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ActiveMQ example source code file (DestinationView.java)

This example ActiveMQ source code file (DestinationView.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

arraylist, booleanexpression, exception, invalidselectorexception, invalidselectorexception, io, list, management, message, messageevaluationcontext, messageevaluationcontext, objectname, objectname, opendataexception, string, string, util

The ActiveMQ DestinationView.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.broker.jmx;

import java.io.IOException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import javax.jms.Connection;
import javax.jms.InvalidSelectorException;
import javax.jms.MessageProducer;
import javax.jms.Session;
import javax.management.MalformedObjectNameException;
import javax.management.ObjectName;
import javax.management.openmbean.CompositeData;
import javax.management.openmbean.CompositeDataSupport;
import javax.management.openmbean.CompositeType;
import javax.management.openmbean.OpenDataException;
import javax.management.openmbean.TabularData;
import javax.management.openmbean.TabularDataSupport;
import javax.management.openmbean.TabularType;
import org.apache.activemq.ActiveMQConnectionFactory;
import org.apache.activemq.broker.jmx.OpenTypeSupport.OpenTypeFactory;
import org.apache.activemq.broker.region.Destination;
import org.apache.activemq.broker.region.Subscription;
import org.apache.activemq.broker.region.policy.AbortSlowConsumerStrategy;
import org.apache.activemq.broker.region.policy.SlowConsumerStrategy;
import org.apache.activemq.command.ActiveMQDestination;
import org.apache.activemq.command.ActiveMQMessage;
import org.apache.activemq.command.ActiveMQTextMessage;
import org.apache.activemq.command.Message;
import org.apache.activemq.filter.BooleanExpression;
import org.apache.activemq.filter.MessageEvaluationContext;
import org.apache.activemq.selector.SelectorParser;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class DestinationView implements DestinationViewMBean {
    private static final Logger LOG = LoggerFactory.getLogger(DestinationViewMBean.class);
    protected final Destination destination;
    protected final ManagedRegionBroker broker;

    public DestinationView(ManagedRegionBroker broker, Destination destination) {
        this.broker = broker;
        this.destination = destination;
    }

    public void gc() {
        destination.gc();
    }

    public String getName() {
        return destination.getName();
    }

    public void resetStatistics() {
        destination.getDestinationStatistics().reset();
    }

    public long getEnqueueCount() {
        return destination.getDestinationStatistics().getEnqueues().getCount();
    }

    public long getDequeueCount() {
        return destination.getDestinationStatistics().getDequeues().getCount();
    }

    public long getDispatchCount() {
        return destination.getDestinationStatistics().getDispatched().getCount();
    }

    public long getInFlightCount() {
        return destination.getDestinationStatistics().getInflight().getCount();
    }

    public long getExpiredCount() {
        return destination.getDestinationStatistics().getExpired().getCount();
    }

    public long getConsumerCount() {
        return destination.getDestinationStatistics().getConsumers().getCount();
    }

    public long getQueueSize() {
        return destination.getDestinationStatistics().getMessages().getCount();
    }

    public long getMessagesCached() {
        return destination.getDestinationStatistics().getMessagesCached().getCount();
    }

    public int getMemoryPercentUsage() {
        return destination.getMemoryUsage().getPercentUsage();
    }

    public long getMemoryLimit() {
        return destination.getMemoryUsage().getLimit();
    }

    public void setMemoryLimit(long limit) {
        destination.getMemoryUsage().setLimit(limit);
    }

    public double getAverageEnqueueTime() {
        return destination.getDestinationStatistics().getProcessTime().getAverageTime();
    }

    public long getMaxEnqueueTime() {
        return destination.getDestinationStatistics().getProcessTime().getMaxTime();
    }

    public long getMinEnqueueTime() {
        return destination.getDestinationStatistics().getProcessTime().getMinTime();
    }
    
    public boolean isPrioritizedMessages() {
        return destination.isPrioritizedMessages();
    }

    public CompositeData[] browse() throws OpenDataException {
        try {
            return browse(null);
        } catch (InvalidSelectorException e) {
            // should not happen.
            throw new RuntimeException(e);
        }
    }

    public CompositeData[] browse(String selector) throws OpenDataException, InvalidSelectorException {
        Message[] messages = destination.browse();
        ArrayList<CompositeData> c = new ArrayList();

        MessageEvaluationContext ctx = new MessageEvaluationContext();
        ctx.setDestination(destination.getActiveMQDestination());
        BooleanExpression selectorExpression = selector == null ? null : SelectorParser.parse(selector);

        for (int i = 0; i < messages.length; i++) {
            try {

                if (selectorExpression == null) {
                    c.add(OpenTypeSupport.convert(messages[i]));
                } else {
                    ctx.setMessageReference(messages[i]);
                    if (selectorExpression.matches(ctx)) {
                        c.add(OpenTypeSupport.convert(messages[i]));
                    }
                }

            } catch (Throwable e) {
                // TODO DELETE ME
                System.out.println(e);
                e.printStackTrace();
                // TODO DELETE ME
                LOG.warn("exception browsing destination", e);
            }
        }

        CompositeData rc[] = new CompositeData[c.size()];
        c.toArray(rc);
        return rc;
    }

    /**
     * Browses the current destination returning a list of messages
     */
    public List<Object> browseMessages() throws InvalidSelectorException {
        return browseMessages(null);
    }

    /**
     * Browses the current destination with the given selector returning a list
     * of messages
     */
    public List<Object> browseMessages(String selector) throws InvalidSelectorException {
        Message[] messages = destination.browse();
        ArrayList<Object> answer = new ArrayList();

        MessageEvaluationContext ctx = new MessageEvaluationContext();
        ctx.setDestination(destination.getActiveMQDestination());
        BooleanExpression selectorExpression = selector == null ? null : SelectorParser.parse(selector);

        for (int i = 0; i < messages.length; i++) {
            try {
                Message message = messages[i];
                if (selectorExpression == null) {
                    answer.add(OpenTypeSupport.convert(message));
                } else {
                    ctx.setMessageReference(message);
                    if (selectorExpression.matches(ctx)) {
                        answer.add(message);
                    }
                }

            } catch (Throwable e) {
                LOG.warn("exception browsing destination", e);
            }
        }
        return answer;
    }

    public TabularData browseAsTable() throws OpenDataException {
        try {
            return browseAsTable(null);
        } catch (InvalidSelectorException e) {
            throw new RuntimeException(e);
        }
    }

    public TabularData browseAsTable(String selector) throws OpenDataException, InvalidSelectorException {
        OpenTypeFactory factory = OpenTypeSupport.getFactory(ActiveMQMessage.class);
        Message[] messages = destination.browse();
        CompositeType ct = factory.getCompositeType();
        TabularType tt = new TabularType("MessageList", "MessageList", ct, new String[] { "JMSMessageID" });
        TabularDataSupport rc = new TabularDataSupport(tt);

        MessageEvaluationContext ctx = new MessageEvaluationContext();
        ctx.setDestination(destination.getActiveMQDestination());
        BooleanExpression selectorExpression = selector == null ? null : SelectorParser.parse(selector);

        for (int i = 0; i < messages.length; i++) {
            try {
                if (selectorExpression == null) {
                    rc.put(new CompositeDataSupport(ct, factory.getFields(messages[i])));
                } else {
                    ctx.setMessageReference(messages[i]);
                    if (selectorExpression.matches(ctx)) {
                        rc.put(new CompositeDataSupport(ct, factory.getFields(messages[i])));
                    }
                }
            } catch (Throwable e) {
                LOG.warn("exception browsing destination", e);
            }
        }

        return rc;
    }

    public String sendTextMessage(String body) throws Exception {
        return sendTextMessage(Collections.EMPTY_MAP, body);
    }

    public String sendTextMessage(Map headers, String body) throws Exception {
        return sendTextMessage(headers, body, null, null);
    }

    public String sendTextMessage(String body, String user, String password) throws Exception {
        return sendTextMessage(Collections.EMPTY_MAP, body, user, password);
    }

    public String sendTextMessage(Map headers, String body, String userName, String password) throws Exception {

        String brokerUrl = "vm://" + broker.getBrokerName();
        ActiveMQDestination dest = destination.getActiveMQDestination();

        ActiveMQConnectionFactory cf = new ActiveMQConnectionFactory(brokerUrl);
        Connection connection = null;
        try {

            connection = cf.createConnection(userName, password);
            Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
            MessageProducer producer = session.createProducer(dest);
            ActiveMQTextMessage msg = (ActiveMQTextMessage) session.createTextMessage(body);

            for (Iterator iter = headers.entrySet().iterator(); iter.hasNext();) {
                Map.Entry entry = (Map.Entry) iter.next();
                msg.setObjectProperty((String) entry.getKey(), entry.getValue());
            }

            producer.setDeliveryMode(msg.getJMSDeliveryMode());
            producer.setPriority(msg.getPriority());
            long ttl = msg.getExpiration() - System.currentTimeMillis();
            producer.setTimeToLive(ttl > 0 ? ttl : 0);
            producer.send(msg);

            return msg.getJMSMessageID();

        } finally {
            connection.close();
        }

    }

    public int getMaxAuditDepth() {
        return destination.getMaxAuditDepth();
    }

    public int getMaxProducersToAudit() {
        return destination.getMaxProducersToAudit();
    }

    public boolean isEnableAudit() {
        return destination.isEnableAudit();
    }

    public void setEnableAudit(boolean enableAudit) {
        destination.setEnableAudit(enableAudit);
    }

    public void setMaxAuditDepth(int maxAuditDepth) {
        destination.setMaxAuditDepth(maxAuditDepth);
    }

    public void setMaxProducersToAudit(int maxProducersToAudit) {
        destination.setMaxProducersToAudit(maxProducersToAudit);
    }

    public float getMemoryUsagePortion() {
        return destination.getMemoryUsage().getUsagePortion();
    }

    public long getProducerCount() {
        return destination.getDestinationStatistics().getProducers().getCount();
    }

    public boolean isProducerFlowControl() {
        return destination.isProducerFlowControl();
    }

    public void setMemoryUsagePortion(float value) {
        destination.getMemoryUsage().setUsagePortion(value);
    }

    public void setProducerFlowControl(boolean producerFlowControl) {
        destination.setProducerFlowControl(producerFlowControl);
    }

    /**
     * Set's the interval at which warnings about producers being blocked by
     * resource usage will be triggered. Values of 0 or less will disable
     * warnings
     * 
     * @param blockedProducerWarningInterval the interval at which warning about
     *            blocked producers will be triggered.
     */
    public void setBlockedProducerWarningInterval(long blockedProducerWarningInterval) {
        destination.setBlockedProducerWarningInterval(blockedProducerWarningInterval);
    }

    /**
     * 
     * @return the interval at which warning about blocked producers will be
     *         triggered.
     */
    public long getBlockedProducerWarningInterval() {
        return destination.getBlockedProducerWarningInterval();
    }

    public int getMaxPageSize() {
        return destination.getMaxPageSize();
    }

    public void setMaxPageSize(int pageSize) {
        destination.setMaxPageSize(pageSize);
    }

    public boolean isUseCache() {
        return destination.isUseCache();
    }

    public void setUseCache(boolean value) {
        destination.setUseCache(value);
    }

    public ObjectName[] getSubscriptions() throws IOException, MalformedObjectNameException {
        List<Subscription> subscriptions = destination.getConsumers();
        ObjectName[] answer = new ObjectName[subscriptions.size()];
        ObjectName objectName = broker.getBrokerService().getBrokerObjectName();
        int index = 0;
        for (Subscription subscription : subscriptions) {
            String connectionClientId = subscription.getContext().getClientId();
            String objectNameStr = ManagedRegionBroker.getSubscriptionObjectName(subscription, connectionClientId, objectName);
            answer[index++] = new ObjectName(objectNameStr);
        }
        return answer;
    }

    public ObjectName getSlowConsumerStrategy() throws IOException, MalformedObjectNameException {
        ObjectName result = null;
        SlowConsumerStrategy strategy = destination.getSlowConsumerStrategy();
        if (strategy != null && strategy instanceof AbortSlowConsumerStrategy) {
            result = broker.registerSlowConsumerStrategy((AbortSlowConsumerStrategy)strategy);
        }
        return result;
    }

}

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