AmazonS3Client(credentials) is deprecated

Question

I'm trying to read the files available on Amazon S3, as the question explains the problem. I couldn't find an alternative call for the deprecated constructor.

Here's the code:

private String AccessKeyID = "xxxxxxxxxxxxxxxxxxxx";
private String SecretAccessKey = "xxxxxxxxxxxxxxxxxxxxxxxxxxxxx";
private static String bucketName     = "documentcontainer";
private static String keyName     = "test";
//private static String uploadFileName    = "/PATH TO FILE WHICH WANT TO UPLOAD/abc.txt";

AWSCredentials credentials = new BasicAWSCredentials(AccessKeyID, SecretAccessKey);

void downloadfile() throws IOException
{

    // Problem lies here - AmazonS3Client is deprecated
    AmazonS3 s3client = new AmazonS3Client(credentials);
        try {
        System.out.println("Downloading an object...");
        S3Object s3object = s3client.getObject(new GetObjectRequest(
                bucketName, keyName));
        System.out.println("Content-Type: "  +
                s3object.getObjectMetadata().getContentType());
        InputStream input = s3object.getObjectContent();

        BufferedReader reader = new BufferedReader(new InputStreamReader(input));
        while (true) {
            String line = reader.readLine();
            if (line == null) break;

            System.out.println("    " + line);
        }
        System.out.println();
    } catch (AmazonServiceException ase) {
          //do something
    } catch (AmazonClientException ace) {
        // do something
    }
 }

Any help? If more explanation is needed please mention it. I have checked on the sample code provided in .zip file of SDK, and it's the same.

Solution 1

You can either use AmazonS3ClientBuilder or AwsClientBuilder as alternatives.

For S3, simplest would be with AmazonS3ClientBuilder,

BasicAWSCredentials creds = new BasicAWSCredentials("access_key", "secret_key"); 
AmazonS3 s3Client = AmazonS3ClientBuilder.standard().withCredentials(new AWSStaticCredentialsProvider(creds)).build();

Solution 2

Use the code listed below to create an S3 client without credentials:

AmazonS3 s3Client = AmazonS3ClientBuilder.standard().build();

An usage example would be a lambda function calling S3.

Solution 3

You need to pass the region information through the

com.amazonaws.regions.Region object.

Use AmazonS3Client(credentials, Region.getRegion(Regions.REPLACE_WITH_YOUR_REGION))

Solution 4

You can create S3 default client as follows(with aws-java-sdk-s3-1.11.232):

AmazonS3ClientBuilder.defaultClient();

Solution 5

Deprecated with only creentials in constructor, you can use something like this:

 val awsConfiguration = AWSConfiguration(context)
 val awsCreds = CognitoCachingCredentialsProvider(context, awsConfiguration)
 val s3Client = AmazonS3Client(awsCreds, Region.getRegion(Regions.EU_CENTRAL_1))

View more solutions

Comments

[rockstarjindal]

Was there any reason behind this deprecation, are there any benefits of using AmazonS3ClientBuilder.standard() vs new AmazonS3Client (from the previous SDKs)

[bikeman868]

Both AmazonS3ClientBuilder and AwsClientBuilder are not present in the latest NuGet packages for .Net 4.0, but various methods are depreciated including StoredProfileAWSCredentials (which I am currently using). Does anyone know the recommended approach for .Net 4.0?

[user3526918]

As you use AmazonS3ClientBuilder, myClient.setRegion() no longer works. You've got to AmazonS3ClientBuilder.standard().withCredential().withRegion‌​("eu-west-1").build(‌​);

[Clive Sargeant]

thanks but only worked for me when i included withRegion()

[Amit Kumar]

AWSStaticCredentialsProvider is also depricated @franklinsijo

[Priyadarshi Kunal]

@rockstarjindal The client builder are better than old constructor in following ways. Clients created with builders are Immutable. Client must have explicit region. Builders provide a cleaner chaining API.

[Priyadarshi Kunal]

A client created via the builders must have a region that is defined either explicitly (i.e. by calling withRegion) or as part of the DefaultAwsRegionProviderChain. If the builder can’t determine the region for a client, an SdkClientException is thrown.

[JaviOverflow]

Where is it getting the credentials from?

[Sach]

From AWS documentaion at :docs.aws.amazon.com/sdk-for-java/v1/developer-guide/… You can do this in the following ways: 1.Use the default credential provider chain (recommended). 2.Use a specific credential provider or provider chain. 3.Supply the credentials yourself. It is recommended to use IAM roles. E.g. for AWS lambda, create an IAM role which has access to S3 and create the client in lambda code. Supply this Role while configuring your lambda, similarly for EC2 instance or ECS etc.

[JaviOverflow]

could you explain this a little bit more? "1.Use the default credential provider chain"

[android developer]

Where do I get the region from ? What is an example of it? And why does it need a region?

[Abhay Pratap]

Please see this link to find the region in AWS stackoverflow.com/questions/4249488/…

[android developer]

What if I had this before: AmazonS3Client s3Client = new AmazonS3Client(new AnonymousAWSCredentials()); ? It has no region, no?