Dropwizard + Jersey: "Not inside the request area" when creating a custom annotation

Question

I have a simple Dropstar 0.8.1 REST service that pulls on Jersey 2.17. Before the REST / Jetty service, I have an authentication service that adds some authorization information to the HTTP header that is passed to my Dropwizard application.

I would really like to create a custom annotation in my resource that hides all the messy garbage of the POJO parsing header. Something like that:

 @Path("/v1/task")
 @Produces(MediaType.APPLICATION_JSON)
 @Consumes(MediaType.APPLICATION_JSON)
 public class TaskResource {

      @UserContext                               // <-- custom/magic annotation
      private UserContextData userContextData;   // <-- holds all authorization info

      @GET
      public Collection<Task> fetch() {
           // use the userContextData to differentiate what data to return
      }

I spent the last day looking back at stackoverflow and finding several other people who had the same problem and appeared (?) To get some satisfaction, but I can’t avoid getting “Not inside the request area” when I try to do this .

, 22.1 22.2 : https://jersey.java.net/documentation/2.17/ioc.html

( Dropwizard ), "@SessionInject" , " " . ?

:

  @Path("/v1/task")
  @Produces(MediaType.APPLICATION_JSON)
  @Consumes(MediaType.APPLICATION_JSON)
  public class TaskResource {

       private final TaskDAO taskDAO;

       @Context
       private HttpServletRequest httpRequest;

       @SessionInject
       private HttpSession httpSession;

       public TaskResource(TaskDAO taskDAO) {
           this.taskDAO = taskDAO;
       }

       @GET
       public Collection<Task> fetch(@SessionInject HttpSession httpSession) {              
           if (httpSession != null) {
                logger.info("TOM TOM TOM httpSession isn't null: {}", httpSession);
           }
           else {
                logger.error("TOM TOM TOM httpSession is null");
           }
           return taskDAO.findAllTasks();
       }

SessionInjectResolver:

package com.foo.admiral.integration.jersey;

import com.foo.admiral.integration.core.SessionInject;
import javax.inject.Inject;
import javax.inject.Named;

import javax.servlet.http.HttpSession;
import org.glassfish.hk2.api.Injectee;

import org.glassfish.hk2.api.InjectionResolver;
import org.glassfish.hk2.api.ServiceHandle;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class SessionInjectResolver implements InjectionResolver<SessionInject> {

    private static final Logger logger = LoggerFactory.getLogger(HttpSessionFactory.class);

    @Inject
    @Named(InjectionResolver.SYSTEM_RESOLVER_NAME)
    InjectionResolver<Inject> systemInjectionResolver;

    @Override
    public Object resolve(Injectee injectee, ServiceHandle<?> handle) {
        if (HttpSession.class == injectee.getRequiredType()) {
            return systemInjectionResolver.resolve(injectee, handle);
        }

        return null;
    }

    @Override
    public boolean isConstructorParameterIndicator() {
        return false;
    }

    @Override
    public boolean isMethodParameterIndicator() {
        return false;
    }
}

HttpSessionFactory:

package com.foo.admiral.integration.jersey;

import javax.inject.Inject;
import javax.inject.Singleton;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;
import org.glassfish.hk2.api.Factory;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

@Singleton
public class HttpSessionFactory implements Factory<HttpSession> {

    private static final Logger logger = LoggerFactory.getLogger(HttpSessionFactory.class);
    private final HttpServletRequest request;

    @Inject
    public HttpSessionFactory(HttpServletRequest request) {
        logger.info("Creating new HttpSessionFactory with request");
        this.request = request;
    }

    @Override
    public HttpSession provide() {
        logger.info("Providing a new session if one does not exist");
        return request.getSession(true);
    }

    @Override
    public void dispose(HttpSession t) {
    }
}

:

package com.foo.admiral.integration.core;

import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;

@Retention(RetentionPolicy.RUNTIME)
@Target({ElementType.FIELD})
public @interface SessionInject {
}

, , Application Dropwizard:

@Override
public void run(TodoConfiguration configuration, Environment environment) throws Exception {
    ...

    environment.jersey().register(new AbstractBinder() {
        @Override
        protected void configure() {
            bindFactory(HttpSessionFactory.class).to(HttpSession.class);

            bind(SessionInjectResolver.class)
                    .to(new TypeLiteral<InjectionResolver<SessionInject>>() { })
                    .in(Singleton.class);
        }
    });

:

Caused by: java.lang.IllegalStateException: Not inside a request scope.
at jersey.repackaged.com.google.common.base.Preconditions.checkState(Preconditions.java:149)
at org.glassfish.jersey.process.internal.RequestScope.current(RequestScope.java:233)
at org.glassfish.jersey.process.internal.RequestScope.findOrCreate(RequestScope.java:158)
at org.jvnet.hk2.internal.MethodInterceptorImpl.invoke(MethodInterceptorImpl.java:74)
at org.jvnet.hk2.internal.MethodInterceptorInvocationHandler.invoke(MethodInterceptorInvocationHandler.java:62)
at com.sun.proxy.$Proxy72.getSession(Unknown Source)
at com.foo.admiral.integration.jersey.HttpSessionFactory.provide(HttpSessionFactory.java:29)
at com.foo.admiral.integration.jersey.HttpSessionFactory.provide(HttpSessionFactory.java:14)

, :

1) , HttpSessionFactory , , Factory DropWizard.

2) () , , ( HTTPSession - , , Factory ...)

 public Collection<Task> fetch(@SessionInject HttpSession httpSession) {

3) , , "" environment.jersey(). () environment.jersey(). GetResourceConfig(). ()... , .

- ? !

Answer 1

. , :

• TaskResource , .class. ( ).

  register(new TaskResource()); 
  /* instead of */ 
  register(TaskResource.class);
  

  , . ( - . )

• , , TaskResource , HttpServletRequest . , , factory . , .

, , , , - - .

, , TaskResource , TaskResource @Singleton. , . , @Singleton.

, , , , ( , ), .

, , , , , , . , . . - , , .

UPDATE

2

.

• jersey 2 HttpRequest singleton. .