meminfo.java

电信的网厅的整站代码

/**
 * 
 */
package com.doone.wskfmgr.business.monitor.data;

import java.util.StringTokenizer;

import com.doone.wskfmgr.business.monitor.EchoClient;

/**
 * @author chenc
 * 作用：获取内存信息，并合算出内存使用率；
 */
public class MemInfo implements DataIntegrate {

	/* (non-Javadoc)
	 * @see com.doone.wskfmgr.business.monitor.data.DataIntegrate#getData()
	 */

	private static MemInfo meminfo = null;

	public final static MemInfo newInstence() {
		if (meminfo == null) {
			meminfo = new MemInfo();
		}
		return meminfo;
	}

	public double[] getData() {
		double[] mem = new double[4];
		double[] meminfo = new double[2];
		String fromServer = EchoClient.clientTest(EchoClient.MEMORY);

		StringTokenizer token = new StringTokenizer(fromServer,"#");
		int i = 0;
		while (token.hasMoreTokens()) {
			mem[i++] = Float.parseFloat(token.nextToken());
		}
		try {
			//为什么这么算，根据不同的基于UNIX核心的Linux系统的虚拟文件系统有不同的算法。详情请参考网上资料 :)。
			meminfo[0] = (double) (mem[0] - mem[1]) / mem[0];//memory  utilization
			meminfo[1] = (double) (mem[2] - mem[3]) / mem[2]; //Swap utilization

		} catch (NumberFormatException e) {
			System.out.println(e.getMessage());
		}
		return meminfo;
	}
	public static void main(String[] args) {
		System.out.println(MemInfo.newInstence().getData()[0]);
	}

}