public void start() {
assert (state == START);
numTuplesSent = 0;
startTime = System.currentTimeMillis();
state = RUNNING;
intervalStartTime = startTime;
intervalNumTuplesSent = 0;
lastOutputTs = 0;
sendSchema();
timer = new Timer();
timer.schedule(new FeederTask(), 1, SLEEP_TIME);
}
