Adding segment, totalSegments parameters in dynamodb-enhanced client to support parallel scan

[asanthan-amazon]

Adding segment, totalSegments parameters in dynamodb-enhanced client to support parallel scan.

Motivation and Context

This change is required to support parallel scan on dynamo-db table using enhanced-client.
Feature Request: #1851

Description

It allows sdk user to specify 'segment' and 'totalSegments' parameter in 'ScanEnhancedRequest' model.

Testing

I added unit tests wherever possible. DynamoDB local does not support parallel scan. So, the API flow was tested manually using integration test wherein I ran test to hit actual DDB in parallel using 5 threads and ensured the final outcome retrieved all the items after scan completes on all 5 threads.

Screenshots (if appropriate)

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• [ x] New feature (non-breaking change which adds functionality)

Checklist

• [x ] I have read the CONTRIBUTING document
• [x ] Local run of mvn install succeeds
• [x ] My code follows the code style of this project
• [x ] My change requires a change to the Javadoc documentation
• [x ] I have updated the Javadoc documentation accordingly
• [x ] I have read the README document
• [x ] I have added tests to cover my changes
• [x ] All new and existing tests passed
• [ x] A short description of the change has been added to the CHANGELOG
• My change is to implement 1.11 parity feature and I have updated LaunchChangelog

License

• [x ] I confirm that this pull request can be released under the Apache 2 license

[sonarqubecloud]

SonarCloud Quality Gate failed.   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
1 Code Smell

50.0% Coverage
4.5% Duplication

[bmaizels]

LGTM and a logical extension of the request (doesn't break the library conceptual precepts). Shame that we can't write a local DDB test for it. Only other thing I'd say is that if we didn't have a test to cover equals and hashcode for ScanEnhancedRequest, that is on us, but since you're touching it it'd be nice if you could add them to improve the code.

[asanthan-amazon]

Hi SDK Team,

Any update on merging this change to next release ?

[millems]

Thanks for your contribution, will merge as soon as possible.

[asanthan-amazon]

Thanks for your contribution, will merge as soon as possible.

Hi, Can you please let me know when this will be merged ?

[asanthan-amazon]

Thanks for your contribution, will merge as soon as possible.

Hi, Can you please let me know when this will be merged ?

Hi, I see some merge commits. But, not sure if it is actually merged. Can you please confirm ?

[millems]

I will merge today for a release tomorrow.

[sonarqubecloud]

SonarCloud Quality Gate failed.   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
1 Code Smell

50.0% Coverage
4.4% Duplication