package com.onaro.util;

import java.lang.management.ManagementFactory;
import java.lang.management.MemoryUsage;

import com.onaro.commons.util.Unit;

/**
 * Utility class to provide easy access to information from the java.lang.management classes.
 *
 */
public class ManagementUtil {

    public static long getTotalMemoryUsage(Unit unit) {
        return Unit.BYTE.convertTo(getHeapMemoryUsage().getUsed() + getNonHeapMemoryUsage().getUsed(), unit);
    }
    
    public static long getTotalMaxUsage(Unit unit) {
        return Unit.BYTE.convertTo(getHeapMemoryUsage().getMax() + getNonHeapMemoryUsage().getMax(), unit);
    }
    
    public static MemoryUsage getHeapMemoryUsage() {
        return ManagementFactory.getMemoryMXBean().getHeapMemoryUsage();
    }
    
    public static MemoryUsage getNonHeapMemoryUsage() {
        return ManagementFactory.getMemoryMXBean().getNonHeapMemoryUsage();
    }
    
    public static long getUptime(Unit unit) {
        return Unit.MILLISECOND.convertTo(ManagementFactory.getRuntimeMXBean().getUptime(), unit);
    }
    
    public static long getStartTime(Unit unit) {
        return Unit.MILLISECOND.convertTo(ManagementFactory.getRuntimeMXBean().getStartTime(), unit);
    }
}