1 /*
2 * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 package jdk.jfr.api.flightrecorder;
27
28 import java.io.IOException;
29 import java.io.InputStream;
30 import java.time.Duration;
31 import java.time.Instant;
32 import java.util.ArrayList;
33 import java.util.List;
34
35 import jdk.jfr.FlightRecorder;
36 import jdk.jfr.Recording;
37 import jdk.jfr.RecordingState;
38 import jdk.jfr.consumer.RecordedEvent;
39 import jdk.test.lib.Asserts;
40 import jdk.test.lib.jfr.Events;
41 import jdk.test.lib.jfr.SimpleEvent;
42
43 /* @test
44 * @key jfr
45 * @requires vm.hasJFR
46 * @library /test/lib
47 * @run main/othervm jdk.jfr.api.flightrecorder.TestSnapshot
48 */
49 public class TestSnapshot {
50 private final static int RECORDING_COUNT = 5;
51
52 public static void main(String[] args) throws Exception {
53 testEmpty();
54 testStopped();
55 testOngoingDisk();
56 testOngoingMemory();
57 testMultiple();
58 }
59
60 private static void testMultiple() throws IOException {
61 FlightRecorder recorder = FlightRecorder.getFlightRecorder();
62 List<Recording> recordings = new ArrayList<>();
63 long size = 0;
64 for (int i = 0; i < RECORDING_COUNT; i++) {
65 Recording r = new Recording();
66 r.enable(SimpleEvent.class);
67 r.start();
68 SimpleEvent se = new SimpleEvent();
69 se.commit();
70 r.stop();
71 recordings.add(r);
72 size += r.getSize();
73 }
74 try (Recording snapshot = recorder.takeSnapshot()) {
75 Asserts.assertEquals(snapshot.getSize(), size);
76 Asserts.assertGreaterThanOrEqual(snapshot.getStartTime(), recordings.get(0).getStartTime());
77 Asserts.assertLessThanOrEqual(snapshot.getStopTime(), recordings.get(RECORDING_COUNT - 1).getStopTime());
78 Asserts.assertGreaterThanOrEqual(snapshot.getDuration(), Duration.ZERO);
79 assertStaticOptions(snapshot);
80 try (InputStream is = snapshot.getStream(null, null)) {
81 Asserts.assertNotNull(is);
82 }
83
84 List<RecordedEvent> events = Events.fromRecording(snapshot);
85 Events.hasEvents(events);
86 Asserts.assertEquals(events.size(), RECORDING_COUNT);
87 for (int i = 0; i < RECORDING_COUNT; i++) {
88 Asserts.assertEquals(events.get(i).getEventType().getName(), SimpleEvent.class.getName());
89 }
90 }
91 for (Recording r : recordings) {
92 r.close();
93 }
94 }
95 private static void testOngoingMemory() throws IOException {
96 testOngoing(false);
97 }
98
99 private static void testOngoingDisk() throws IOException {
100 testOngoing(true);
101 }
102
103 private static void testOngoing(boolean disk) throws IOException {
104 FlightRecorder recorder = FlightRecorder.getFlightRecorder();
105 try (Recording r = new Recording()) {
106 r.setToDisk(disk);
107 r.enable(SimpleEvent.class);
108 r.start();
109 SimpleEvent se = new SimpleEvent();
110 se.commit();
111
112 try (Recording snapshot = recorder.takeSnapshot()) {
113
114 Asserts.assertGreaterThan(snapshot.getSize(), 0L);
115 Asserts.assertGreaterThanOrEqual(snapshot.getStartTime(), r.getStartTime());
116 Asserts.assertGreaterThanOrEqual(snapshot.getStopTime(), r.getStartTime());
117 Asserts.assertGreaterThanOrEqual(snapshot.getDuration(), Duration.ZERO);
118 assertStaticOptions(snapshot);
119 try (InputStream is = snapshot.getStream(null, null)) {
120 Asserts.assertNotNull(is);
121 }
122
123 List<RecordedEvent> events = Events.fromRecording(snapshot);
124 Events.hasEvents(events);
125 Asserts.assertEquals(events.size(), 1);
126 Asserts.assertEquals(events.get(0).getEventType().getName(), SimpleEvent.class.getName());
127 }
128
129 r.stop();
130 }
131 }
132
133 private static void assertStaticOptions(Recording snapshot) {
134 Asserts.assertTrue(snapshot.getName().startsWith("Snapshot"), "Recording name should begin with 'Snapshot'");
135 Asserts.assertEquals(snapshot.getMaxAge(), null);
136 Asserts.assertEquals(snapshot.getMaxSize(), 0L);
137 Asserts.assertTrue(snapshot.getSettings().isEmpty());
138 Asserts.assertEquals(snapshot.getState(), RecordingState.STOPPED);
139 Asserts.assertEquals(snapshot.getDumpOnExit(), false);
140 Asserts.assertEquals(snapshot.getDestination(), null);
141 }
142
143 private static void testStopped() throws IOException {
144 FlightRecorder recorder = FlightRecorder.getFlightRecorder();
145 try (Recording r = new Recording()) {
146 r.enable(SimpleEvent.class);
147 r.start();
148 SimpleEvent se = new SimpleEvent();
149 se.commit();
150 r.stop();
151
152 try (Recording snapshot = recorder.takeSnapshot()) {
153
154 Asserts.assertEquals(snapshot.getSize(), r.getSize());
155 Asserts.assertGreaterThanOrEqual(snapshot.getStartTime(), r.getStartTime());
156 Asserts.assertLessThanOrEqual(snapshot.getStopTime(), r.getStopTime());
157 Asserts.assertGreaterThanOrEqual(snapshot.getDuration(), Duration.ZERO);
158 assertStaticOptions(snapshot);
159 try (InputStream is = snapshot.getStream(null, null)) {
160 Asserts.assertNotNull(is);
161 }
162
163 List<RecordedEvent> events = Events.fromRecording(snapshot);
164 Events.hasEvents(events);
165 Asserts.assertEquals(events.size(), 1);
166 Asserts.assertEquals(events.get(0).getEventType().getName(), SimpleEvent.class.getName());
167 }
168 }
169 }
170
171 private static void testEmpty() throws IOException {
172 FlightRecorder recorder = FlightRecorder.getFlightRecorder();
173 Instant before = Instant.now().minusNanos(1);
174 try (Recording snapshot = recorder.takeSnapshot()) {
175 Instant after = Instant.now().plusNanos(1);
176 Asserts.assertEquals(snapshot.getSize(), 0L);
177 Asserts.assertLessThan(before, snapshot.getStartTime());
178 Asserts.assertGreaterThan(after, snapshot.getStopTime());
179 Asserts.assertEquals(snapshot.getStartTime(), snapshot.getStopTime());
180 Asserts.assertEquals(snapshot.getDuration(), Duration.ZERO);
181 assertStaticOptions(snapshot);
182 Asserts.assertEquals(snapshot.getStream(null, null), null);
183 }
184 }
185
186 }