Bill the Plumber

One thing I’ve forgotten to document thoroughly is how to add objects that are injectable via the @javax.ws.rs.core.Context.  Usually you’ll want to use CDI or Spring to inject your dependencies or configuration into a provider or a service, but you may have situations where you cannot depend on these facilities being available to you.

import org.jboss.resteasy.core.Dispatcher;

import javax.ws.rs.core.Application;
import javax.ws.rs.core.Context;
import java.io.InputStream;
import java.util.HashSet;
import java.util.Set;

public class MyApplication extends Application
{
   public MyApplication(@Context Dispatcher dispatcher)
   {
      MyClass myInstance = new MyClass();
      dispatcher.getDefaultContextObjects().put(MyClass.class, myInstance);
   }

}

The myInstance variable is now available for injection via the @Context annotation.