001/**
002 * Copyright 2005-2016 The Kuali Foundation
003 *
004 * Licensed under the Educational Community License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 * http://www.opensource.org/licenses/ecl2.php
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016package org.kuali.rice.web.health;
017
018import com.codahale.metrics.Gauge;
019import com.codahale.metrics.RatioGauge;
020
021/**
022 * A simple {@link RatioGauge} that calculates the ratio of used memory to maximum memory.
023 *
024 * @author Eric Westfall
025 */
026public class MemoryUsageRatio extends RatioGauge {
027
028    private final Gauge<Long> totalUsed;
029    private final Gauge<Long> totalMax;
030
031    public MemoryUsageRatio(Gauge<Long> totalUsed, Gauge<Long> totalMax) {
032        this.totalUsed = totalUsed;
033        this.totalMax = totalMax;
034    }
035
036    @Override
037    protected Ratio getRatio() {
038        return Ratio.of(totalUsed.getValue(), totalMax.getValue());
039    }
040
041}