We announced the upcoming end-of-support for AWS SDK for Java (v1). We recommend that you migrate to AWS SDK for Java v2. For dates, additional details, and information on how to migrate, please refer to the linked announcement.
This is the callback interface which is used by TransferManager.uploadDirectory and
TransferManager.uploadFileList. The callback is invoked for each file that is uploaded by
TransferManager and given an opportunity to specify the metadata for each file.