}

  /** Returns the URLs in the class path. */
  static URL[] getClassPathUrls() {
    return ClassPathUtil.class.getClassLoader() instanceof URLClassLoader
        ? ((URLClassLoader) ClassPathUtil.class.getClassLoader()).getURLs()
        : parseJavaClassPath();
  }

                assertTrue(urlQueue.getUrl() + "=>" + url1, urlQueue.getUrl().startsWith(url1));
            }
            while ((urlQueue = urlQueueService.poll(sessionId2)) != null) {
                assertTrue(urlQueue.getUrl() + "=>" + url2, urlQueue.getUrl().startsWith(url2));
            }

            dataService.iterate(sessionId1, accessResult -> assertTrue(accessResult.getUrl().startsWith(url1)));

            if (arMap.containsKey(accessResult.getUrl())) {
                throw new CrawlerSystemException(accessResult.getUrl() + " already exists.");
            }
            arMap.put(accessResult.getUrl(), accessResult);
        }

    }

    /**
     * Gets the count of access results for the specified session.
     *

     * {@link RemoteRepository#getUrl()} root.
     *
     * @throws RuntimeException If PUT fails for any reason.
     */
    void put(@Nonnull Path source, @Nonnull URI relativeTarget);

    /**
     * PUTs the source byte array to target URI. The target MUST BE relative from the
     * {@link RemoteRepository#getUrl()} root.
     *
     * @throws RuntimeException If PUT fails for any reason.

        // Test that multiple calls to getUrl() return the same value
        String url = "http://example.com/test";
        String message = "Test message";
        Exception cause = new RuntimeException("Test cause");

        DataStoreCrawlingException exception = new DataStoreCrawlingException(url, message, cause);

        // Call getUrl() multiple times
        assertEquals(url, exception.getUrl());

        final ClRuntimeException ex = new ClRuntimeException("ECL0001", asArray("hoge"));
        assertThat(ex.getMessageCode(), is("ECL0001"));
        assertThat(ex.getArgs().length, is(1));
        assertThat(ex.getArgs()[0], is((Object) "hoge"));
        System.out.println(ex.getMessage());
    }

    /**
     * @throws Exception
     */
    @Test
    public void testGetCause() throws Exception {

     */
    @Override
    public ResponseData execute(final RequestData request) {
        return switch (request.getMethod()) {
        case GET -> doGet(request.getUrl());
        case HEAD -> doHead(request.getUrl());
        case POST -> doPost(request.getUrl());
        default -> throw new CrawlerSystemException(request.getMethod() + " method is not supported.");
        };
    }

    /**

        // load the child project, which inherits from p0...
        MavenProject project0 = getProject(pom0);
        MavenProject project1 = getProject(pom1);

        assertEquals(project1.getScm().getUrl(), project0.getScm().getUrl() + "/modules/p1");
        assertEquals(project1.getScm().getConnection(), project0.getScm().getConnection() + "/modules/p1");
        assertEquals(

        final String url = urlQueue.getUrl();
        if (StringUtil.isBlank(url)) {
            if (logger.isDebugEnabled()) {
                logger.debug("URL is a blank: {}", url);
            }
            return false;
        }

        // check it in queue
        for (final UrlQueue<Long> urlInQueue : urlQueueList) {
            if (url.equals(urlInQueue.getUrl())) {

    }

    @Override
    public String getKey() {
        return userLocalArtifactRepository.getKey();
    }

    @Override
    public String getUrl() {
        return userLocalArtifactRepository.getUrl();
    }

    @Override
    public int hashCode() {
        int hash = 17;
        hash = hash * 31 + (buildReactor == null ? 0 : buildReactor.hashCode());