| /** |
| * |
| * Copyright 2004 The Apache Software Foundation |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.activeio.stats; |
| |
| import javax.management.j2ee.statistics.Statistic; |
| |
| /** |
| * Shamelessly taken from the ActiveMQ project ( http://activemq.com ) |
| * |
| * Base class for a Statistic implementation |
| * @version $Revision: 1.1 $ |
| */ |
| public class StatisticImpl implements Statistic { |
| private String name; |
| private String unit; |
| private String description; |
| private long startTime; |
| private long lastSampleTime; |
| |
| public StatisticImpl(String name, String unit, String description) { |
| this.name = name; |
| this.unit = unit; |
| this.description = description; |
| startTime = System.currentTimeMillis(); |
| lastSampleTime = startTime; |
| } |
| |
| public synchronized void reset() { |
| startTime = System.currentTimeMillis(); |
| lastSampleTime = startTime; |
| } |
| |
| protected synchronized void updateSampleTime() { |
| lastSampleTime = System.currentTimeMillis(); |
| } |
| |
| public synchronized String toString() { |
| StringBuffer buffer = new StringBuffer(); |
| buffer.append(name); |
| buffer.append("{"); |
| appendFieldDescription(buffer); |
| buffer.append(" }"); |
| return buffer.toString(); |
| } |
| |
| public String getName() { |
| return name; |
| } |
| |
| public String getUnit() { |
| return unit; |
| } |
| |
| public String getDescription() { |
| return description; |
| } |
| |
| public synchronized long getStartTime() { |
| return startTime; |
| } |
| |
| public synchronized long getLastSampleTime() { |
| return lastSampleTime; |
| } |
| |
| protected synchronized void appendFieldDescription(StringBuffer buffer) { |
| buffer.append(" unit: "); |
| buffer.append(unit); |
| buffer.append(" startTime: "); |
| //buffer.append(new Date(startTime)); |
| buffer.append(startTime); |
| buffer.append(" lastSampleTime: "); |
| //buffer.append(new Date(lastSampleTime)); |
| buffer.append(lastSampleTime); |
| buffer.append(" description: "); |
| buffer.append(description); |
| } |
| } |