TrackingStreamingCallback (venice API)

All Superinterfaces:

StreamingCallback<K,V>

All Known Implementing Classes:

ClientComputeRecordStreamDecoder.Callback, DelegatingTrackingCallback
```
public interface TrackingStreamingCallback<K,V>
extends StreamingCallback<K,V>
```
This interface exposes one more function: onDeserializationCompletion(Optional, int, int), which will be used for metric tracking.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`java.util.Optional<ClientStats>`	`getStats()`
`void`	`onDeserializationCompletion(java.util.Optional<java.lang.Exception> exception, int successKeyCount, int duplicateEntryCount)`	This will be invoked when Venice Client deserialization is done.
`void`	`onRecordDeserialized()`	This will be invoked when any record deserialization happens.

Methods inherited from interface com.linkedin.venice.client.store.streaming.StreamingCallback
onCompletion, onRecordReceived

- Method Detail
  - getStats
```
java.util.Optional<ClientStats> getStats()
```
  - onRecordDeserialized
```
void onRecordDeserialized()
```
    This will be invoked when any record deserialization happens.
  - onDeserializationCompletion
```
void onDeserializationCompletion(java.util.Optional<java.lang.Exception> exception,
                                 int successKeyCount,
                                 int duplicateEntryCount)
```
    This will be invoked when Venice Client deserialization is done.
    
    Parameters:
    
    exception -
    
    successKeyCount - , this param indicates the total number of existing keys
    
    duplicateEntryCount -