ActiveMQ example source code file (JMSEndpointStatsImpl.java)

This example ActiveMQ source code file (JMSEndpointStatsImpl.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

cannot, countstatisticimpl, countstatisticimpl, endpoint, jmsendpointstatsimpl, jmsendpointstatsimpl, logger, number, number, override, stringbuffer, time, timestatisticimpl, timestatisticimpl

The ActiveMQ JMSEndpointStatsImpl.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.jms.Destination;
import javax.jms.MessageConsumer;
import javax.jms.MessageProducer;
import javax.jms.Session;

import org.apache.activemq.util.IndentPrinter;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * Statistics for a JMS endpoint, typically a MessageProducer or MessageConsumer
 * but this class can also be used to represent statistics on a
 * {@link Destination} as well.
 * 
 * 
 */
public class JMSEndpointStatsImpl extends StatsImpl {
    private static final Logger LOG = LoggerFactory.getLogger(JMSEndpointStatsImpl.class);

    protected CountStatisticImpl messageCount;
    protected CountStatisticImpl pendingMessageCount;
    protected CountStatisticImpl expiredMessageCount;
    protected TimeStatisticImpl messageWaitTime;
    protected TimeStatisticImpl messageRateTime;

    /**
     * This constructor is used to create statistics for a
     * {@link MessageProducer} or {@link MessageConsumer} as it passes in a
     * {@link Session} parent statistic.
     * 
     * @param sessionStats
     */
    public JMSEndpointStatsImpl(JMSSessionStatsImpl sessionStats) {
        this();
        setParent(messageCount, sessionStats.getMessageCount());
        setParent(pendingMessageCount, sessionStats.getPendingMessageCount());
        setParent(expiredMessageCount, sessionStats.getExpiredMessageCount());
        setParent(messageWaitTime, sessionStats.getMessageWaitTime());
        setParent(messageRateTime, sessionStats.getMessageRateTime());
    }

    /**
     * This constructor is typically used to create a statistics object for a
     * {@link Destination}
     */
    public JMSEndpointStatsImpl() {
        this(new CountStatisticImpl("messageCount", "Number of messages processed"), new CountStatisticImpl("pendingMessageCount", "Number of pending messages"),
             new CountStatisticImpl("expiredMessageCount", "Number of expired messages"),
             new TimeStatisticImpl("messageWaitTime", "Time spent by a message before being delivered"), new TimeStatisticImpl("messageRateTime",
                                                                                                                               "Time taken to process a message (thoughtput rate)"));
    }

    public JMSEndpointStatsImpl(CountStatisticImpl messageCount, CountStatisticImpl pendingMessageCount, CountStatisticImpl expiredMessageCount, TimeStatisticImpl messageWaitTime,
                                TimeStatisticImpl messageRateTime) {
        this.messageCount = messageCount;
        this.pendingMessageCount = pendingMessageCount;
        this.expiredMessageCount = expiredMessageCount;
        this.messageWaitTime = messageWaitTime;
        this.messageRateTime = messageRateTime;

        // lets add named stats
        addStatistic("messageCount", messageCount);
        addStatistic("pendingMessageCount", pendingMessageCount);
        addStatistic("expiredMessageCount", expiredMessageCount);
        addStatistic("messageWaitTime", messageWaitTime);
        addStatistic("messageRateTime", messageRateTime);
    }

    public synchronized void reset() {
        super.reset();
        messageCount.reset();
        messageRateTime.reset();
        pendingMessageCount.reset();
        expiredMessageCount.reset();
        messageWaitTime.reset();
    }

    public CountStatisticImpl getMessageCount() {
        return messageCount;
    }

    public CountStatisticImpl getPendingMessageCount() {
        return pendingMessageCount;
    }

    public CountStatisticImpl getExpiredMessageCount() {
        return expiredMessageCount;
    }

    public TimeStatisticImpl getMessageRateTime() {
        return messageRateTime;
    }

    public TimeStatisticImpl getMessageWaitTime() {
        return messageWaitTime;
    }

    public String toString() {
        StringBuffer buffer = new StringBuffer();
        buffer.append(messageCount);
        buffer.append(" ");
        buffer.append(messageRateTime);
        buffer.append(" ");
        buffer.append(pendingMessageCount);
        buffer.append(" ");
        buffer.append(expiredMessageCount);
        buffer.append(" ");
        buffer.append(messageWaitTime);
        return buffer.toString();
    }

    public void onMessage() {
        if (enabled) {
            long start = messageCount.getLastSampleTime();
            messageCount.increment();
            long end = messageCount.getLastSampleTime();
            messageRateTime.addTime(end - start);
        }
    }

    @Override
    public void setEnabled(boolean enabled) {
        super.setEnabled(enabled);
        messageCount.setEnabled(enabled);
        messageRateTime.setEnabled(enabled);
        pendingMessageCount.setEnabled(enabled);
        expiredMessageCount.setEnabled(enabled);
        messageWaitTime.setEnabled(enabled);
    }

    public void dump(IndentPrinter out) {
        out.printIndent();
        out.println(messageCount);
        out.printIndent();
        out.println(messageRateTime);
        out.printIndent();
        out.println(pendingMessageCount);
        out.printIndent();
        out.println(messageRateTime);
        out.printIndent();
        out.println(expiredMessageCount);
        out.printIndent();
        out.println(messageWaitTime);
    }

    // Implementation methods
    // -------------------------------------------------------------------------
    protected void setParent(CountStatisticImpl child, CountStatisticImpl parent) {
        if (child instanceof CountStatisticImpl && parent instanceof CountStatisticImpl) {
            CountStatisticImpl c = (CountStatisticImpl)child;
            c.setParent((CountStatisticImpl)parent);
        } else {
            LOG.warn("Cannot associate endpoint counters with session level counters as they are not both CountStatisticImpl clases. Endpoint: " + child + " session: " + parent);
        }
    }

    protected void setParent(TimeStatisticImpl child, TimeStatisticImpl parent) {
        if (child instanceof TimeStatisticImpl && parent instanceof TimeStatisticImpl) {
            TimeStatisticImpl c = (TimeStatisticImpl)child;
            c.setParent((TimeStatisticImpl)parent);
        } else {
            LOG.warn("Cannot associate endpoint counters with session level counters as they are not both TimeStatisticImpl clases. Endpoint: " + child + " session: " + parent);
        }
    }
}