RowMetadata (Pinot Service Provider Interface 0.12.1 API)

All Known Implementing Classes:

StreamMessageMetadata
```
@Public
@Evolving
public interface RowMetadata
```
A class that provides relevant row-level metadata for rows indexed into a segment. Currently this is relevant for rows ingested into a mutable segment - the metadata is expected to be provided by the underlying stream.

Field Summary

Fields
Modifier and Type Field Description

static Map<String,String> EMPTY_COLLECTION

static GenericRow EMPTY_ROW

Method Summary

Modifier and Type	Method	Description
`default GenericRow`	`getHeaders()`	Returns the stream message headers
`long`	`getRecordIngestionTimeMs()`	Returns the timestamp associated with the record.
`default Map<String,String>`	`getRecordMetadata()`	Returns the metadata associated with the stream record Kafka's record offset would be an example of a metadata associated with the record.

- Field Detail
  - EMPTY_ROW
```
static final GenericRow EMPTY_ROW
```
  - EMPTY_COLLECTION
```
static final Map<String,String> EMPTY_COLLECTION
```
- Method Detail
  - getRecordIngestionTimeMs
```
long getRecordIngestionTimeMs()
```
    Returns the timestamp associated with the record. This typically refers to the time it was ingested into the upstream source. In some cases, it may be the time at which the record was created, aka event time (eg. in kafka, a topic may be configured to use record `CreateTime` instead of `LogAppendTime`). Expected to be used for stream-based sources.
    
    Returns:
    
    timestamp (epoch in milliseconds) when the row was ingested upstream Long.MIN_VALUE if not available
  - getHeaders
```
default GenericRow getHeaders()
```
    Returns the stream message headers
    
    Returns:
    
    A GenericRow that encapsulates the headers in the ingested row
  - getRecordMetadata
```
default Map<String,String> getRecordMetadata()
```
    Returns the metadata associated with the stream record Kafka's record offset would be an example of a metadata associated with the record. Record metadata is typically stream specific and hence, it is defined as a Map of strings.
    
    Returns:
    
    A Map of record metadata entries.