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| 1 | +/* |
| 2 | + * Copyright (c) 2022, 2022, 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 | +package org.graalvm.visualvm.jfr.streaming; |
| 26 | + |
| 27 | +import java.io.IOException; |
| 28 | +import java.time.Duration; |
| 29 | +import java.util.function.Consumer; |
| 30 | +import jdk.jfr.EventSettings; |
| 31 | +import jdk.jfr.Period; |
| 32 | +import jdk.jfr.StackTrace; |
| 33 | +import jdk.jfr.Threshold; |
| 34 | +import jdk.jfr.consumer.RecordedEvent; |
| 35 | +import jdk.management.jfr.RemoteRecordingStream; |
| 36 | +import org.graalvm.visualvm.application.Application; |
| 37 | +import org.graalvm.visualvm.tools.jmx.JmxModel; |
| 38 | +import org.graalvm.visualvm.tools.jmx.JmxModelFactory; |
| 39 | + |
| 40 | +/** |
| 41 | + * |
| 42 | + * @author Tomas Hurka |
| 43 | + */ |
| 44 | +class JFRStream { |
| 45 | + |
| 46 | + private final RemoteRecordingStream rs; |
| 47 | + |
| 48 | + JFRStream(Application app) throws IOException { |
| 49 | + JmxModel jmx = JmxModelFactory.getJmxModelFor(app); |
| 50 | + rs = new RemoteRecordingStream(jmx.getMBeanServerConnection()); |
| 51 | + } |
| 52 | + |
| 53 | + void close() { |
| 54 | + rs.close(); |
| 55 | + } |
| 56 | + |
| 57 | + JFREventSettings enable(String eventName) { |
| 58 | + EventSettings s = rs.enable(eventName); |
| 59 | + return new JFREventSettings(eventName, s); |
| 60 | + } |
| 61 | + |
| 62 | + void onEvent(String eventName, Consumer<RecordedEvent> action) { |
| 63 | + rs.onEvent(eventName, action); |
| 64 | + } |
| 65 | + |
| 66 | + void startAsync() { |
| 67 | + rs.startAsync(); |
| 68 | + } |
| 69 | + |
| 70 | + class JFREventSettings { |
| 71 | + |
| 72 | + private final String eventName; |
| 73 | + private final EventSettings delegate; |
| 74 | + |
| 75 | + private JFREventSettings(String eventName, EventSettings s) { |
| 76 | + this.eventName = eventName; |
| 77 | + delegate = s; |
| 78 | + } |
| 79 | + |
| 80 | + JFREventSettings withStackTrace() { |
| 81 | + return with(StackTrace.NAME, "true"); |
| 82 | + } |
| 83 | + |
| 84 | + JFREventSettings withoutStackTrace() { |
| 85 | + return with(StackTrace.NAME, "false"); |
| 86 | + } |
| 87 | + |
| 88 | + JFREventSettings withoutThreshold() { |
| 89 | + return withThreshold(null); |
| 90 | + } |
| 91 | + |
| 92 | + JFREventSettings withPeriod(Duration duration) { |
| 93 | + return with(Period.NAME, getString(duration)); |
| 94 | + } |
| 95 | + |
| 96 | + JFREventSettings withThreshold(Duration duration) { |
| 97 | + return with(Threshold.NAME, getString(duration)); |
| 98 | + } |
| 99 | + |
| 100 | + JFREventSettings with(String name, String value) { |
| 101 | + delegate.with(eventName + "#" + name, value); |
| 102 | + return this; |
| 103 | + } |
| 104 | + |
| 105 | + private static String getString(Duration duration) { |
| 106 | + if (duration == null) { |
| 107 | + return "0 s"; |
| 108 | + } |
| 109 | + return duration.toNanos() + " ns"; |
| 110 | + } |
| 111 | + } |
| 112 | +} |
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