Answer: Ensuring Response is Sent to Sender from ESB Before Adding Message to JMS Queue

One way to ensure that a response is sent to the sender from the ESB before adding the message to a JMS queue is by implementing a synchronous communication pattern.

By using a synchronous communication pattern, the sender waits for the ESB to process the message and send back a response before proceeding to add the message to the JMS queue. This ensures that the sender receives confirmation of successful processing before the message is queued.

Additionally, error handling mechanisms can be put in place to handle scenarios where the response from the ESB is not received within a specified time frame. This will help prevent messages from getting lost or added to the queue without proper confirmation to the sender.

By following these practices, you can effectively guarantee that a response is sent to the sender from the ESB before the message is added to a JMS queue, ensuring reliable communication and message processing.