Cloud Native Programming with Golang

Service clients

The second concept is the idea of service clients. A service client is an object that provides API access to a specific AWS service such as S3 or SQS. 

Service client objects are created from session objects. Here is an example of a piece of code that makes use of an S3 service client to obtain a list of buckets (an S3 bucket is simply a container of files and folders), then prints out the name of each bucket individually:

//Don't forget to import github.com/aws/aws-sdk-go/service/s3  sess, err := session.NewSession(&aws.Config{    Region: aws.String("us-west-1"),  })  if err != nil {    log.Fatal(err)  }  s3Svc := s3.New(sess)  results, err := s3Svc.ListBuckets(nil)  if err != nil {    log.Fatal("Unable to get bucket list")  } fmt.Println("Buckets:") ...