| /* |
| * 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.jvm; |
| |
| import jdk.jfr.Event; |
| import jdk.jfr.internal.JVM; |
| |
| import java.util.List; |
| |
| /** |
| * @test TestGetAllEventClasses |
| * @key jfr |
| * @requires vm.hasJFR |
| * @library /test/lib /test/jdk |
| * @modules jdk.jfr/jdk.jfr.internal |
| * |
| * @build jdk.jfr.jvm.HelloWorldEvent1 |
| * @build jdk.jfr.jvm.HelloWorldEvent2 |
| * @run main/othervm jdk.jfr.jvm.TestGetAllEventClasses |
| */ |
| public class TestGetAllEventClasses { |
| |
| public static void main(String... args) throws ClassNotFoundException { |
| JVM jvm = JVM.getJVM(); |
| // before creating native |
| assertEmptyEventList(jvm); |
| jvm.createNativeJFR(); |
| // after creating native |
| assertEmptyEventList(jvm); |
| |
| // Test event class load is triggered and only once |
| Class<? extends Event> clazz = initialize("jdk.jfr.jvm.HelloWorldEvent1"); |
| // check that the event class is registered |
| assertEventsIncluded(jvm, clazz); |
| // second active use of the same event class should not add another class |
| // to the list - it would already be loaded |
| clazz = initialize(clazz); |
| assertEventsIncluded(jvm, clazz); |
| |
| // second event class |
| Class<? extends Event> clazz2 = initialize("jdk.jfr.jvm.HelloWorldEvent2"); |
| // the list of event classes should now have two classes registered |
| assertEventsIncluded(jvm, clazz, clazz2); |
| |
| // verify that an abstract event class is not included |
| Class<? extends Event> abstractClass = initialize(MyAbstractEvent.class); // to run <clinit> |
| assertEventsExcluded(jvm, abstractClass); |
| |
| // verify that a class that is yet to run its <clinit> is not included in the list of event classes |
| assertEventsExcluded(jvm, MyUnInitializedEvent.class); |
| |
| // ensure old classes are not lost |
| assertEventsIncluded(jvm, clazz, clazz2); |
| |
| jvm.destroyNativeJFR(); |
| } |
| |
| private static Class<? extends Event> initialize(String name) throws ClassNotFoundException { |
| // Class.forName() will force the class to run its <clinit> method |
| return Class.forName(name).asSubclass(Event.class); |
| } |
| |
| private static Class<? extends Event> initialize(Class<? extends Event> event) throws ClassNotFoundException { |
| return initialize(event.getName()); |
| } |
| |
| private static void assertEmptyEventList(JVM jvm) { |
| if (!jvm.getAllEventClasses().isEmpty()) { |
| throw new AssertionError("should not have any event classes registered!"); |
| } |
| } |
| |
| @SafeVarargs |
| private static void assertEventsExcluded(JVM jvm, Class<? extends Event>... targetEvents) { |
| assertEvents(jvm, false, targetEvents); |
| } |
| |
| @SafeVarargs |
| private static void assertEventsIncluded(JVM jvm, Class<? extends Event>... targetEvents) { |
| assertEvents(jvm, true, targetEvents); |
| } |
| |
| @SafeVarargs |
| @SuppressWarnings("rawtypes") |
| private static void assertEvents(JVM jvm, boolean inclusion, Class<? extends Event>... targetEvents) { |
| final List list = jvm.getAllEventClasses(); |
| for (Class<? extends Event> ev : targetEvents) { |
| if (list.contains(ev)) { |
| if (inclusion) { |
| continue; |
| } |
| throw new AssertionError(ev.getName() + " in list but should not be!"); |
| } |
| if (!inclusion) { |
| continue; |
| } |
| throw new AssertionError(ev.getName() + " in not in list but should be!"); |
| } |
| } |
| |
| private static abstract class MyAbstractEvent extends Event {} |
| private static class MyUnInitializedEvent extends Event {} |
| } |