Examples of java.lang.management.ClassLoadingMXBean

java.lang.management.ClassLoadingMXBean
The management interface for the class loading system of the Java virtual machine.
A Java virtual machine has a single instance of the implementation class of this interface. This instance implementing this interface is an MXBean that can be obtained by calling the {@link ManagementFactory#getClassLoadingMXBean} method orfrom the {@link ManagementFactory#getPlatformMBeanServer platform MBeanServer} method.
The ObjectName for uniquely identifying the MXBean for the class loading system within an MBeanServer is:
{@link ManagementFactory#CLASS_LOADING_MXBEAN_NAME java.lang:type=ClassLoading}
@see JMX Specification. @see Ways to Access MXBeans @author Mandy Chung @version 1.12, 11/17/05 @since 1.5


        RuntimeMXBean runtime = ManagementFactory.getRuntimeMXBean();
        OperatingSystemMXBean os = ManagementFactory.getOperatingSystemMXBean();
        ThreadMXBean threads = ManagementFactory.getThreadMXBean();
        MemoryMXBean mem = ManagementFactory.getMemoryMXBean();
        ClassLoadingMXBean cl = ManagementFactory.getClassLoadingMXBean();


        //
        // print Karaf informations
        //
        maxNameLen = 25;
        System.out.println("Karaf");
        printValue("Karaf version", maxNameLen, System.getProperty("karaf.version"));
        printValue("Karaf home", maxNameLen, System.getProperty("karaf.home"));
        printValue("Karaf base", maxNameLen, System.getProperty("karaf.base"));
        printValue("OSGi Framework", maxNameLen, bundleContext.getBundle(0).getSymbolicName() + " - " +
                bundleContext.getBundle(0).getVersion());
        System.out.println();


        System.out.println("JVM");
        printValue("Java Virtual Machine", maxNameLen, runtime.getVmName() + " version " + runtime.getVmVersion());
        printValue("Version", maxNameLen, System.getProperty("java.version"));
        printValue("Vendor", maxNameLen, runtime.getVmVendor());
        printValue("Uptime", maxNameLen, printDuration(runtime.getUptime()));
        try {
            printValue("Process CPU time", maxNameLen, printDuration(getSunOsValueAsLong(os, "getProcessCpuTime") / 1000000));
        } catch (Throwable t) {
        }
        printValue("Total compile time", maxNameLen, printDuration(ManagementFactory.getCompilationMXBean().getTotalCompilationTime()));


        System.out.println("Threads");
        printValue("Live threads", maxNameLen, Integer.toString(threads.getThreadCount()));
        printValue("Daemon threads", maxNameLen, Integer.toString(threads.getDaemonThreadCount()));
        printValue("Peak", maxNameLen, Integer.toString(threads.getPeakThreadCount()));
        printValue("Total started", maxNameLen, Long.toString(threads.getTotalStartedThreadCount()));


        System.out.println("Memory");
        printValue("Current heap size", maxNameLen, printSizeInKb(mem.getHeapMemoryUsage().getUsed()));
        printValue("Maximum heap size", maxNameLen, printSizeInKb(mem.getHeapMemoryUsage().getMax()));
        printValue("Committed heap size", maxNameLen, printSizeInKb(mem.getHeapMemoryUsage().getCommitted()));
        printValue("Pending objects", maxNameLen, Integer.toString(mem.getObjectPendingFinalizationCount()));
        for (GarbageCollectorMXBean gc : ManagementFactory.getGarbageCollectorMXBeans()) {
            String val = "Name = '" + gc.getName() + "', Collections = " + gc.getCollectionCount() + ", Time = " + printDuration(gc.getCollectionTime());
            printValue("Garbage collector", maxNameLen, val);
        }


        System.out.println("Classes");
        printValue("Current classes loaded", maxNameLen, printLong(cl.getLoadedClassCount()));
        printValue("Total classes loaded", maxNameLen, printLong(cl.getTotalLoadedClassCount()));
        printValue("Total classes unloaded", maxNameLen, printLong(cl.getUnloadedClassCount()));


        System.out.println("Operating system");
        printValue("Name", maxNameLen, os.getName() + " version " + os.getVersion());
        printValue("Architecture", maxNameLen, os.getArch());
        printValue("Processors", maxNameLen, Integer.toString(os.getAvailableProcessors()));

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        RuntimeMXBean runtime = ManagementFactory.getRuntimeMXBean();
        OperatingSystemMXBean os = ManagementFactory.getOperatingSystemMXBean();
        ThreadMXBean threads = ManagementFactory.getThreadMXBean();
        MemoryMXBean mem = ManagementFactory.getMemoryMXBean();
        ClassLoadingMXBean cl = ManagementFactory.getClassLoadingMXBean();
        io = context.getIo();


        //
        // print ServiceMix informations
        //
        maxNameLen = 25;
        io.out.println("ServiceMix");
        printValue("ServiceMix home", maxNameLen, System.getProperty("servicemix.home"));
        printValue("ServiceMix base", maxNameLen, System.getProperty("servicemix.base"));
        printValue("ServiceMix Kernel version", maxNameLen, branding.getParent().getVersion());


        if (branding.getApplicationName() != null && branding.getApplicationVersion() != null) {
            printValue(branding.getApplicationName() + " version", maxNameLen, branding.getApplicationVersion());
        }
        io.out.println();


        io.out.println("JVM");
        printValue("Java Virtual Machine", maxNameLen, runtime.getVmName() + " version " + runtime.getVmVersion());
        printValue("Vendor", maxNameLen, runtime.getVmVendor());
        printValue("Uptime", maxNameLen, printDuration(runtime.getUptime()));
        try {
            printValue("Process CPU time", maxNameLen, printDuration(getSunOsValueAsLong(os, "getProcessCpuTime") / 1000000));
        } catch (Throwable t) {}
        printValue("Total compile time", maxNameLen, printDuration(ManagementFactory.getCompilationMXBean().getTotalCompilationTime()));


        io.out.println("Threads");
        printValue("Live threads", maxNameLen, Integer.toString(threads.getThreadCount()));
        printValue("Daemon threads", maxNameLen, Integer.toString(threads.getDaemonThreadCount()));
        printValue("Peak", maxNameLen, Integer.toString(threads.getPeakThreadCount()));
        printValue("Total started", maxNameLen, Long.toString(threads.getTotalStartedThreadCount()));


        io.out.println("Memory");
        printValue("Current heap size", maxNameLen, printSizeInKb(mem.getHeapMemoryUsage().getUsed()));
        printValue("Maximum heap size", maxNameLen, printSizeInKb(mem.getHeapMemoryUsage().getMax()));
        printValue("Committed heap size", maxNameLen, printSizeInKb(mem.getHeapMemoryUsage().getCommitted()));
        printValue("Pending objects", maxNameLen, Integer.toString(mem.getObjectPendingFinalizationCount()));
        for (GarbageCollectorMXBean gc : ManagementFactory.getGarbageCollectorMXBeans()) {
            String val = "Name = '" + gc.getName() + "', Collections = " + gc.getCollectionCount() + ", Time = " + printDuration(gc.getCollectionTime());
            printValue("Garbage collector", maxNameLen, val);
        }


        io.out.println("Classes");
        printValue("Current classes loaded", maxNameLen, printLong(cl.getLoadedClassCount()));
        printValue("Total classes loaded", maxNameLen, printLong(cl.getTotalLoadedClassCount()));
        printValue("Total classes unloaded", maxNameLen, printLong(cl.getUnloadedClassCount()));


        io.out.println("Operating system");
        printValue("Name", maxNameLen, os.getName() + " version " + os.getVersion());
        printValue("Architecture", maxNameLen, os.getArch());
        printValue("Processors", maxNameLen, Integer.toString(os.getAvailableProcessors()));

View Full Code Here

    * @param mof - the ManagedObjectFactory to use
    * @return
    */
   public static ManagedObject getClassLoadingMO(ManagedObjectFactory mof)
   {
      ClassLoadingMXBean mbean = ManagementFactory.getClassLoadingMXBean();
      ManagedObject mo = getMO(mbean, ClassLoadingMXBeanMO.class, mof);
      return mo;
   }

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    /*
     * Test method for
     * 'java.lang.management.ManagementFactory.getClassLoadingMXBean()'
     */
    public void testGetClassLoadingMXBean() {
        ClassLoadingMXBean mb = ManagementFactory.getClassLoadingMXBean();
        assertNotNull(mb);


        // Verify that there is only instance of the class loading bean
        ClassLoadingMXBean mb2 = ManagementFactory.getClassLoadingMXBean();
        assertNotNull(mb2);
        assertSame(mb, mb2);
    }

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     * 'java.lang.management.ManagementFactory.newPlatformMXBeanProxy(MBeanServerConnection,
     * String, Class<T>) <T>'
     */
    public void testNewPlatformMXBeanProxy_ClassLoadingMXBean()
            throws Exception {
        ClassLoadingMXBean proxy = ManagementFactory.newPlatformMXBeanProxy(
                ManagementFactory.getPlatformMBeanServer(),
                "java.lang:type=ClassLoading", ClassLoadingMXBean.class);
        assertNotNull(proxy);
        ClassLoadingMXBean classLoadingMXBean = ManagementFactory
                .getClassLoadingMXBean();
        assertEquals(proxy.getLoadedClassCount(), classLoadingMXBean
                .getLoadedClassCount());
        assertEquals(proxy.getTotalLoadedClassCount(), classLoadingMXBean
                .getTotalLoadedClassCount());
        assertEquals(proxy.getUnloadedClassCount(), classLoadingMXBean
                .getUnloadedClassCount());
        assertEquals(proxy.isVerbose(), classLoadingMXBean.isVerbose());


        boolean initialVal = proxy.isVerbose();
        proxy.setVerbose(!initialVal);
        assertTrue(proxy.isVerbose() != initialVal);
        proxy.setVerbose(initialVal);

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    //http://docs.oracle.com/javase/7/docs/jre/api/management/extension/com/sun/management/OperatingSystemMXBean.html
    public SystemResourcesInfo createRessourcenInfo(){
      OperatingSystemMXBean operatingSystemMXBean= ManagementFactory.getOperatingSystemMXBean();
      MemoryMXBean memoryMXBean = ManagementFactory.getMemoryMXBean();
      java.lang.management.ThreadMXBean threadMXBean = ManagementFactory.getThreadMXBean();
      ClassLoadingMXBean classLoadingMXBean  = ManagementFactory.getClassLoadingMXBean();
      
      double processCpuLoad=0;
      double systemCpuLoad=0;
      long freePhysicalMemorySize=0;
      if (method_getProcessCpuLoad!=null && method_getSystemCpuLoad!=null && method_getFreePhysicalMemorySize!=null){
        try {
          processCpuLoad = (Double)method_getProcessCpuLoad.invoke(operatingSystemMXBean);
          systemCpuLoad = (Double)method_getSystemCpuLoad.invoke(operatingSystemMXBean);
          freePhysicalMemorySize = (Long)method_getFreePhysicalMemorySize.invoke(operatingSystemMXBean);
        } catch (Exception e) {
          //workaround to support legacy java versions the 
          //Exception means no support
        }
      }
      return new SystemResourcesInfo(new Date(),
          boundValue(systemCpuLoad),
          freePhysicalMemorySize,
          boundValue(processCpuLoad),
          memoryMXBean.getHeapMemoryUsage().getUsed(),
          threadMXBean.getThreadCount(),
          classLoadingMXBean.getTotalLoadedClassCount());
    }

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          EurekaJStringLogger.appendToBuffer("MemoryPool: " + agentName + " " + memPool.getName().replaceAll(" ", "_") + " "
              + memPool.getUsage().getMax() + " " + memPool.getUsage().getUsed() + " " + memPool.getUsage().getCommitted() + " "
              + memPool.getUsage().getInit() + " " + millis);
        }


        ClassLoadingMXBean classLoadingBean = ManagementFactory.getClassLoadingMXBean();
        EurekaJStringLogger.appendToBuffer("Classloader: " + agentName + " " + classLoadingBean.getTotalLoadedClassCount() + " "
            + classLoadingBean.getLoadedClassCount() + " " + classLoadingBean.getUnloadedClassCount());
        
        List<GarbageCollectorMXBean> cgBeans = ManagementFactory.getGarbageCollectorMXBeans();
        for (GarbageCollectorMXBean cgBean : cgBeans) {
          System.out.println("CarbageCollection: " + cgBean.getName() + " " + cgBean.getCollectionCount() + " " + cgBean.getCollectionTime());
          String[] memPoolNames = cgBean.getMemoryPoolNames();

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    private void createRuntimeProps(MemberStateImpl memberState) {
        Runtime runtime = Runtime.getRuntime();
        ThreadMXBean threadMxBean = ManagementFactory.getThreadMXBean();
        RuntimeMXBean runtimeMxBean = ManagementFactory.getRuntimeMXBean();
        ClassLoadingMXBean clMxBean = ManagementFactory.getClassLoadingMXBean();
        MemoryMXBean memoryMxBean = ManagementFactory.getMemoryMXBean();
        MemoryUsage heapMemory = memoryMxBean.getHeapMemoryUsage();
        MemoryUsage nonHeapMemory = memoryMxBean.getNonHeapMemoryUsage();
        Map<String, Long> map = new HashMap<String, Long>();
        map.put("runtime.availableProcessors", Integer.valueOf(runtime.availableProcessors()).longValue());
        map.put("date.startTime", runtimeMxBean.getStartTime());
        map.put("seconds.upTime", runtimeMxBean.getUptime());
        map.put("memory.maxMemory", runtime.maxMemory());
        map.put("memory.freeMemory", runtime.freeMemory());
        map.put("memory.totalMemory", runtime.totalMemory());
        map.put("memory.heapMemoryMax", heapMemory.getMax());
        map.put("memory.heapMemoryUsed", heapMemory.getUsed());
        map.put("memory.nonHeapMemoryMax", nonHeapMemory.getMax());
        map.put("memory.nonHeapMemoryUsed", nonHeapMemory.getUsed());
        map.put("runtime.totalLoadedClassCount", clMxBean.getTotalLoadedClassCount());
        map.put("runtime.loadedClassCount", Integer.valueOf(clMxBean.getLoadedClassCount()).longValue());
        map.put("runtime.unloadedClassCount", clMxBean.getUnloadedClassCount());
        map.put("runtime.totalStartedThreadCount", threadMxBean.getTotalStartedThreadCount());
        map.put("runtime.threadCount", Integer.valueOf(threadMxBean.getThreadCount()).longValue());
        map.put("runtime.peakThreadCount", Integer.valueOf(threadMxBean.getPeakThreadCount()).longValue());
        map.put("runtime.daemonThreadCount", Integer.valueOf(threadMxBean.getDaemonThreadCount()).longValue());

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        RuntimeMXBean runtime = ManagementFactory.getRuntimeMXBean();
        OperatingSystemMXBean os = ManagementFactory.getOperatingSystemMXBean();
        ThreadMXBean threads = ManagementFactory.getThreadMXBean();
        MemoryMXBean mem = ManagementFactory.getMemoryMXBean();
        ClassLoadingMXBean cl = ManagementFactory.getClassLoadingMXBean();


        //
        // print Karaf informations
        //
        maxNameLen = 25;
        System.out.println("Karaf");
        printValue("Karaf home", maxNameLen, System.getProperty("karaf.home"));
        printValue("Karaf base", maxNameLen, System.getProperty("karaf.base"));
        printValue("OSGi Framework", maxNameLen, bundleContext.getBundle(0).getSymbolicName() + " - " +
            bundleContext.getBundle(0).getVersion());
        System.out.println();


        System.out.println("JVM");
        printValue("Java Virtual Machine", maxNameLen, runtime.getVmName() + " version " + runtime.getVmVersion());
        printValue("Version", maxNameLen, System.getProperty("java.version"));
        printValue("Vendor", maxNameLen, runtime.getVmVendor());
        printValue("Uptime", maxNameLen, printDuration(runtime.getUptime()));
        try {
            printValue("Process CPU time", maxNameLen, printDuration(getSunOsValueAsLong(os, "getProcessCpuTime") / 1000000));
        } catch (Throwable t) {}
        printValue("Total compile time", maxNameLen, printDuration(ManagementFactory.getCompilationMXBean().getTotalCompilationTime()));


        System.out.println("Threads");
        printValue("Live threads", maxNameLen, Integer.toString(threads.getThreadCount()));
        printValue("Daemon threads", maxNameLen, Integer.toString(threads.getDaemonThreadCount()));
        printValue("Peak", maxNameLen, Integer.toString(threads.getPeakThreadCount()));
        printValue("Total started", maxNameLen, Long.toString(threads.getTotalStartedThreadCount()));


        System.out.println("Memory");
        printValue("Current heap size", maxNameLen, printSizeInKb(mem.getHeapMemoryUsage().getUsed()));
        printValue("Maximum heap size", maxNameLen, printSizeInKb(mem.getHeapMemoryUsage().getMax()));
        printValue("Committed heap size", maxNameLen, printSizeInKb(mem.getHeapMemoryUsage().getCommitted()));
        printValue("Pending objects", maxNameLen, Integer.toString(mem.getObjectPendingFinalizationCount()));
        for (GarbageCollectorMXBean gc : ManagementFactory.getGarbageCollectorMXBeans()) {
            String val = "Name = '" + gc.getName() + "', Collections = " + gc.getCollectionCount() + ", Time = " + printDuration(gc.getCollectionTime());
            printValue("Garbage collector", maxNameLen, val);
        }


        System.out.println("Classes");
        printValue("Current classes loaded", maxNameLen, printLong(cl.getLoadedClassCount()));
        printValue("Total classes loaded", maxNameLen, printLong(cl.getTotalLoadedClassCount()));
        printValue("Total classes unloaded", maxNameLen, printLong(cl.getUnloadedClassCount()));


        System.out.println("Operating system");
        printValue("Name", maxNameLen, os.getName() + " version " + os.getVersion());
        printValue("Architecture", maxNameLen, os.getArch());
        printValue("Processors", maxNameLen, Integer.toString(os.getAvailableProcessors()));

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        System.out.println("FAIL");
        System.exit(1);
    }


    public static void main(String[] args) throws Exception {
        ClassLoadingMXBean classMXBean = ManagementFactory
                .getClassLoadingMXBean();
        if (!classMXBean.isVerbose()) {
            fail();
        }
        Class.forName(args[0]);
        classMXBean.setVerbose(false);
        if (classMXBean.isVerbose()) {
            fail();
        }
        System.out.println(args[1]);
        Class.forName(args[2]);
        classMXBean.setVerbose(true);
        if (!classMXBean.isVerbose()) {
            fail();
        }
        System.out.println(args[3]);
        System.exit(77);
    }

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