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Status Submitted
Categories Event Streams
Created by Guest
Created on Dec 11, 2024

Request/Reply pattern support in MQ connectors for Kafka Connect

The objective is to enable a traditional MQ Request/Reply pattern when flowing messages through both MQ queues and Kafka topics. 

app -----puts-message-with-ReplyQ-header----> MQ.QUEUE.REQUEST

MQ.QUEUE.REQUEST -----MQ-Source-Connector---> KAFKA.TOPIC.REQUEST

KAFKA.TOPIC.REQUEST -------consumed-by------> event processor app

event processor app ---produces-result-to---> KAFKA.TOPIC.RESPONSE

KAFKA.TOPIC.RESPONSE ---MQ-Sink-Connector---> MQ.QUEUE.RESPONSE

MQ.QUEUE.RESPONSE ----reply-retrieved-by----> app

 

The MQ Source Connector already has a mechanism for propagating MQMD properties such as ReplyQ to the Kafka message, so that it is available to the consuming event processor app in the Kafka message header. 

There isn't currently a way for the MQ Sink Connector to dynamically put messages retrieved from Kafka to different MQ queues. Currently, the Sink Connector can only be configured with a single destination queue (mq.queue), and creates a JMSProducer to put all messages to that queue.

The new feature required to enable the request/reply pattern outlined above is for the MQ Sink Connector to support putting messages to dynamic reply queues. 

Idea priority Low