package jalview.bin;

import java.lang.management.ManagementFactory;
import java.lang.management.OperatingSystemMXBean;

public class MemoryPercent
{

  protected static long getPhysicalMemory()
  {
    final OperatingSystemMXBean o = ManagementFactory
            .getOperatingSystemMXBean();

    try
    {
      if (o instanceof com.sun.management.OperatingSystemMXBean)
      {
        final com.sun.management.OperatingSystemMXBean osb = (com.sun.management.OperatingSystemMXBean) o;
        return osb.getTotalPhysicalMemorySize();
      }
    } catch (NoClassDefFoundError e)
    {
      // com.sun.management.OperatingSystemMXBean doesn't exist in this JVM
      System.err.println(
              "No com.sun.management.OperatingSystemMXBean: cannot get total physical memory size");
    }

    // We didn't get a com.sun.management.OperatingSystemMXBean.
    return -1;
  }

}