default List listAllFiles()

in foundation/CDDBaselineJava/src/main/java/com/awslabs/aws/iot/greengrass/cdd/nativeprocesses/interfaces/NativeProcessHelper.java [27:70]

30 lines of code
2 McCabe index (conditional complexity)


    default List<Path> listAllFiles() {
        Logger log = LoggerFactory.getLogger(NativeProcessHelper.class);
        List<Path> output = new ArrayList<>();

        try {
            Instant startInstant = Instant.now();

            // Adapted from - https://stackoverflow.com/questions/44007055/avoid-java-8-files-walk-termination-cause-of-java-nio-file-accessdeniedexc
            Files.walkFileTree(new File("/").toPath(), new HashSet<>(),
                    Integer.MAX_VALUE, new SimpleFileVisitor<Path>() {
                        @Override
                        public FileVisitResult visitFile(Path file, BasicFileAttributes attrs) throws IOException {
                            // File, add to the list
                            output.add(file);

                            return FileVisitResult.CONTINUE;
                        }

                        @Override
                        public FileVisitResult visitFileFailed(Path file, IOException e) throws IOException {
                            // Failed path, ignore it and the subtree (if it is a directory)
                            return FileVisitResult.SKIP_SUBTREE;
                        }

                        @Override
                        public FileVisitResult preVisitDirectory(Path dir, BasicFileAttributes attrs) throws IOException {
                            // Directory, add to the list
                            output.add(dir);

                            return FileVisitResult.CONTINUE;
                        }
                    });

            Instant stopInstant = Instant.now();

            Duration duration = Duration.between(startInstant, stopInstant);

            log.debug("Time to walk filesystem: " + duration);
        } catch (Exception e) {
            log.error(e.getMessage());
        }

        return output;
    }