// Test with no matching headers
        String result = virtualHostHelper.processVirtualHost(s -> "processed_" + s, "default");
        assertEquals("default", result);

        // Test with matching first header
        request.addHeader("Host", "example.com");
        result = virtualHostHelper.processVirtualHost(s -> "processed_" + s, "default");
        assertEquals("processed_site1", result);

        return logger;
    }

    /**
     * Stores parsed data from response into result data.
     * Processes HTML content using XPath expressions and handles robots tags.
     *
     * @param responseData the response data from crawling
     * @param resultData the result data to store processed information
     */
    @Override
    protected void storeData(final ResponseData responseData, final ResultData resultData) {

        assertNotNull(queryBuilder);
        assertTrue(queryBuilder instanceof WildcardQueryBuilder);

        // Query was processed successfully

        // Query was processed successfully
        WildcardQueryBuilder wqb = (WildcardQueryBuilder) queryBuilder;
        assertEquals("title", wqb.fieldName());
    }

    @Test

     * @param crawlingInfoId the crawling session ID
     * @param url the URL to process
     * @return a map containing the processed document data
     * @throws CrawlingAccessException if crawling fails or configuration is invalid
     * @throws ChildUrlsException if the URL redirects to another location
     * @throws CrawlerSystemException if data deserialization fails
     */

        QueryBuilder result = queryCommand.convertPhraseQuery(context, phraseQuery, 1.0f);

        assertNotNull(result);
        assertTrue(result instanceof DefaultQueryBuilder);

        // Verify query was processed
        // Note: Field logging behavior depends on implementation
    }

    @Test
    public void test_convertPhraseQuery_singleTerm_defaultField_dismax() {

        QueryBuilder builder = queryProcessor.execute(context, prefixQuery, 1.0f);

        assertNotNull(builder);
        assertTrue(builder instanceof DefaultQueryBuilder);

        // Query was processed successfully
    }

    @Test
    public void test_convertPrefixQuery_withDefaultField_dismax() throws Exception {
        QueryContext context = new QueryContext("test", false);

        assertEquals("processed: template with params", result);
    }

    // Test evaluate with empty parameters
    @Test
    public void test_evaluate_emptyParams() {
        Map<String, Object> emptyParams = new HashMap<>();
        Object result = testScriptEngine.evaluate("template", emptyParams);
        assertEquals("processed: template with params", result);
    }

* Others...

## Replication - Processes and Memory { #replication-processes-and-memory }

With a FastAPI application, using a server program like the `fastapi` command that runs Uvicorn, running it once in **one process** can serve multiple clients concurrently.

But in many cases, you will want to run several worker processes at the same time.

### Multiple Processes - Workers { #multiple-processes-workers }

* Restarts
* **Replication (the number of processes running)**
* Memory
* Previous steps before starting

Up to this point, with all the tutorials in the docs, you have probably been running a **server program**, for example, using the `fastapi` command, that runs Uvicorn, running a **single process**.

            this.snippet = snippet;
        }

        /**
         * Gets the ViewHelper-processed URL for display.
         *
         * @return the URL link
         */
        public String getUrlLink() {
            return urlLink;
        }

        /**
         * Sets the ViewHelper-processed URL for display.
         *
         * @param urlLink the URL link
         */