001 /* 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache License, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 */ 017 package org.apache.commons.monitoring.reporting.web.plugin.jvm.gauges; 018 019 import org.apache.commons.monitoring.Role; 020 import org.apache.commons.monitoring.configuration.Configuration; 021 import org.apache.commons.monitoring.counters.Unit; 022 import org.apache.commons.monitoring.gauges.Gauge; 023 024 import java.lang.management.ManagementFactory; 025 import java.lang.management.OperatingSystemMXBean; 026 027 public class CPUGauge implements Gauge { 028 public static final Role CPU = new Role("CPU", Unit.UNARY); 029 030 private static final OperatingSystemMXBean SYSTEM_MX_BEAN = ManagementFactory.getOperatingSystemMXBean(); 031 032 @Override 033 public Role role() { 034 return CPU; 035 } 036 037 @Override 038 public double value() { 039 return SYSTEM_MX_BEAN.getSystemLoadAverage(); 040 } 041 042 @Override 043 public long period() { 044 return Configuration.getInteger(Configuration.COMMONS_MONITORING_PREFIX + "gauge.cpu.period", 4000); 045 } 046 }