class LogAggregator {

  private static final int BUFFER_THRESHOLD = 3;
  private final CentralLogStore centralLogStore;
  private final ConcurrentLinkedQueue<LogEntry> buffer = new ConcurrentLinkedQueue<>();
  private final LogLevel minLogLevel;
  private final ExecutorService executorService = Executors.newSingleThreadExecutor();
  private final AtomicInteger logCount = new AtomicInteger(0);

  /**
   * constructor of LogAggregator.
   *
   * @param centralLogStore central log store implement
   * @param minLogLevel min log level to store log
   */
  public LogAggregator(CentralLogStore centralLogStore, LogLevel minLogLevel) {
    this.centralLogStore = centralLogStore;
    this.minLogLevel = minLogLevel;
    startBufferFlusher();
  }

  /**
   * Collects a given log entry, and filters it by the defined log level.
   *
   * @param logEntry The log entry to collect.
   */
  public void collectLog(LogEntry logEntry) {
    if (logEntry.getLevel() == null || minLogLevel == null) {
      LOGGER.warn("Log level or threshold level is null. Skipping.");
      return;
    }

    if (logEntry.getLevel().compareTo(minLogLevel) < 0) {
      LOGGER.debug("Log level below threshold. Skipping.");
      return;
    }

    buffer.offer(logEntry);

    if (logCount.incrementAndGet() >= BUFFER_THRESHOLD) {
      flushBuffer();
    }
  }

  /**
   * Stops the log aggregator service and flushes any remaining logs to
   * the central log store.
   *
   * @throws InterruptedException If any thread has interrupted the current thread.
   */
  public void stop() throws InterruptedException {
    executorService.shutdownNow();
    if (!executorService.awaitTermination(10, TimeUnit.SECONDS)) {
      LOGGER.error("Log aggregator did not terminate.");
    }
    flushBuffer();
  }

  private void flushBuffer() {<FILL_FUNCTION_BODY>}

  private void startBufferFlusher() {
    executorService.execute(() -> {
      while (!Thread.currentThread().isInterrupted()) {
        try {
          Thread.sleep(5000); // Flush every 5 seconds.
          flushBuffer();
        } catch (InterruptedException e) {
          Thread.currentThread().interrupt();
        }
      }
    });
  }
}

    LogEntry logEntry;
    while ((logEntry = buffer.poll()) != null) {
      centralLogStore.storeLog(logEntry);
      logCount.decrementAndGet();
    }
  
<no_super_class>