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我一直在尝试在我的骆驼上下文（骆驼 2.8）中配置一个 jms 端点（activemq 5.7），因此它应该在回滚时使用重新传递消息。不幸的是，它并没有像我预期的那样工作：它将消息返回到队列，但是消费者在之后立即接收消息，尽管指定了延迟参数。

我的配置如下：

...
<bean id="jmstx" class="org.apache.activemq.camel.component.ActiveMQComponent"> 
    <property name="configuration" ref="jmsTxConfig" /> 
</bean> 

<bean id="jmsTxConfig" class="org.apache.camel.component.jms.JmsConfiguration"> 
    <property name="connectionFactory" ref="jmsXaPoolConnectionFactory"/> 
    <property name="transactionManager" ref="osgiPlatformTransactionManager"/>
    <property name="transacted" value="false"/>
    <property name="cacheLevelName" value="CACHE_NONE"/>
    <property name="concurrentConsumers" value="${jms.concurrentConsumers}" />
</bean> 

<bean id="jmsXaPoolConnectionFactory" class="org.apache.activemq.pool.XaPooledConnectionFactory">
    <property name="maxConnections" value="${jms.maxConnections}" />
    <property name="connectionFactory" ref="jmsXaConnectionFactory" />
    <property name="transactionManager" ref="osgiJtaTransactionManager" />
</bean>

<bean id="jmsXaConnectionFactory" class="org.apache.activemq.ActiveMQXAConnectionFactory">
    <property name="brokerURL" value="${jms.broker.url}"/>
    <property name="redeliveryPolicy">
        <bean class="org.apache.activemq.RedeliveryPolicy">
            <property name="maximumRedeliveries" value="-1"/>
            <property name="initialRedeliveryDelay" value="2000" />
            <property name="redeliveryDelay" value="5000" />
        </bean>
    </property>
</bean>

一个小示例演示了我如何使用端点：

    <route id="main-route">
        <from uri="jmstx:queue:my-queue" />
        <to uri="direct:subroute" />
        ...
        <!-- some logic -->
    </route>

    <route id="subroute">
        <from uri="direct:subroute" />
        <transacted ref="PROPAGATION_MANDATORY"/>
        ...
        <!-- Rollback on some condition -->
        <rollback/>
        ...
    </route>

有谁知道为什么会这样？谢谢你。

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1 回答 1

0

Yes, I encountered same problem. After hacking the ActiveMQ source code, and adding some logging information, I found some evidences and googled the solution.

Just like the answer said: https://developer.jboss.org/thread/266172 After setting cacheLevel to CACHE_CONSUMER on the activemq component, solved the problem.

ex:

<bean id="jmsConfig" class="org.apache.camel.component.jms.JmsConfiguration"> 
  <property name="connectionFactory" ref="jmsPooledConnectionFactory" />
  <property name="concurrentConsumers" value="1"/> 
  <property name="transacted" value="true"/>
  <property name="cacheLevelName" value="CACHE_CONSUMER"/>
  <property name="acknowledgementModeName" value="SESSION_TRANSACTED"/>
</bean>
于 2017-05-27T14:53:29.153 回答