use aws-sdk-go-v2

[shamaton]

Issue #, if available:

#2

Description of changes:

use aws-sdk-go-v2 in the entire code. If you have any questions, please feel free to ask.

Summary of the changes

Although there are numerous changes in the code, I have made the following modifications:

• Import aws-sdk-go-v2, but no import aws-sdk-go
• All error is wrapped by using aws/smithy-go
• Compatible dynamodb V2 API (see also: dax.DynamoDBAPI)
• Functions such as Retryer use aws-sdk-go-v2.
• For functionalities that are difficult to maintain compatibility with, removed them temporarily (e.g., PutItemRequest, BatchGetItemPages)
• Of course all test passed

Verification

I have created a validation repository to confirm if the changed code is actually usable. https://github.com/shamaton/aws-dax-go-v2-test

• API: GetItem
• API: PutItem (also case: ConditionalExpression)
• API: UpdateItem
• API: DeleteItem
• API: Query
• API: Scan (also Count)
• API: BatchGetItems
• API: BatchWriteItems
• API: TransactGetItems
• Checked if the DAX cache is enable

The future of this pull request

I think there are the following options:

1. Merge this pull request into the master branch.
2. Merge the changes of this pull request into another branch, such as v2, and proceed with the operation.
3. Create a separate repository to make it usable, for example, aws/aws-dax-go-v2.
4. Reject this pull request (unfortunate decision).

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By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.