Keeping server reference within Instance

Signed-off-by: Markus KARG <markus@headcrashing.eu>

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

@@ -110,9 +110,9 @@ public CompletionStage<JAXRS.Instance> bootstrap(final Application application,
  final Class<Server> httpServerClass = (Class<Server>) configuration
  .property(ServerProperties.HTTP_SERVER_CLASS);
 
- final Server server = ServerFactory.createServer(httpServerClass, application, configuration);
-
  return new JAXRS.Instance() {
+ private final Server server = ServerFactory.createServer(httpServerClass, application, configuration);
+
  @Override
  public final Configuration configuration() {
  return new JAXRS.Configuration() {
@@ -125,7 +125,7 @@ public final Object property(final String name) {
 
  @Override
  public final CompletionStage<StopResult> stop() {
- return server.stop().thenApply(nativeResult -> new StopResult() {
+ return this.server.stop().thenApply(nativeResult -> new StopResult() {
 
  @Override
  public final <T> T unwrap(final Class<T> nativeClass) {
@@ -136,8 +136,8 @@ public final <T> T unwrap(final Class<T> nativeClass) {
 
  @Override
  public final <T> T unwrap(final Class<T> nativeClass) {
- return nativeClass.isInstance(server) ? nativeClass.cast(server)
- : server.unwrap(nativeClass);
+ return nativeClass.isInstance(this.server) ? nativeClass.cast(this.server)
+ : this.server.unwrap(nativeClass);
  }
  };
  });