http://www.dropwizard.io/1.3.16/dropwizard-jersey: Dropwizard is a Java framework for developing ops-friendly, high-performance, RESTful web applications.
  • Coda Hale
  • Nick Telford
  • Graham O'Regan
  • Ryan Kennedy
  • Camille Fournier
  • Carlo Barbara
  • Matt Veitas
  • Ryan Tenney
  • Jochen Schalanda
  • Glenn McAllister
  • Nick Babcock
  • Justin Plock
  • Artem Prigoda 
package io.dropwizard.jersey.sessions;

import org.glassfish.jersey.server.internal.inject.AbstractContainerRequestValueFactory;

import javax.annotation.Nullable;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;
import javax.ws.rs.core.Context;

public final class HttpSessionFactory extends AbstractContainerRequestValueFactory<HttpSession> {
    @Context
    @Nullable
    private HttpServletRequest request;
    private boolean doNotCreate;

    public HttpSessionFactory(boolean doNotCreate) {
        this.doNotCreate = doNotCreate;
    }

    @Override
    @Nullable
    public HttpSession provide() {
        if (request == null) {
            return null;
        }

        return request.getSession(!doNotCreate);
    }
}