我们有一个ActiveMQ / Camel配置,以前只使用消息队列和并发消费者。
但是,我们现在正在介绍消息主题,并发现 - 由于并发消费者 - 主题中收到的消息被消耗了多长时间。
此方案的正确配置是什么?
即,我们希望队列中收到的消息有多个并发消费者,但只有一个消费者为主题上收到的消息定义。
以下是当前配置:
<amq:connectionFactory id="amqConnectionFactory"
useAsyncSend="true" brokerURL="${${ptl.Servername}.jms.cluster.uri}"
userName="${jms.username}" password="${jms.password}" sendTimeout="1000"
optimizeAcknowledge="true" disableTimeStampsByDefault="true">
</amq:connectionFactory>
<bean id="cachingConnectionFactory"
class="org.springframework.jms.connection.CachingConnectionFactory">
<property name="targetConnectionFactory" ref="amqConnectionFactory"></property>
<property name="cacheConsumers" value="true"></property>
<property name="cacheProducers" value="true"></property>
<property name="reconnectOnException" value="true"></property>
<property name="sessionCacheSize" value="${jms.sessioncachesize}"></property>
</bean>
<bean id="jmsConfig" class="org.apache.camel.component.jms.JmsConfiguration">
<property name="connectionFactory" ref="cachingConnectionFactory" />
<property name="transacted" value="false" />
<property name="concurrentConsumers" value="${jms.concurrentConsumer}" />
<property name="maxConcurrentConsumers" value="${jms.max.concurrentConsumer}" />
<property name="preserveMessageQos" value="true" />
<property name="timeToLive" value="${jms.timeToLive}" />
</bean>
<bean id="activemq" class="org.apache.activemq.camel.component.ActiveMQComponent">
<property name="configuration" ref="jmsConfig" />
</bean>
答案 0 :(得分:3)
您可以为任何主题消费者明确地将concurrentConsumers / maxConcurrentConsumers设置为“1”。
from("activemq:topic:myTopic?concurrentConsumers=1&maxConcurrentConsumers=1")...
或者,将JmsConfiguration concurrent / maxConcurrentConsumers属性设置为“1”,然后根据需要显式启用队列的并发消耗。
from("activemq:queue:myQueue?maxConcurrentConsumers=5")...
另外,您可以使用Virtual Topics执行主题消息的并发消费而不会出现重复(强烈建议使用传统主题)
答案 1 :(得分:0)
我最终使用的解决方案是创建一个单独的jmsConfig / activeMQ配置块。
总的移民情况如下:
<!-- This is appropriate for consuming Queues, but not topics. For topics, use
jmsTopicConfig / activemqTopics -->
<bean id="jmsConfig" class="org.apache.camel.component.jms.JmsConfiguration">
<property name="connectionFactory" ref="cachingConnectionFactory" />
<property name="transacted" value="false" />
<property name="concurrentConsumers" value="${jms.concurrentConsumer}" />
<property name="maxConcurrentConsumers" value="${jms.max.concurrentConsumer}" />
<property name="preserveMessageQos" value="true" />
<property name="timeToLive" value="${jms.timeToLive}" />
</bean>
<bean id="activemq" class="org.apache.activemq.camel.component.ActiveMQComponent">
<property name="configuration" ref="jmsConfig" />
</bean>
<!-- This config limits to a single concurrent consumer. This config is appropriate for
consuming Topics, not Queues. -->
<bean id="jmsTopicConfig" class="org.apache.camel.component.jms.JmsConfiguration">
<property name="connectionFactory" ref="cachingConnectionFactory" />
<property name="transacted" value="false" />
<property name="concurrentConsumers" value="1" />
<property name="maxConcurrentConsumers" value="1" />
<property name="preserveMessageQos" value="true" />
<property name="timeToLive" value="${jms.timeToLive}" />
</bean>
<bean id="activemqTopics" class="org.apache.activemq.camel.component.ActiveMQComponent">
<property name="configuration" ref="jmsTopicConfig" />
</bean>
然后,在camel管道中,将主题从activemqTopics
bean中删除,如下所示:
<camel:route id="myTopicResponder">
<camel:from uri="activemqTopics:topic:stockQuotes?concurrentConsumers=1" />
<camel:to uri="bean:stockQuoteResponder?method=saveStockQuote"/>
</camel:route>