@Override
public AmazonS3 load(S3ClientKey clientKey) throws Exception {
  logger.debug("Opening S3 client connection for {}", clientKey);
  DefaultS3ClientFactory clientFactory = new DefaultS3ClientFactory();
  clientFactory.setConf(clientKey.s3Config);
  final AWSCredentialProviderList credentialsProvider = S3AUtils.createAWSCredentialProviderSet(S3_URI, clientKey.s3Config);
  final AmazonS3 s3Client = clientFactory.createS3Client(S3_URI, "", credentialsProvider);

  return registerReference(AmazonS3.class, s3Client, client -> {
    client.shutdown();

    try {
      // Note that AWS SDKv1 client will NOT close the credentials provider when being closed so it has to be done ourselves
      // Because client still holds a reference to credentials provider, it won't be garbage collected until the client is garbage collected itself
      if (credentialsProvider instanceof AutoCloseable) {
        ((AutoCloseable) credentialsProvider).close();
      }
    } catch (Exception e) {
        logger.warn("Failed to close AWS credentials provider", e);
    }
  });
}
 

public STSCredentialProviderV1(URI uri, Configuration conf) throws IOException {

    AWSCredentialsProvider awsCredentialsProvider = null;

    //TODO: Leverage S3AUtils createAwsCredentialProvider

    if (S3StoragePlugin.ACCESS_KEY_PROVIDER.equals(conf.get(Constants.ASSUMED_ROLE_CREDENTIALS_PROVIDER))) {
      awsCredentialsProvider = new SimpleAWSCredentialsProvider(uri, conf);
    } else if (S3StoragePlugin.EC2_METADATA_PROVIDER.equals(conf.get(Constants.ASSUMED_ROLE_CREDENTIALS_PROVIDER))) {
      awsCredentialsProvider = InstanceProfileCredentialsProvider.getInstance();
    }

    final String region = S3FileSystem.getAWSRegionFromConfigurationOrDefault(conf).toString();
    final AWSSecurityTokenServiceClientBuilder builder = AWSSecurityTokenServiceClientBuilder.standard()
      .withCredentials(awsCredentialsProvider)
      .withClientConfiguration(S3AUtils.createAwsConf(conf, ""))
      .withRegion(region);
    S3FileSystem.getStsEndpoint(conf).ifPresent(e -> {
      builder.withEndpointConfiguration(new AwsClientBuilder.EndpointConfiguration(e, region));
    });

    this.stsAssumeRoleSessionCredentialsProvider = new STSAssumeRoleSessionCredentialsProvider.Builder(
      conf.get(Constants.ASSUMED_ROLE_ARN), UUID.randomUUID().toString())
      .withStsClient(builder.build())
      .build();
  }
 

@Override
public ObjectMetadata getObjectMetadata(String key) throws IOException {
	try {
		return s3a.getObjectMetadata(new Path('/' + key));
	}
	catch (SdkBaseException e) {
		throw S3AUtils.translateException("getObjectMetadata", key, e);
	}
}
 

@Override
public ObjectMetadata getObjectMetadata(String key) throws IOException {
	try {
		return s3a.getObjectMetadata(new Path('/' + key));
	}
	catch (SdkBaseException e) {
		throw S3AUtils.translateException("getObjectMetadata", key, e);
	}
}
 

@Override
public ObjectMetadata getObjectMetadata(String key) throws IOException {
	try {
		return s3a.getObjectMetadata(new Path('/' + key));
	}
	catch (SdkBaseException e) {
		throw S3AUtils.translateException("getObjectMetadata", key, e);
	}
}