Java/w12/datacollect/Main.java

package com.example.datacollect;

import com.example.datacollect.controller.CrawlerController;
import com.example.datacollect.repository.ArticleRepository;
import com.example.datacollect.strategy.StrategyFactory;
import com.example.datacollect.view.ConsoleView;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class Main {
    private static final Logger logger = LoggerFactory.getLogger(Main.class);
    // 统一版本标识，与项目迭代版本对齐
    private static final String CRAWLER_VERSION = "w11";

    public static void main(String[] args) {
        // 1. 启动时打印环境信息，便于问题排查
        logger.info("=== CLI Crawler {} Starting ===", CRAWLER_VERSION);
        logger.info("Java Version: {}", System.getProperty("java.version"));
        logger.info("Project Group: com.example, Artifact: datacollect-cli");

        // 2. 声明核心组件，便于后续关闭/清理
        ConsoleView view = null;
        CrawlerController controller = null;

        try {
            // 初始化核心组件
            view = new ConsoleView();
            ArticleRepository repository = new ArticleRepository();
            StrategyFactory strategyFactory = new StrategyFactory();
            controller = new CrawlerController(view, repository, strategyFactory);

            // 3. 优化欢迎信息，版本号统一
            String welcomeMsg = String.format("Welcome to CLI Crawler (%s)! Type 'help' for available commands.", CRAWLER_VERSION);
            logger.info(welcomeMsg);
            view.printSuccess(welcomeMsg);

            // 4. 添加JVM关闭钩子，实现优雅退出（比如Ctrl+C终止时清理资源）
            Runtime.getRuntime().addShutdownHook(new Thread(() -> {
                logger.info("=== CLI Crawler {} Shutting Down ===", CRAWLER_VERSION);
                if (view != null) {
                    view.printInfo("Crawler exited gracefully.");
                }
                logger.info("Crawler shutdown completed.");
            }));

            // 核心循环：处理用户输入
            while (true) {
                controller.handle(view.readLine());
            }

        } catch (Throwable e) { // 捕获Throwable，覆盖Error和Exception，避免程序意外崩溃
            logger.error("Unexpected fatal error in main loop", e);
            if (view != null) {
                view.printError("System fatal error: " + e.getMessage());
            }
            System.exit(1); // 非0退出码标识异常

        } finally {
            // 5. 资源清理：关闭ConsoleView中的Scanner（避免资源泄漏）
            if (view != null) {
                logger.debug("Closing ConsoleView resources");
                // 需给ConsoleView补充close方法（见下方补充说明）
                view.close();
            }
            logger.info("Main process exited.");
        }
    }
}