JDK 11 jdk.jcmd.jmod - JCmd Tool

JDK 11 jdk.jcmd.jmod is the JMOD file for JDK 11 JCmd tool, which can be invoked by the "jcmd" command.

JDK 11 JCmd tool compiled class files are stored in \fyicenter\jdk-11.0.1\jmods\jdk.jcmd.jmod.

JDK 11 JCmd tool compiled class files are also linked and stored in the \fyicenter\jdk-11.0.1\lib\modules JImage file.

JDK 11 JCmd source code files are stored in \fyicenter\jdk-11.0.1\lib\src.zip\jdk.jcmd.

You can click and view the content of each source code file in the list below.

✍: FYIcenter

sun/tools/jstat/Jstat.java

/*
 * Copyright (c) 2004, 2010, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 *
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 */

package sun.tools.jstat;

import java.util.*;
import sun.jvmstat.monitor.*;
import sun.jvmstat.monitor.event.*;

/**
 * Application to output jvmstat statistics exported by a target Java
 * Virtual Machine. The jstat tool gets its inspiration from the suite
 * of 'stat' tools, such as vmstat, iostat, mpstat, etc., available in
 * various UNIX platforms.
 *
 * @author Brian Doherty
 * @since 1.5
 */
public class Jstat {
    private static Arguments arguments;

    public static void main(String[] args) {
        try {
            arguments = new Arguments(args);
        } catch (IllegalArgumentException e) {
            System.err.println(e.getMessage());
            Arguments.printUsage(System.err);
            System.exit(1);
        }

        if (arguments.isHelp()) {
            Arguments.printUsage(System.out);
            System.exit(0);
        }

        if (arguments.isOptions()) {
            OptionLister ol = new OptionLister(arguments.optionsSources());
            ol.print(System.out);
            System.exit(0);
        }

        try {
            if (arguments.isList()) {
                logNames();
            } else if (arguments.isSnap()) {
                logSnapShot();
            } else {
                logSamples();
            }
        } catch (MonitorException e) {
            e.printStackTrace();
            System.exit(1);
        }
        System.exit(0);
    }

    static void logNames() throws MonitorException {
        VmIdentifier vmId = arguments.vmId();
        int interval = arguments.sampleInterval();
        MonitoredHost monitoredHost = MonitoredHost.getMonitoredHost(vmId);
        MonitoredVm monitoredVm = monitoredHost.getMonitoredVm(vmId, interval);
        JStatLogger logger = new JStatLogger(monitoredVm);
        logger.printNames(arguments.counterNames(), arguments.comparator(),
                          arguments.showUnsupported(), System.out);
        monitoredHost.detach(monitoredVm);
    }

    static void logSnapShot() throws MonitorException {
        VmIdentifier vmId = arguments.vmId();
        int interval = arguments.sampleInterval();
        MonitoredHost monitoredHost = MonitoredHost.getMonitoredHost(vmId);
        MonitoredVm monitoredVm = monitoredHost.getMonitoredVm(vmId, interval);
        JStatLogger logger = new JStatLogger(monitoredVm);
        logger.printSnapShot(arguments.counterNames(), arguments.comparator(),
                             arguments.isVerbose(), arguments.showUnsupported(),
                             System.out);
        monitoredHost.detach(monitoredVm);
    }

    static void logSamples() throws MonitorException {
        final VmIdentifier vmId = arguments.vmId();
        int interval = arguments.sampleInterval();
        final MonitoredHost monitoredHost =
                MonitoredHost.getMonitoredHost(vmId);
        MonitoredVm monitoredVm = monitoredHost.getMonitoredVm(vmId, interval);
        final JStatLogger logger = new JStatLogger(monitoredVm);
        OutputFormatter formatter = null;

        if (arguments.isSpecialOption()) {
            OptionFormat format = arguments.optionFormat();
            formatter = new OptionOutputFormatter(monitoredVm, format);
        } else {
            List<Monitor> logged = monitoredVm.findByPattern(arguments.counterNames());
            Collections.sort(logged, arguments.comparator());
            List<Monitor> constants = new ArrayList<Monitor>();

            for (Iterator<Monitor> i = logged.iterator(); i.hasNext(); /* empty */) {
                Monitor m = i.next();
                if (!(m.isSupported() || arguments.showUnsupported())) {
                    i.remove();
                    continue;
                }
                if (m.getVariability() == Variability.CONSTANT) {
                    i.remove();
                    if (arguments.printConstants()) constants.add(m);
                } else if ((m.getUnits() == Units.STRING)
                        && !arguments.printStrings()) {
                    i.remove();
                }
            }

            if (!constants.isEmpty()) {
                logger.printList(constants, arguments.isVerbose(),
                                 arguments.showUnsupported(), System.out);
                if (!logged.isEmpty()) {
                    System.out.println();
                }
            }

            if (logged.isEmpty()) {
                monitoredHost.detach(monitoredVm);
                return;
            }

            formatter = new RawOutputFormatter(logged,
                                               arguments.printStrings());
        }

        // handle user termination requests by stopping sampling loops
        Runtime.getRuntime().addShutdownHook(new Thread() {
            public void run() {
                logger.stopLogging();
            }
        });

        // handle target termination events for targets other than ourself
        HostListener terminator = new HostListener() {
            public void vmStatusChanged(VmStatusChangeEvent ev) {
                Integer lvmid = vmId.getLocalVmId();
                if (ev.getTerminated().contains(lvmid)) {
                    logger.stopLogging();
                } else if (!ev.getActive().contains(lvmid)) {
                    logger.stopLogging();
                }
            }

            public void disconnected(HostEvent ev) {
                if (monitoredHost == ev.getMonitoredHost()) {
                    logger.stopLogging();
                }
            }
        };

        if (vmId.getLocalVmId() != 0) {
            monitoredHost.addHostListener(terminator);
        }

        logger.logSamples(formatter, arguments.headerRate(),
                          arguments.sampleInterval(), arguments.sampleCount(),
                          System.out);

        // detach from host events and from the monitored target jvm
        if (terminator != null) {
            monitoredHost.removeHostListener(terminator);
        }
        monitoredHost.detach(monitoredVm);
    }
}

sun/tools/jstat/Jstat.java

 

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2018-11-10, 2788👍, 0💬