public void run()

in src/main/java/com/uber/rss/tools/FileDescriptorStressTest.java [36:77]
40 lines of code
7 McCabe index (conditional complexity)

  public void run() {
    int filesPerDir = 1000;
    int dirCount = (int)Math.ceil(((double)fileCount)/filesPerDir);
    System.out.println(String.format("Creating %s files with %s directories inside %s", fileCount, dirCount, rootDir));

    List<FileOutputStream> fileStreams = new ArrayList<>();

    try {
      for (int i = 0; i < dirCount; i++) {
        Path dirPath = Paths.get(rootDir, "dir" + i);
        dirPath.toFile().mkdirs();
        dirPath.toFile().deleteOnExit();
        System.out.println(String.format("Creating files under %s, current file descriptors: %s", dirPath.toAbsolutePath(), SystemUtils.getFileDescriptorCount()));
        for (int j = 0; j < filesPerDir; j++) {
          if (fileStreams.size() >= fileCount) {
            break;
          }
          Path filePath = Paths.get(dirPath.toString(), "file" + j);
          filePath.toFile().deleteOnExit();
          try {
            FileOutputStream stream = new FileOutputStream(filePath.toString(), true);
            fileStreams.add(stream);
            if (stream.getChannel().position() == 0) {
              stream.write(0);
              stream.flush();
            }
          } catch (IOException e) {
            e.printStackTrace();
          }
        }
      }
    } finally {
      System.out.println(String.format("Created %s files, current file descriptors: %s", fileStreams.size(), SystemUtils.getFileDescriptorCount()));
      fileStreams.forEach(t-> {
        try {
          t.close();
        } catch (IOException e) {
          e.printStackTrace();
        }
      });
    }
  }