JDK 11 jdk.internal.jvmstat.jmod - Internal JVM Stat Module

JDK 11 jdk.internal.JVM Stat.jmod is the JMOD file for JDK 11 Internal Jvmstat module.

JDK 11 Internal JVM Stat module compiled class files are stored in \fyicenter\jdk-11.0.1\jmods\jdk.internal.jvmstat.jmod.

JDK 11 Internal JVM Stat module compiled class files are also linked and stored in the \fyicenter\jdk-11.0.1\lib\modules JImage file.

JDK 11 Internal JVM Stat module source code files are stored in \fyicenter\jdk-11.0.1\lib\src.zip\jdk.internal.jvmstat.

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

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sun/jvmstat/monitor/MonitoredVmUtil.java

/*
 * Copyright (c) 2004, 2011, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 *
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package sun.jvmstat.monitor;

/**
 * Utility class proving concenience methods for extracting various
 * information from an MonitoredVm object.
 *
 * @author Brian Doherty
 * @since 1.5
 */
public class MonitoredVmUtil {

    /**
     * Private constructor - prevent instantiation.
     */
    private MonitoredVmUtil() { }

    /**
     * Return the Java Virtual Machine Version.
     *
     * @param vm the target MonitoredVm
     * @return String - contains the version of the target JVM or the
     *                  the string "Unknown" if the version cannot be
     *                  determined.
     */
    public static String vmVersion(MonitoredVm vm) throws MonitorException {
        StringMonitor ver =
               (StringMonitor)vm.findByName("java.property.java.vm.version");
        return (ver == null) ? "Unknown" : ver.stringValue();
    }

    /**
     * Return the command line for the target Java application.
     *
     * @param vm the target MonitoredVm
     * @return String - contains the command line of the target Java
     *                  application or the string "Unknown" if the
     *                  command line cannot be determined.
     */
    public static String commandLine(MonitoredVm vm) throws MonitorException {
        StringMonitor cmd = (StringMonitor)vm.findByName("sun.rt.javaCommand");
        return (cmd == null) ? "Unknown" : cmd.stringValue();
    }

    /**
     * Return the arguments to the main class for the target Java application.
     * Returns the arguments to the main class. If the arguments can't be
     * found, the string "Unknown" is returned.
     *
     * @param vm the target MonitoredVm
     * @return String - contains the arguments to the main class for the
     *                  target Java application or the string "Unknown"
     *                  if the command line cannot be determined.
     */
    public static String mainArgs(MonitoredVm vm) throws MonitorException {
        String commandLine = commandLine(vm);

        int firstSpace = commandLine.indexOf(' ');
        if (firstSpace > 0) {
            return commandLine.substring(firstSpace + 1);
        } else if (commandLine.compareTo("Unknown") == 0) {
            return commandLine;
        } else {
            return null;
        }
    }

    /**
     * Return the main class for the target Java application.
     * Returns the main class or the name of the jar file if the application
     * was started with the <em>-jar</em> option.
     *
     * @param vm the target MonitoredVm
     * @param fullPath include the full path to Jar file, where applicable
     * @return String - contains the main class of the target Java
     *                  application or the string "Unknown" if the
     *                  command line cannot be determined.
     */
    public static String mainClass(MonitoredVm vm, boolean fullPath)
                         throws MonitorException {
        String cmdLine = commandLine(vm);
        int firstSpace = cmdLine.indexOf(' ');
        if (firstSpace > 0) {
            cmdLine = cmdLine.substring(0, firstSpace);
        }
        if (fullPath) {
            return cmdLine;
        }
        /*
         * Can't use File.separator() here because the separator for the target
         * jvm may be different than the separator for the monitoring jvm.
         * And we also strip embedded module e.g. "module/MainClass"
         */
        int lastSlash = cmdLine.lastIndexOf("/");
        int lastBackslash = cmdLine.lastIndexOf("\\");
        int lastSeparator = lastSlash > lastBackslash ? lastSlash : lastBackslash;
        if (lastSeparator > 0) {
            cmdLine = cmdLine.substring(lastSeparator + 1);
        }

        int lastPackageSeparator = cmdLine.lastIndexOf('.');
        if (lastPackageSeparator > 0) {
            String lastPart = cmdLine.substring(lastPackageSeparator + 1);
            /*
             * We could have a relative path "my.module" or
             * a module called "my.module" and a jar file called "my.jar" or
             * class named "jar" in package "my", e.g. "my.jar".
             * We can never be sure here, but we assume *.jar is a jar file
             */
            if (lastPart.equals("jar")) {
                return cmdLine; /* presumably a file name without path */
            }
            return lastPart; /* presumably a class name without package */
        }

        return cmdLine;
    }

    /**
     * Return the JVM arguments for the target Java application.
     *
     * @param vm the target MonitoredVm
     * @return String - contains the arguments passed to the JVM for the
     *                  target Java application or the string "Unknown"
     *                  if the command line cannot be determined.
     */
    public static String jvmArgs(MonitoredVm vm) throws MonitorException {
        StringMonitor jvmArgs = (StringMonitor)vm.findByName("java.rt.vmArgs");
        return (jvmArgs == null) ? "Unknown" : jvmArgs.stringValue();
    }

    /**
     * Return the JVM flags for the target Java application.
     *
     * @param vm the target MonitoredVm
     * @return String - contains the flags passed to the JVM for the
     *                  target Java application or the string "Unknown"
     *                  if the command line cannot be determined.
     */
    public static String jvmFlags(MonitoredVm vm) throws MonitorException {
        StringMonitor jvmFlags =
               (StringMonitor)vm.findByName("java.rt.vmFlags");
        return (jvmFlags == null) ? "Unknown" : jvmFlags.stringValue();
    }

    // Index of the sun.rt.jvmCapabilities counter
    private static int IS_ATTACHABLE = 0;
    private static int IS_KERNEL_VM  = 1;

    /**
     * Returns true if the VM supports attach-on-demand.
     *
     * @param vm the target MonitoredVm
     */
    public static boolean isAttachable(MonitoredVm vm) throws MonitorException {
        StringMonitor jvmCapabilities =
               (StringMonitor)vm.findByName("sun.rt.jvmCapabilities");
        if (jvmCapabilities == null) {
             return false;
        } else {
             return jvmCapabilities.stringValue().charAt(IS_ATTACHABLE) == '1';
        }
    }

}

sun/jvmstat/monitor/MonitoredVmUtil.java

 

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