DataSource (flink-cdc-parent 3.8-SNAPSHOT API)

All Known Implementing Classes:

FlussDataSource, MySqlDataSource, OracleDataSource, PostgresDataSource, SqlServerDataSource, ValuesDataSource
```
@PublicEvolving
public interface DataSource
```
DataSource is used to access metadata and read change data from external systems. It can read data from multiple tables simultaneously.

Method Summary

All Methods Instance Methods Abstract Methods Default Methods
Modifier and Type	Method	Description
`EventSourceProvider`	`getEventSourceProvider()`	Get the `EventSourceProvider` for reading events from external systems.
`MetadataAccessor`	`getMetadataAccessor()`	Get the `MetadataAccessor` for accessing metadata from external systems.
`default boolean`	`isParallelMetadataSource()`	Indicating if this source may generate metadata events (SchemaChangeEvents) in parallel for each table.
`default SupportedMetadataColumn[]`	`supportedMetadataColumns()`	Get the `SupportedMetadataColumn`s of the source.

- Method Detail
  - getEventSourceProvider
```
EventSourceProvider getEventSourceProvider()
```
    Get the EventSourceProvider for reading events from external systems.
  - getMetadataAccessor
```
MetadataAccessor getMetadataAccessor()
```
    Get the MetadataAccessor for accessing metadata from external systems.
  - supportedMetadataColumns
```
default SupportedMetadataColumn[] supportedMetadataColumns()
```
    Get the SupportedMetadataColumns of the source.
  - isParallelMetadataSource
```
@Experimental
default boolean isParallelMetadataSource()
```
    Indicating if this source may generate metadata events (SchemaChangeEvents) in parallel for each table. If returns false, you'll get a regular operator topology that is compatible with single-incremented sources like MySQL. Returns true for sources that does not maintain a globally sequential schema change events stream, like MongoDB or Kafka.
    Note that new topology still an experimental feature. Return false by default to avoid unexpected behaviors.