ActiveMQ example source code file (StatisticImpl.java)

This example ActiveMQ source code file (StatisticImpl.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - ActiveMQ tags/keywords

resettable, resettable, statistic, statisticimpl, statisticimpl, string, string, stringbuffer, stringbuffer

The ActiveMQ StatisticImpl.java source code

/**
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.activemq.management;

import javax.management.j2ee.statistics.Statistic;

/**
 * Base class for a Statistic implementation
 * 
 * 
 */
public class StatisticImpl implements Statistic, Resettable {

    protected boolean enabled;

    private String name;
    private String unit;
    private String description;
    private long startTime;
    private long lastSampleTime;
    private boolean doReset = true;

    public StatisticImpl(String name, String unit, String description) {
        this.name = name;
        this.unit = unit;
        this.description = description;
        this.startTime = System.currentTimeMillis();
        this.lastSampleTime = this.startTime;
    }

    public synchronized void reset() {
        if(isDoReset()) {
            this.startTime = System.currentTimeMillis();
            this.lastSampleTime = this.startTime;
        }
    }

    protected synchronized void updateSampleTime() {
        this.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 this.name;
    }

    public String getUnit() {
        return this.unit;
    }

    public String getDescription() {
        return this.description;
    }

    public synchronized long getStartTime() {
        return this.startTime;
    }

    public synchronized long getLastSampleTime() {
        return this.lastSampleTime;
    }

    /**
     * @return the enabled
     */
    public boolean isEnabled() {
        return this.enabled;
    }

    /**
     * @param enabled the enabled to set
     */
    public void setEnabled(boolean enabled) {
        this.enabled = enabled;
    }
    
    /**
     * @return the doReset
     */
    public boolean isDoReset() {
        return this.doReset;
    }

    /**
     * @param doReset the doReset to set
     */
    public void setDoReset(boolean doReset) {
        this.doReset = doReset;
    }


    protected synchronized void appendFieldDescription(StringBuffer buffer) {
        buffer.append(" unit: ");
        buffer.append(this.unit);
        buffer.append(" startTime: ");
        // buffer.append(new Date(startTime));
        buffer.append(this.startTime);
        buffer.append(" lastSampleTime: ");
        // buffer.append(new Date(lastSampleTime));
        buffer.append(this.lastSampleTime);
        buffer.append(" description: ");
        buffer.append(this.description);
    }
}