org.elasticsearch.index.codec.postingsformat.PostingsFormatService Maven / Gradle / Ivy
/*
* 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.index.codec.postingsformat;
import com.google.common.collect.ImmutableMap;
import org.elasticsearch.ElasticsearchIllegalArgumentException;
import org.elasticsearch.common.collect.MapBuilder;
import org.elasticsearch.common.inject.Inject;
import org.elasticsearch.common.settings.ImmutableSettings;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.index.AbstractIndexComponent;
import org.elasticsearch.index.Index;
import org.elasticsearch.index.codec.CodecService;
import org.elasticsearch.index.settings.IndexSettings;
import java.util.Map;
/**
* The {@link PostingsFormatService} provides access to
* all configured {@link PostingsFormatProvider} instances by
* {@link PostingsFormatProvider#name() name}.
*
* @see CodecService
*/
public class PostingsFormatService extends AbstractIndexComponent {
private final ImmutableMap providers;
public final static String DEFAULT_FORMAT = "default";
public PostingsFormatService(Index index) {
this(index, ImmutableSettings.Builder.EMPTY_SETTINGS);
}
public PostingsFormatService(Index index, @IndexSettings Settings indexSettings) {
this(index, indexSettings, ImmutableMap.of());
}
@Inject
public PostingsFormatService(Index index, @IndexSettings Settings indexSettings, Map postingFormatFactories) {
super(index, indexSettings);
MapBuilder providers = MapBuilder.newMapBuilder();
Map postingsFormatSettings = indexSettings.getGroups(PostingsFormatProvider.POSTINGS_FORMAT_SETTINGS_PREFIX);
for (Map.Entry entry : postingFormatFactories.entrySet()) {
String name = entry.getKey();
PostingsFormatProvider.Factory factory = entry.getValue();
Settings settings = postingsFormatSettings.get(name);
if (settings == null) {
settings = ImmutableSettings.Builder.EMPTY_SETTINGS;
}
providers.put(name, factory.create(name, settings));
}
// This is only needed for tests when guice doesn't have the chance to populate the list of PF factories
for (PreBuiltPostingsFormatProvider.Factory factory : PostingFormats.listFactories()) {
if (providers.containsKey(factory.name())) {
continue;
}
providers.put(factory.name(), factory.get());
}
this.providers = providers.immutableMap();
}
public PostingsFormatProvider get(String name) throws ElasticsearchIllegalArgumentException {
PostingsFormatProvider provider = providers.get(name);
if (provider == null) {
throw new ElasticsearchIllegalArgumentException("failed to find postings_format [" + name + "]");
}
return provider;
}
}