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ActiveMQ example source code file (StatisticsBroker.java)

This example ActiveMQ source code file (StatisticsBroker.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

activemqdestination, activemqdestination, activemqmapmessage, activemqmapmessage, destinationstatistics, exception, exception, idgenerator, io, longsequencegenerator, net, network, producerid, statisticsbroker, stats_broker_prefix, string, string, util

The ActiveMQ StatisticsBroker.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.plugin;

import org.apache.activemq.advisory.AdvisorySupport;
import org.apache.activemq.broker.Broker;
import org.apache.activemq.broker.BrokerFilter;
import org.apache.activemq.broker.BrokerService;
import org.apache.activemq.broker.ConnectionContext;
import org.apache.activemq.broker.ProducerBrokerExchange;
import org.apache.activemq.broker.region.Destination;
import org.apache.activemq.broker.region.DestinationStatistics;
import org.apache.activemq.broker.region.RegionBroker;
import org.apache.activemq.command.ActiveMQDestination;
import org.apache.activemq.command.ActiveMQMapMessage;
import org.apache.activemq.command.Message;
import org.apache.activemq.command.MessageId;
import org.apache.activemq.command.ProducerId;
import org.apache.activemq.command.ProducerInfo;
import org.apache.activemq.state.ProducerState;
import org.apache.activemq.usage.SystemUsage;
import org.apache.activemq.util.IdGenerator;
import org.apache.activemq.util.LongSequenceGenerator;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.File;
import java.net.URI;
import java.util.Set;
/**
 * A StatisticsBroker You can retrieve a Map Message for a Destination - or
 * Broker containing statistics as key-value pairs The message must contain a
 * replyTo Destination - else its ignored
 * 
 */
public class StatisticsBroker extends BrokerFilter {
    private static Logger LOG = LoggerFactory.getLogger(StatisticsBroker.class);
    static final String STATS_DESTINATION_PREFIX = "ActiveMQ.Statistics.Destination";
    static final String STATS_BROKER_PREFIX = "ActiveMQ.Statistics.Broker";
    private static final IdGenerator ID_GENERATOR = new IdGenerator();
    private final LongSequenceGenerator messageIdGenerator = new LongSequenceGenerator();
    protected final ProducerId advisoryProducerId = new ProducerId();

    /**
     * 
     * Constructor
     * 
     * @param next
     */
    public StatisticsBroker(Broker next) {
        super(next);
        this.advisoryProducerId.setConnectionId(ID_GENERATOR.generateId());
    }

    /**
     * Sets the persistence mode
     * 
     * @see org.apache.activemq.broker.BrokerFilter#send(org.apache.activemq.broker.ProducerBrokerExchange,
     *      org.apache.activemq.command.Message)
     */
    public void send(ProducerBrokerExchange producerExchange, Message messageSend) throws Exception {
        ActiveMQDestination msgDest = messageSend.getDestination();
        ActiveMQDestination replyTo = messageSend.getReplyTo();
        if (replyTo != null) {
            String physicalName = msgDest.getPhysicalName();
            boolean destStats = physicalName.regionMatches(true, 0, STATS_DESTINATION_PREFIX, 0,
                    STATS_DESTINATION_PREFIX.length());
            boolean brokerStats = physicalName.regionMatches(true, 0, STATS_BROKER_PREFIX, 0, STATS_BROKER_PREFIX
                    .length());
            if (destStats) {
                String queueryName = physicalName.substring(STATS_DESTINATION_PREFIX.length(), physicalName.length());
                ActiveMQDestination queryDest = ActiveMQDestination.createDestination(queueryName,msgDest.getDestinationType());
                Set<Destination> set = getDestinations(queryDest);
                for (Destination dest : set) {
                    DestinationStatistics stats = dest.getDestinationStatistics();
                    if (stats != null) {
                        ActiveMQMapMessage statsMessage = new ActiveMQMapMessage();
                        statsMessage.setString("destinationName", dest.getActiveMQDestination().toString());
                        statsMessage.setLong("size", stats.getMessages().getCount());
                        statsMessage.setLong("enqueueCount", stats.getEnqueues().getCount());
                        statsMessage.setLong("dequeueCount", stats.getDequeues().getCount());
                        statsMessage.setLong("dispatchCount", stats.getDispatched().getCount());
                        statsMessage.setLong("expiredCount", stats.getExpired().getCount());
                        statsMessage.setLong("inflightCount", stats.getInflight().getCount());
                        statsMessage.setLong("messagesCached", stats.getMessagesCached().getCount());
                        statsMessage.setInt("memoryPercentUsage", dest.getMemoryUsage().getPercentUsage());
                        statsMessage.setLong("memoryUsage", dest.getMemoryUsage().getUsage());
                        statsMessage.setLong("memoryLimit", dest.getMemoryUsage().getLimit());
                        statsMessage.setDouble("averageEnqueueTime", stats.getProcessTime().getAverageTime());
                        statsMessage.setDouble("maxEnqueueTime", stats.getProcessTime().getMaxTime());
                        statsMessage.setDouble("minEnqueueTime", stats.getProcessTime().getMinTime());
                        statsMessage.setLong("consumerCount", stats.getConsumers().getCount());
                        statsMessage.setLong("producerCount", stats.getProducers().getCount());
                        statsMessage.setJMSCorrelationID(messageSend.getCorrelationId());
                        sendStats(producerExchange.getConnectionContext(), statsMessage, replyTo);
                    }
                }
            } else if (brokerStats) {
                ActiveMQMapMessage statsMessage = new ActiveMQMapMessage();
                BrokerService brokerService = getBrokerService();
                RegionBroker regionBroker = (RegionBroker) brokerService.getRegionBroker();
                SystemUsage systemUsage = brokerService.getSystemUsage();
                DestinationStatistics stats = regionBroker.getDestinationStatistics();
                statsMessage.setString("brokerName", regionBroker.getBrokerName());
                statsMessage.setString("brokerId", regionBroker.getBrokerId().toString());
                statsMessage.setLong("size", stats.getMessages().getCount());
                statsMessage.setLong("enqueueCount", stats.getEnqueues().getCount());
                statsMessage.setLong("dequeueCount", stats.getDequeues().getCount());
                statsMessage.setLong("dispatchCount", stats.getDispatched().getCount());
                statsMessage.setLong("expiredCount", stats.getExpired().getCount());
                statsMessage.setLong("inflightCount", stats.getInflight().getCount());
                statsMessage.setLong("messagesCached", stats.getMessagesCached().getCount());
                statsMessage.setInt("memoryPercentUsage", systemUsage.getMemoryUsage().getPercentUsage());
                statsMessage.setLong("memoryUsage", systemUsage.getMemoryUsage().getUsage());
                statsMessage.setLong("memoryLimit", systemUsage.getMemoryUsage().getLimit());
                statsMessage.setInt("storePercentUsage", systemUsage.getStoreUsage().getPercentUsage());
                statsMessage.setLong("storeUsage", systemUsage.getStoreUsage().getUsage());
                statsMessage.setLong("storeLimit", systemUsage.getStoreUsage().getLimit());
                statsMessage.setInt("tempPercentUsage", systemUsage.getTempUsage().getPercentUsage());
                statsMessage.setLong("tempUsage", systemUsage.getTempUsage().getUsage());
                statsMessage.setLong("tempLimit", systemUsage.getTempUsage().getLimit());
                statsMessage.setDouble("averageEnqueueTime", stats.getProcessTime().getAverageTime());
                statsMessage.setDouble("maxEnqueueTime", stats.getProcessTime().getMaxTime());
                statsMessage.setDouble("minEnqueueTime", stats.getProcessTime().getMinTime());
                statsMessage.setLong("consumerCount", stats.getConsumers().getCount());
                statsMessage.setLong("producerCount", stats.getProducers().getCount());
                String answer = brokerService.getTransportConnectorURIsAsMap().get("tcp");
                answer = answer != null ? answer : "";
                statsMessage.setString("openwire", answer);
                answer = brokerService.getTransportConnectorURIsAsMap().get("stomp");
                answer = answer != null ? answer : "";
                statsMessage.setString("stomp", answer);
                answer = brokerService.getTransportConnectorURIsAsMap().get("ssl");
                answer = answer != null ? answer : "";
                statsMessage.setString("ssl", answer);
                answer = brokerService.getTransportConnectorURIsAsMap().get("stomp+ssl");
                answer = answer != null ? answer : "";
                statsMessage.setString("stomp+ssl", answer);
                URI uri = brokerService.getVmConnectorURI();
                answer = uri != null ? uri.toString() : "";
                statsMessage.setString("vm", answer);
                File file = brokerService.getDataDirectoryFile();
                answer = file != null ? file.getCanonicalPath() : "";
                statsMessage.setString("dataDirectory", answer);
                statsMessage.setJMSCorrelationID(messageSend.getCorrelationId());
                sendStats(producerExchange.getConnectionContext(), statsMessage, replyTo);
            } else {
                super.send(producerExchange, messageSend);
            }
        } else {
            super.send(producerExchange, messageSend);
        }
    }

    public void start() throws Exception {
        super.start();
        LOG.info("Starting StatisticsBroker");
    }

    public void stop() throws Exception {
        super.stop();
    }

    protected void sendStats(ConnectionContext context, ActiveMQMapMessage msg, ActiveMQDestination replyTo)
            throws Exception {
        msg.setPersistent(false);
        msg.setType(AdvisorySupport.ADIVSORY_MESSAGE_TYPE);
        msg.setMessageId(new MessageId(this.advisoryProducerId, this.messageIdGenerator.getNextSequenceId()));
        msg.setDestination(replyTo);
        msg.setResponseRequired(false);
        msg.setProducerId(this.advisoryProducerId);
        boolean originalFlowControl = context.isProducerFlowControl();
        final ProducerBrokerExchange producerExchange = new ProducerBrokerExchange();
        producerExchange.setConnectionContext(context);
        producerExchange.setMutable(true);
        producerExchange.setProducerState(new ProducerState(new ProducerInfo()));
        try {
            context.setProducerFlowControl(false);
            this.next.send(producerExchange, msg);
        } finally {
            context.setProducerFlowControl(originalFlowControl);
        }
    }
}

Other ActiveMQ examples (source code examples)

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