java - Jersey 2.0 - Glassfish 4 Actor 异常

Question

我正在尝试部署一个简单的应用程序，该应用程序使用 jersey 和 glassfish 4 显示 Restful 服务的状态。我收到以下异常:

org.glassfish.jersey.internal.ServiceConfigurationError: 
org.glassfish.jersey.internal.spi.AutoDiscoverable: The class 
org.glassfish.jersey.server.internal.monitoring.MonitoringAutodiscoverable implementing 
provider interface org.glassfish.jersey.internal.spi.AutoDiscoverable could not be 
instantiated: Cannot cast 
org.glassfish.jersey.server.internal.monitoring.MonitoringAutodiscoverable to 
org.glassfish.jersey.internal.spi.AutoDiscoverable

我的 web.xml 看起来像这样

<web-app>
<servlet>
  <servlet-name>Servlet</servlet-name>
  <servlet-class>org.glassfish.jersey.servlet.ServletContainer</servlet-class>
</servlet>

<servlet-mapping>
  <servlet-name>Servlet</servlet-name>
  <url-pattern>/*</url-pattern>
</servlet-mapping>
</web-app>

我的服务如下所示:

@Path(MyServices.SERVICE_URL)
public class MyServices
{
   @GET
   @Produces("text/html")
   public String getStatus()
   {
      return "My service is running.";
   }
}

有人知道我在这里做错了什么吗？

编辑我将此类添加到我的 war 项目中:

@ApplicationPath("/*")
public class MyApplication extends ResourceConfig
{
   public MyApplication()
   {
      packages("com.java.services");
   }
}

我仍然遇到同样的异常:

javax.servlet.ServletException: Servlet.init() for servlet com.java.services.MyApplication threw exception

Answer 1

GlassFish 4.0 是一个 Servlet 3.x 容器，因此您必须更改 deployment model

<!-- Servlet declaration can be omitted in which case
     it would be automatically added by Jersey -->
<servlet>
    <servlet-name>javax.ws.rs.core.Application</servlet-name>
</servlet>

<servlet-mapping>
    <servlet-name>javax.ws.rs.core.Application</servlet-name>
    <url-pattern>/resources/*</url-pattern>
</servlet-mapping>

但即使这个 web.xml 设置也不再需要，只需实现 Application带有 @ApplicationPath 注释的子类一切都会按预期进行

@ApplicationPath("resources")
public class MyApplication extends ResourceConfig {
    public MyApplication() {
        packages("org.foo.rest;org.bar.rest");
    }
}

<小时/>

结果