test.java

jrobin,使用纯java实现的RRD数据库,使用RRD数据库来统计数据.

package org.jrobin.demo;

import java.io.FileReader;
import java.io.BufferedReader;
import java.io.IOException;


class Test {
	public static final String LOADAVG_FILE = "/proc/loadavg";

	public static void main(String[] args) throws IOException {
		BufferedReader r = new BufferedReader(new FileReader(LOADAVG_FILE));
		try {
			String line = r.readLine();
			if (line != null) {
				String[] loads = line.split("\\s+");
				if (loads.length >= 3) {
					String load = loads[0] + " " + loads[1] + " " + loads[2];
					System.out.println("LOAD = " + load);
					return;
				}
				System.out.println("Unexpected error while parsing file " + LOADAVG_FILE);
			}
		}
		finally {
			r.close();
		}
	}
}