--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/test/jdk/jdk/jfr/jvm/TestGetAllEventClasses.java Tue May 15 20:24:34 2018 +0200
@@ -0,0 +1,124 @@
+/*
+ * 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
+ * @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
+ private static void assertEvents(JVM jvm, boolean inclusion, Class<? extends Event>... targetEvents) {
+ final List<Class<? extends Event>> 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 {}
+}