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.

✍: FYIcenter

sun/jvmstat/perfdata/monitor/protocol/file/PerfDataBuffer.java

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

import sun.jvmstat.monitor.*;
import sun.jvmstat.perfdata.monitor.*;
import java.io.*;
import java.net.URI;
import java.nio.ByteBuffer;
import java.nio.channels.FileChannel;

/**
 * The concrete PerfDataBuffer implementation for the <em>file:</em>
 * protocol for the HotSpot PerfData monitoring implemetation.
 * <p>
 * This class is responsible for acquiring access to the instrumentation
 * buffer stored in a file referenced by a file URI.
 *
 * @author Brian Doherty
 * @since 1.5
 */
public class PerfDataBuffer extends AbstractPerfDataBuffer {

    /**
     * Create a PerfDataBuffer instance for accessing the specified
     * instrumentation buffer.
     *
     * @param vmid the <em>file:</em> URI to the instrumentation buffer file
     *
     * @throws MonitorException
     */
    public PerfDataBuffer(VmIdentifier vmid) throws MonitorException {
        File f = new File(vmid.getURI());
        String mode = vmid.getMode();

        try {
            FileChannel fc = new RandomAccessFile(f, mode).getChannel();
            ByteBuffer bb = null;

            if (mode.compareTo("r") == 0) {
                bb = fc.map(FileChannel.MapMode.READ_ONLY, 0L, (int)fc.size());
            } else if (mode.compareTo("rw") == 0) {
                bb = fc.map(FileChannel.MapMode.READ_WRITE, 0L, (int)fc.size());
            } else {
                throw new IllegalArgumentException("Invalid mode: " + mode);
            }

            fc.close();               // doesn't need to remain open

            createPerfDataBuffer(bb, 0);
        } catch (FileNotFoundException e) {
            throw new MonitorException("Could not find " + vmid.toString());
        } catch (IOException e) {
            throw new MonitorException("Could not read " + vmid.toString());
        }
    }
}

sun/jvmstat/perfdata/monitor/protocol/file/PerfDataBuffer.java

 

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