test/jdk/jdk/jfr/api/flightrecorder/TestAddPeriodicEvent.java
changeset 50113 caf115bb98ad
child 51214 67736b4846a0
--- /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);
+    }
+}