org.elasticsearch.plugins.scanners.StablePluginsRegistry Maven / Gradle / Ivy
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Elasticsearch subproject :server
/*
* Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
* or more contributor license agreements. Licensed under the Elastic License
* 2.0 and the Server Side Public License, v 1; you may not use this file except
* in compliance with, at your election, the Elastic License 2.0 or the Server
* Side Public License, v 1.
*/
package org.elasticsearch.plugins.scanners;
import org.elasticsearch.plugins.PluginBundle;
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.Map;
/**
* A registry of classes declared by plugins as named components.
* Named components are classes annotated with @NamedComponent(name) and can be referred later by a name given in this annotation.
* Named components implement/extend Extensibles (classes/interfaces marked with @Extensible)
*/
public class StablePluginsRegistry {
/*
A map of an interface/class name marked (effectively) with @Extensible to NameToPluginInfo map
effectively means that an interface which extends another interface marked with @Extensible is also extensible
NameToPluginInfo map is a map of Name to PluginInfo
i.e.
org.elasticsearch.plugin.analysis.api.TokenFilterFactory ->
{"nori" -> {nori, org.elasticserach.plugin.analysis.new_nori.NoriReadingFormFilterFactory, classloaderInstance}
*/
private final Map namedComponents;
private final NamedComponentReader namedComponentReader;
public StablePluginsRegistry() {
this(new NamedComponentReader(), new HashMap<>());
}
// for testing
public StablePluginsRegistry(NamedComponentReader namedComponentReader, Map namedComponents) {
this.namedComponentReader = namedComponentReader;
this.namedComponents = namedComponents;
}
public void scanBundleForStablePlugins(PluginBundle bundle, ClassLoader pluginClassLoader) {
Map namedComponentsFromPlugin = namedComponentReader.findNamedComponents(bundle, pluginClassLoader);
for (Map.Entry entry : namedComponentsFromPlugin.entrySet()) {
namedComponents.compute(entry.getKey(), (k, v) -> v != null ? v.put(entry.getValue()) : entry.getValue());
}
}
public Collection getPluginInfosForExtensible(String extensibleClassName) {
NameToPluginInfo nameToPluginInfo = namedComponents.get(extensibleClassName);
if (nameToPluginInfo != null) {
return nameToPluginInfo.nameToPluginInfoMap().values();
}
return Collections.emptyList();
}
}