Committer (druid-processing 28.0.0 API)

All Superinterfaces:

Runnable
```
public interface Committer
extends Runnable
```
Committer includes a Runnable and a Jackson-serialized metadata object containing the offset

- Method Summary
  
  All Methods Instance Methods Abstract Methods
  Modifier and Type Method Description
  
  Object getMetadata()
  - Methods inherited from interface java.lang.Runnable
    run

- Method Detail
  - getMetadata
```
@Nullable
Object getMetadata()
```
    Returns:
    
    A json serialized representation of commit metadata, which needs to be serialized and deserialized by Jackson. Commit metadata can be a complex type, but we recommend keeping it to List/Map/"Primitive JSON" types