ActiveMQ example source code file (QueueMemoryFullMultiBrokersTest.java)

This example ActiveMQ source code file (QueueMemoryFullMultiBrokersTest.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

broker1, broker1, broker2, broker_count, brokerservice, brokerservice, countdownlatch, message_count, message_count, net, network, policyentry, queue, regionbroker, regionbroker, systemusage, threading, threads, util

The ActiveMQ QueueMemoryFullMultiBrokersTest.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.usecases;

import java.net.URI;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.TimeUnit;

import javax.jms.Destination;

import org.apache.activemq.JmsMultipleBrokersTestSupport;
import org.apache.activemq.broker.BrokerService;
import org.apache.activemq.broker.region.Queue;
import org.apache.activemq.broker.region.RegionBroker;
import org.apache.activemq.broker.region.policy.PolicyEntry;
import org.apache.activemq.broker.region.policy.PolicyMap;
import org.apache.activemq.broker.region.policy.VMPendingQueueMessageStoragePolicy;
import org.apache.activemq.command.ActiveMQDestination;
import org.apache.activemq.usage.SystemUsage;

public class QueueMemoryFullMultiBrokersTest extends JmsMultipleBrokersTestSupport {
    public static final int BROKER_COUNT = 2;
    public static final int MESSAGE_COUNT = 2000;
   
    public void testQueueNetworkWithConsumerFull() throws Exception {
        
        bridgeAllBrokers();
        startAllBrokers();

        Destination dest = createDestination("TEST.FOO", false);

        sendMessages("Broker1", dest, 50);

        CountDownLatch latch = new CountDownLatch(MESSAGE_COUNT);
        createConsumer("Broker2", dest, latch);
        assertConsumersConnect("Broker1", dest, 1, 30000);
        sendMessages("Broker1", dest, MESSAGE_COUNT - 50);

        // Wait for messages to be delivered
        assertTrue("Missing " + latch.getCount() + " messages", latch.await(45, TimeUnit.SECONDS));
        
        // verify stats, all messages acked
        BrokerService broker1 = brokers.get("Broker1").broker;
        RegionBroker regionBroker = (RegionBroker) broker1.getRegionBroker();
        // give the acks a chance to flow
        Thread.sleep(2000);
        Queue internalQueue = (Queue) regionBroker.getDestinations(ActiveMQDestination.transform(dest)).iterator().next(); 
        
        assertTrue("All messages are consumed and acked from source:" + internalQueue, internalQueue.getMessages().isEmpty());
        assertEquals("messages source:" + internalQueue, 0, internalQueue.getDestinationStatistics().getMessages().getCount());
        assertEquals("inflight source:" + internalQueue, 0, internalQueue.getDestinationStatistics().getInflight().getCount());
    }

    public void setUp() throws Exception {
        super.setAutoFail(true);
        super.setUp();
        messageSize = 1024;
        
        // Setup n brokers
        for (int i = 1; i <= BROKER_COUNT; i++) {
            createBroker(new URI("broker:()/Broker" + i + "?persistent=false&useJmx=false"));
        }
        BrokerService broker2 = brokers.get("Broker2").broker;
        applyMemoryLimitPolicy(broker2);
    }

    private void applyMemoryLimitPolicy(BrokerService broker) {
        final SystemUsage memoryManager = new SystemUsage();
        memoryManager.getMemoryUsage().setLimit(1024 * 50); // 50 MB
        broker.setSystemUsage(memoryManager);

        final List<PolicyEntry> policyEntries = new ArrayList();
        final PolicyEntry entry = new PolicyEntry();
        entry.setQueue(">");
        entry.setMemoryLimit(1024 * 4); // Set to 2 kb
        entry.setPendingQueuePolicy(new VMPendingQueueMessageStoragePolicy());
        policyEntries.add(entry);

        final PolicyMap policyMap = new PolicyMap();
        policyMap.setPolicyEntries(policyEntries);
        broker.setDestinationPolicy(policyMap);
        
    }
}