private var port = 0
  private val executor = Executors.newSingleThreadExecutor(threadFactory("MockHttp2Peer"))
  private var serverSocket: ServerSocket? = null
  private var socket: Socket? = null

  fun setClient(client: Boolean) {
    if (this.client == client) return
    this.client = client
    writer = Http2Writer(bytesOut, client)
  }

  fun acceptFrame() {
    frameCount++
  }

   * that we have to flush headers immediately before any request body can be sent.
   * https://github.com/square/okhttp/issues/2543
   */
  @Test fun peerSetsZeroFlowControl() {
    peer.setClient(true)

    // Write the mocking script.
    peer.sendFrame().settings(Settings().set(Settings.INITIAL_WINDOW_SIZE, 0))
    peer.acceptFrame() // ACK

                response = getClient().get(c -> c.prepareSearchScroll(sid).setScroll(new TimeValue(scrollTimeout)).execute());
                if (!scrollId.equals(response.getScrollId())) {
                    getClient().clearScroll(scrollId);
                }
                scrollId = response.getScrollId();
            }
        } finally {
            getClient().clearScroll(scrollId);
        }
    }

                response = getClient().get(c -> c.prepareSearchScroll(sid).setScroll(new TimeValue(scrollTimeout)).execute());
                if (!scrollId.equals(response.getScrollId())) {
                    getClient().clearScroll(scrollId);
                }
                scrollId = response.getScrollId();
            }
        } finally {
            getClient().clearScroll(scrollId);
        }

        client = clientFactory.getClient(url);
        assertNotNull(client);
        assertTrue(client instanceof FileSystemClient);

        url = "smb:/home/hoge";
        client = clientFactory.getClient(url);
        assertNotNull(client);
        assertTrue(client instanceof SmbClient);

        url = "smb1:/home/hoge";
        client = clientFactory.getClient(url);
        assertNotNull(client);

     * @param url The URL to match.
     * @return The matching CrawlerClient instance.
     */
    @Override
    public CrawlerClient getClient(final String url) {
        return factory.getClient(url);
    }

    /**
     * Sets the client map for the wrapped factory.
     * @param clientMap The map of clients.
     */
    @Override

                response = getClient().get(c -> c.prepareSearchScroll(sid).setScroll(new TimeValue(scrollTimeout)).execute());
                if (!scrollId.equals(response.getScrollId())) {
                    getClient().clearScroll(scrollId);
                }
                scrollId = response.getScrollId();
            }
        } finally {
            getClient().clearScroll(scrollId);
        }
    }

     * Retrieves a client that matches the given URL key.
     * @param urlKey The URL key to match.
     * @return The matching CrawlerClient instance, or null if no match is found.
     */
    public CrawlerClient getClient(final String urlKey) {
        if (StringUtil.isBlank(urlKey)) {
            return null;
        }

        for (final Map.Entry<Pattern, CrawlerClient> entry : clientMap.entrySet()) {

    /**
     * Gets the appropriate crawler client for the given URL.
     * @param url The URL to get a client for.
     * @return The crawler client.
     */
    protected CrawlerClient getClient(final String url) {
        return clientFactory.getClient(url);
    }

    /**
     * Checks if the content has been updated since the last crawl.
     * @param client The crawler client.
     * @param urlQueue The URL queue entry.

            }
            return null;
        })
                .filter(StringUtil::isNotBlank)
                .findFirst()//
                .map(s -> clientFactory.getClient(s + ":" + url))//
                .orElseGet(() -> clientFactory.getClient(url));
        if (logger.isDebugEnabled()) {
            logger.debug("CrawlerClient: {}", client.getClass().getCanonicalName());
        }
        return client;
    }