TestScriptEngine engine1 = new TestScriptEngine("v1");
        TestScriptEngine engine2 = new TestScriptEngine("v2");
        TestScriptEngine engine3 = new TestScriptEngine("v3");

        scriptEngineFactory.add("engine", engine1);
        scriptEngineFactory.add("engine", engine2);
        scriptEngineFactory.add("engine", engine3);

        // Should get the last one

        // Execute with second engine
        Object result2 = scriptExecutor.execute("type2", "script for engine2");
        assertEquals("engine2:processed: script for engine2", result2);

        // Verify correct engine was called each time
        assertEquals("script for engine1", engine1.getLastScript());
        assertEquals("script for engine2", engine2.getLastScript());
    }

    @Test

import org.opensearch.index.query.QueryBuilder;
import org.opensearch.index.query.QueryBuilders;

/**
 * Helper class for indexing operations in the Fess search engine.
 * This class provides functionality for sending documents to the search engine,
 * managing document lifecycle operations (create, update, delete), and handling
 * thumbnail processing during indexing.
 *

        final GroovyEngine engine = new GroovyEngine();
        engine.scriptCacheSize = 5;
        engine.init();

        final Map<String, Object> params = new HashMap<>();
        for (int i = 0; i < 10; i++) {
            assertEquals(i, engine.evaluate("return " + i, params));
        }
        // eviction後も再コンパイルで正しく動作
        assertEquals(0, engine.evaluate("return 0", params));
        engine.close();

import jakarta.servlet.ServletOutputStream;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;

/**
 * API manager for search engine administrative operations.
 * Provides secure access to search engine APIs through authentication and token-based authorization.
 */
public class SearchEngineApiManager extends BaseApiManager {
    private static final String ADMIN_SERVER = "/admin/server_";

### Create an Engine { #create-an-engine }

A SQLModel `engine` (underneath it's actually a SQLAlchemy `engine`) is what **holds the connections** to the database.

You would have **one single `engine` object** for all your code to connect to the same database.

    // Search Engine Type Constants
    // ============================================================

    /** Cloud-based search engine type. */
    public static final String FESEN_TYPE_CLOUD = "cloud";

    /** AWS-based search engine type. */
    public static final String FESEN_TYPE_AWS = "aws";

    /** Search engine username configuration key. */

     * The template is evaluated using the specified script engine with the value and context.
     *
     * @param dataMap the data map to modify
     * @param key the key to store the processed value under
     * @param value the original value to process
     * @param template the template script to evaluate
     * @param scriptType the type of script engine to use
     */

    public void close() {
        scriptCache.invalidateAll();
        scriptCache.cleanUp();
    }

    /**
     * Returns the name identifier for this script engine.
     *
     * @return "groovy" - the identifier used to register and retrieve this engine
     */
    @Override
    protected String getName() {
        return "groovy";
    }

    /**

    SQLModel 会知道声明为 `str` 的内容将是类型为 `TEXT`（或 `VARCHAR`，具体取决于数据库）的 SQL 列。

### 创建引擎（Engine） { #create-an-engine }

SQLModel 的 `engine`（实际上它是一个 SQLAlchemy 的 `engine`）是用来与数据库**保持连接**的。

你只需构建**一个 `engine` 对象**，让你的所有代码连接到同一个数据库。

{* ../../docs_src/sql_databases/tutorial001_an_py310.py ln[14:18] hl[14:15,17:18] *}