activemq持久化配置，设置为主从模式（带复制的主从模式，应用mysql数据库）

配置文件如下
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<!-- START SNIPPET: example -->
<beans
xmlns="http://www.springframework.org/schema/beans"
xmlns:amq="http://activemq.apache.org/schema/core"
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-2.0.xsd
http://activemq.apache.org/schema/core http://activemq.apache.org/schema/core/activemq-core.xsd   
http://activemq.apache.org/camel/schema/spring http://activemq.apache.org/camel/schema/spring/camel-spring.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.base}/conf/credentials.properties</value>
         </property>      
    </bean>
<!-- 下面红色字体是为了支持带数据库的主从模式集群的配置，被注释的蓝色字体是系统默认配置，单个activemq是用默认的. -->
    <broker xmlns="http://activemq.org/config/1.0"brokerName="JdbcMasterBroker"persistent="true"useShutdownHook="false">

<!--<broker xmlns="http://activemq.apache.org/schema/core"brokerName="localhost"dataDirectory="${activemq.base}/data"> -->
    
        <!-- Destination specific policies using destination names or wildcards -->
        <destinationPolicy>
            <policyMap>
                <policyEntries>
                    <policyEntry queue=">"memoryLimit="5mb"/>
                    <policyEntry topic=">"memoryLimit="5mb">
                      <!-- you can add other policies too such as these
                        <dispatchPolicy>
                            <strictOrderDispatchPolicy/>
                        </dispatchPolicy>
                        <subscriptionRecoveryPolicy>
                            <lastImageSubscriptionRecoveryPolicy/>
                        </subscriptionRecoveryPolicy>
                      -->
                    </policyEntry>
                </policyEntries>
            </policyMap>
        </destinationPolicy>

<!-- Use the following to configure how ActiveMQ is exposed in JMX -->
        <managementContext>
            <managementContext createConnector="false"/>
        </managementContext>

<!-- The store and forward broker networks ActiveMQ will listen to -->
   <networkConnectors>
            <!-- by default just auto discover the other brokers -->
   <!--         <networkConnector name="default-nc"uri="multicast://default"/> -->
            <!-- Example of a static configuration:-->
          <!-- <networkConnector uri="static://(tcp://localhost:61616,tcp://192.168.2.136:61616)"/>-->

</networkConnectors>
<!-- 下面的配置是和上面的“persistnet＝true”相配合使用的。--> 
     <persistenceAdapter>
            <amqPersistenceAdapter syncOnWrite="false"directory="${activemq.base}/data"maxFileLength="20 mb"/>
        </persistenceAdapter>

<!-- Use the following if you wish to configure the journal with JDBC -->
        <!--
        <persistenceAdapter>
            <journaledJDBC dataDirectory="${activemq.base}/data"dataSource="#postgres-ds"/>
        </persistenceAdapter>
        -->

<!-- Or if you want to use pure JDBC without a journal -->
<persistenceAdapter>
<jdbcPersistenceAdapter dataSource="#mysql-ds"/>
</persistenceAdapter>
        <!--
        <persistenceAdapter>
            <jdbcPersistenceAdapter dataSource="#postgres-ds"/>
        </persistenceAdapter>
        -->

<sslContext>
            <sslContext keyStore="file:${activemq.base}/conf/broker.ks"keyStorePassword="password"trustStore="file:${activemq.base}/conf/broker.ts"trustStorePassword="password"/>
        </sslContext>
        
        <!-- The maximum about of space the broker will use before slowing down producers -->
        <systemUsage>
            <systemUsage>
                <memoryUsage>
                    <memoryUsage limit="20 mb"/>
                </memoryUsage>
                <storeUsage>
                    <storeUsage limit="1 gb"name="foo"/>
                </storeUsage>
                <tempUsage>
                    <tempUsage limit="100 mb"/>
                </tempUsage>
            </systemUsage>
        </systemUsage>

<!-- The transport connectors ActiveMQ will listen to -->
        <transportConnectors>
            <transportConnector name="openwire"uri="tcp://localhost:61616" 
discoveryUri="multicast://default"/>
            <transportConnector name="ssl"uri="ssl://localhost:61617"/>
            <transportConnector name="stomp"uri="stomp://localhost:61613"/>
            <transportConnector name="xmpp"uri="xmpp://localhost:61222"/>
        </transportConnectors>

</broker>

<!--
    ** Lets deploy some Enterprise Integration Patterns inside the ActiveMQ Message Broker
    ** For more details see
    **
    ** http://activemq.apache.org/enterprise-integration-patterns.html
    -->
    <camelContext id="camel"xmlns="http://activemq.apache.org/camel/schema/spring">

<!-- You can use a <package> element for each root package to search for Java routes -->
        <package>org.foo.bar</package>

<!-- You can use Spring XML syntax to define the routes here using the <route> element -->
        <route>
            <from uri="activemq:example.A"/>
            <to uri="activemq:example.B"/>
        </route>
    </camelContext>

<!--
    ** Lets configure some Camel endpoints
    **
    ** http://activemq.apache.org/camel/components.html
    -->

<!-- configure the camel activemq component to use the current broker -->
    <bean id="activemq"class="org.apache.activemq.camel.component.ActiveMQComponent">
        <property name="connectionFactory">
          <bean class="org.apache.activemq.ActiveMQConnectionFactory">
            <property name="brokerURL"value="vm://localhost?create=false&amp;waitForStart=10000"/>
            <property name="userName"value="${activemq.username}"/>
            <property name="password"value="${activemq.password}"/>
          </bean>
        </property>
    </bean>

<!-- Uncomment to create a command agent to respond to message based admin commands on the ActiveMQ.Agent topic -->
    <!--
    <commandAgent xmlns="http://activemq.apache.org/schema/core"brokerUrl="vm://localhost"username="${activemq.username}"password="${activemq.password}"/>
    -->

<!-- An embedded servlet engine for serving up the Admin console -->
    <jetty xmlns="http://mortbay.com/schemas/jetty/1.0">
        <connectors>
            <nioConnector port="8161"/>
        </connectors>

<handlers>
            <webAppContext contextPath="/admin"resourceBase="${activemq.base}/webapps/admin"logUrlOnStart="true"/>
            <webAppContext contextPath="/demo"resourceBase="${activemq.base}/webapps/demo"logUrlOnStart="true"/>
            <webAppContext contextPath="/fileserver"resourceBase="${activemq.base}/webapps/fileserver"logUrlOnStart="true"/>
        </handlers>
    </jetty>

<!-- This xbean configuration file supports all the standard spring xml configuration options -->

<!-- Postgres DataSource Sample Setup -->
    <!--
    <bean id="postgres-ds"class="org.postgresql.ds.PGPoolingDataSource">
      <property name="serverName"value="localhost"/>
      <property name="databaseName"value="activemq"/>
      <property name="portNumber"value="0"/>
      <property name="user"value="activemq"/>
      <property name="password"value="activemq"/>
      <property name="dataSourceName"value="postgres"/>
      <property name="initialConnections"value="1"/>
      <property name="maxConnections"value="10"/>
    </bean>
    -->

<!-- MySql DataSource Sample Setup -->
    
    <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://192.168.2.136:3306/activemq?relaxAutoCommit=true"/>
      <property name="username"value="app"/>
      <property name="password"value="app"/>
      <property name="maxActive"value="200"/>
      <property name="poolPreparedStatements"value="true"/>
    </bean>

<!-- Oracle DataSource Sample Setup -->
    <!--
    <bean id="oracle-ds"class="org.apache.commons.dbcp.BasicDataSource"destroy-method="close">
      <property name="driverClassName"value="oracle.jdbc.driver.OracleDriver"/>
      <property name="url"value="jdbc:oracle:thin:@localhost:1521:AMQDB"/>
      <property name="username"value="scott"/>
      <property name="password"value="tiger"/>
      <property name="maxActive"value="200"/>
      <property name="poolPreparedStatements"value="true"/>
    </bean>
    -->

<!-- Embedded Derby DataSource Sample Setup -->
    <!--
    <bean id="derby-ds"class="org.apache.derby.jdbc.EmbeddedDataSource">
      <property name="databaseName"value="derbydb"/>
      <property name="createDatabase"value="create"/>
    </bean>
    -->

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

已主从模式运行（192.168.2.137为主，192.168.2.136为从），还需在客户端上运行如下命令：
java.naming.provider.url=failover:(tcp://192.168.2.137:61616,tcp://192.168.2.136:61616)?
randomize=false                          ＃没有这一行的话，就变成了networks of brokers
initialReconnectDelay=10            ＃这里的单位是毫秒

activemq的目录里有个example，只要简单配置一下build.xml，即可测试activemq的message的consume和query
<project name="Inbox"default="help"basedir=".">

<property name="class.dir"value="target/classes"/>
    <property name="activemq.home"value=".."/>
<!-- 作为消息consume的使用本地地址，作为消息query的使用consumer的ip地址 -->
    <!-- example program defaults -->
    <property name="url"value="tcp://localhost:61616"/>