@Override
    public InputStream read(final Path file, final TransferStatus status, final ConnectionCallback callback) throws BackgroundException {
        try {
            final RemoteFile handle = session.sftp().open(file.getAbsolute(), EnumSet.of(OpenMode.READ));
            final int maxUnconfirmedReads = this.getMaxUnconfirmedReads(status);
            if(log.isInfoEnabled()) {
                log.info(String.format("Skipping %d bytes", status.getOffset()));
            }
            return handle.new ReadAheadRemoteFileInputStream(maxUnconfirmedReads, status.getOffset(), status.getLength()) {
                private final AtomicBoolean close = new AtomicBoolean();

                @Override
                public void close() throws IOException {
                    if(close.get()) {
                        log.warn(String.format("Skip double close of stream %s", this));
                        return;
                    }
                    try {
                        super.close();
                    }
                    finally {
                        handle.close();
                        close.set(true);
                    }
                }
            };
        }
        catch(IOException e) {
            throw new SFTPExceptionMappingService().map("Download {0} failed", e, file);
        }
    }
@Test(expected = NotfoundException.class)
    public void testReadNotFound() throws Exception {
        final TransferStatus status = new TransferStatus();
        new SFTPReadFeature(session).read(new Path(new SFTPHomeDirectoryService(session).find(), "nosuchname", EnumSet.of(Path.Type.file)), status, new DisabledConnectionCallback());
    }