ActiveMQ使用MySQL進行消息持久化

 使用MySQL進行ActiveMQ的消息持久化，並設置主從模式

1、MySQL數據庫的binlog日誌模式要設置爲 mixed 模式

2、設置使用數據庫鎖 useDatabaseLock="true" ，如果不設置，在主從模式下會報主鍵重複的異常。

<persistenceAdapter>
   <jdbcPersistenceAdapter dataDirectory="${activemq.data}" dataSource="#mysql-ds" useDatabaseLock="true"
lockKeepAlivePeriod="10000"/>
</persistenceAdapter>

3、使用數據庫鎖的時候，master啓動後，slave由於數據庫鎖的原因，啓動時處於等待狀態，這時slave無法提供服務，當master當機後，數據庫鎖釋放，slave獲得數據庫鎖，可以提供服務。

4、雖然設置的主從模式，但當master當機時，接收者會有數據丟失問題，而且問題比較嚴重。考慮可能是由於沒有 Journal 的原因，但不知道爲什麼ActiveMQ 5.0以後版本不支持 journaledJDBC ，也可能是沒有找到正確的設置方法。（原因是在消息發送端設置了異步發送，導致發送和接收的消息數不一致，修改爲同步發送後，消息不丟失，發送和接收的消息數一致）

ActiveMQ使用MySQL進行持久化，並配置Master-Slave模式配置樣例：

Master:

<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">

  <bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
      <property name="locations">
          <value>file:${activemq.conf}/credentials.properties</value>
      </property>
  </bean>

  <broker brokerName="broker-1-1" persistent="true" xmlns="http://activemq.apache.org/schema/core">

    <transportConnectors>
       <transportConnector name="default" uri="tcp://0.0.0.0:61616"/>
    </transportConnectors>

    <persistenceAdapter>
       <jdbcPersistenceAdapter dataDirectory="${activemq.data}" dataSource="#mysql-ds" useDatabaseLock="true"
       lockKeepAlivePeriod="10000"/>
    </persistenceAdapter>

    <systemUsage>
        <systemUsage sendFailIfNoSpaceAfterTimeout="3000">
            <memoryUsage>
                <memoryUsage limit="20 mb"/>
            </memoryUsage>
            <storeUsage>
                <storeUsage limit="100 mb"/>
            </storeUsage>
            <tempUsage>
                <tempUsage limit="50 mb"/>
            </tempUsage>
        </systemUsage>
    </systemUsage>

    <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://127.0.0.1:3306/activemq?relaxAutoCommit=true&amp;useUnicode=true&amp;characterEncoding=UTF-8"/>
    <property name="username" value="root"/>
    <property name="password" value="neusoft"/>
    <property name="maxActive" value="200"/>
    <property name="poolPreparedStatements" value="true"/>
  </bean>

  <import resource="jetty.xml"/>
</beans>

 

Slave:

<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">

  <bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
      <property name="locations">
          <value>file:${activemq.conf}/credentials.properties</value>
      </property>
  </bean>

  <broker brokerName="broker-1-2" persistent="true"
  masterConnectorURI="tcp://127.0.0.1:61616" shutdownOnMasterFailure="false" xmlns="http://activemq.apache.org/schema/core">
    <transportConnectors>
       <transportConnector name="default" uri="tcp://0.0.0.0:61617"/>
    </transportConnectors>

    <persistenceAdapter>
       <jdbcPersistenceAdapter dataDirectory="${activemq.data}" dataSource="#mysql-ds" useDatabaseLock="true"
       lockKeepAlivePeriod="10000"/>
    </persistenceAdapter>

    <systemUsage>
        <systemUsage sendFailIfNoSpaceAfterTimeout="3000">
            <memoryUsage>
                <memoryUsage limit="20 mb"/>
            </memoryUsage>
            <storeUsage>
                <storeUsage limit="100 mb"/>
            </storeUsage>
            <tempUsage>
                <tempUsage limit="50 mb"/>
            </tempUsage>
        </systemUsage>
    </systemUsage>

    <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://127.0.0.1:3306/activemq?relaxAutoCommit=true&amp;useUnicode=true&amp;characterEncoding=UTF-8"/>
    <property name="username" value="root"/>
    <property name="password" value="neusoft"/>
    <property name="maxActive" value="200"/>
    <property name="poolPreparedStatements" value="true"/>
  </bean>

  <import resource="jetty.xml"/>

</beans>