PollingDataStream improvements.
PollingDataStream improvements.

ralphbean/moksha,ralphbean/moksha,mokshaproject/moksha,lmacken/moksha,ralphbean/moksha,pombredanne/moksha,mokshaproject/moksha,pombredanne/moksha,mokshaproject/moksha,pombredanne/moksha,lmacken/moksha,mokshaproject/moksha,pombredanne/moksha,lmacken/moksha