001 /**
002 *
003 * Copyright 2004 Protique Ltd
004 *
005 * Licensed under the Apache License, Version 2.0 (the "License");
006 * you may not use this file except in compliance with the License.
007 * 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 **/
018 package org.activemq.management;
019
020
021 /**
022 * A range statistic implementation
023 *
024 * @version $Revision: 1.1.1.1 $
025 */
026 public class RangeStatisticImpl extends StatisticImpl {
027 private long highWaterMark;
028 private long lowWaterMark;
029 private long current;
030
031 public RangeStatisticImpl(String name, String unit, String description) {
032 super(name, unit, description);
033 }
034
035 public void reset() {
036 super.reset();
037 current = 0;
038 lowWaterMark = 0;
039 highWaterMark = 0;
040 }
041
042 public long getHighWaterMark() {
043 return highWaterMark;
044 }
045
046 public long getLowWaterMark() {
047 return lowWaterMark;
048 }
049
050 public long getCurrent() {
051 return current;
052 }
053
054 public void setCurrent(long current) {
055 this.current = current;
056 if (current > highWaterMark) {
057 highWaterMark = current;
058 }
059 if (current < lowWaterMark || lowWaterMark == 0) {
060 lowWaterMark = current;
061 }
062 updateSampleTime();
063 }
064
065 protected void appendFieldDescription(StringBuffer buffer) {
066 buffer.append(" current: ");
067 buffer.append(Long.toString(current));
068 buffer.append(" lowWaterMark: ");
069 buffer.append(Long.toString(lowWaterMark));
070 buffer.append(" highWaterMark: ");
071 buffer.append(Long.toString(highWaterMark));
072 super.appendFieldDescription(buffer);
073 }
074 }