Question

我有一个ContainerRequestFilter来处理请求授权，我想将AuthService接口的实现注入到它的构造函数中（我使用Guice for DI）。我一直无法弄清楚如何使依赖注入工作。

我的过滤器类看起来像这样：

public class UserRoleFilter implements ContainerRequestFilter {

protected AuthService authService;

@Context
private ResourceInfo resourceInfo;

@Inject
public UserRoleFilter(AuthService authService) {
    this.authService = authService;
}

@Override
public void filter(ContainerRequestContext requestContext) {
    this.authService.doSomething(...);
}

当我运行该程序时，我从NullPointerException获得org.jboss.resteasy.core.ConstructorInjectorImpl.<init>。

我的应用程序启动是：

public static void main(String[] args) throws Exception {       
    Injector injector = Guice.createInjector(new RestApplicationModule(args));
    initServer(injector).join();
}

public static Server initServer(Injector injector) throws Exception {
    Server server = new Server(SERVER_PORT);
    ServletContextHandler servletHandler = new ServletContextHandler();
    servletHandler.setInitParameter("resteasy.role.based.security", "true");
    servletHandler.setInitParameter("resteasy.providers", UserRoleFilter.class.getName());
    servletHandler.addEventListener(injector.getInstance(GuiceResteasyBootstrapServletContextListener.class));

    servletHandler.addServlet(HttpServletDispatcher.class, "/*");

    // Create the SessionHandler (wrapper) to handle the sessions
    SessionManager manager = new HashSessionManager();
    SessionHandler sessions = new SessionHandler(manager);
    servletHandler.setSessionHandler(sessions);

    server.setHandler(servletHandler);
    server.start();
    return server;
}

private static class RestApplicationModule extends RequestScopeModule {       

    public RestApplicationModule(String[] args) {
    }

    @Override
    protected void configure() {
        super.configure();                     
        bind(AuthService.class).to(AuthServiceImpl.class);
        bind(UserRoleFilter.class);
        // Bind JAX-RS Controller classes
    }
}

通过RestEasy初始代码的内容，看起来我将@Context属性添加到我的RestEasy构造函数中的authService参数中接受它。传入代理对象并允许服务器启动，但是一旦过滤器尝试访问authService，我得到： RESTEASY003880: Unable to find contextual data of type: com.genghiszahn.authFilterTest.AuthService

RestEasy / Guice：无法将对象注入ContainerRequestFilter

0 个答案: