Question

我有一个routeContext，我正在尝试确定以下内容。如果JMSXDeliveryCount（消息属性）小于5，我想回滚。如果它大于5，我想记录一条消息并离开。

以下是我的routeContext：

<routeContext id="inbound-errorhandler-route" xmlns="http://camel.apache.org/schema/spring">
    <route id="errorhandler">
       <from uri="direct:inboundErrorHandler" id="errorHandlerDirect"/>
       <choice>
           <when>
               <simple>${exchangeProperty.JMSXDeliveryCount} >= 5</simple>
               <log message="Message retry attempts exhausted, retry count: {{exchangeProperty.JMSXDeliveryCount}}. Not rolling back: ${body}" loggingLevel="ERROR" logName="CamelContext-Route"/>
           </when>
           <otherwise>
               <log message="Caught Unknown Exception - Camel Context route processing - failed : ${body}"
                    loggingLevel="ERROR" logName="CamelContext-Route"/>
               <rollback message="The current message was marked for Rollback, retry count: {{exchangeProperty.JMSXDeliveryCount}}. Please see redelivery policy for re-attempts."/>
           </otherwise>
       </choice>
   </route> 
</routeContext>

但是，我永远不会输入第一个选项，并且在回滚的日志消息中，deliveryCount没有更新。它只是显示为纯文本{exchangeProperty.JMSXDeliveryCount}。

如何正确获取消息属性，特别是JMSXDeliveryCount，以及如何对该属性做出决定？

我正在使用Camel 2.15.2

Answer 1

要解决我使用纯文本的问题，我必须使用美元符号和括号来引用简单括号中的对象：

<simple>${header.JMSXDeliveryCount} >= 5 </simple>

我还需要使用头对象，而不是exchangeProperty来引用JMS传送计数。

<routeContext id="inbound-errorhandler-route" xmlns="http://camel.apache.org/schema/spring">
    <route id="errorhandler">
       <from uri="direct:inboundErrorHandler" id="errorHandlerDirect"/>
       <choice>
           <when>
               <simple>${header.JMSXDeliveryCount} >= 5</simple>
               <log message="Message retry attempts exhausted, retry count: ${header.JMSXDeliveryCount}. Not rolling back. Message body: ${body}" loggingLevel="ERROR" logName="CamelContext-Route"/>
           </when>
           <otherwise>
               <log message="Caught Unknown Exception - Camel Context route processing - failed, retry count: ${header.JMSXDeliveryCount}. Rolling back. Message body: ${body}"
                    loggingLevel="ERROR" logName="CamelContext-Route"/>
               <rollback message="The current message was marked for Rollback. Please see redelivery policy for re-attempts."/>
           </otherwise>
       </choice>
   </route> 
</routeContext>

在Camel Route中获取JMSXDeliveryCount

1 个答案: