t.printStackTrace(pw);
            pw.flush();
            return systemHelper.abbreviateLongText(sw.toString());
        } catch (final IOException e) {
            logger.warn("Failed to print the stack trace {}", t.getMessage(), e);
        }
        return StringUtil.EMPTY;
    }

    }

    public void test_print() {
        activityHelper.useEcsFormat = false;
        activityHelper.print("aaa", OptionalThing.empty(), Map.of());
        assertEquals("action:AAA\tuser:-", localLogMsg.get());

        activityHelper.print("aaa bbb", createUser("testuser", new String[0]), Map.of("111", "222"));

    public static final String ERRORS_unauthorized_request = "{errors.unauthorized_request}";

    /** The key of the message: Failed to print thread dump. */
    public static final String ERRORS_failed_to_print_thread_dump = "{errors.failed_to_print_thread_dump}";

    /** The key of the message: {0} is not supported. */
    public static final String ERRORS_file_is_not_supported = "{errors.file_is_not_supported}";

            builder.flush();
            return builder.getOutputStream();
        } catch (final IOException e) {
            if (logger.isDebugEnabled()) {
                logger.debug("Failed to print the output.", e);
            }
            return new ByteArrayOutputStream();
        }
    }

    public static OutputStream getXContentOutputStream(final ToXContent xContent, final MediaType mediaType) {

        response.setContentType(buf.toString());
        writeHeaders(response);
        try (PrintWriter out = new PrintWriter(new OutputStreamWriter(response.getOutputStream(), enc))) {
            out.print(text);
        } catch (final IOException e) {
            throw new IORuntimeException(e);
        }
    }

    protected abstract void writeHeaders(final HttpServletResponse response);

                        .filter(StringUtil::isNotBlank).orElse("-"));
        log(valueMap);
    }

    public void print(final String action, final OptionalThing<FessUserBean> user, final Map<String, String> params) {
        final Map<String, String> valueMap = new LinkedHashMap<>();

 *     System.out.println(indexed.getIndex());
 *     System.out.println(indexed.getElement());
 * }
 * </pre>
 *
 * <pre>
 * import static org.codelibs.core.collection.IndexedIterator.*;
 * import static org.codelibs.core.io.LineIterator.*;
 *
 * BufferedReader reader = ...;
 * for (Indexed&lt;String%gt; indexed : indexed(iterable(reader))) {
 *     System.out.println(indexed.getIndex());

     * Test method for {@link org.codelibs.core.net.UuidUtil#create()}.
     */
    public void testCreate() {
        final String uuid = UuidUtil.create();
        System.out.println(uuid);
        final String uuid2 = UuidUtil.create();
        System.out.println(uuid2);
        assertFalse(uuid.equals(uuid2));
    }

        try {
            ResourceUtil.getResource("hoge", "xml");
            fail("2");
        } catch (final ResourceNotFoundRuntimeException e) {
            System.out.println(e);
            assertEquals("3", "hoge.xml", e.getPath());
        }
        System.out.println(ResourceUtil.getResource("."));
    }

    /**
     * @throws Exception
     */
    public void testGetResourceAsStreamNoException() throws Exception {

            list.getEntry(-1);
            fail();
        } catch (final ClIndexOutOfBoundsException ex) {
            System.out.println(ex);
        }
        try {
            list.getEntry(3);
            fail();
        } catch (final ClIndexOutOfBoundsException ex) {
            System.out.println(ex);
        }
    }

    /**
     * @throws Exception
     */
    @Test