@Override
public void run() {
if (tasks.isEmpty()) return;
int shopsProcessed = 0;
while (shopsProcessed < shopsPerTick) {
SearchTask task = tasks.pollLast();
if (task == null) break;
shopsProcessed += task.run(shopsPerTick - shopsProcessed);
if (task.isFinished()) {
task.onComplete();
} else {
tasks.push(task);
}
}
}
