java.lang.management.OperatingSystemMXBean#getSystemLoadAverage ( )源码实例Demo

public DasServerStatus getStatues() {
    DasServerStatus status = new DasServerStatus();
    status.online = true;
    status.avgResponse = totalCount.longValue() == 0 ? 0 : totalCost.longValue() / totalCount.longValue();
    status.avgThroughput = totalCount.longValue()/((System.currentTimeMillis() - serverStartTime)/1000);
    status.transactionCount = transServer.getCurrentCount();

    OperatingSystemMXBean osBean = ManagementFactory.getOperatingSystemMXBean();
    double load = osBean.getSystemLoadAverage();
    status.cpuRate = (int) Math.round(load);
    status.memRate = Math.round(100 - ((float)Runtime.getRuntime().freeMemory() / (float)Runtime.getRuntime().totalMemory()) * 100 );
    status.clientCount = clientConnection.get();

    //TODO
    //status.healthyPoint = ?;
    return status;
}
 

/**
 * Check how active the system is (CPU) or if not available, using system load average.
 * <p>
 * - On some OSes CPU usage information is not available, and system load average is used instead.
 * - On some OSes system load average is not available.
 *
 * @return 0.0 to 100.0 if CPU, or system load average, or -1 if nothing is available.
 */
public static double getAverageSystemLoad() {
    double averageUsage;

    OperatingSystemMXBean osBean = ManagementFactory.getOperatingSystemMXBean();
    if (osBean instanceof com.sun.management.OperatingSystemMXBean) {
        com.sun.management.OperatingSystemMXBean nativeOsBean = (com.sun.management.OperatingSystemMXBean) osBean;
        averageUsage = nativeOsBean.getSystemCpuLoad();
    } else {
        int availableProcessors = osBean.getAvailableProcessors();
        averageUsage = osBean.getSystemLoadAverage() / availableProcessors;
    }
    if (averageUsage < 0) {
        averageUsage = -1; // If unavailable, getSystemLoadAverage() returns -1
    }
    return averageUsage * 100.0;
}
 

private static void getSystemInfo( HopServerStatus serverStatus ) {
  OperatingSystemMXBean operatingSystemMXBean =
    java.lang.management.ManagementFactory.getOperatingSystemMXBean();
  ThreadMXBean threadMXBean = java.lang.management.ManagementFactory.getThreadMXBean();
  RuntimeMXBean runtimeMXBean = java.lang.management.ManagementFactory.getRuntimeMXBean();

  int cores = Runtime.getRuntime().availableProcessors();

  long freeMemory = Runtime.getRuntime().freeMemory();
  long totalMemory = Runtime.getRuntime().totalMemory();
  String osArch = operatingSystemMXBean.getArch();
  String osName = operatingSystemMXBean.getName();
  String osVersion = operatingSystemMXBean.getVersion();
  double loadAvg = operatingSystemMXBean.getSystemLoadAverage();

  int threadCount = threadMXBean.getThreadCount();
  long allThreadsCpuTime = 0L;

  long[] threadIds = threadMXBean.getAllThreadIds();
  for ( int i = 0; i < threadIds.length; i++ ) {
    allThreadsCpuTime += threadMXBean.getThreadCpuTime( threadIds[ i ] );
  }

  long uptime = runtimeMXBean.getUptime();

  serverStatus.setCpuCores( cores );
  serverStatus.setCpuProcessTime( allThreadsCpuTime );
  serverStatus.setUptime( uptime );
  serverStatus.setThreadCount( threadCount );
  serverStatus.setLoadAvg( loadAvg );
  serverStatus.setOsName( osName );
  serverStatus.setOsVersion( osVersion );
  serverStatus.setOsArchitecture( osArch );
  serverStatus.setMemoryFree( freeMemory );
  serverStatus.setMemoryTotal( totalMemory );
}
 

public ServerStatus() {
  OperatingSystemMXBean operatingSystemMXBean =
    java.lang.management.ManagementFactory.getOperatingSystemMXBean();
  ThreadMXBean threadMXBean = java.lang.management.ManagementFactory.getThreadMXBean();
  RuntimeMXBean runtimeMXBean = java.lang.management.ManagementFactory.getRuntimeMXBean();

  int cores = Runtime.getRuntime().availableProcessors();

  long freeMemory = Runtime.getRuntime().freeMemory();
  long totalMemory = Runtime.getRuntime().totalMemory();
  String osArch = operatingSystemMXBean.getArch();
  String osName = operatingSystemMXBean.getName();
  String osVersion = operatingSystemMXBean.getVersion();
  double loadAvg = operatingSystemMXBean.getSystemLoadAverage();

  int threadCount = threadMXBean.getThreadCount();
  long allThreadsCpuTime = 0L;

  long[] threadIds = threadMXBean.getAllThreadIds();
  for ( int i = 0; i < threadIds.length; i++ ) {
    allThreadsCpuTime += threadMXBean.getThreadCpuTime( threadIds[ i ] );
  }

  long uptime = runtimeMXBean.getUptime();

  setCpuCores( cores );
  setCpuProcessTime( allThreadsCpuTime );
  setUptime( uptime );
  setThreadCount( threadCount );
  setLoadAvg( loadAvg );
  setOsName( osName );
  setOsVersion( osVersion );
  setOsArchitecture( osArch );
  setMemoryFree( freeMemory );
  setMemoryTotal( totalMemory );
}
 

/**
 * Get CPU performance as a String, adjusted by cores
 * 
 * @return String. Returns a cpu percentage string
 */
public static String getCpuPerfAsString() {
	OperatingSystemMXBean mx = java.lang.management.ManagementFactory.getOperatingSystemMXBean();
	int cores = Runtime.getRuntime().availableProcessors();
	double d = mx.getSystemLoadAverage() * 100 / cores;
       return formatter.format(d);
}
 

public static double getLoad() {
	try {
		OperatingSystemMXBean os = ManagementFactory.getOperatingSystemMXBean();
		return os.getSystemLoadAverage();
	}
	catch (Exception ex) {
	}
	return 0;
}
 

@Override
protected Result check() throws Exception {
	OperatingSystemMXBean operatingSystemMXBean = ManagementFactory.getOperatingSystemMXBean();
	double load = operatingSystemMXBean.getSystemLoadAverage();
	int cpu = operatingSystemMXBean.getAvailableProcessors();
	if (load < cpu) {
		return Result.healthy();
	} else {
		return Result.unhealthy("load:%s,cpu:%s", load, cpu);
	}
	
}
 

private static double buildSystemLoadAverage() {
	// System load average for the last minute.
	// The system load average is the sum of
	// the number of runnable entities queued to the available processors
	// and the number of runnable entities running on the available processors
	// averaged over a period of time.
	final OperatingSystemMXBean operatingSystem = ManagementFactory.getOperatingSystemMXBean();
	if (operatingSystem.getSystemLoadAverage() >= 0) {
		// systemLoadAverage n'existe qu'à partir du jdk 1.6
		return operatingSystem.getSystemLoadAverage();
	}
	return -1;
}
 

/**
 * Get CPU performance as a String, adjusted by cores
 * 
 * @return String. Returns a cpu percentage string
 */
public static String getCpuPerfAsString() {
	OperatingSystemMXBean mx = java.lang.management.ManagementFactory.getOperatingSystemMXBean();
	int cores = Runtime.getRuntime().availableProcessors();
	double d = mx.getSystemLoadAverage() * 100 / cores;
       return formatter.format(d);
}
 

private void analyzeCpuUsage(final List<String> details) {
    final OperatingSystemMXBean os = ManagementFactory.getOperatingSystemMXBean();

    final double loadAverage = os.getSystemLoadAverage();
    final int availableProcs = os.getAvailableProcessors();

    if (loadAverage > availableProcs) {
        details.add(String.format("1-minute CPU Load Average is %1$.2f, which exceeds the %2$d available cores. CPU is over-utilized.", loadAverage, availableProcs));
    } else if (loadAverage > 0.9 * availableProcs) {
        details.add(String.format("1-minute CPU Load Average is %1$.2f, which exceeds 90%% of the %2$d available cores. CPU may struggle to keep up.", loadAverage, availableProcs));
    }
}
 

private static void getSystemInfo( SlaveServerStatus serverStatus ) {
  OperatingSystemMXBean operatingSystemMXBean =
    java.lang.management.ManagementFactory.getOperatingSystemMXBean();
  ThreadMXBean threadMXBean = java.lang.management.ManagementFactory.getThreadMXBean();
  RuntimeMXBean runtimeMXBean = java.lang.management.ManagementFactory.getRuntimeMXBean();

  int cores = Runtime.getRuntime().availableProcessors();

  long freeMemory = Runtime.getRuntime().freeMemory();
  long totalMemory = Runtime.getRuntime().totalMemory();
  String osArch = operatingSystemMXBean.getArch();
  String osName = operatingSystemMXBean.getName();
  String osVersion = operatingSystemMXBean.getVersion();
  double loadAvg = operatingSystemMXBean.getSystemLoadAverage();

  int threadCount = threadMXBean.getThreadCount();
  long allThreadsCpuTime = 0L;

  long[] threadIds = threadMXBean.getAllThreadIds();
  for ( int i = 0; i < threadIds.length; i++ ) {
    allThreadsCpuTime += threadMXBean.getThreadCpuTime( threadIds[ i ] );
  }

  long uptime = runtimeMXBean.getUptime();

  serverStatus.setCpuCores( cores );
  serverStatus.setCpuProcessTime( allThreadsCpuTime );
  serverStatus.setUptime( uptime );
  serverStatus.setThreadCount( threadCount );
  serverStatus.setLoadAvg( loadAvg );
  serverStatus.setOsName( osName );
  serverStatus.setOsVersion( osVersion );
  serverStatus.setOsArchitecture( osArch );
  serverStatus.setMemoryFree( freeMemory );
  serverStatus.setMemoryTotal( totalMemory );
}
 

public ServerStatus() {
  OperatingSystemMXBean operatingSystemMXBean =
    java.lang.management.ManagementFactory.getOperatingSystemMXBean();
  ThreadMXBean threadMXBean = java.lang.management.ManagementFactory.getThreadMXBean();
  RuntimeMXBean runtimeMXBean = java.lang.management.ManagementFactory.getRuntimeMXBean();

  int cores = Runtime.getRuntime().availableProcessors();

  long freeMemory = Runtime.getRuntime().freeMemory();
  long totalMemory = Runtime.getRuntime().totalMemory();
  String osArch = operatingSystemMXBean.getArch();
  String osName = operatingSystemMXBean.getName();
  String osVersion = operatingSystemMXBean.getVersion();
  double loadAvg = operatingSystemMXBean.getSystemLoadAverage();

  int threadCount = threadMXBean.getThreadCount();
  long allThreadsCpuTime = 0L;

  long[] threadIds = threadMXBean.getAllThreadIds();
  for ( int i = 0; i < threadIds.length; i++ ) {
    allThreadsCpuTime += threadMXBean.getThreadCpuTime( threadIds[i] );
  }

  long uptime = runtimeMXBean.getUptime();

  setCpuCores( cores );
  setCpuProcessTime( allThreadsCpuTime );
  setUptime( uptime );
  setThreadCount( threadCount );
  setLoadAvg( loadAvg );
  setOsName( osName );
  setOsVersion( osVersion );
  setOsArchitecture( osArch );
  setMemoryFree( freeMemory );
  setMemoryTotal( totalMemory );
}