assertEquals(2000, intervalControlHelper.getDelay());

        intervalControlHelper.ruleList.clear();

        intervalControlHelper.addIntervalRule("12:15", "12:15", "*", 3000);
        assertEquals(3000, intervalControlHelper.getDelay());

        intervalControlHelper.ruleList.clear();

        intervalControlHelper.addIntervalRule("12:15", "12:15", "3,5", 4000);

public class ChatForm {

    /**
     * Default constructor.
     */
    public ChatForm() {
        // Default constructor
    }

    /**
     * The user's message/question.
     */
    @Size(max = 4000)
    public String message;

    /**
     * The session ID for conversation continuity.
     */
    @Size(max = 100)
    public String sessionId;

    /**
     * Flag to clear the conversation history.

						<div class="input-wrapper">
							<div class="input-group">
								<textarea id="chatInput" class="form-control"
									placeholder="<la:message key="labels.chat_input_placeholder" />"
									rows="1" maxlength="4000"
									aria-label="<la:message key="labels.chat_input_placeholder" />"></textarea>
								<button type="button" id="sendBtn" class="btn btn-primary" aria-label="<la:message key="labels.chat_send" />">

        try {
            return Integer.parseInt(fessConfig.getOrDefault("rag.chat.message.max.length", "4000"));
        } catch (final NumberFormatException e) {
            logger.warn("Invalid rag.chat.message.max.length config, using default 4000");
            return 4000;
        }
    }

    /**
     * Parses and validates field filter parameters from the request.

                    return "jpg,jpeg,gif,png";

                case FessConfig.JOB_MAX_CRAWLER_PROCESSES:
                    return "3";
                case FessConfig.MAX_LOG_OUTPUT_LENGTH:
                    return "4000";

                // Crawler hotthread properties

                // Index field constants
                case FessConfig.INDEX_FIELD_favorite_count:
                    return "favorite_count";

						<div class="input-wrapper">
							<div class="input-group">
								<textarea id="chatInput" class="form-control"
									placeholder="<la:message key="labels.chat_input_placeholder" />"
									rows="1" maxlength="4000"
									aria-label="<la:message key="labels.chat_input_placeholder" />"></textarea>
								<button type="button" id="sendBtn" class="btn btn-primary" aria-label="<la:message key="labels.chat_send" />">

                if ("rag.chat.message.max.length".equals(key)) {
                    return "8000";
                }
                return defaultValue;
            }
        });

        final int result = chatApiManager.getMaxMessageLength(ComponentUtil.getFessConfig());
        assertEquals(8000, result);
    }

    @Test
    public void test_getMaxMessageLength_invalidValue() {

    public void test_abbreviateLongText() {
        assertEquals("", systemHelper.abbreviateLongText(""));
        assertEquals(4000, systemHelper.abbreviateLongText(Stream.generate(() -> "a").limit(4000).collect(Collectors.joining())).length());
        assertEquals(4000, systemHelper.abbreviateLongText(Stream.generate(() -> "a").limit(4001).collect(Collectors.joining())).length());
    }

    @Test
    public void test_getLanguageItems() {

     * Each LlmClient implementation should override to define defaults appropriate
     * for its target model. The default returns 4000 for backward compatibility.
     *
     * @return the maximum history characters
     */
    protected int getHistoryMaxChars() {
        return 4000;
    }

    /**
     * Gets the maximum number of history messages for intent detection.

            button.removeClass('copied').html(originalHtml);
        }, 2000);
    }

    function showCopyError(button) {
        var originalHtml = button.html();
        button.html('<i class="fa fa-times"></i> ' + config.labels.copyFailed);
        setTimeout(function() {
            button.html(originalHtml);
        }, 2000);
    }

    /**
     * Send a message
     */