/*
* Licensed to Elastic Search and Shay Banon under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. Elastic Search 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.ElasticSearchIllegalArgumentException;
import org.elasticsearch.common.collect.Lists;
import org.elasticsearch.common.collect.Maps;
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 org.elasticsearch.script.mvel.MvelScriptEngineService;
import java.util.List;
import java.util.Map;
/**
* @author kimchy (shay.banon)
*/
public class ScriptModule extends AbstractModule {
private final Settings settings;
private final List<Class<? extends ScriptEngineService>> scriptEngines = Lists.newArrayList();
private final Map<String, Class<? extends NativeScriptFactory>> scripts = Maps.newHashMap();
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);
}
@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());
}
// now, check for config based ones
Map<String, Settings> nativeSettings = settings.getGroups("script.native");
for (Map.Entry<String, Settings> entry : nativeSettings.entrySet()) {
String name = entry.getKey();
Class<? extends NativeScriptFactory> type = entry.getValue().getAsClass("type", NativeScriptFactory.class);
if (type == NativeScriptFactory.class) {
throw new ElasticSearchIllegalArgumentException("type is missing for native script [" + name + "]");
}
scriptsBinder.addBinding(name).to(type);
}
Multibinder<ScriptEngineService> multibinder = Multibinder.newSetBinder(binder(), ScriptEngineService.class);
multibinder.addBinding().to(NativeScriptEngineService.class);
try {
multibinder.addBinding().to(MvelScriptEngineService.class);
} catch (Throwable t) {
// no MVEL
}
for (Class<? extends ScriptEngineService> scriptEngine : scriptEngines) {
multibinder.addBinding().to(scriptEngine);
}
bind(ScriptService.class).asEagerSingleton();
}
}