Problem getting component from AbstractResource

[skunk]

Hello,

I am trying to implement an abstract resource to serve files retrieved from a database with GET requests.

@Scope(ScopeType.APPLICATION)
@Name("fileDownloader")
@BypassInterceptors
@Install(precedence=Install.BUILT_IN)
public class FileDownloader extends AbstractResource {

     @Override
     public void getResource(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
          
          EntityManager entityManager = (EntityManager) Component.getInstance("entityManager");
          UserHome userHome = (UserHome) Contexts.getSessionContext().get("userHome"); // FIXME
          
          String name = request.getParameter("name");
          Query q = entityManager.createNamedQuery("news.file.name.byrole").setParameter("name", name);
          if(userHome != null && userHome.getUser() != null) {
               q.setParameter("roles", userHome.getUser().getAppRoles());
          } else {
               q.setParameter("roles", null);
          }
          try {
               Document doc = (Document) q.getSingleResult();
               response.setContentType(doc.getContentType());
               response.setHeader("Content-Disposition", "attachment;filename=\"" + doc.getName() + "\"");     
               response.getOutputStream().write(doc.getFile().getData());
          } catch (NoResultException e) {
               response.sendError(HttpServletResponse.SC_NOT_FOUND);
          } finally {
               response.getOutputStream().flush();
               response.getOutputStream().close();
          }
     }

     @Override
     public String getResourcePath() {
          return "/newsAttachment";
     }
}

entityManager is always found, but userHome never is. In conversation-scoped SFSBs, I can inject userHome with @In, no problems.

I have tried with both Component.getInstance (injects something, but not the correct component - userHome.getUser() is null) and Contexts.getSessionContext.get() (just returns null, I believe).

Why can this component not be found?

Thanks,

Dave

[bravocharlie.seam.signup.benny.me.uk]

You need to wrap your resource code in a ContextualHttpServletRequest

@Scope(ScopeType.APPLICATION)
@Name("fileDownloader")
@BypassInterceptors
@Install(precedence=Install.BUILT_IN)
public class FileDownloader extends AbstractResource {

     @Override
     public void getResource(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

                new ContextualHttpServletRequest(request){

                       @Override
                       public void process(){
                             // logic goes here!
                       }

                }.run();
          
     }

     @Override
     public String getResourcePath() {
          return "/newsAttachment";
     }
}

[skunk]

Thanks Ben, works perfectly now.

Dave