在泽西过滤器中注入EJB [英] Inject EJB in Jersey filter

问题描述

我正在开发一个应用程序，Jersey JAX-RS作为后端，AngularJS作为前端;我需要一种身份验证，所以在每个请求中，我发送一个应该由后台验证的令牌。为此，我决定创建一个泽西过滤器，将寻找该令牌，然后调用我的AuthenticateService来检查用户是否可以进行身份​​验证。
然后由 @RolesAllowed 注释管理授权。

这是我的问题：我不能在Jersey过滤器中注入EJB，因为它与资源一起工作很好，但是使用过滤器，服务始终保持 null

任何想法怎么欺骗？
谢谢

过滤代码：

  @Provider 
 @Priority（Priorities.AUTHORIZATION）
 public class AuthenticationFilter实现ContainerRequestFilter {
 
 @EJB（name = AuthenticationService.LOOKUP_NAME）
 private AuthenticationService authService; 
 
 @Override 
 public void filter（ContainerRequestContext requestContext）throws IOException {
 / ** 
 *获取头参数
 * / 
 String userIdStr = requestContext.getHeaderString（SecurityConsts.HEADER_ID_PARAMETER）; 
 int userId = 0; 
 
 if（userIdStr！= null&！userIdStr.isEmpty（））{
 userId = Integer.parseInt（userIdStr）; 
} 
 
 String securityToken = requestContext.getHeaderString（SecurityConsts.HEADER_TOKEN）; 
 
用户user = null; 
 
 / ** 
 *如果存在令牌，请尝试验证用户
 * / 
如果（securityToken！= null&！securityToken）。 isEmpty（））{
 // NullPointerException在这里发生
 user = authService.authenticateWithToken（userId，securityToken）; 
} 
 
 / ** 
 *设置正确的安全上下文
 * / 
 requestContext.setSecurityContext（new ConfiguratorSecurityContext（user））; 
} 
 
} 
  

解决方案

JAX-RS 2.0不支持将EJB注入JAX-RS组件
（提供者，资源）。

但是有一些选择来解决这个问题。

• 您可以尝试切换到CDI，例如将您的服务变为 @ManagedBean 并使用 @Inject 。




• 您可以尝试通过上下文查找获得您的服务，如下所示：

  
  

    InitialContext context = new InitialContext（）; 
   context.lookup（java：comp / env / ejb / YourBean）; 
    

  
  




• 您还可以尝试使用 @Stateless 所以它由容器管理。

你可以找到相关的JIRA here 和 here 。

另见：

• GlassFish 4 +具有@EJB的JAX-RS过滤器


• 依赖注入ResourceFilter不起作用

I am currently developing an application with Jersey JAX-RS as backend and AngularJS as frontend ; I need a sort of authentication, and so with every request I send a token that should be verify by the backend. For this, I decided to create a Jersey filter that will look for that token, and then call my AuthenticateService to check if the user can be authenticated. Authorization is then managed by @RolesAllowed annotation.

Here is my problem : I can't inject an EJB inside a Jersey filter, strangly because it works great with resources.. But with a filter, the service always stays null

Any idea how to trick it ? Thanks

Filter code :

@Provider
@Priority( Priorities.AUTHORIZATION )
public class AuthenticationFilter implements ContainerRequestFilter {

    @EJB( name=AuthenticationService.LOOKUP_NAME)
    private AuthenticationService authService;

    @Override
    public void filter( ContainerRequestContext requestContext ) throws IOException {
        /**
         * Get headers parameters
         */
        String userIdStr = requestContext.getHeaderString( SecurityConsts.HEADER_ID_PARAMETER );
        int userId = 0;

        if( userIdStr != null && !userIdStr.isEmpty() ) {
            userId = Integer.parseInt( userIdStr );
        }

        String securityToken = requestContext.getHeaderString( SecurityConsts.HEADER_TOKEN );

        User user = null;

        /**
         * If a token is present, try to authenticate the user
         */
        if( securityToken != null && !securityToken.isEmpty() ) {
                    // NullPointerException happens here
            user = authService.authenticateWithToken( userId, securityToken );
        }

        /**
         * Set correct security context
         */
        requestContext.setSecurityContext( new ConfiguratorSecurityContext( user ) );
    }

}

解决方案

This is a more or less know problem.

JAX-RS 2.0 does not support injection of EJBs into JAX-RS components (providers, resources).

But there are some options to solve this.

• You can try switching to CDI, e.g. turning your service into a @ManagedBean and using @Inject.

• You can try to get your service via context lookup, something like this:

  InitialContext context = new InitialContext();
  context.lookup("java:comp/env/ejb/YourBean");
  

• You can also try to annotate your filter with @Stateless so it gets managed by the container.

You can find related JIRAs here and here.

See also:

• GlassFish 4 + JAX-RS Filter with @EJB
• Dependency injection into ResourceFilter not working?
• How to inject EJB into ResourceFilterFactory (Jersey)

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