1 /* 2 * Copyright (c) 2011, 2015, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 /* 25 * @test 26 * @bug 7028071 27 * @summary Basic unit test of OperatingSystemMXBean.getProcessCpuLoad() 28 * 29 * @modules jdk.management 30 * @run main GetProcessCpuLoad 31 */ 32 33 import java.lang.management.*; 34 import com.sun.management.OperatingSystemMXBean; 35 36 public class GetProcessCpuLoad { 37 public static void main(String[] argv) throws Exception { 38 OperatingSystemMXBean mbean = (com.sun.management.OperatingSystemMXBean) 39 ManagementFactory.getOperatingSystemMXBean(); 40 double load; 41 for(int i=0; i<10; i++) { 42 load = mbean.getProcessCpuLoad(); 43 if((load<0.0 || load>1.0) && load != -1.0) { 44 throw new RuntimeException("getProcessCpuLoad() returns " + load 45 + " which is not in the [0.0,1.0] interval"); 46 } 47 try { 48 Thread.sleep(200); 49 } catch(InterruptedException e) { 50 e.printStackTrace(); 51 } 52 } 53 } 54 }