三，activemq持久化消息到mysql数据库中

1，将activemq的服务端的的配置放到myeclipse新建的程序中，如下图

2， 默认情况下Activemq使用KahaDB存储，注解掉KahaDB配置，改为mysql配置

　　找到activemq.xml修改如下  

　　　<persistenceAdapter>
         <jdbcPersistenceAdapter dataDirectory="${activemq.data}" dataSource="#mysql-ds">
         </jdbcPersistenceAdapter>
      　</persistenceAdapter>　　

    该配置表示，我们将要使用名称为“mysql-ds”bean的id作为mysql数据源

　　

3. 配置MySql数据源

      在</broker>节点后面，增加MySQL数据源配置：

       <bean id="mysql-ds" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
     <property name="driverClassName" value="com.mysql.jdbc.Driver"/>
     <property name="url" value="jdbc:mysql://127.0.0.1/activemq?relaxAutoCommit=true"/>
     <property name="username" value="admin"/>
     <property name="password" value="admin"/>
     <property name="maxActive" value="200"/>
     <property name="poolPreparedStatements" value="true"/>
   </bean>

　（注意该配置和spring的配置类似 id应该与持久化的dataSource保持一致）

4，添加mysql的驱动包到lib目录中

5，整体配置如下：

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

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

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

        <managementContext>
            <managementContext createConnector="false"/>
        </managementContext>

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

      <persistenceAdapter>
         <jdbcPersistenceAdapter dataDirectory="${activemq.data}" dataSource="#mysql-ds">
         </jdbcPersistenceAdapter>
      </persistenceAdapter>
            <systemUsage>
            <systemUsage>
                <memoryUsage>
                    <memoryUsage percentOfJvmHeap="70" />
                </memoryUsage>
                <storeUsage>
                    <storeUsage limit="100 gb"/>
                </storeUsage>
                <tempUsage>
                    <tempUsage limit="50 gb"/>
                </tempUsage>
            </systemUsage>
        </systemUsage>

        <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>
   <bean id="mysql-ds" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
     <property name="driverClassName" value="com.mysql.jdbc.Driver"/>
     <property name="url" value="jdbc:mysql://127.0.0.1/activemq?relaxAutoCommit=true"/>
     <property name="username" value="admin"/>
     <property name="password" value="admin"/>
     <property name="maxActive" value="200"/>
     <property name="poolPreparedStatements" value="true"/>
   </bean>
    <import resource="jetty.xml"/>

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

6,启动activemq

在Run configrations中点击Java application反键新建在main class中输入org.apache.activemq.console.Main这个类，这是activemq的启动类

配置arguments，里面输入start，最后运行即可

7，启动成功后，我们会在数据库中看到这activemq_acks  ，activemq_lock  ，activemq_msgs（持久化消息表)三张表