[FLINK-28049][connectors] Introduce FLIP-208 functionality to stop So…

[kamronis]

…urce based on consumed records. Add interfaces for Kafka and Pulsar sources.

What is the purpose of the change

This pull request provides interface for creating RecordEvalutor classes to stop source based on consumed records. Added functionality works for Kafka and Pulsar sources.

Brief change log

• Added RecordEvalutor interface
• Added SourceOutPutWrapper to
• Modified SourceReaderBase and SingleThreadMultiplexSourceReaderBase to work with evaluator
• Added setEofRecordEvaluator methods for Kafka and Pulsar connectors

Verifying this change

This change added tests and can be verified as follows:

(example:)

• Added tests to validate stopping of the job when number element is reached

Does this pull request potentially affect one of the following parts:

• Dependencies (does it add or upgrade a dependency): (no)
• The public API, i.e., is any changed class annotated with @Public(Evolving): (yes)
• The serializers: (no)
• The runtime per-record code paths (performance sensitive): (yes)
• Anything that affects deployment or recovery: JobManager (and its components), Checkpointing, Kubernetes/Yarn, ZooKeeper: (don't know)
• The S3 file system connector: (no)

Documentation

• Does this pull request introduce a new feature? (yes)
• If yes, how is the feature documented? (JavaDocs)

[flinkbot]

CI report:

• 139458d Azure: FAILURE

Bot commands

The @flinkbot bot supports the following commands:

• @flinkbot run azure re-run the last Azure build

[MartijnVisser]

@kamronis Thanks for the PR, but no vote has happened on FLIP-208 so it can't be merged and hence a review also doesn't really make sense yet

[MartijnVisser]

First get the FLIP accepted, then let's review