Examples with PagingStateException com.datastax.driver.core.exceptions.PagingStateException used on opensource projects

Example 1 with PagingStateException

use of com.datastax.driver.core.exceptions.PagingStateException in project incubator-hugegraph by apache.

the class CassandraTable method setPageState.

protected void setPageState(Query query, List<Select> selects) {
    if (query.noLimit() && !query.paging()) {
        return;
    }
    for (Select select : selects) {
        int total = (int) query.total();
        if (!query.noLimit()) {
            E.checkArgument(total == query.total(), "Invalid query limit %s", query.limit());
        } else {
            assert total == -1 : total;
        }
        String page = query.page();
        if (page == null) {
            // Set limit
            assert total > 0 : total;
            select.limit(total);
        } else {
            /*
                 * NOTE: the `total` may be -1 when query.noLimit(),
                 * setFetchSize(-1) means the default fetch size will be used.
                 */
            assert total > 0 || total == -1 : total;
            select.setFetchSize(total);
            // It's the first time if page is empty, skip setPagingState
            if (!page.isEmpty()) {
                byte[] position = PageState.fromString(page).position();
                try {
                    select.setPagingState(PagingState.fromBytes(position));
                } catch (PagingStateException e) {
                    throw new BackendException(e);
                }
            }
        }
    }
}