Can't retrieve Amazon Credentials

Question

I am trying to provide credentials for my Spring boot maven application hosted on the cloud (Pivotal Web Services) to be able to upload to Amazon S3. However, every time I try to get the credentials using:

DefaultAWSCredentialsProviderChain credentialProviderChain = new DefaultAWSCredentialsProviderChain();
TransferManager transferManager = new TransferManager(credentialProviderChain.getCredentials());

It says

Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception 
[Request processing failed; nested exception is com.amazonaws.AmazonClientException: Unable
to load AWS credentials from any provider in the chain] with root cause
2016-01-28T23:55:38.55+0000 [APP/0]      OUT com.amazonaws.AmazonClientException: 
Unable to load AWS credentials from any provider in the chain

I'm a bit confused as to whether my credentials should be defined in a beans.xml or application.properties file. But I have tried both to no avail. Could someone point me in the right direction?

Answer 1

Check out the docs! http://docs.aws.amazon.com/AWSJavaSDK/latest/javadoc/com/amazonaws/auth/DefaultAWSCredentialsProviderChain.html

AWS credentials provider chain that looks for credentials in this order:

• Environment Variables - AWS_ACCESS_KEY_ID and AWS_SECRET_ACCESS_KEY (RECOMMENDED since they are recognized by all the AWS SDKs and CLI except for .NET), or AWS_ACCESS_KEY and AWS_SECRET_KEY (only recognized by Java SDK)
• Java System Properties - aws.accessKeyId and aws.secretKey
• Credential profiles file at the default location (~/.aws/credentials) shared by all AWS SDKs and the AWS CLI
• Instance profile credentials delivered through the Amazon EC2 metadata service

More general docs here: http://docs.aws.amazon.com/AWSSdkDocsJava/latest/DeveloperGuide/credentials.html

Answer 2

this approach worked:

$ export AWS_ACCESS_KEY_ID=...
$ export AWS_SECRET_ACCESS_KEY=...