| /* |
| * 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.consumer; |
| |
| import java.nio.file.Files; |
| import java.nio.file.Path; |
| import java.util.LinkedList; |
| import java.util.List; |
| |
| import jdk.jfr.Event; |
| import jdk.jfr.Recording; |
| import jdk.jfr.consumer.RecordedEvent; |
| import jdk.jfr.consumer.RecordingFile; |
| import jdk.test.lib.Asserts; |
| |
| |
| /* |
| * @test |
| * @summary Reads the recorded file two times and verifies that both reads are the same |
| * @key jfr |
| * @library /test/lib |
| * @run main/othervm jdk.jfr.api.consumer.TestReadTwice |
| */ |
| public class TestReadTwice { |
| |
| private static class MyEvent extends Event { |
| } |
| |
| public static void main(String[] args) throws Throwable { |
| Recording r = new Recording(); |
| r.enable(MyEvent.class).withoutStackTrace(); |
| r.start(); |
| |
| // Commit a single event to the recording |
| MyEvent event = new MyEvent(); |
| event.commit(); |
| |
| r.stop(); |
| |
| // Dump the recording to a file |
| Path path = Files.createTempFile("recording", ".jfr"); |
| System.out.println("Dumping to " + path); |
| r.dump(path); |
| r.close(); |
| |
| // Read all events from the file in one go |
| List<RecordedEvent> events = RecordingFile.readAllEvents(path); |
| |
| // Read again the same events one by one |
| RecordingFile rfile = new RecordingFile(path); |
| List<RecordedEvent> events2 = new LinkedList<>(); |
| while (rfile.hasMoreEvents()) { |
| events2.add(rfile.readEvent()); |
| } |
| |
| // Compare sizes |
| Asserts.assertEquals(events.size(), events2.size()); |
| rfile.close(); |
| } |
| } |