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.counters.Unit;
021    
022    public class UsedMemoryGauge extends BaseMemoryGauge {
023        public static final Role USED_MEMORY = new Role("Used Memory", Unit.UNARY);
024    
025        @Override
026        public Role role() {
027            return USED_MEMORY;
028        }
029    
030        @Override
031        public double value() {
032            return MEMORY_MX_BEAN.getHeapMemoryUsage().getUsed();
033        }
034    }