For Google App Engine (java), how do I set and use chunk size in FetchOptions?

Question

Im running a query and it is currently returning 1400 results and because of this I am getting the following warning in the log file:

com.google.appengine

Answer 1

If you are using the dataStore directly, without JDO, then you would do something like the following to set the chunk-size when you are iterating through the data:

Query query = new Query("entityname");
PreparedQuery preparedQuery = dataStore.prepare(query);
// the 200 should be less than 1000
FetchOptions options = FetchOptions.Builder.withChunkSize(200);
for (Entity result : preparedQuery.asIterable(options)) {
    ...
}