Change shutdown message to use info level logging

background.go

@@ -2,6 +2,7 @@ package asynq
 
 import (
 	"fmt"
+	"log"
 	"os"
 	"os/signal"
 	"sync"
@@ -43,7 +44,8 @@ func (bg *Background) Run(handler TaskHandler) {
 	sigs := make(chan os.Signal, 1)
 	signal.Notify(sigs, os.Interrupt, os.Kill)
 	<-sigs
-	fmt.Printf("\nStarting graceful shutdown...\n")
+	fmt.Println()
+	log.Println("[INFO] Starting graceful shutdown...")
 }
 
 // starts the background-task processing.

poller.go

@@ -1,7 +1,6 @@
 package asynq
 
 import (
-	"fmt"
 	"log"
 	"time"
 )
@@ -29,7 +28,7 @@ func newPoller(rdb *rdb, avgInterval time.Duration, zsets []string) *poller {
 }
 
 func (p *poller) terminate() {
-	fmt.Print("Poller shutting down...")
+	log.Println("[INFO] Poller shutting down...")
 	// Signal the poller goroutine to stop polling.
 	p.done <- struct{}{}
 }
@@ -40,7 +39,7 @@ func (p *poller) start() {
 		for {
 			select {
 			case <-p.done:
-				fmt.Println("Done")
+				log.Println("[INFO] Poller done.")
 				return
 			default:
 				p.exec()

processor.go

@@ -29,16 +29,16 @@ func newProcessor(rdb *rdb, numWorkers int, handler TaskHandler) *processor {
 }
 
 func (p *processor) terminate() {
-	fmt.Print("Processor shutting down...")
+	log.Println("[INFO] Processor shutting down...")
 	// Signal the processor goroutine to stop processing tasks from the queue.
 	p.done <- struct{}{}
 
-	fmt.Print("Waiting for all workers to finish...")
+	log.Println("[INFO] Waiting for all workers to finish...")
 	// block until all workers have released the token
 	for i := 0; i < cap(p.sema); i++ {
 		p.sema <- struct{}{}
 	}
-	fmt.Println("Done")
+	log.Println("[INFO] All workers have finished.")
 }
 
 func (p *processor) start() {
@@ -49,7 +49,7 @@ func (p *processor) start() {
 		for {
 			select {
 			case <-p.done:
-				fmt.Println("Done")
+				log.Println("[INFO] Processor done.")
 				return
 			default:
 				p.exec()