/*
 * MemTest.java
 *
 * ...
 * ...
 * @author Oystein Reigem
 */

package aksis.alignment;

import java.lang.management.*;
import java.util.*;

public class MemTest {

	public static void print(String pool, String type) {
		// type = "Heap memory" or "Non-heap memory" or ""
		List<MemoryPoolMXBean> pools = ManagementFactory.getMemoryPoolMXBeans();
		for (MemoryPoolMXBean p: pools) {
			if ((pool == "") && (type == "")) {
				System.out.println("Memory pool name=" + p.getName() + " Memory type=" + p.getType() + " Memory usage=" + p.getUsage());
			} else {
				if (   p.getName().startsWith(pool)
				    || type.equals(p.getType().toString())
				   ) {
					//System.out.println(("" + (1000000000 + p.getUsage().getUsed())).substring(1, 10));
					System.out.println(
						  "used "  + ("" + (1000000000 + p.getUsage().getUsed())).substring(1, 10)
						+ " "
						+ ", max " + ("" + (1000000000 + p.getUsage().getMax())).substring(1, 10)
					);
				}
			}
		}
	}

	// 2006-10-03

	// returns remaining heap space (??????????) in bytes

	public static long getRemainingHeap() {
		List<MemoryPoolMXBean> pools = ManagementFactory.getMemoryPoolMXBeans();
		for (MemoryPoolMXBean p: pools) {
			//if (p.getType().toString().equals("Heap memory")) {
			if (p.getName().startsWith("Tenured Gen")) {
				//System.out.println("max " + p.getUsage().getMax());
				//System.out.println("used " + p.getUsage().getUsed());
				return p.getUsage().getMax() - p.getUsage().getUsed();
			}
		}
		// ### error
		return -1;
	}

	public static long[] getMemoryUsage() {
		//System.out.println("MemTest sin getMemoryUsage()");
		List<MemoryPoolMXBean> pools = ManagementFactory.getMemoryPoolMXBeans();
		for (MemoryPoolMXBean p: pools) {
			if (p.getName().startsWith("Tenured Gen")) {
				long[] array = new long[2];
				array[0] = p.getUsage().getMax();
				//System.out.println(array[0]);
				array[1] = p.getUsage().getUsed();
				//System.out.println(array[1]);
				return array;
			}
		}
		// ### error
		return null;
	}
	// end 2006-10-03
    
        /* Added by boerre
         * Get memory percent usage
         */

        public static int getMemoryPercentUsed() {
		List<MemoryPoolMXBean> pools = ManagementFactory.getMemoryPoolMXBeans();
		for (MemoryPoolMXBean p: pools) {
			if (p.getName().startsWith("Tenured Gen")) {
				long max = p.getUsage().getMax();
				//System.out.println(array[0]);
				long used = p.getUsage().getUsed();
				//System.out.println(array[1]);
				return Math.round((float)((float)(used) / max * 100.0));
			}
		}
		// ### error
		return -1;
	}

}