windows activemq jdbc主从配置

activemq提供了四种配置方案来配置HA，详见https://www.cnblogs.com/hapjin/p/5663024.html，

我们本次使用Shared Database Master/Slave方式，操作系统为windows。

 

使用 jdbc 方式配置主从模式，持久化消息存放在数据库中。

在同一时刻，只有一个 master broker，master 接受客户端的连接，slave 不接受连接。
当 master 因为关机而下线后，其中一个 slave 会提升为 master，然后接受客户端连接。但原来 master 的非持久消息丢失了，而持久消息保存在数据库中。

 

activemq.xml配置，注释kahaDB，新增jdbcPersistenceAdapter，新增bean id="mysql-ds"。

jdbcPersistenceAdapter配置中，dataSource为新增的bean id

createTablesOnStartup表示启动时自动创建activemq需要的表，之后可以修改为false

useDatabaseLock设置为true是开启了独占模式，只有获取到锁的节点为master节点，其他都为slave节点，默认只有master节点提供服务，master节点挂掉，释放了锁之后，另外一个获取到锁的slave节点会升级为master节点。

数据源这里选用mysql，这里要注意的是，首先在数据库创建对应库、用户，然后需要将连接mysql所需jar包：mysql-connector-java-5.1.46.jar，commons-dbcp-1.4.jar，commons-pool-1.6.jar，commons-collections-3.2.2.jar，放到F:\worksoft\apache-activemq-5.15.4\lib下。

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<!-- START SNIPPET: example -->
<beans
  xmlns="http://www.springframework.org/schema/beans"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
  http://activemq.apache.org/schema/core http://activemq.apache.org/schema/core/activemq-core.xsd">

    <!-- Allows us to use system properties as variables in this configuration file -->
    <bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
        <property name="locations">
            <value>file:${activemq.conf}/credentials.properties</value>
        </property>
    </bean>

   <!-- Allows accessing the server log -->
    <bean id="logQuery" class="io.fabric8.insight.log.log4j.Log4jLogQuery"
          lazy-init="false" scope="singleton"
          init-method="start" destroy-method="stop">
    </bean>

    <!--
        The <broker> element is used to configure the ActiveMQ broker.
    -->
    <broker xmlns="http://activemq.apache.org/schema/core" brokerName="localhost" dataDirectory="${activemq.data}" useJmx="true">

        <destinationPolicy>
            <policyMap>
              <policyEntries>
                <policyEntry topic=">" >
                    <!-- The constantPendingMessageLimitStrategy is used to prevent
                         slow topic consumers to block producers and affect other consumers
                         by limiting the number of messages that are retained
                         For more information, see:

                         http://activemq.apache.org/slow-consumer-handling.html

                    -->
                  <pendingMessageLimitStrategy>
                    <constantPendingMessageLimitStrategy limit="1000"/>
                  </pendingMessageLimitStrategy>
                </policyEntry>
              </policyEntries>
            </policyMap>
        </destinationPolicy>


        <!--
            The managementContext is used to configure how ActiveMQ is exposed in
            JMX. By default, ActiveMQ uses the MBean server that is started by
            the JVM. For more information, see:

            http://activemq.apache.org/jmx.html
        -->
        <managementContext>
            <managementContext createConnector="true"/>
        </managementContext>

        <!--
            Configure message persistence for the broker. The default persistence
            mechanism is the KahaDB store (identified by the kahaDB tag).
            For more information, see:

            http://activemq.apache.org/persistence.html
        -->
        <persistenceAdapter>
        		<!--
            <kahaDB directory="${activemq.data}/kahadb"/>
            -->
            <jdbcPersistenceAdapter dataDirectory="${activemq.data}/mysqldb" dataSource="#mysql-ds" createTablesOnStartup="true" useDatabaseLock="true"/>
        </persistenceAdapter>


          <!--
            The systemUsage controls the maximum amount of space the broker will
            use before disabling caching and/or slowing down producers. For more information, see:
            http://activemq.apache.org/producer-flow-control.html
          -->
          <systemUsage>
            <systemUsage>
                <memoryUsage>
                    <memoryUsage percentOfJvmHeap="70" />
                </memoryUsage>
                <storeUsage>
                    <storeUsage limit="100 gb"/>
                </storeUsage>
                <tempUsage>
                    <tempUsage limit="50 gb"/>
                </tempUsage>
            </systemUsage>
        </systemUsage>

        <!--
            The transport connectors expose ActiveMQ over a given protocol to
            clients and other brokers. For more information, see:

            http://activemq.apache.org/configuring-transports.html
        -->
        <transportConnectors>
            <!-- DOS protection, limit concurrent connections to 1000 and frame size to 100MB -->
            <transportConnector name="openwire" uri="tcp://0.0.0.0:61616?maximumConnections=1000&amp;wireFormat.maxFrameSize=104857600"/>
            <transportConnector name="amqp" uri="amqp://0.0.0.0:5672?maximumConnections=1000&amp;wireFormat.maxFrameSize=104857600"/>
            <transportConnector name="stomp" uri="stomp://0.0.0.0:61613?maximumConnections=1000&amp;wireFormat.maxFrameSize=104857600"/>
            <transportConnector name="mqtt" uri="mqtt://0.0.0.0:1883?maximumConnections=1000&amp;wireFormat.maxFrameSize=104857600"/>
            <transportConnector name="ws" uri="ws://0.0.0.0:61614?maximumConnections=1000&amp;wireFormat.maxFrameSize=104857600"/>
        </transportConnectors>

        <!-- destroy the spring context on shutdown to stop jetty -->
        <shutdownHooks>
            <bean xmlns="http://www.springframework.org/schema/beans" class="org.apache.activemq.hooks.SpringContextHook" />
        </shutdownHooks>

    </broker>
    
    <!-- MySQL DataSource-->
    <bean id="mysql-ds" class="org.apache.commons.dbcp.BasicDataSource">
        <property name="driverClassName" value="com.mysql.jdbc.Driver"/>
        <property name="url" value="jdbc:mysql://127.0.0.1:3307/activemq?relaxAutoCommit=true"/>
        <property name="username" value="activemq"/>
        <property name="password" value="Activemq"/>
        <property name="poolPreparedStatements" value="true"/>
    </bean>

    <!--
        Enable web consoles, REST and Ajax APIs and demos
        The web consoles requires by default login, you can disable this in the jetty.xml file

        Take a look at ${ACTIVEMQ_HOME}/conf/jetty.xml for more details
    -->
    <import resource="jetty.xml"/>

</beans>
<!-- END SNIPPET: example -->

之后重启服务，数据库会自动生成对应表

客户端连接时配置修改为：

原连接串: tcp://192.168.1.104:61616

主备连接串: failover:(tcp://192.168.1.104:61616,tcp://192.168.1.105:61616)

参考：

https://blog.csdn.net/vtopqx/article/details/51649654

https://blog.csdn.net/qq_22543991/article/details/81389328