Package org.apache.solr.cluster.placement.impl

Class DelegatingPlacementPluginFactory

java.lang.Object

org.apache.solr.cluster.placement.impl.DelegatingPlacementPluginFactory

All Implemented Interfaces:

ConfigurablePlugin<PlacementPluginConfig>, PlacementPluginFactory<PlacementPluginConfig>

public final class DelegatingPlacementPluginFactory
extends Object
implements PlacementPluginFactory<PlacementPluginConfig>

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(PlacementPluginFactory<?> defaultPlacementPluginFactory)	Constructor.

Method Summary

Modifier and Type	Method	Description
PlacementPlugin	createPluginInstance()	Returns an instance of the plugin that will be repeatedly (and concurrently) called to compute placement.
PlacementPluginConfig	getConfig()	Return the configuration of the plugin.
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

Constructor Details

DelegatingPlacementPluginFactory

public DelegatingPlacementPluginFactory(PlacementPluginFactory<?> defaultPlacementPluginFactory)

Constructor.

Parameters:

defaultPlacementPluginFactory - A PlacementPluginFactory to use when no delegate is defined.

Method Details

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).

Specified by:

createPluginInstance in interface PlacementPluginFactory<PlacementPluginConfig>

getConfig

public PlacementPluginConfig getConfig()

Description copied from interface: PlacementPluginFactory

Return the configuration of the plugin. Default implementation returns null.

Specified by:

getConfig in interface PlacementPluginFactory<PlacementPluginConfig>

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()