You won't have to store the list, just get the count of the keys to start
with.
public long queryTotal() {
long total = 0;
PersistenceManager pm = sp.getPersistenceManager();
try {
Query q = pm.newQuery("select stuffIdKey from " +
ThingStuffJdo.class.getName());
List<Key> ids = (List<Key>) q.execute();
total = ids.size();
q.closeAll();
} catch (Exception e) {
e.printStackTrace();
log.log(Level.SEVERE, "", e);
} finally {
pm.close();
}
return total;
}
Once you get the total count, they you can page through your regular query
using a range or
like in http://code.google.com/appengine/docs/java/datastore/queries.html
fetching results section.
Brandon Donnelson
http://gwt-examples.googlecode.com
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