ActiveMQ的activemq.xml详细配置讲解

 <beans
   xmlns="http://www.springframework.org/schema/beans"
   xmlns:amq="http://activemq.org/config/1.0"
   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.org/config/1.0 http://activemq.apache.org/schema/activemq-core.xsd
   http://activemq.apache.org/camel/schema/spring>

   <!-- persistent="true"表示要持久化存储消息，和子元素persistenceAdapter结合使用 -->
   <!-- dataDirectory默认的存储持久化数据的目录 -->
   <!-- brokerName 设置broker的name，在注意在网络上必须是唯一的-->
   <!-- 更多参考http://activemq.apache.org/xbean-xml-reference-50.html#XBeanXMLReference5.0-brokerelement -->
   <broker xmlns="http://activemq.org/config/1.0" brokerName="192.168.1.148" persistent ="true" dataDirectory="${activemq.base}/data" useShutdownHook="false">

     <!-- Destination specific policies using destination names or wildcards -->
     <!-- wildcards意义见http://activemq.apache.org/wildcards.html -->
     <destinationPolicy>
       <policyMap>
         <policyEntries>
        <!-- 这里使用了wildcards，表示所有以EUCITA开头的topic -->
           <policyEntry topic="EUCITA.>" producerFlowControl="false" memoryLimit="10mb">
             <!-- 分发策略 -->
         <dispatchPolicy>
           <!-- 按顺序分发 -->
               <strictOrderDispatchPolicy/>
             </dispatchPolicy>
         <!--  恢复策略-->
             <subscriptionRecoveryPolicy>
           <!-- 只恢复最后一个message -->
               <lastImageSubscriptionRecoveryPolicy/>
             </subscriptionRecoveryPolicy>
           </policyEntry>
         </policyEntries>
       </policyMap>
     </destinationPolicy>

     <!-- The transport connectors ActiveMQ will listen to -->
     <transportConnectors>
        <transportConnector name="openwire" uri="tcp://192.168.1.148:61616" discoveryUri="multicast://default"/>
        <transportConnector name="ssl"     uri="ssl://192.168.1.148:61617"/>
        <transportConnector name="stomp"   uri="stomp://192.168.1.148:61613"/>
        <transportConnector name="xmpp"    uri="xmpp://192.168.1.148:61222"/>
     </transportConnectors>

     <!-- 消息持久化方式 -->
     <persistenceAdapter>
       <amqPersistenceAdapter directory="${activemq.base}/data"/>
     </persistenceAdapter>
 </broker>

   <!-- lets create a command agent to respond to message based admin commands on the ActiveMQ.Agent topic -->
     <commandAgent xmlns="http://activemq.org/config/1.0"/>

   <!-- 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" />
     </handlers>
   </jetty>
 </beans>

<beans
xmlns="http://www.springframework.org/schema/beans"
xmlns:amq="http://activemq.org/config/1.0"
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.org/config/1.0 http://activemq.apache.org/schema/activemq-core.xsd
http://activemq.apache.org/camel/schema/spring>
<!-- persistent="true"表示要持久化存储消息，和子元素persistenceAdapter结合使用 -->
<!-- dataDirectory默认的存储持久化数据的目录 -->
<!-- brokerName 设置broker的name，在注意在网络上必须是唯一的-->
<!-- 更多参考http://activemq.apache.org/xbean-xml-reference-50.html#XBeanXMLReference5.0-brokerelement -->
<broker xmlns="http://activemq.org/config/1.0" brokerName="192.168.1.148" persistent ="true" dataDirectory="${activemq.base}/data" useShutdownHook="false">
<!-- Destination specific policies using destination names or wildcards -->
<!-- wildcards意义见http://activemq.apache.org/wildcards.html -->
<destinationPolicy>
<policyMap>
<policyEntries>
<!-- 这里使用了wildcards，表示所有以EUCITA开头的topic -->
<policyEntry topic="EUCITA.>" producerFlowControl="false" memoryLimit="10mb">
<!-- 分发策略 -->
<dispatchPolicy>
<!-- 按顺序分发 -->
<strictOrderDispatchPolicy/>
</dispatchPolicy>
<!--  恢复策略-->
<subscriptionRecoveryPolicy>
<!-- 只恢复最后一个message -->
<lastImageSubscriptionRecoveryPolicy/>
</subscriptionRecoveryPolicy>
</policyEntry>
</policyEntries>
</policyMap>
</destinationPolicy>
<!-- The transport connectors ActiveMQ will listen to -->
<transportConnectors>
<transportConnector name="openwire" uri="tcp://192.168.1.148:61616" discoveryUri="multicast://default"/>
<transportConnector name="ssl"     uri="ssl://192.168.1.148:61617"/>
<transportConnector name="stomp"   uri="stomp://192.168.1.148:61613"/>
<transportConnector name="xmpp"    uri="xmpp://192.168.1.148:61222"/>
</transportConnectors>
<!-- 消息持久化方式 -->
<persistenceAdapter>
<amqPersistenceAdapter directory="${activemq.base}/data"/>
</persistenceAdapter>
</broker>
<!-- lets create a command agent to respond to message based admin commands on the ActiveMQ.Agent topic -->
<commandAgent xmlns="http://activemq.org/config/1.0"/>
<!-- 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" />
</handlers>
</jetty>
</beans>

注释

关于XML配置中元素的具体信息可以参考http://activemq.apache.org/xbean-xml-reference-50.html 下面介绍本篇配置使用的一些重要元素。

DispathPolicy

ActiveMQ支持3中不同的分发策略（避免翻译了以后误解，这里用原文）：

1. <roundRobinDispatchPolicy>：Simple dispatch policy that sends a message to every subscription that matches the message.
2. <simpleDispatchPolicy>：Simple dispatch policy that sends a message to every subscription that matches the message.
3. <strictOrderDispatchPolicy>：Dispatch policy that causes every subscription to see messages in the same order.

SubscriptionRecoveryPolicy

ActiveMQ支持6种恢复策略，可以自行选择使用不同的策略

1. <fixedCountSubscriptionRecoveryPolicy>： keep a fixed count of last messages.
2. <fixedSizedSubscriptionRecoveryPolicy>： keep a fixed amount of memory available in RAM for message history which is evicted in time order.
3. <lastImageSubscriptionRecoveryPolicy>：only keep the last message.
4. <noSubscriptionRecoveryPolicy>：disable recovery of messages.
5. <queryBasedSubscriptionRecoveryPolicy>：perform a user specific query mechanism to load any messages they may have missed.
6. <timedSubscriptionRecoveryPolicy>：keep a timed buffer of messages around in memory and use that to recover new subscriptions.