if (searchers.isEmpty()) {
            searchers.add(searcher);
        } else {
            searchers.set(0, searcher);
        }
    }

    /**
     * Registers a new searcher with the rank fusion processor.
     * Adds the searcher to the searchers list and initializes the executor service
     * if it hasn't been created yet. The executor service is created with a thread pool

                        }
                    });
                }

                startLatch.countDown();
                assertTrue("Concurrent searches timed out", endLatch.await(10, TimeUnit.SECONDS));

                // Verify all searches completed and returned results
                assertEquals(numSearchThreads, allResults.size());
                for (List<Map<String, Object>> results : allResults) {

        }

        final String[] searchers = DocumentUtil.getValue(docMap, Constants.SEARCHER, String[].class);
        if (searchers != null) {
            docMap.put(Constants.SEARCHER, ArrayUtil.add(searchers, getName()));
        } else {
            docMap.put(Constants.SEARCHER, new String[] { getName() });
        }

        return docMap;
    }

    /**
     * Test registering same searcher multiple times.
     */
    @Test
    public void test_registerSameSearcherMultipleTimes() throws Exception {
        try (RankFusionProcessor processor = new RankFusionProcessor()) {
            processor.setSearcher(new TestSearcher(100));
            final TestSearcher searcher = new TestSearcher(50);
            processor.register(searcher);

        }
    }

    /**
     * Test that all searchers failing still returns empty result gracefully.
     */
    @Test
    public void test_allSearchersFail() throws Exception {
        try (RankFusionProcessor processor = new RankFusionProcessor()) {
            processor.setSearcher(new ExceptionThrowingSearcher(new RuntimeException("Main searcher failed")));
            processor.init();

     */
    @Size(max = 10)
    public String appendQueryParameter;

    /**
     * Enable or disable login requirement for search access.
     * When enabled, users must authenticate before performing searches.
     */
    @Size(max = 10)
    public String loginRequired;

    /**
     * Enable or disable result collapsing for similar documents.
     * When enabled, similar search results are grouped together.

        final TestSearcher searcher = new TestSearcher();
        assertEquals("test", searcher.getName());
    }

    /**
     * Test getName() removes "Searcher" suffix.
     */
    @Test
    public void test_getNameRemovesSearcherSuffix() {
        final CustomSearcher searcher = new CustomSearcher();
        assertEquals("custom", searcher.getName());
    }

    /**

        stream(highlightedFields).of(stream);
    }

    /**
     * Gets the fields that can be searched against.
     *
     * @return array of field names that can be searched
     */
    public String[] getSearchFields() {
        return searchFields;
    }

    /**
     * Sets the fields that can be searched against.
     * Also updates the searchFieldSet for O(1) lookup performance.
     *

        });
        return asHtml(path_AdminKeymatch_AdminKeymatchJsp).renderWith(data -> {
            searchPaging(data, form);
        });
    }

    /**
     * Searches key matches based on the form criteria.
     *
     * @param form the search form
     * @return HTML response for the search results
     */
    @Execute
    @Secured({ ROLE, ROLE + VIEW })

    }

    private static final int MAX_QUERY_LENGTH = 1000;

    private static final Pattern DANGEROUS_QUERY_PATTERN = Pattern.compile("\\*:\\*");

    /**
     * Searches documents using a Fess query.
     *
     * @param query the Fess query string
     * @return the list of search result documents
     */
    protected List<Map<String, Object>> searchWithQuery(final String query) {