current = startPort + new Random().nextInt(endPort - startPort);
    }

    public List<Integer> getAllocated() {
        return allocated;
    }

    public final Integer getOrAllocate(String id) {
        return allocatedPortsId.computeIfAbsent(id, (key) -> allocate());
    }

    public final Integer getAllocated(String id) {
        return allocatedPortsId.get(id);
    }