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https://issues.apache.org/jira/browse/HADOOP-12723?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15249844#comment-15249844
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Steve Loughran commented on HADOOP-12723:
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# I'd prefer using a commons.lang check for string null/emptyness, rather than
{{com.google.common.base.Strings}} ... our relationship with guava is, well,
strained.
# Id also like those caught and rethrown exceptions of construction wrapped
with an IOE, rather than RTE. It's a convention in the hadoop FS layer that
most methods declare they throw IOE, clients except to catch them for problems.
> S3A: Add ability to plug in any AWSCredentialsProvider
> ------------------------------------------------------
>
> Key: HADOOP-12723
> URL: https://issues.apache.org/jira/browse/HADOOP-12723
> Project: Hadoop Common
> Issue Type: New Feature
> Components: fs/s3
> Affects Versions: 2.7.1
> Reporter: Steven Wong
> Assignee: Steven Wong
> Attachments: HADOOP-12723.0.patch, HADOOP-12723.1.patch
>
>
> Although S3A currently has built-in support for
> {{org.apache.hadoop.fs.s3a.BasicAWSCredentialsProvider}},
> {{com.amazonaws.auth.InstanceProfileCredentialsProvider}}, and
> {{org.apache.hadoop.fs.s3a.AnonymousAWSCredentialsProvider}}, it does not
> support any other credentials provider that implements the
> {{com.amazonaws.auth.AWSCredentialsProvider}} interface. Supporting the
> ability to plug in any {{com.amazonaws.auth.AWSCredentialsProvider}} instance
> will expand the options for S3 credentials, such as:
> * temporary credentials from STS, e.g. via
> {{com.amazonaws.auth.STSSessionCredentialsProvider}}
> * IAM role-based credentials, e.g. via
> {{com.amazonaws.auth.STSAssumeRoleSessionCredentialsProvider}}
> * a custom credentials provider that satisfies one's own needs, e.g.
> bucket-specific credentials, user-specific credentials, etc.
> To support this, we can add a configuration for the fully qualified class
> name of a credentials provider, to be loaded by {{S3AFileSystem.initialize}}
> and added to its credentials provider chain.
> The configured credentials provider should implement
> {{com.amazonaws.auth.AWSCredentialsProvider}} and have a constructor that
> accepts {{(URI uri, Configuration conf)}}.
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