--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/test/jdk/jdk/jfr/api/flightrecorder/TestAddPeriodicEvent.java Tue May 15 20:24:34 2018 +0200
@@ -0,0 +1,106 @@
+/*
+ * 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.assertFalse;
+import static jdk.test.lib.Asserts.assertTrue;
+
+import java.time.Duration;
+import java.util.concurrent.CountDownLatch;
+
+import jdk.jfr.Event;
+import jdk.jfr.FlightRecorder;
+import jdk.jfr.Recording;
+
+/*
+ * @test
+ * @summary
+ * @key jfr
+ * @library /test/lib
+ * @run main/othervm jdk.jfr.api.flightrecorder.TestAddPeriodicEvent
+ */
+public class TestAddPeriodicEvent {
+
+ private static class MyEvent extends Event {
+
+ }
+
+ CountDownLatch latch = new CountDownLatch(3);
+
+ class MyHook implements Runnable {
+
+ private int eventCounter;
+ private long previousTime;
+
+ @Override
+ public void run() {
+ log("Commiting event " + (++eventCounter));
+ if (previousTime == 0) {
+ previousTime = System.currentTimeMillis();
+ } else {
+ long nowTime = System.currentTimeMillis();
+ long elapsedTime = nowTime - previousTime;
+ previousTime = nowTime;
+ log("Elapsed time since the previous event: " + elapsedTime);
+ }
+
+ commitEvent();
+ latch.countDown();
+ }
+
+ private void commitEvent() {
+ MyEvent event = new MyEvent();
+ event.commit();
+ }
+ }
+
+ public static void main(String[] args) throws Exception {
+ new TestAddPeriodicEvent().doTest(1000, 3);
+ }
+
+ private void doTest(long eventDuration, int numOfEvents) throws Exception {
+ latch = new CountDownLatch(numOfEvents);
+ MyHook hook = new MyHook();
+
+ Recording r = new Recording();
+ r.enable(MyEvent.class).withPeriod(Duration.ofMillis(eventDuration));
+ r.start();
+
+ FlightRecorder.addPeriodicEvent(MyEvent.class, hook);
+
+ latch.await();
+
+ assertTrue(FlightRecorder.removePeriodicEvent(hook));
+ assertFalse(FlightRecorder.removePeriodicEvent(hook));
+
+ r.stop();
+ r.close();
+ }
+
+ private static void log(String text) {
+ System.out.println(text);
+ }
+}