How do I commit offsets safely in NATS using Go?

Committing offsets in NATS safely using Go is essential for ensuring message delivery and processing integrity. When dealing with NATS, you generally want to implement acknowledgment mechanisms to manage and confirm message consumption effectively.

Here’s a basic example of how to handle message acknowledgments and safely commit offsets using the NATS Go client:

package main import ( "fmt" "github.com/nats-io/nats.go" "log" ) func main() { // Connect to NATS nc, err := nats.Connect(nats.DefaultURL) if err != nil { log.Fatal(err) } defer nc.Close() // Subscribe to a subject _, err = nc.Subscribe("my.subject", func(m *nats.Msg) { fmt.Printf("Received a message: %s\n", string(m.Data)) // Here you'd process the message // After processing, send a positive acknowledgment // Safely commit the offset (indices, etc. as your logic determines) m.Ack() // Acknowledge message }) if err != nil { log.Fatal(err) } // Wait indefinitely (or replace with your logic) select {} }

NATS Go message acknowledgment offsets message delivery message processing NATS Go client

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