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/*
* 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.inject.AbstractModule;
import org.elasticsearch.common.inject.multibindings.MapBinder;
import org.elasticsearch.common.inject.multibindings.Multibinder;
import org.elasticsearch.common.settings.Settings;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
/**
* An {@link org.elasticsearch.common.inject.Module} which manages {@link ScriptEngineService}s, as well
* as named script
*/
public class ScriptModule extends AbstractModule {
private final Settings settings;
private final List<Class<? extends ScriptEngineService>> scriptEngines = new ArrayList<>();
private final Map<String, Class<? extends NativeScriptFactory>> scripts = new HashMap<>();
private final List<ScriptContext.Plugin> customScriptContexts = new ArrayList<>();
public ScriptModule(Settings settings) {
this.settings = settings;
}
public void addScriptEngine(Class<? extends ScriptEngineService> scriptEngine) {
scriptEngines.add(scriptEngine);
}
public void registerScript(String name, Class<? extends NativeScriptFactory> script) {
scripts.put(name, script);
}
/**
* Registers a custom script context that can be used by plugins to categorize the different operations that they use scripts for.
* Fine-grained settings allow to enable/disable scripts per context.
*/
public void registerScriptContext(ScriptContext.Plugin scriptContext) {
customScriptContexts.add(scriptContext);
}
@Override
protected void configure() {
MapBinder<String, NativeScriptFactory> scriptsBinder
= MapBinder.newMapBinder(binder(), String.class, NativeScriptFactory.class);
for (Map.Entry<String, Class<? extends NativeScriptFactory>> entry : scripts.entrySet()) {
scriptsBinder.addBinding(entry.getKey()).to(entry.getValue()).asEagerSingleton();
}
Multibinder<ScriptEngineService> multibinder = Multibinder.newSetBinder(binder(), ScriptEngineService.class);
multibinder.addBinding().to(NativeScriptEngineService.class);
for (Class<? extends ScriptEngineService> scriptEngine : scriptEngines) {
multibinder.addBinding().to(scriptEngine).asEagerSingleton();
}
bind(ScriptContextRegistry.class).toInstance(new ScriptContextRegistry(customScriptContexts));
bind(ScriptService.class).asEagerSingleton();
}
}
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