JDK 11 jdk.jconsole.jmod - JConsole Tool

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

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

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

JDK 11 JConsole tool source code files are stored in \fyicenter\jdk-11.0.1\lib\src.zip\jdk.jconsole.

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

✍: FYIcenter

sun/tools/jconsole/MemoryPoolProxy.java

/*
 * Copyright (c) 2004, 2012, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 */

package sun.tools.jconsole;

import javax.management.ObjectName;
import java.lang.management.MemoryPoolMXBean;
import java.lang.management.MemoryUsage;
import com.sun.management.GarbageCollectorMXBean;
import com.sun.management.GcInfo;
import java.util.HashMap;
import java.util.Set;
import java.util.Map;

import static java.lang.management.ManagementFactory.*;

public class MemoryPoolProxy {
    private String poolName;
    private ProxyClient client;
    private MemoryPoolMXBean pool;
    private Map<ObjectName,Long> gcMBeans;
    private GcInfo lastGcInfo;

    public MemoryPoolProxy(ProxyClient client, ObjectName poolName) throws java.io.IOException {
        this.client = client;
        this.pool = client.getMXBean(poolName, MemoryPoolMXBean.class);
        this.poolName = this.pool.getName();
        this.gcMBeans = new HashMap<ObjectName,Long>();
        this.lastGcInfo = null;

        String[] mgrNames = pool.getMemoryManagerNames();
        for (String name : mgrNames) {
            try {
                ObjectName mbeanName = new ObjectName(GARBAGE_COLLECTOR_MXBEAN_DOMAIN_TYPE +
                                                      ",name=" + name);
                if (client.isRegistered(mbeanName)) {
                    gcMBeans.put(mbeanName, 0L);
                }
            } catch (Exception e) {
                assert false;
            }

        }
    }

    public boolean isCollectedMemoryPool() {
        return (gcMBeans.size() != 0);
    }

    public MemoryPoolStat getStat() throws java.io.IOException {
        long usageThreshold = (pool.isUsageThresholdSupported()
                                  ? pool.getUsageThreshold()
                                  : -1);
        long collectThreshold = (pool.isCollectionUsageThresholdSupported()
                                  ? pool.getCollectionUsageThreshold()
                                  : -1);
        long lastGcStartTime = 0;
        long lastGcEndTime = 0;
        MemoryUsage beforeGcUsage = null;
        MemoryUsage afterGcUsage = null;
        long gcId = 0;
        if (lastGcInfo != null) {
            gcId = lastGcInfo.getId();
            lastGcStartTime = lastGcInfo.getStartTime();
            lastGcEndTime = lastGcInfo.getEndTime();
            beforeGcUsage = lastGcInfo.getMemoryUsageBeforeGc().get(poolName);
            afterGcUsage = lastGcInfo.getMemoryUsageAfterGc().get(poolName);
        }

        Set<Map.Entry<ObjectName,Long>> set = gcMBeans.entrySet();
        for (Map.Entry<ObjectName,Long> e : set) {
            GarbageCollectorMXBean gc =
                client.getMXBean(e.getKey(),
                                 com.sun.management.GarbageCollectorMXBean.class);
            Long gcCount = e.getValue();
            Long newCount = gc.getCollectionCount();
            if (newCount > gcCount) {
                gcMBeans.put(e.getKey(), newCount);
                lastGcInfo = gc.getLastGcInfo();
                if (lastGcInfo.getEndTime() > lastGcEndTime) {
                    gcId = lastGcInfo.getId();
                    lastGcStartTime = lastGcInfo.getStartTime();
                    lastGcEndTime = lastGcInfo.getEndTime();
                    beforeGcUsage = lastGcInfo.getMemoryUsageBeforeGc().get(poolName);
                    afterGcUsage = lastGcInfo.getMemoryUsageAfterGc().get(poolName);
                    assert(beforeGcUsage != null);
                    assert(afterGcUsage != null);
                }
            }
        }

        MemoryUsage usage = pool.getUsage();
        return new MemoryPoolStat(poolName,
                                  usageThreshold,
                                  usage,
                                  gcId,
                                  lastGcStartTime,
                                  lastGcEndTime,
                                  collectThreshold,
                                  beforeGcUsage,
                                  afterGcUsage);
    }
}

sun/tools/jconsole/MemoryPoolProxy.java

 

JDK 11 jdk.jdeps.jmod - JDeps Tool

JDK 11 jdk.jcmd.jmod - JCmd Tool

Download and Use JDK 11

⇑⇑ FAQ for JDK (Java Development Kit)

2020-07-07, 4878👍, 0💬