AffinityReplicaListTransformerFactory (Solr 9.0.0 solrj API)

java.lang.Object
- org.apache.solr.client.solrj.routing.AffinityReplicaListTransformerFactory

All Implemented Interfaces:

ReplicaListTransformerFactory
```
public class AffinityReplicaListTransformerFactory
extends Object
implements ReplicaListTransformerFactory
```
Factory for constructing an AffinityReplicaListTransformer that reorders replica routing preferences deterministically, based on request parameters.
Default names of params that contain the values by which routing is determined may be configured at the time of AffinityReplicaListTransformerFactory construction, and may be overridden by the config spec passed to getInstance(String, SolrParams, ReplicaListTransformerFactory)
If no defaultHashParam name is specified at time of factory construction, the routing dividend will be derived by hashing the String value of the CommonParams.Q param.

Constructor Summary

Constructors
Constructor	Description
`AffinityReplicaListTransformerFactory()`
`AffinityReplicaListTransformerFactory(String defaultDividendParam, String defaultHashParam)`
`AffinityReplicaListTransformerFactory(NamedList<?> c)`

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`ReplicaListTransformer`	`getInstance(String configSpec, SolrParams requestParams, ReplicaListTransformerFactory fallback)`

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - AffinityReplicaListTransformerFactory
```
public AffinityReplicaListTransformerFactory()
```
  - AffinityReplicaListTransformerFactory
```
public AffinityReplicaListTransformerFactory(String defaultDividendParam,
                                             String defaultHashParam)
```
  - AffinityReplicaListTransformerFactory
```
public AffinityReplicaListTransformerFactory(NamedList<?> c)
```
- Method Detail
  - getInstance
```
public ReplicaListTransformer getInstance(String configSpec,
                                          SolrParams requestParams,
                                          ReplicaListTransformerFactory fallback)
```
    Specified by:
    
    getInstance in interface ReplicaListTransformerFactory
    
    Parameters:
    
    configSpec - spec for dynamic configuration of ReplicaListTransformer
    
    requestParams - the request parameters for which the ReplicaListTransformer is being generated
    
    fallback - used to generate fallback value; the getInstance() method of the specified fallback must not return null; The fallback value itself may be null if this implementation is known to never return null (i.e., if fallback will never be needed)
    
    Returns:
    
    ReplicaListTransformer to be used for routing this request