activemq+zookeeper 集群

1. 建立 zookeeper 集群，不详细描述，请自行度娘
2. 建立 activemq 集群，集群要求最少3个节点

修改 activemq.xml 配置文件

<broker xmlns="http://activemq.apache.org/schema/core" brokerName="zk_cluster_nodes" dataDirectory="${activemq.data}" schedulerSupport="true">

该配置的 brokerName 必须一致。

将如下配置

<persistenceAdapter>
    <kahaDB directory="${activemq.base}/data/kahadb" />
</persistenceAdapter>

改成：

        <persistenceAdapter>
            <replicatedLevelDB     
             directory="${activemq.data}/leveldb"    
             replicas="3"    
             bind="tcp://0.0.0.0:0"    
             zkAddress="192.168.1.2:2181,192.168.1.3:2181,192.168.1.4:2181"    
             zkPassword=""    
             hostname="192.168.10.2"  
             sync="local_disk"  
             zkPath="/activemq/leveldb-stores"   
             />
        </persistenceAdapter>

依次启动3个节点，若出现错误：

 INFO | No IOExceptionHandler registered, ignoring IO exception
java.io.IOException: com.google.common.base.Objects.firstNonNull(Ljava/lang/Object;Ljava/lang/Object;)Ljava/lang/Object;
    at org.apache.activemq.util.IOExceptionSupport.create(IOExceptionSupport.java:39)[activemq-client-5.10.0.jar:5.10.0]
    at org.apache.activemq.leveldb.LevelDBClient.might_fail(LevelDBClient.scala:552)[activemq-leveldb-store-5.10.0.jar:5.10.0]
    at org.apache.activemq.leveldb.LevelDBClient.replay_init(LevelDBClient.scala:657)[activemq-leveldb-store-5.10.0.jar:5.10.0]
    at org.apache.activemq.leveldb.LevelDBClient.start(LevelDBClient.scala:558)[activemq-leveldb-store-5.10.0.jar:5.10.0]
    at org.apache.activemq.leveldb.DBManager.start(DBManager.scala:648)[activemq-leveldb-store-5.10.0.jar:5.10.0]
    at org.apache.activemq.leveldb.LevelDBStore.doStart(LevelDBStore.scala:235)[activemq-leveldb-store-5.10.0.jar:5.10.0]
    at org.apache.activemq.leveldb.replicated.MasterLevelDBStore.doStart(MasterLevelDBStore.scala:110)[activemq-leveldb-store-5.10.0.jar:5.10.0]
    at org.apache.activemq.util.ServiceSupport.start(ServiceSupport.java:55)[activemq-client-5.10.0.jar:5.10.0]
    at org.apache.activemq.leveldb.replicated.ElectingLevelDBStore$$anonfun$start_master$1.apply$mcV$sp(ElectingLevelDBStore.scala:226)[activemq-leveldb-store-5.10.0.jar:5.10.0]
    at org.fusesource.hawtdispatch.package$$anon$4.run(hawtdispatch.scala:330)[hawtdispatch-scala-2.11-1.21.jar:1.21]
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)[:1.7.0_79]
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)[:1.7.0_79]
    at java.lang.Thread.run(Thread.java:745)[:1.7.0_79]
 INFO | Stopped LevelDB[/home/local/activemq-5.10.0-3/data/leveldb]

先删除 activemq 中 lib 目录下 pax-url-aether-1.5.2.jar 文件，并将 activemq.xml 中该配置注释

    <bean id="logQuery" class="org.fusesource.insight.log.log4j.Log4jLogQuery"
          lazy-init="false" scope="singleton"
          init-method="start" destroy-method="stop">
    </bean>

3. 配置 spring

    <bean id="connectionFactory" class="org.apache.activemq.ActiveMQConnectionFactory">
        <property name="brokerURL" value="failover:(tcp://192.168.1.2:61616,tcp://192.168.1.3:61626,tcp://192.168.1.4:61636)"></property>
        <property name="redeliveryPolicy">
            <bean id="redeliveryPolicy" class="org.apache.activemq.RedeliveryPolicy">
                <property name="maximumRedeliveries" value="5"/>
                <property name="initialRedeliveryDelay" value="100"/>
            </bean>
        </property>
    </bean>

    <bean id="jmsTemplate" class="org.springframework.jms.core.JmsTemplate">
        <property name="connectionFactory" ref="connectionFactory"/>
        <property name="pubSubDomain" value="false"/>
    </bean>

4. 测试发送消息

        ApplicationContext app = new ClassPathXmlApplicationContext("broker.xml");
        String queueName = "UUU9";
        final String message = "bbbb";
        JmsTemplate jmsTemplate = app.getBean(JmsTemplate.class);
        jmsTemplate.setDeliveryMode(1);
        for (int i = 0; i < 10; i++) {
            jmsTemplate.send(queueName, new MessageCreator() {

                public Message createMessage(Session session) throws JMSException {
                    TextMessage textMessage = session.createTextMessage(message);
                    textMessage.setLongProperty(ScheduledMessage.AMQ_SCHEDULED_DELAY, 6000L);
                    return textMessage;
                }
            });

            Thread.sleep(200L);
        }

 

而后，在浏览器地址栏里输入：

http://192.168.1.2:8161/admin/queues.jsp

http://192.168.1.3:8161/admin/queues.jsp

http://192.168.1.4:8161/admin/queues.jsp

由于使用zookeeper作负载均衡，三台只有一台是master，其余两台处于等待状态，因此只有其中一台提供服务，但一旦这台服务器宕机之后，会有另一台顶替上来，因此其余几个ip地址是打不开的，只有一台能打开