Problem:

Hello team

I'm migrating from SDK V2 to V3 and currently, I'm using encrypt and decryptData methods with a CachingCryptoMaterialsManager. These methods are deprecated in V3, my questions are:

1. What cache mechanism should I use to keep the same behavior? Is it AwsKmsHierarchicalKeyring? I didn't find a documentation for this
2. How can I migrate without breaking the compatibility? When I promote the changes to production I must be able to continue decrypting old items in the queue for a while. There is no guide to migrate to V3 like other AWS SDKs have to help with this task

Thanks.