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Thank you for this RFE.
On the 20th April we added a comment describing how this use case could be satisfied using technology that exists in the product today. We ask if this approach meets your needs and have not received any further comments detailing what would be needed above and beyond the solution we described. Correspondingly this requirement is being declined at this time. You have an opportunity to resubmit in twelve months time if you wish it to be considered then.
Thank you for the reply.
It would be useful to know how many distinct priorities you would expect to be used from a single z/OS Connect EE server?
If the number is relatively low (eg <10), then one approach to solving this problem with the config described would be to define an MQ connection for each distinct priority (eg MQConnHigh, MQConnMed, MQConnLow) and then use a policy to select which connectionRef to use for any given request based on the value of header on the request. This would also allow you to set a default connectionRef (and therefor priority) for each service in the case that the header is not provided.
More information about z/OS Connect EE policies can be found here:
https://www.ibm.com/docs/en/zosconnect/3.0?topic=apis-administering-zos-connect-ee-policies
Please let us know if this approach meets your needs.
Okay, it seems that I have overlooked this attribute, because I expected such a property in the MQ service definition. To me it doesn't appear like an ideal solution. The same queue may be used for a lot of different messages with different priorities. Our customers have lots of such queues - for instance queues used to trigger transactions in IMS, where the messages for the more important transactions are getting a higher priority, or queues used to send requests to long running batch applications, where heartbeat check / monitoring / config change messages have a very high priority and real business request messages have a priority depending on their importance respectively depending on the maximum allowable response time. That means if we need to use this attribute, we would need to have multiple definitions for the same queue with different priorities in the server.xml. It would be much better, if this could be defined with the MQ service. Ideally it could be also overwritten using the policy support. With that the same queue definition and the same service definition could be used even if there is a need to prioritize some service requests higher than usual.
Thank you for this RFE.
It is possible to set MQ message priority in z/OS Connect EE APIs today using the "priority" attribute of the properties.wmqJms sub-element within the jmsQueue element in server.xml:
https://www.ibm.com/support/knowledgecenter/SS7K4U_liberty/com.ibm.websphere.liberty.autogen.zos.doc/ae/rwlp_config_jmsQueue.html#properties.wmqJms
See the "properties.wmqJms" section.
Using this functionality you can set the priority of messages from z/OS Connect EE.
If this functionality does not satisfy the use case described in this RFE, it would be useful to understand what capability is required in addition to the functionality available in the product today.