[Cassandra] Cursor paging

private static final String DEFAULT_CURSOR_MARK = "-1";
private static final int PAGE_SIZE = 1;

private TempData getData() {
	return getData(DEFAULT_CURSOR_MARK);
}

private TempData getData(String cursorMark) {
	CassandraPageRequest firstRequest = CassandraPageRequest.first(PAGE_SIZE); //첫번째 페이지가 아닐 경우 오류가 발생함.

	PagingState pagingState = null;
	if (!DEFAULT_CURSOR_MARK.equalsIgnoreCase(cursorMark)) {
		pagingState = PagingState.fromString(cursorMark);
	}

	CassandraPageRequest pageRequest = CassandraPageRequest.of(firstRequest, pagingState);

	Slice<TestEntity> entitySlice = testRepository.findAll(pageRequest);

	String previousCursorMark = DEFAULT_CURSOR_MARK;
	if (!entitySlice.isFirst()) {
		CassandraPageRequest p = (CassandraPageRequest) entitySlice.previousPageable();
		if (p.isPaged() && p.getPagingState() != null) {
			previousCursorMark = p.getPagingState().toString();
		}
	}

	String nextCursorMark = DEFAULT_CURSOR_MARK;
	if (!entitySlice.isLast()) {
		CassandraPageRequest p = (CassandraPageRequest) entitySlice.nextPageable();
		if (p.isPaged() && p.getPagingState() != null) {
			nextCursorMark = p.getPagingState().toString();
		}
	}

	return TempData.builder()
		.previousCursorMark(previousCursorMark)
		.entityList(entitySlice.getContent())
		.nextCursorMark(nextCursorMark)
		.build();
}