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    baosDos.writeLong(loadOnOpenDataOffset);
    baosDos.writeInt(dataIndexCount);


    if (majorVersion == 1) {
      // This used to be metaIndexOffset, but it was not used in version 1.
      baosDos.writeLong(0);
    } else {
      baosDos.writeLong(uncompressedDataIndexSize);
    }


    baosDos.writeInt(metaIndexCount);

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    if (majorVersion == 1) {
      // This used to be metaIndexOffset, but it was not used in version 1.
      baosDos.writeLong(0);
    } else {
      baosDos.writeLong(uncompressedDataIndexSize);
    }


    baosDos.writeInt(metaIndexCount);
    baosDos.writeLong(totalUncompressedBytes);
    if (majorVersion == 1) {

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    } else {
      baosDos.writeLong(uncompressedDataIndexSize);
    }


    baosDos.writeInt(metaIndexCount);
    baosDos.writeLong(totalUncompressedBytes);
    if (majorVersion == 1) {
      baosDos.writeInt((int) Math.min(Integer.MAX_VALUE, entryCount));
    } else {
      // This field is long from version 2 onwards.
      baosDos.writeLong(entryCount);

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    baosDos.writeLong(totalUncompressedBytes);
    if (majorVersion == 1) {
      baosDos.writeInt((int) Math.min(Integer.MAX_VALUE, entryCount));
    } else {
      // This field is long from version 2 onwards.
      baosDos.writeLong(entryCount);
    }
    baosDos.writeInt(compressionCodec.ordinal());


    if (majorVersion > 1) {
      baosDos.writeInt(numDataIndexLevels);

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