1 /*** 2 * 3 * Copyright 2004 Protique Ltd 4 * 5 * Licensed under the Apache License, Version 2.0 (the "License"); 6 * you may not use this file except in compliance with the License. 7 * You may obtain a copy of the License at 8 * 9 * http://www.apache.org/licenses/LICENSE-2.0 10 * 11 * Unless required by applicable law or agreed to in writing, software 12 * distributed under the License is distributed on an "AS IS" BASIS, 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 * See the License for the specific language governing permissions and 15 * limitations under the License. 16 * 17 **/ 18 package org.codehaus.activemq.management; 19 20 import javax.management.j2ee.statistics.CountStatistic; 21 22 /*** 23 * A count statistic implementation 24 * 25 * @version $Revision: 1.3 $ 26 */ 27 public class CountStatisticImpl extends StatisticImpl implements CountStatistic { 28 29 private long count; 30 private CountStatisticImpl parent; 31 32 public CountStatisticImpl(CountStatisticImpl parent, String name, String description) { 33 this(name, description); 34 this.parent = parent; 35 } 36 37 public CountStatisticImpl(String name, String description) { 38 this(name, "count", description); 39 } 40 41 public CountStatisticImpl(String name, String unit, String description) { 42 super(name, unit, description); 43 } 44 45 public void reset() { 46 super.reset(); 47 count = 0; 48 } 49 50 public long getCount() { 51 return count; 52 } 53 54 public void increment() { 55 ++count; 56 updateSampleTime(); 57 if (parent != null) { 58 parent.increment(); 59 } 60 } 61 62 public void decrement() { 63 --count; 64 updateSampleTime(); 65 if (parent != null) { 66 parent.decrement(); 67 } 68 } 69 70 public CountStatisticImpl getParent() { 71 return parent; 72 } 73 74 public void setParent(CountStatisticImpl parent) { 75 this.parent = parent; 76 } 77 78 protected void appendFieldDescription(StringBuffer buffer) { 79 buffer.append(" count: "); 80 buffer.append(Long.toString(count)); 81 super.appendFieldDescription(buffer); 82 } 83 }