import java.time.LocalDateTime;
import java.time.temporal.ChronoUnit;
import java.util.Objects;

public class FloodProtectedMethod
{
    private LocalDateTime shallExecutedAfter = null;
    private ChronoUnit chronoUnit;
    private long delay;

    public FloodProtectedMethod(ChronoUnit chronoUnit, long delay) {
        this.chronoUnit = chronoUnit;
        this.delay = delay;
    }

    public boolean inject(Runnable runnable) {
        LocalDateTime now = LocalDateTime.now();
        synchronized(this) {
            if (Objects.isNull(shallExecutedAfter) || shallExecutedAfter.isBefore(now)) {
                shallExecutedAfter = now.plus(delay, chronoUnit);
                runnable.run();
                return true;
            }
        }
        return false;
    }
}