CompletionStage returned from the resource method will use completer thread for response processing.

Change-Id: Ibea972c19a0133ca63a6ba9f9716356c7932c86f

Author: pavelbucek

core-server/src/main/java/org/glassfish/jersey/server/ServerRuntime.java

@@ -854,11 +854,6 @@ public void run() {
             });
         }
 
-        @Override
-        public void invokeManaged(Runnable runnable) {
-            responder.runtime.managedAsyncExecutor.get().submit(runnable);
-        }
-
         @Override
         public boolean suspend() {
             synchronized (stateLock) {

core-server/src/main/java/org/glassfish/jersey/server/internal/process/AsyncContext.java

@@ -97,11 +97,4 @@ public static enum State {
      * @param producer response producer.
      */
     public void invokeManaged(Producer<Response> producer);
-
-    /**
-     * Invoke the provided runnable in a Jersey-managed asynchronous thread.
-     *
-     * @param runnable to be invoked.
-     */
-    public void invokeManaged(Runnable runnable);
 }

core-server/src/main/java/org/glassfish/jersey/server/model/ResourceMethodInvoker.java

@@ -426,9 +426,7 @@ public ContainerResponse apply(final RequestProcessingContext processingContext)
                     }
 
                     // wait for a response
-                    completableFuture.whenCompleteAsync(
-                            whenComplete(processingContext),
-                            command -> processingContext.asyncContext().invokeManaged(command));
+                    completableFuture.whenComplete(whenComplete(processingContext));
 
                     return null; // return null on the current thread
                 }