Results pagination in Cassandra (CQL)

Question

I am wondering how can I achieve pagination using Cassandra.

Let us say that I have a blog. The blog lists max 10 posts per page. To access next posts a user must cl

Answer 1

Manual Paging

The driver exposes a PagingState object that represents where we were in the result set when the last page was fetched:

ResultSet resultSet = session.execute("your query");
// iterate the result set...
PagingState pagingState = resultSet.getExecutionInfo().getPagingState();

This object can be serialized to a String or a byte array:

String string = pagingState.toString();
byte[] bytes = pagingState.toBytes();

This serialized form can be saved in some form of persistent storage to be reused later. When that value is retrieved later, we can deserialize it and reinject it in a statement:

PagingState pagingState = PagingState.fromString(string);
Statement st = new SimpleStatement("your query");
st.setPagingState(pagingState);
ResultSet rs = session.execute(st);

Note that the paging state can only be reused with the exact same statement (same query string, same parameters). Also, it is an opaque value that is only meant to be collected, stored an re-used. If you try to modify its contents or reuse it with a different statement, the driver will raise an error.

Src: http://datastax.github.io/java-driver/manual/paging/