DelegatingPlacementPluginFactory (Solr 9.0.0 core API)

java.lang.Object
- org.apache.solr.cluster.placement.impl.DelegatingPlacementPluginFactory

All Implemented Interfaces:

ConfigurablePlugin<PlacementPluginFactory.NoConfig>, PlacementPluginFactory<PlacementPluginFactory.NoConfig>
```
public final class DelegatingPlacementPluginFactory
extends Object
implements PlacementPluginFactory<PlacementPluginFactory.NoConfig>
```
Helper class to support dynamic reloading of plugin implementations.

Nested Class Summary
- Nested classes/interfaces inherited from interface org.apache.solr.cluster.placement.PlacementPluginFactory
  PlacementPluginFactory.NoConfig

Field Summary
- Fields inherited from interface org.apache.solr.cluster.placement.PlacementPluginFactory
  PLUGIN_NAME

Constructor Summary

Constructors
Constructor Description

DelegatingPlacementPluginFactory()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`PlacementPlugin`	`createPluginInstance()`	Returns an instance of the plugin that will be repeatedly (and concurrently) called to compute placement.
`PlacementPluginFactory<? extends PlacementPluginConfig>`	`getDelegate()`
`void`	`setDelegate(PlacementPluginFactory<? extends PlacementPluginConfig> delegate)`
`void`	`setDelegationPhaser(Phaser phaser)`	A phaser that will advance phases every time `setDelegate(PlacementPluginFactory)` is called.

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

Methods inherited from interface org.apache.solr.cluster.placement.PlacementPluginFactory
configure, getConfig

- Constructor Detail
  - DelegatingPlacementPluginFactory
```
public DelegatingPlacementPluginFactory()
```
- Method Detail
  - createPluginInstance
```
public PlacementPlugin createPluginInstance()
```
    Description copied from interface: PlacementPluginFactory
    
    Returns an instance of the plugin that will be repeatedly (and concurrently) called to compute placement. Multiple instances of a plugin can be used in parallel (for example if configuration has to change, but plugin instances with the previous configuration are still being used).
    If this method returns null then a simple default assignment strategy will be used (see SimplePlacementFactory).
    
    Specified by:
    
    createPluginInstance in interface PlacementPluginFactory<PlacementPluginFactory.NoConfig>
  - setDelegationPhaser
```
public void setDelegationPhaser(Phaser phaser)
```
    A phaser that will advance phases every time setDelegate(PlacementPluginFactory) is called. Useful for allowing tests to know when a new delegate is finished getting set.
  - setDelegate
```
public void setDelegate(PlacementPluginFactory<? extends PlacementPluginConfig> delegate)
```
  - getDelegate
```
public PlacementPluginFactory<? extends PlacementPluginConfig> getDelegate()
```