private int getNumTuples() {
long elapsedTimeMs = System.currentTimeMillis() - intervalStartTime;
int desired = (int) (elapsedTimeMs * rate / 1000 - intervalNumTuplesSent);
// correct rate = rate / 10
int max = (rate / 10 + 1) * 12 / 10;
if (desired > max) return max;
return desired;
}
public void unpause() {
assert (state == PAUSED || state == END);
synchronized (this) {
if (state == END || state == TERMINATED) return;
state = RUNNING;
}
intervalNumTuplesSent = 0;
intervalStartTime = System.currentTimeMillis();
}
public void setRate(int newRate) {
assert (state == START || state == RUNNING || state == END || state == PAUSED);
if (state == END) return;
if (rate != newRate) {
rate = newRate;
if (state == RUNNING) {
intervalStartTime = System.currentTimeMillis();
intervalNumTuplesSent = 0;
}
}
}
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);
}
private int getCurTs() {
return (int) ((System.currentTimeMillis() - startTime) / 1000);
}