58863
|
1 |
/*
|
|
2 |
* Copyright (c) 2019, 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.consumer;
|
|
27 |
|
|
28 |
import java.io.IOException;
|
|
29 |
import java.security.AccessControlContext;
|
|
30 |
import java.security.AccessController;
|
|
31 |
import java.time.Duration;
|
|
32 |
import java.time.Instant;
|
|
33 |
import java.util.Map;
|
|
34 |
import java.util.function.Consumer;
|
|
35 |
|
|
36 |
import jdk.jfr.Configuration;
|
|
37 |
import jdk.jfr.Event;
|
|
38 |
import jdk.jfr.EventSettings;
|
|
39 |
import jdk.jfr.EventType;
|
|
40 |
import jdk.jfr.Recording;
|
|
41 |
import jdk.jfr.internal.PlatformRecording;
|
|
42 |
import jdk.jfr.internal.PrivateAccess;
|
|
43 |
import jdk.jfr.internal.SecuritySupport;
|
|
44 |
import jdk.jfr.internal.Utils;
|
|
45 |
import jdk.jfr.internal.consumer.EventDirectoryStream;
|
|
46 |
|
|
47 |
/**
|
|
48 |
* A recording stream produces events from the current JVM (Java Virtual
|
|
49 |
* Machine).
|
|
50 |
* <p>
|
|
51 |
* The following example shows how to record events using the default
|
|
52 |
* configuration and print the Garbage Collection, CPU Load and JVM Information
|
|
53 |
* event to standard out.
|
|
54 |
* <pre>
|
|
55 |
* <code>
|
|
56 |
* Configuration c = Configuration.getConfiguration("default");
|
|
57 |
* try (var rs = new RecordingStream(c)) {
|
|
58 |
* rs.onEvent("jdk.GarbageCollection", System.out::println);
|
|
59 |
* rs.onEvent("jdk.CPULoad", System.out::println);
|
|
60 |
* rs.onEvent("jdk.JVMInformation", System.out::println);
|
|
61 |
* rs.start();
|
|
62 |
* }
|
|
63 |
* }
|
|
64 |
* </code>
|
|
65 |
* </pre>
|
|
66 |
*
|
|
67 |
* @since 14
|
|
68 |
*/
|
|
69 |
public final class RecordingStream implements AutoCloseable, EventStream {
|
|
70 |
|
|
71 |
private final Recording recording;
|
|
72 |
private final EventDirectoryStream directoryStream;
|
|
73 |
|
|
74 |
/**
|
|
75 |
* Creates an event stream for the current JVM (Java Virtual Machine).
|
|
76 |
*
|
|
77 |
* @throws IllegalStateException if Flight Recorder can't be created (for
|
|
78 |
* example, if the Java Virtual Machine (JVM) lacks Flight Recorder
|
|
79 |
* support, or if the file repository can't be created or accessed)
|
|
80 |
*
|
|
81 |
* @throws SecurityException if a security manager exists and the caller
|
|
82 |
* does not have
|
|
83 |
* {@code FlightRecorderPermission("accessFlightRecorder")}
|
|
84 |
*/
|
|
85 |
public RecordingStream() {
|
|
86 |
Utils.checkAccessFlightRecorder();
|
|
87 |
AccessControlContext acc = AccessController.getContext();
|
|
88 |
this.recording = new Recording();
|
|
89 |
this.recording.setFlushInterval(Duration.ofMillis(1000));
|
|
90 |
try {
|
|
91 |
this.directoryStream = new EventDirectoryStream(acc, null, SecuritySupport.PRIVILIGED, true);
|
|
92 |
} catch (IOException ioe) {
|
|
93 |
this.recording.close();
|
|
94 |
throw new IllegalStateException(ioe.getMessage());
|
|
95 |
}
|
|
96 |
}
|
|
97 |
|
|
98 |
/**
|
|
99 |
* Creates a recording stream using settings from a configuration.
|
|
100 |
* <p>
|
|
101 |
* The following example shows how to create a recording stream that uses a
|
|
102 |
* predefined configuration.
|
|
103 |
*
|
|
104 |
* <pre>
|
|
105 |
* <code>
|
|
106 |
* var c = Configuration.getConfiguration("default");
|
|
107 |
* try (var rs = new RecordingStream(c)) {
|
|
108 |
* rs.onEvent(System.out::println);
|
|
109 |
* rs.start();
|
|
110 |
* }
|
|
111 |
* </code>
|
|
112 |
* </pre>
|
|
113 |
*
|
|
114 |
* @param configuration configuration that contains the settings to use,
|
|
115 |
* not {@code null}
|
|
116 |
*
|
|
117 |
* @throws IllegalStateException if Flight Recorder can't be created (for
|
|
118 |
* example, if the Java Virtual Machine (JVM) lacks Flight Recorder
|
|
119 |
* support, or if the file repository can't be created or accessed)
|
|
120 |
*
|
|
121 |
* @throws SecurityException if a security manager is used and
|
|
122 |
* FlightRecorderPermission "accessFlightRecorder" is not set.
|
|
123 |
*
|
|
124 |
* @see Configuration
|
|
125 |
*/
|
|
126 |
public RecordingStream(Configuration configuration) {
|
|
127 |
this();
|
|
128 |
recording.setSettings(configuration.getSettings());
|
|
129 |
}
|
|
130 |
|
|
131 |
/**
|
|
132 |
* Enables the event with the specified name.
|
|
133 |
* <p>
|
|
134 |
* If multiple events have the same name (for example, the same class is
|
|
135 |
* loaded in different class loaders), then all events that match the name
|
|
136 |
* are enabled. To enable a specific class, use the {@link #enable(Class)}
|
|
137 |
* method or a {@code String} representation of the event type ID.
|
|
138 |
*
|
|
139 |
* @param name the settings for the event, not {@code null}
|
|
140 |
*
|
|
141 |
* @return an event setting for further configuration, not {@code null}
|
|
142 |
*
|
|
143 |
* @see EventType
|
|
144 |
*/
|
|
145 |
public EventSettings enable(String name) {
|
|
146 |
return recording.enable(name);
|
|
147 |
}
|
|
148 |
|
|
149 |
/**
|
|
150 |
* Replaces all settings for this recording stream.
|
|
151 |
* <p>
|
|
152 |
* The following example records 20 seconds using the "default" configuration
|
|
153 |
* and then changes settings to the "profile" configuration.
|
|
154 |
*
|
|
155 |
* <pre>
|
|
156 |
* <code>
|
|
157 |
* Configuration defaultConfiguration = Configuration.getConfiguration("default");
|
|
158 |
* Configuration profileConfiguration = Configuration.getConfiguration("profile");
|
|
159 |
* try (var rs = new RecordingStream(defaultConfiguration) {
|
|
160 |
* rs.onEvent(System.out::println);
|
|
161 |
* rs.startAsync();
|
|
162 |
* Thread.sleep(20_000);
|
|
163 |
* rs.setSettings(profileConfiguration.getSettings());
|
|
164 |
* Thread.sleep(20_000);
|
|
165 |
* }
|
|
166 |
* </code>
|
|
167 |
* </pre>
|
|
168 |
*
|
|
169 |
* @param settings the settings to set, not {@code null}
|
|
170 |
*
|
|
171 |
* @see Recording#setSettings(Map)
|
|
172 |
*/
|
|
173 |
public void setSettings(Map<String, String> settings) {
|
|
174 |
recording.setSettings(settings);
|
|
175 |
};
|
|
176 |
|
|
177 |
/**
|
|
178 |
* Enables event.
|
|
179 |
*
|
|
180 |
* @param eventClass the event to enable, not {@code null}
|
|
181 |
*
|
|
182 |
* @throws IllegalArgumentException if {@code eventClass} is an abstract
|
|
183 |
* class or not a subclass of {@link Event}
|
|
184 |
*
|
|
185 |
* @return an event setting for further configuration, not {@code null}
|
|
186 |
*/
|
|
187 |
public EventSettings enable(Class<? extends Event> eventClass) {
|
|
188 |
return recording.enable(eventClass);
|
|
189 |
}
|
|
190 |
|
|
191 |
/**
|
|
192 |
* Disables event with the specified name.
|
|
193 |
* <p>
|
|
194 |
* If multiple events with same name (for example, the same class is loaded
|
|
195 |
* in different class loaders), then all events that match the name are
|
|
196 |
* disabled. To disable a specific class, use the {@link #disable(Class)}
|
|
197 |
* method or a {@code String} representation of the event type ID.
|
|
198 |
*
|
|
199 |
* @param name the settings for the event, not {@code null}
|
|
200 |
*
|
|
201 |
* @return an event setting for further configuration, not {@code null}
|
|
202 |
*
|
|
203 |
*/
|
|
204 |
public EventSettings disable(String name) {
|
|
205 |
return recording.disable(name);
|
|
206 |
}
|
|
207 |
|
|
208 |
/**
|
|
209 |
* Disables event.
|
|
210 |
*
|
|
211 |
* @param eventClass the event to enable, not {@code null}
|
|
212 |
*
|
|
213 |
* @throws IllegalArgumentException if {@code eventClass} is an abstract
|
|
214 |
* class or not a subclass of {@link Event}
|
|
215 |
*
|
|
216 |
* @return an event setting for further configuration, not {@code null}
|
|
217 |
*
|
|
218 |
*/
|
|
219 |
public EventSettings disable(Class<? extends Event> eventClass) {
|
|
220 |
return recording.disable(eventClass);
|
|
221 |
}
|
|
222 |
|
|
223 |
/**
|
|
224 |
* Determines how far back data is kept for the stream.
|
|
225 |
* <p>
|
|
226 |
* To control the amount of recording data stored on disk, the maximum
|
|
227 |
* length of time to retain the data can be specified. Data stored on disk
|
|
228 |
* that is older than the specified length of time is removed by the Java
|
|
229 |
* Virtual Machine (JVM).
|
|
230 |
* <p>
|
|
231 |
* If neither maximum limit or the maximum age is set, the size of the
|
|
232 |
* recording may grow indefinitely if events are on
|
|
233 |
*
|
|
234 |
* @param maxAge the length of time that data is kept, or {@code null} if
|
|
235 |
* infinite
|
|
236 |
*
|
|
237 |
* @throws IllegalArgumentException if {@code maxAge} is negative
|
|
238 |
*
|
|
239 |
* @throws IllegalStateException if the recording is in the {@code CLOSED}
|
|
240 |
* state
|
|
241 |
*/
|
|
242 |
public void setMaxAge(Duration maxAge) {
|
|
243 |
recording.setMaxAge(maxAge);
|
|
244 |
}
|
|
245 |
|
|
246 |
/**
|
|
247 |
* Determines how much data is kept for the stream.
|
|
248 |
* <p>
|
|
249 |
* To control the amount of recording data that is stored on disk, the
|
|
250 |
* maximum amount of data to retain can be specified. When the maximum limit
|
|
251 |
* is exceeded, the Java Virtual Machine (JVM) removes the oldest chunk to
|
|
252 |
* make room for a more recent chunk.
|
|
253 |
* <p>
|
|
254 |
* If neither maximum limit or the maximum age is set, the size of the
|
|
255 |
* recording may grow indefinitely.
|
|
256 |
* <p>
|
|
257 |
* The size is measured in bytes.
|
|
258 |
*
|
|
259 |
* @param maxSize the amount of data to retain, {@code 0} if infinite
|
|
260 |
*
|
|
261 |
* @throws IllegalArgumentException if {@code maxSize} is negative
|
|
262 |
*
|
|
263 |
* @throws IllegalStateException if the recording is in {@code CLOSED} state
|
|
264 |
*/
|
|
265 |
public void setMaxSize(long maxSize) {
|
|
266 |
recording.setMaxSize(maxSize);
|
|
267 |
}
|
|
268 |
|
|
269 |
/**
|
|
270 |
* Determines how often events are made available for streaming.
|
|
271 |
*
|
|
272 |
* @param interval the interval at which events are made available to the
|
|
273 |
* stream, no {@code null}
|
|
274 |
*
|
|
275 |
* @throws IllegalArgumentException if {@code interval} is negative
|
|
276 |
*
|
|
277 |
* @throws IllegalStateException if the stream is closed
|
|
278 |
*/
|
|
279 |
public void setFlushInterval(Duration interval) {
|
|
280 |
recording.setFlushInterval(interval);
|
|
281 |
}
|
|
282 |
|
|
283 |
@Override
|
|
284 |
public void setReuse(boolean reuse) {
|
|
285 |
directoryStream.setReuse(reuse);
|
|
286 |
}
|
|
287 |
|
|
288 |
@Override
|
|
289 |
public void setOrdered(boolean ordered) {
|
|
290 |
directoryStream.setOrdered(ordered);
|
|
291 |
}
|
|
292 |
|
|
293 |
@Override
|
|
294 |
public void setStartTime(Instant startTime) {
|
|
295 |
directoryStream.setStartTime(startTime);
|
|
296 |
}
|
|
297 |
|
|
298 |
@Override
|
|
299 |
public void setEndTime(Instant endTime) {
|
|
300 |
directoryStream.setEndTime(endTime);
|
|
301 |
}
|
|
302 |
|
|
303 |
@Override
|
|
304 |
public void onEvent(String eventName, Consumer<RecordedEvent> action) {
|
|
305 |
directoryStream.onEvent(eventName, action);
|
|
306 |
}
|
|
307 |
|
|
308 |
@Override
|
|
309 |
public void onEvent(Consumer<RecordedEvent> action) {
|
|
310 |
directoryStream.onEvent(action);
|
|
311 |
}
|
|
312 |
|
|
313 |
@Override
|
|
314 |
public void onFlush(Runnable action) {
|
|
315 |
directoryStream.onFlush(action);
|
|
316 |
}
|
|
317 |
|
|
318 |
@Override
|
|
319 |
public void onClose(Runnable action) {
|
|
320 |
directoryStream.onClose(action);
|
|
321 |
}
|
|
322 |
|
|
323 |
@Override
|
|
324 |
public void onError(Consumer<Throwable> action) {
|
|
325 |
directoryStream.onError(action);
|
|
326 |
}
|
|
327 |
|
|
328 |
@Override
|
|
329 |
public void close() {
|
|
330 |
recording.close();
|
|
331 |
directoryStream.close();
|
|
332 |
}
|
|
333 |
|
|
334 |
@Override
|
|
335 |
public boolean remove(Object action) {
|
|
336 |
return directoryStream.remove(action);
|
|
337 |
}
|
|
338 |
|
|
339 |
@Override
|
|
340 |
public void start() {
|
|
341 |
PlatformRecording pr = PrivateAccess.getInstance().getPlatformRecording(recording);
|
|
342 |
long startNanos = pr.start();
|
|
343 |
directoryStream.start(startNanos);
|
|
344 |
}
|
|
345 |
|
|
346 |
@Override
|
|
347 |
public void startAsync() {
|
|
348 |
PlatformRecording pr = PrivateAccess.getInstance().getPlatformRecording(recording);
|
|
349 |
long startNanos = pr.start();
|
|
350 |
directoryStream.startAsync(startNanos);
|
|
351 |
}
|
|
352 |
|
|
353 |
@Override
|
|
354 |
public void awaitTermination(Duration timeout) throws InterruptedException {
|
|
355 |
directoryStream.awaitTermination(timeout);
|
|
356 |
}
|
|
357 |
|
|
358 |
@Override
|
|
359 |
public void awaitTermination() throws InterruptedException {
|
|
360 |
directoryStream.awaitTermination();
|
|
361 |
}
|
|
362 |
}
|