如何在 Guice Servlet 中使用 servlet-name 进行过滤器映射？

Question

在我的 web.xml 中有

<filter>
    <filter-name>authFilter</filter-name>
    <filter-class>com.mystuff.AuthFilter</filter-class>
</filter>

<filter-mapping>
    <filter-name>authFilter</filter-name>
    <servlet-name>requestFactoryServlet</servlet-name>
</filter-mapping>

<!-- Servlets -->
<servlet>
    <servlet-name>requestFactoryServlet</servlet-name>
    <servlet-class>com.google.web.bindery.requestfactory.server.RequestFactoryServlet</servlet-class>
    <init-param>
        <param-name>symbolMapsDirectory</param-name>
        <!-- You'll need to compile with -extras and move the symbolMaps directory 
            to this location if you want stack trace deobfuscation to work -->
        <param-value>WEB-INF/classes/symbolMaps/</param-value>
    </init-param>
</servlet>

<servlet-mapping>
    <servlet-name>requestFactoryServlet</servlet-name>
    <url-pattern>/gwtRequest</url-pattern>
</servlet-mapping>

我正在尝试将其转换为使用 Guice Servlet 配置而不是 web.xml 配置。

我不知道如何做与 Guice 中的等效项。我只看到了如何过滤模式的示例，而不是特定的 servlet。

Answer 1

在 web.xml 中定义一个 Guice 监听器：

<listener>
    <listener-class>xxx.GuiceServletConfig</listener-class>
</listener>

并实现这个监听器：

public class GuiceServletConfig extends GuiceServletContextListener {

    @Override
    protected Injector getInjector() {
        return Guice.createInjector(new ServletModule() {

            @Override
            protected void configureServlets() {
                Map<String, String> params = new HashMap<String, String>();
                params.put("symbolMapsDirectory", "WEB-INF/classes/symbolMaps/");
                serve("/gwtRequest").with(RequestFactoryServlet.class, params);


            }

        });
    }

}