Jetty12+Java21+Wicket环境下Weld无法识别@Inject注入问题

尝试搭建基于Jetty、Apache Wicket和Java 21的小型应用，发现Weld依赖注入无法识别@Inject和@RequestScoped注解，所有标注@Inject的类在运行时始终为null（这些类已添加@Named和@RequestScoped注解）。环境基于wicket.apache.org的默认Wicket Maven快速启动项目修改，已适配Java 21与EE10。

pom.xml依赖版本 #

// [...] pom.xml 其他内容

<properties>
    <wicket.version>10.1.0</wicket.version>
    <slf4j.version>2.0.13</slf4j.version>
    <jetty.version>12.0.7</jetty.version>
    <junit.version>5.10.2</junit.version>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <!-- allowed values: R7, 1.0, 1.5, 2.0 or none -->
    <wtp.version>none</wtp.version>
</properties>
<dependencies>
    <!--  WICKET DEPENDENCIES -->
    <dependency>
        <groupId>org.apache.wicket</groupId>
        <artifactId>wicket-core</artifactId>
        <version>${wicket.version}</version>
    </dependency>
    <dependency>
        <groupId>org.apache.wicket</groupId>
        <artifactId>wicket-native-websocket-javax</artifactId>
        <version>${wicket.version}</version>
    </dependency>
    <dependency>
        <groupId>org.apache.wicket</groupId>
        <artifactId>wicket-cdi</artifactId>
        <version>${wicket.version}</version>
    </dependency>
    <dependency>
        <groupId>jakarta.enterprise</groupId>
        <artifactId>jakarta.enterprise.cdi-api</artifactId>
        <version>4.0.1</version>
    </dependency>
    <dependency>
        <groupId>org.jboss.weld.servlet</groupId>
        <artifactId>weld-servlet-core</artifactId>
        <version>5.1.3.Final</version>
    </dependency>
    <dependency>
        <groupId>org.eclipse.jetty.ee10.websocket</groupId>
        <artifactId>jetty-ee10-websocket-jakarta-server</artifactId>
        <version>12.0.13</version>
    </dependency>
    <dependency>
        <groupId>org.eclipse.jetty.ee10</groupId>
        <artifactId>jetty-ee10-servlet</artifactId>
        <version>12.0.13</version>
        <scope>test</scope>
    </dependency>

           // [...] pom.xml 其他内容

Start.java启动代码 #

public static void main(String[] args) throws Exception {
    System.setProperty("wicket.configuration", "development");

    Server server = new Server();

    HttpConfiguration httpConfig = new HttpConfiguration();
    httpConfig.setSecureScheme("https");
    httpConfig.setSecurePort(8443);
    httpConfig.setOutputBufferSize(32768);

    ServerConnector http = new ServerConnector(server, new HttpConnectionFactory(httpConfig));
    http.setPort(8080);
    http.setIdleTimeout(1000 * 60 * 60);

    server.addConnector(http);

    WebAppContext bb = new WebAppContext();
    bb.setServer(server);
    bb.setContextPath("/");
    bb.setWar("src/main/webapp");

    bb.addEventListener(new Listener());  // 预期用于Wicket-CDI注入

    ServletContextHandler contextHandler = ServletContextHandler.getServletContextHandler(bb.getServletContext());
    JakartaWebSocketServletContainerInitializer.configure(contextHandler,
            (servletContext, container) -> container.addEndpoint(new WicketServerEndpointConfig()));

    server.setHandler(bb);

    MBeanServer mBeanServer = ManagementFactory.getPlatformMBeanServer();
    MBeanContainer mBeanContainer = new MBeanContainer(mBeanServer);
    server.addEventListener(mBeanContainer);
    server.addBean(mBeanContainer);

    try {
        server.start();
        server.join();
    } catch (Exception e) {
        e.printStackTrace();
        System.exit(100);
    }
}

运行时错误日志 #

org.jboss.weld.environment.deployment.discovery.ReflectionDiscoveryStrategy processAnnotatedDiscovery
INFO: WELD-ENV-000014: Falling back to Java Reflection for bean-discovery-mode="annotated" discovery. Add org.jboss:jandex to the classpath to speed-up startup.
org.jboss.weld.bootstrap.WeldStartup startContainer
Transactional services not available. Injection of @Inject UserTransaction not available. Transactional observers will be invoked synchronously.
org.jboss.weld.environment.servlet.WeldServletLifecycle initialize
INFO: WELD-ENV-001001: No supported servlet container detected, CDI injection will NOT be available in Servlets, Filters or Listeners
[INFO] Session workerName=node0
[INFO] Started oeje10mp.MavenWebAppContext@1f10fec6{tractorStore,/,b=file://my-app/src/main/webapp/,a=AVAILABLE,h=oeje10s.SessionHandler@144e36ae{STARTED}}{file://my-app/src/main/webapp/}
org.jboss.weld.environment.servlet.Listener contextInitialized
INFO: WELD-ENV-001006: org.jboss.weld.environment.servlet.EnhancedListener used to initialize Weld
org.jboss.weld.environment.servlet.EnhancedListener contextInitialized
INFO: WELD-ENV-001009: org.jboss.weld.environment.servlet.Listener used for ServletRequest and HttpSession notifications
[main] INFO org.apache.wicket.util.file.WebXmlFile - web.xml: url mapping found for filter with name wicket.tractorStore: [/*]
[main] INFO org.apache.wicket.Application - [wicket.tractorStore] init: Wicket core library initializer
[main] INFO org.apache.wicket.protocol.http.WebApplication - [wicket.tractorStore] Started Wicket version 10.1.0 in DEVELOPMENT mode

关键问题日志：

INFO: WELD-ENV-001001: No supported servlet container detected, CDI injection will NOT be available in Servlets, Filters or Listeners

解决方案 #

1. 在WEB-INF目录下添加beans.xml文件：

<beans xmlns="http://xmlns.jcp.org/xml/ns/javaee"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee
                           http://xmlns.jcp.org/xml/ns/javaee/beans_1_1.xsd"
       bean-discovery-mode="all">
</beans>

2. 在WicketApplication.java中添加CDI配置代码：

CdiConfiguration cdiConfiguration = new CdiConfiguration();
cdiConfiguration.configure(this);

内容的提问来源于stack exchange，提问作者aukevanoost