What methods can be used to organize message passing between system components?

In Go, message passing between system components can be organized in several ways:

• Channels — the primary and idiomatic way to exchange data between goroutines. Channels allow safe transmission of values, providing synchronization.

ch := make(chan string)

// Sending
go func() {
    ch <- "message"
}()

// Receiving
msg := <-ch
fmt.Println(msg)

• Shared structures with mutexes (sync.Mutex) — for concurrent access to data when sharing state.

• Message queues (e.g., RabbitMQ, Kafka) — for communication between different services or processes.

• HTTP/gRPC calls — for communication between components over the network.

The choice of method depends on the architecture and system requirements.