--- /dev/null 2020-01-02 04:43:18.583999853 +0000 +++ new/test/jdk/jfr/api/recording/destination/TestDestToDiskFalse.java 2020-01-30 06:30:39.926553082 +0000 @@ -0,0 +1,80 @@ +/* + * 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.recording.destination; + + +import static jdk.test.lib.Asserts.assertEquals; + +import java.nio.file.Files; +import java.nio.file.Path; +import java.nio.file.Paths; +import java.util.List; + +import jdk.jfr.Recording; +import jdk.jfr.consumer.RecordedEvent; +import jdk.jfr.consumer.RecordingFile; +import jdk.test.lib.Asserts; +import jdk.test.lib.jfr.SimpleEventHelper; + +/** + * @test + * @summary Basic test for setDestination with disk=false + * @key jfr + * + * @library /lib / + * @run main/othervm jdk.jfr.api.recording.destination.TestDestToDiskFalse + */ +public class TestDestToDiskFalse { + + public static void main(String[] args) throws Throwable { + final Path dest = Paths.get(".", "my.jfr"); + Recording r = new Recording(); + SimpleEventHelper.enable(r, true); + r.setToDisk(false); + r.setDestination(dest); + Asserts.assertEquals(dest, r.getDestination(), "Wrong get/set destination"); + r.start(); + SimpleEventHelper.createEvent(0); + r.stop(); + + // setToDisk(false) should not effect setDestination. + // We should still get a file when the recording stops. + Asserts.assertTrue(Files.exists(dest), "No recording file: " + dest); + System.out.printf("File size=%d, getSize()=%d%n", Files.size(dest), r.getSize()); + Asserts.assertNotEquals(Files.size(dest), 0L, "File length 0. Should at least be some bytes"); + + List events = RecordingFile.readAllEvents(dest); + Asserts.assertFalse(events.isEmpty(), "No event found"); + System.out.printf("Found event %s%n", events.get(0).getEventType().getName()); + + assertEquals(r.getSize(), 0L, "getSize() should return 0, chunks should have been released at stop"); + // getDestination() should return null after recording have been written to file. + Asserts.assertNull(r.getDestination(), "getDestination() should return null after file created"); + + r.close(); + } + +}