--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/test/jdk/jdk/jfr/api/consumer/filestream/TestReuse.java Mon May 27 22:59:18 2019 +0200
@@ -0,0 +1,104 @@
+/*
+ * 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.filestream;
+
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.util.HashMap;
+import java.util.IdentityHashMap;
+import java.util.Map;
+
+import jdk.jfr.Event;
+import jdk.jfr.Recording;
+import jdk.jfr.consumer.EventStream;
+import jdk.jfr.consumer.RecordedEvent;
+
+/**
+ * @test
+ * @summary Test EventStream::setReuse(...)
+ * @key jfr
+ * @requires vm.hasJFR
+ * @library /test/lib
+ * @run main/othervm jdk.jfr.api.consumer.filestream.TestReuse
+ */
+public class TestReuse {
+
+ static class ReuseEvent extends Event {
+ }
+
+ public static void main(String... args) throws Exception {
+ Path p = makeRecording();
+
+ testSetReuseTrue(p);
+ testSetReuseFalse(p);
+ }
+
+ private static void testSetReuseFalse(Path p) throws IOException {
+ Map<RecordedEvent, RecordedEvent> identity = new IdentityHashMap<>();
+ try (EventStream es = EventStream.openFile(p)) {
+ es.setReuse(false);
+ es.onEvent(e -> {
+ if (identity.containsKey(e)) {
+ throw new Error("Unexpected reuse!");
+ }
+ identity.put(e,e);
+ });
+ es.start();
+ }
+ }
+
+ private static void testSetReuseTrue(Path p) throws IOException {
+ try (EventStream es = EventStream.openFile(p)) {
+ es.setReuse(true);
+ RecordedEvent[] events = new RecordedEvent[1];
+ es.onEvent(e -> {
+ if (events[0] == null) {
+ events[0] = e;
+ } else {
+ if (e != events[0]) {
+ throw new Error("No reuse");
+ }
+ }
+ });
+ es.start();
+ }
+ }
+
+ private static Path makeRecording() throws IOException {
+ try (Recording r = new Recording()) {
+ r.start();
+ for (int i = 0; i < 2_000_000; i++) {
+ ReuseEvent e = new ReuseEvent();
+ e.commit();
+ }
+ r.stop();
+ Path p = Files.createTempFile("recording", ".jfr");
+ r.dump(p);
+ return p;
+ }
+ }
+}