/*
* Licensed to ElasticSearch and Shay Banon 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.plugins;
import com.google.common.collect.ImmutableList;
import org.elasticsearch.common.component.LifecycleComponent;
import org.elasticsearch.common.inject.Module;
import org.elasticsearch.common.settings.ImmutableSettings;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.index.CloseableIndexComponent;
import java.util.Collection;
/**
* A base class for a plugin.
* <p/>
* A plugin can be dynamically injected with {@link Module} by implementing <tt>onModule(AnyModule)</tt> method
* removing the need to override {@link #processModule(org.elasticsearch.common.inject.Module)} and check using
* instanceof.
*/
public abstract class AbstractPlugin implements Plugin {
/**
* Defaults to return an empty list.
*/
@Override
public Collection<Class<? extends Module>> modules() {
return ImmutableList.of();
}
/**
* Defaults to return an empty list.
*/
@Override
public Collection<Module> modules(Settings settings) {
return ImmutableList.of();
}
/**
* Defaults to return an empty list.
*/
@Override
public Collection<Class<? extends LifecycleComponent>> services() {
return ImmutableList.of();
}
/**
* Defaults to return an empty list.
*/
@Override
public Collection<Class<? extends Module>> indexModules() {
return ImmutableList.of();
}
/**
* Defaults to return an empty list.
*/
@Override
public Collection<Module> indexModules(Settings settings) {
return ImmutableList.of();
}
/**
* Defaults to return an empty list.
*/
@Override
public Collection<Class<? extends CloseableIndexComponent>> indexServices() {
return ImmutableList.of();
}
/**
* Defaults to return an empty list.
*/
@Override
public Collection<Class<? extends Module>> shardModules() {
return ImmutableList.of();
}
/**
* Defaults to return an empty list.
*/
@Override
public Collection<Module> shardModules(Settings settings) {
return ImmutableList.of();
}
/**
* Defaults to return an empty list.
*/
@Override
public Collection<Class<? extends CloseableIndexComponent>> shardServices() {
return ImmutableList.of();
}
@Override
public void processModule(Module module) {
// nothing to do here
}
@Override
public Settings additionalSettings() {
return ImmutableSettings.Builder.EMPTY_SETTINGS;
}
}