set up structured logging

src/cmd/main.go

@@ -1,41 +1,52 @@
 package main
 
 import (
-	"fmt"
 	"github.com/CDCgov/reportstream-sftp-ingestion/azure"
 	"github.com/CDCgov/reportstream-sftp-ingestion/report_stream"
-	"log"
+	"log/slog"
+	"os"
 	"time"
 )
 
 func main() {
-	fmt.Println("Hello World")
+
+	setupLogging()
+
+	slog.Info("Hello World")
 
 	//TODO: Extract the client string to allow multi-environment
 	blobHandler, err := azure.NewBlobHandler("DefaultEndpointsProtocol=http;AccountName=devstoreaccount1;AccountKey=Eby8vdM02xNOcqFlqUwJPLlmEtlCDXJ1OUzFT50uSRZ6IFsuFq2UVErCz4I6tq/K1SZFPTOtr/KBHBeksoGMGw==;BlobEndpoint=http://127.0.0.1:10000/devstoreaccount1;")
 	if err != nil {
-		log.Fatalf("Failed to init Azure blob client: %v", err)
+		slog.Error("Failed to init Azure blob client", slog.Any("error", err))
+		os.Exit(1)
 	}
 
 	content, err := readAzureFile(blobHandler, "reportstream.txt")
 	if err != nil {
-		log.Fatalf("Failed to read the file: %v", err)
+		slog.Error("Failed to read the file", slog.Any("error", err))
+		os.Exit(1)
 	}
 
 	apiHandler := report_stream.ApiHandler{"http://localhost:7071"}
 	reportId, err := apiHandler.SendReport(content)
 	if err != nil {
-		log.Fatalf("Failed to send the file to ReportStream: %v", err)
+		slog.Error("Failed to send the file to ReportStream", slog.Any("error", err))
+		os.Exit(1)
 	}
-	log.Printf("File sent to ReportStream - reportId: %s", reportId)
+	slog.Info("File sent to ReportStream", slog.String("reportId", reportId))
 
 	for {
 		t := time.Now()
-		fmt.Println(t.Format("2006-01-02T15:04:05Z07:00"))
+		slog.Info(t.Format("2006-01-02T15:04:05Z07:00"))
 		time.Sleep(10 * time.Second)
 	}
 }
 
+func setupLogging() {
+	jsonLogger := slog.New(slog.NewJSONHandler(os.Stdout, nil))
+	slog.SetDefault(jsonLogger)
+}
+
 type BlobHandler interface {
 	FetchFile(blobPath string) ([]byte, error)
 }
@@ -47,7 +58,7 @@ func readAzureFile(blobHandler BlobHandler, filePath string) ([]byte, error) {
 	}
 
 	//TODO: Auth and call ReportStream
-	log.Println(string(content))
+	slog.Info(string(content))
 
 	return content, nil
 }