--- /dev/null	2017-11-09 09:38:01.297999907 +0100
+++ new/test/jdk/jdk/jfr/api/flightrecorder/MyListener.java	2018-04-09 16:42:44.604813139 +0200
@@ -0,0 +1,48 @@
+/*
+ * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.jfr.api.flightrecorder;
+
+import static jdk.test.lib.Asserts.assertEquals;
+
+import jdk.jfr.FlightRecorderListener;
+import jdk.jfr.Recording;
+import jdk.jfr.RecordingState;
+
+public class MyListener implements FlightRecorderListener {
+    public RecordingState state = RecordingState.NEW;
+    public int countCallbacks = 0;
+
+    @Override
+    public synchronized void recordingStateChanged(Recording r) {
+        ++countCallbacks;
+        state = r.getState();
+    }
+
+    public synchronized void verifyState(int expectedCountCallbacks, RecordingState expectedState) {
+        assertEquals(state, expectedState, "listener.state=" + expectedState);
+        assertEquals(countCallbacks, expectedCountCallbacks, "listener.countCallbacks=" + countCallbacks);
+    }
+}