DataStreamSinkExternalContext (Flink : 2.0-SNAPSHOT API)

Type Parameters:

T - Type of elements before serialization by sink

All Superinterfaces:

AutoCloseable, ExternalContext, ResultTypeQueryable<T>

All Known Subinterfaces:

DataStreamSinkV2ExternalContext<T>
```
@Experimental
public interface DataStreamSinkExternalContext<T>
extends ExternalContext, ResultTypeQueryable<T>
```
External context for DataStream sinks.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`ExternalSystemDataReader<T>`	`createSinkDataReader(TestingSinkSettings sinkSettings)`	Create a reader for consuming data written to the external system by sink.
`List<T>`	`generateTestData(TestingSinkSettings sinkSettings, long seed)`	Generate test data.

Methods inherited from interface java.lang.AutoCloseable
close

Methods inherited from interface org.apache.flink.connector.testframe.external.ExternalContext
getConnectorJarPaths

Methods inherited from interface org.apache.flink.api.java.typeutils.ResultTypeQueryable
getProducedType

- Method Detail
  - createSinkDataReader
```
ExternalSystemDataReader<T> createSinkDataReader(TestingSinkSettings sinkSettings)
```
    Create a reader for consuming data written to the external system by sink.
  - generateTestData
```
List<T> generateTestData(TestingSinkSettings sinkSettings,
                         long seed)
```
    Generate test data.
    These test data will be sent to sink via a special source in Flink job, write to external system by sink, consume back via ExternalSystemDataReader, and make comparison with Object.equals(Object) for validating correctness.
    Make sure that the Object.equals(Object) returns false when the records in different splits.
    
    Parameters:
    
    sinkSettings - settings of the sink
    
    seed - Seed for generating random test data set.
    
    Returns:
    
    List of generated test data.