问题
I am sending messages to IBM MQ using Nifi PublishJMS processor. The Messages have Persistence = Persistent in MQ. I want to change it to Non-Persistent. Is there a property in Nifi PublishJms processor to correct this? Or is it done from the MQ side. I don't have access to MQ servers, I can only check the messages being delivered to the queue.
回答1:
At a low level a MQ client applications can specify the following persistence values:
MQPER_PERSISTENCE_AS_PARENT(Use the value of the next topic above this one)MQPER_NOT_PERSISTENT(self-explanatory)MQPER_PERSISTENT(self-explanatory)MQPER_PERSISTENCE_AS_TOPIC_DEF(Use the value of this topic, the default on a topic is ASPARENT so this works likeMQPER_PERSISTENCE_AS_PARENTwhere defaults are in use)
If nothing is specified then MQPER_PERSISTENCE_AS_TOPIC_DEF is the default.
Within the JMS API you can override this using a URI property as follows:
queue:///theQueueName?persistence=1
Property persistence and all URI properties are documented in the IBM MQ v8 Knowledge center page "Creating destinations in a JMS application".
Property name: persistence
-2- As specified on the send() call or, if not specified on the send() call, the default persistence of the message producer.-1- As specified by the DefPersistence attribute of the IBM MQ queue or topic.1- Nonpersistent.2- Persistent.3- Equivalent to the value HIGH for the PERSISTENCE property as used in the IBM MQ JMS administration tool. For an explanation of this value, see JMS persistent messages.
来源：https://stackoverflow.com/questions/50333116/is-there-a-way-to-change-the-delivery-mode-in-publishjms-processor-in-nifi