/*
* Licensed to Elasticsearch under one or more contributor
* license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright
* ownership. Elasticsearch licenses this file to you under
* the Apache License, Version 2.0 (the "License"); you may
* not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.elasticsearch.script;
import org.elasticsearch.common.settings.ClusterSettings;
import org.elasticsearch.common.settings.Setting;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.env.Environment;
import org.elasticsearch.plugins.ScriptPlugin;
import org.elasticsearch.watcher.ResourceWatcherService;
import java.io.IOException;
import java.util.List;
import java.util.Map;
import java.util.Objects;
import java.util.function.Function;
import java.util.stream.Collectors;
/**
* Manages building {@link ScriptService} and {@link ScriptSettings} from a list of plugins.
*/
public class ScriptModule {
private final ScriptSettings scriptSettings;
private final ScriptService scriptService;
/**
* Build from {@linkplain ScriptPlugin}s. Convenient for normal use but not great for tests. See
* {@link ScriptModule#ScriptModule(Settings, Environment, ResourceWatcherService, List, List)} for easier use in tests.
*/
public static ScriptModule create(Settings settings, Environment environment,
ResourceWatcherService resourceWatcherService, List<ScriptPlugin> scriptPlugins) {
Map<String, NativeScriptFactory> factoryMap = scriptPlugins.stream().flatMap(x -> x.getNativeScripts().stream())
.collect(Collectors.toMap(NativeScriptFactory::getName, Function.identity()));
NativeScriptEngine nativeScriptEngineService = new NativeScriptEngine(settings, factoryMap);
List<ScriptEngine> scriptEngines = scriptPlugins.stream().map(x -> x.getScriptEngine(settings))
.filter(Objects::nonNull).collect(Collectors.toList());
scriptEngines.add(nativeScriptEngineService);
List<ScriptContext.Plugin> plugins = scriptPlugins.stream().map(x -> x.getCustomScriptContexts()).filter(Objects::nonNull)
.collect(Collectors.toList());
return new ScriptModule(settings, environment, resourceWatcherService, scriptEngines, plugins);
}
/**
* Build {@linkplain ScriptEngine} and {@linkplain ScriptContext.Plugin}.
*/
public ScriptModule(Settings settings, Environment environment,
ResourceWatcherService resourceWatcherService, List<ScriptEngine> scriptEngines,
List<ScriptContext.Plugin> customScriptContexts) {
ScriptContextRegistry scriptContextRegistry = new ScriptContextRegistry(customScriptContexts);
ScriptEngineRegistry scriptEngineRegistry = new ScriptEngineRegistry(scriptEngines);
scriptSettings = new ScriptSettings(scriptEngineRegistry, scriptContextRegistry);
try {
scriptService = new ScriptService(settings, environment, resourceWatcherService, scriptEngineRegistry, scriptContextRegistry,
scriptSettings);
} catch (IOException e) {
throw new RuntimeException("Couldn't setup ScriptService", e);
}
}
/**
* Extra settings for scripts.
*/
public List<Setting<?>> getSettings() {
return scriptSettings.getSettings();
}
/**
* Service responsible for managing scripts.
*/
public ScriptService getScriptService() {
return scriptService;
}
/**
* Allow the script service to register any settings update handlers on the cluster settings
*/
public void registerClusterSettingsListeners(ClusterSettings clusterSettings) {
scriptService.registerClusterSettingsListeners(clusterSettings);
}
}