Beispiel #1
0
  public static void createTestFiles() {
    try {
      System.out.println("Creating test files ... ");
      Random rand = new Random();
      String rootname = "f-";

      long[] sizes = {0, 1, 50000000};

      File testdir = new File(dirname);
      FileUtil.mkdirs(testdir);

      for (int i = 0; i < sizes.length; i++) {
        long size = sizes[i];
        File file = new File(testdir, rootname + String.valueOf(size));
        System.out.println(file.getName() + "...");
        FileChannel fc = new RandomAccessFile(file, "rw").getChannel();

        long position = 0;
        while (position < size) {
          long remaining = size - position;
          if (remaining > 1024000) remaining = 1024000;
          byte[] buffer = new byte[new Long(remaining).intValue()];
          rand.nextBytes(buffer);
          ByteBuffer bb = ByteBuffer.wrap(buffer);
          position += fc.write(bb);
        }

        fc.close();
      }
      System.out.println("DONE\n");
    } catch (Exception e) {
      Debug.printStackTrace(e);
    }
  }
Beispiel #2
0
  public static void main(String[] argv) {
    if (argv.length != 3) {
      usage();
    }

    String tempFile = argv[0];
    String testFile = argv[1];
    int fileSize = Integer.valueOf(argv[2]).intValue();
    int exitcode = 0;
    int numRead;
    int numThisBuf;
    int numWritten;

    if ((fileSize <= 0) || (fileSize % 4096 != 0)) {
      System.out.println("Error: size is not a multiple of 4096!!!!!!");
      System.out.println();
      usage();
    }

    try {
      int bufSize = 4096;
      byte[] inBytes = new byte[bufSize];
      byte[] outBytes = new byte[bufSize];
      Random ioRandom = new Random(2006);
      ioRandom.nextBytes(outBytes);
      ByteBuffer inBuf = ByteBuffer.allocate(bufSize);
      ByteBuffer outBuf = ByteBuffer.wrap(outBytes);

      //
      // Loop forever
      //
      while (true) {
        //
        // Write the temporary file
        //
        FileOutputStream fos = new FileOutputStream(tempFile);
        FileChannel foc = fos.getChannel();
        numWritten = 0;
        while (numWritten < fileSize) {
          outBuf.clear(); // sets limit to capacity & position to zero
          while (outBuf.hasRemaining()) {
            numWritten += foc.write(outBuf);
          }
        }

        //
        // Move to permanent location
        //
        FileChannel srcChannel = new FileInputStream(tempFile).getChannel();
        FileChannel dstChannel = new FileOutputStream(testFile).getChannel();
        dstChannel.transferFrom(srcChannel, 0, srcChannel.size());
        srcChannel.close();
        dstChannel.close();
        boolean success = (new File(tempFile)).delete();
        if (!success) {
          System.out.println("Warning: unable to delete temporary file");
        }

        //
        // Read and compare
        //
        FileInputStream fis = new FileInputStream(testFile);
        FileChannel fic = fis.getChannel();

        for (numRead = 0, numThisBuf = 0; numRead < fileSize; numThisBuf = 0) {
          inBuf.rewind(); // Set the buffer position to 0
          numThisBuf = fic.read(inBuf);
          while (numThisBuf < bufSize) {
            numThisBuf += fic.read(inBuf);
          }
          numRead += bufSize;
          inBuf.rewind(); // Set the buffer position to 0
          inBuf.get(inBytes);
          boolean same = Arrays.equals(inBytes, outBytes);
          if (same = false) {
            System.out.println("Data read does not equal data written at " + numRead + " bytes");
          }
        }
      }

    } catch (FileNotFoundException fnfe) {
      fnfe.printStackTrace(System.err);
      exitcode = 1;
      // break;
    } catch (SecurityException se) {
      se.printStackTrace(System.err);
      exitcode = 1;
      // break;
    } catch (Throwable t) {
      t.printStackTrace(System.err);
      exitcode = 1;
    }

    System.exit(exitcode);
  }