ongoing.putIfAbsent(new TransferResourceIdentifier(event.getResource()), Boolean.TRUE);
        put(event, false);
    }

    @Override
    public void transferStarted(TransferEvent event) throws TransferCancelledException {
        if (ongoing.get(new TransferResourceIdentifier(event.getResource())) == Boolean.FALSE) {
            throw new TransferCancelledException();
        }

        ongoing.putIfAbsent(new TransferResourceIdentifier(event.getResource()), Boolean.TRUE);
        put(event, false);
    }

    @Override
    public void transferStarted(TransferEvent event) throws TransferCancelledException {
        if (ongoing.get(new TransferResourceIdentifier(event.getResource())) == Boolean.FALSE) {
            throw new TransferCancelledException();
        }

    }

    /**
     * @throws Exception
     */
    public void testGetResource() throws Exception {
        assertNotNull(ResourceUtil.getResource("java/lang/String.class", "class"));
        assertNotNull(ResourceUtil.getResource("org/codelibs"));
        try {
            ResourceUtil.getResource("hoge", "xml");
            fail("2");
        } catch (final ResourceNotFoundRuntimeException e) {
            System.out.println(e);

     */
    @Test
    public void testForEachJarFile() throws Exception {
        final String classFilePath = TestCase.class.getName().replace('.', '/') + ".class";
        final URL classURL = ResourceUtil.getResource(classFilePath);
        final JarURLConnection con = (JarURLConnection) classURL.openConnection();
        ResourceTraversalUtil.forEach(con.getJarFile(), (ResourceHandler) (path, is) -> {
            try {

        println(
                "transferInitiated",
                message + ": " + event.getResource().getRepositoryUrl()
                        + event.getResource().getResourceName());
    }

    @Override
    public void transferProgressed(TransferEvent event) {
        TransferResource resource = event.getResource();
        downloads.put(resource, event.getTransferredBytes());

    }

    @Test
    public void test_addSourceWithNullSources() {
        final ChatMessage message = new ChatMessage();
        message.setSources(null);

        final ChatSource source = new ChatSource();
        source.setTitle("New Source");

        message.addSource(source);

        assertNotNull(message.getSources());
        assertEquals(1, message.getSources().size());

        String direction = event.getRequestType() == TransferEvent.RequestType.PUT ? "to" : "from";

        TransferResource resource = event.getResource();
        StringBuilder message = new StringBuilder();
        message.append(action).append(' ').append(direction).append(' ').append(resource.getRepositoryId());
        message.append(": ");

     *            The resource path. Must not be {@literal null} or empty string.
     * @return The resource {@link URL}
     * @see #getResource(String, String)
     */
    public static URL getResource(final String path) {
        assertArgumentNotEmpty("path", path);

        return getResource(path, null);
    }

    /**
     * Returns the resource from the context class loader.
     *
     * @param path

        String direction = event.getRequestType() == TransferEvent.RequestType.PUT ? "to" : "from";

        TransferResource resource = event.getResource();
        MessageBuilder message = messageBuilderFactory.builder();
        message.style(STYLE).append(action).append(' ').append(direction).append(' ');
        message.resetStyle().append(resource.getRepositoryId());

        transfers.remove(new TransferResourceIdentifier(event.getResource()));
        overridePreviousTransfer(event);

        super.transferSucceeded(event);
    }

    @Override
    public void transferFailed(TransferEvent event) {
        transfers.remove(new TransferResourceIdentifier(event.getResource()));
        overridePreviousTransfer(event);

        super.transferFailed(event);