author | chegar |
Thu, 17 Oct 2019 20:54:25 +0100 | |
branch | datagramsocketimpl-branch |
changeset 58679 | 9c3209ff7550 |
parent 58678 | 9cf78a70fa4f |
parent 58480 | 8ca46e186a63 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2016, 2018, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. Oracle designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Oracle in the LICENSE file that accompanied this code. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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package jdk.jfr.internal.management; |
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import java.io.IOException; |
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import java.nio.file.Paths; |
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import java.time.Duration; |
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import java.util.ArrayList; |
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import java.util.Collections; |
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import java.util.List; |
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import jdk.jfr.EventType; |
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import jdk.jfr.Recording; |
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import jdk.jfr.internal.JVMSupport; |
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import jdk.jfr.internal.LogLevel; |
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import jdk.jfr.internal.LogTag; |
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import jdk.jfr.internal.Logger; |
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import jdk.jfr.internal.MetadataRepository; |
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import jdk.jfr.internal.PlatformRecording; |
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import jdk.jfr.internal.PrivateAccess; |
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import jdk.jfr.internal.Utils; |
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import jdk.jfr.internal.WriteableUserPath; |
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import jdk.jfr.internal.instrument.JDKEvents; |
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/** |
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* The management API in module jdk.management.jfr should be built on top of the |
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* public API in jdk.jfr. Before putting more functionality here, consider if it |
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* should not be part of the public API, and if not, please provide motivation |
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* |
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*/ |
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public final class ManagementSupport { |
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// Purpose of this method is to expose the event types to the |
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// FlightRecorderMXBean without instantiating Flight Recorder. |
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// |
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// This allows: |
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// |
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// 1) discoverability, so event settings can be exposed without the need to |
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// create a new Recording in FlightrecorderMXBean. |
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// |
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// 2) a graphical JMX client to list all attributes to the user, without |
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// loading JFR memory buffers. This is especially important when there is |
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// no intent to use Flight Recorder. |
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// |
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// An alternative design would be to make FlightRecorder#getEventTypes |
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// static, but it would the make the API look strange |
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// |
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public static List<EventType> getEventTypes() { |
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// would normally be checked when a Flight Recorder instance is created |
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Utils.checkAccessFlightRecorder(); |
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if (JVMSupport.isNotAvailable()) { |
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return new ArrayList<>(); |
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} |
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JDKEvents.initialize(); // make sure JDK events are available |
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return Collections.unmodifiableList(MetadataRepository.getInstance().getRegisteredEventTypes()); |
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} |
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// Reuse internal code for parsing a timespan |
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public static long parseTimespan(String s) { |
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return Utils.parseTimespan(s); |
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} |
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// Reuse internal code for formatting settings |
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public static final String formatTimespan(Duration dValue, String separation) { |
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return Utils.formatTimespan(dValue, separation); |
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} |
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// Reuse internal logging mechanism |
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public static void logError(String message) { |
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Logger.log(LogTag.JFR, LogLevel.ERROR, message); |
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} |
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// Get the textual representation when the destination was set, which |
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// requires access to jdk.jfr.internal.PlatformRecording |
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public static String getDestinationOriginalText(Recording recording) { |
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PlatformRecording pr = PrivateAccess.getInstance().getPlatformRecording(recording); |
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WriteableUserPath wup = pr.getDestination(); |
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return wup == null ? null : wup.getOriginalText(); |
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} |
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public static void checkSetDestination(Recording recording, String destination) throws IOException{ |
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PlatformRecording pr = PrivateAccess.getInstance().getPlatformRecording(recording); |
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if(destination != null){ |
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WriteableUserPath wup = new WriteableUserPath(Paths.get(destination)); |
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pr.checkSetDestination(wup); |
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} |
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} |
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} |