Inter-process communication (Message Queue)

1. All processes share one message queue group.

2. The message queue group contains a sending message queue and a receiving message queue.

3. The request process actively sends messages to the sending queue and receives messages from the receiving queue. The processing process reads the request from the sending message queue and sends the processing result to the receiving queue.

4. The same process group is the same process.

5. process all processes in the Process Group to read requests from the message queue in a competitive manner.

5. The function to be implemented is to send messages to the Process Group for processing results. From the perspective of the Process sending the request, you only need to know the process group to which the request is sent. From the perspective of the receiving process, you need to know which process the request is sent to accurately return the request results.