GenericQueryMetricsFactory (druid-processing 28.0.1 API)

All Known Implementing Classes:

DefaultGenericQueryMetricsFactory
```
public interface GenericQueryMetricsFactory
```
This factory is used for DI of custom QueryMetrics implementations for all query types, which don't (yet) need to emit custom dimensions and/or metrics, i. e. they are good with the generic QueryMetrics interface. Implementations could be injected using PolyBind .optionBinder(binder, Key.get(GenericQueryMetricsFactory.class)) .addBinding("myCustomGenericQueryMetricsFactory") .to(MyCustomGenericQueryMetricsFactory.class); And then setting property: druid.query.generic.queryMetricsFactory=myCustomGenericQueryMetricsFactory Unlike QueryMetrics itself, this interface is considered stable and is expected to be injected into custom Query extensions that do not want to worry about the potential instability of QueryMetrics.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`QueryMetrics<Query<?>>`	`makeMetrics()`	Creates a `QueryMetrics` which doesn't have predefined QueryMetrics subclass.
`QueryMetrics<Query<?>>`	`makeMetrics(Query<?> query)`	Creates a `QueryMetrics` for query, which doesn't have predefined QueryMetrics subclass.

- Method Detail
  - makeMetrics
```
QueryMetrics<Query<?>> makeMetrics(Query<?> query)
```
    Creates a QueryMetrics for query, which doesn't have predefined QueryMetrics subclass. This method must call QueryMetrics.query(Query) with the given query on the created QueryMetrics object before returning.
  - makeMetrics
```
QueryMetrics<Query<?>> makeMetrics()
```
    Creates a QueryMetrics which doesn't have predefined QueryMetrics subclass. This method is used by the router to build a QueryMetrics for SQL queries. It is needed since at router, there is no native query linked to a SQL query.