Why is the JMSXDeliveryCount property not available for topics or durable subscribers?
Article ID: KB0093827
Updated On:
| Products | Versions |
|---|---|
| TIBCO ActiveMatrix BusinessWorks | - |
| Not Applicable | - |
Description
Resolution:
This feature is not supported for topics. EMS is implemented based upon the JMS specification. In the JMS specification, the JMSXDeliveryCount property included in messages is used to record the number of message delivery attempts. In the EMS implementation, we keep only one copy of the message that is sent to a topic, even if there are many subscribers or durable subscribers. The delivery count is specific to a subscriber but we only have one message copy which means EMS cannot support JMSXDeliveryCount for topics.
This feature is not supported for topics. EMS is implemented based upon the JMS specification. In the JMS specification, the JMSXDeliveryCount property included in messages is used to record the number of message delivery attempts. In the EMS implementation, we keep only one copy of the message that is sent to a topic, even if there are many subscribers or durable subscribers. The delivery count is specific to a subscriber but we only have one message copy which means EMS cannot support JMSXDeliveryCount for topics.
Issue/Introduction
Why is the JMSXDeliveryCount property not available for topics or durable subscribers?
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