Create a custom provider for AwsRegionProviderChain

[ptirador]

Task Description

The S3Factory class manages the build of a new Amazon S3 instance, which needs a region. This is provided by getting it from a properties file, and, in the case there's no property defined, the region is obtained by using a default region provider chain.

As specified in this Pull Request discussion, although it's highly unlikely, there could be a different region provider chain needed by a consumer of the API (this would have to be custom, as the SDK only has Default). Might want to provide a customization option for this, rather than hard coding new DefaultAwsRegionProviderChain.

Tasks

The following tasks will need to be carried out:

• Create a custom provider class org.carlspring.cloud.storage.s3fs.S3AwsRegionProviderChain.
• This class must extend from software.amazon.awssdk.regions.providers.AwsRegionProviderChain.
• This class must have a constructor which will call its parent constructor to define a list of region providers, which will be (for the moment), in this order:
  software.amazon.awssdk.regions.providers.SystemSettingsRegionProvider
software.amazon.awssdk.regions.providers.AwsProfileRegionProvider
• getRegion method should not be overridden, so method from parent will be used.
• Use this new provider chain in org.carlspring.cloud.storage.s3fs.S3Factory class, getRegionmethod, by replacing the DefaultAwsProviderChain with the new one.

Task Relationships

This task:

• Is a follow-up of: Upgrade to aws-sdk-java-v2 #63

Useful Links

• AWS Region Selection

Help

• Our chat channel
• Points of contact:
  • @carlspring
  • @steve-todorov
  • @sbespalov

[pyashwanthkumar]

where should the class AwsRegionProviderChain be created? the only method of this class would be to get the region from user and setting it?

[ptirador]

@pyashwanthkumar I've updated the issue description with a more specific tasks list. Hope it helps.