test/jdk/jdk/jfr/api/consumer/streaming/TestRemovedChunks.java
changeset 58863 c16ac7a2eba4
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/jdk/jdk/jfr/api/consumer/streaming/TestRemovedChunks.java	Wed Oct 30 19:43:52 2019 +0100
@@ -0,0 +1,126 @@
+/*
+ * Copyright (c) 2019, 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.consumer.streaming;
+
+import java.util.concurrent.CountDownLatch;
+
+import jdk.jfr.Event;
+import jdk.jfr.Recording;
+import jdk.jfr.consumer.RecordingStream;
+
+/**
+ * @test
+ * @summary Tests that a stream can gracefully handle chunk being removed
+ * @key jfr
+ * @requires vm.hasJFR
+ * @library /test/lib
+ * @run main/othervm -Xlog:jfr*=info jdk.jfr.api.consumer.streaming.TestRemovedChunks
+ */
+public class TestRemovedChunks {
+    private final static CountDownLatch parkLatch = new CountDownLatch(1);
+    private final static CountDownLatch removalLatch = new CountDownLatch(1);
+    private final static CountDownLatch IFeelFineLatch = new CountDownLatch(1);
+
+    static class DataEvent extends Event {
+        double double1;
+        double double2;
+        double double3;
+        double double4;
+        double double5;
+    }
+
+    static class ParkStream extends Event {
+    }
+
+    static class IFeelFine extends Event {
+    }
+
+    public static void main(String... args) throws Exception {
+
+        try (RecordingStream s = new RecordingStream()) {
+            s.setMaxSize(5_000_000);
+            s.onEvent(ParkStream.class.getName(), e -> {
+                parkLatch.countDown();
+                await(removalLatch);
+
+            });
+            s.onEvent(IFeelFine.class.getName(), e -> {
+                IFeelFineLatch.countDown();
+            });
+            s.startAsync();
+            // Fill first chunk with data
+            emitData(1_000_000);
+            // Park stream
+            ParkStream ps = new ParkStream();
+            ps.commit();
+            await(parkLatch);
+            // Rotate and emit data that exceeds maxSize
+            for (int i = 0; i< 10;i++) {
+                try (Recording r = new Recording()) {
+                    r.start();
+                    emitData(1_000_000);
+                }
+            }
+            // Emit final event
+            IFeelFine i = new IFeelFine();
+            i.commit();
+            // Wake up parked stream
+            removalLatch.countDown();
+            // Await event things gone bad
+            await(IFeelFineLatch);
+        }
+    }
+
+    private static void await(CountDownLatch latch) throws Error {
+        try {
+            latch.await();
+        } catch (InterruptedException e1) {
+            throw new Error("Latch interupted");
+        }
+    }
+
+    private static void emitData(int amount) throws InterruptedException {
+        int count = 0;
+        while (amount > 0) {
+            DataEvent de = new DataEvent();
+            // 5 doubles are 40 bytes bytes
+            // and event size, event type, thread,
+            // start time, duration and stack trace about 15 bytes
+            de.double1 = 0.0;
+            de.double2 = 1.0;
+            de.double3 = 2.0;
+            de.double4 = 3.0;
+            de.double5 = 4.0;
+            de.commit();
+            amount -= 55;
+            count++;
+            //
+            if (count % 100_000 == 0) {
+                Thread.sleep(10);
+            }
+        }
+    }
+}