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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.index.codec;
import com.google.common.collect.ImmutableMap;
import org.apache.lucene.codecs.Codec;
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.docvaluesformat.DocValuesFormatService;
import org.elasticsearch.index.codec.postingsformat.PostingsFormatService;
import org.elasticsearch.index.mapper.MapperService;
import org.elasticsearch.index.settings.IndexSettings;
/**
* Since Lucene 4.0 low level index segments are read and written through a
* codec layer that allows to use use-case specific file formats &
* data-structures per field. Elasticsearch exposes the full
* {@link Codec} capabilities through this {@link CodecService}.
*
* @see PostingsFormatService
* @see DocValuesFormatService
*/
public class CodecService extends AbstractIndexComponent {
public static final String INDEX_CODEC_BLOOM_LOAD = "index.codec.bloom.load";
public static final boolean INDEX_CODEC_BLOOM_LOAD_DEFAULT = false;
private final PostingsFormatService postingsFormatService;
private final DocValuesFormatService docValuesFormatService;
private final MapperService mapperService;
private final ImmutableMap<String, Codec> codecs;
private volatile boolean loadBloomFilter = true;
public final static String DEFAULT_CODEC = "default";
public CodecService(Index index) {
this(index, ImmutableSettings.Builder.EMPTY_SETTINGS);
}
public CodecService(Index index, @IndexSettings Settings indexSettings) {
this(index, indexSettings, new PostingsFormatService(index, indexSettings), new DocValuesFormatService(index, indexSettings), null);
}
@Inject
public CodecService(Index index, @IndexSettings Settings indexSettings, PostingsFormatService postingsFormatService,
DocValuesFormatService docValuesFormatService, MapperService mapperService) {
super(index, indexSettings);
this.postingsFormatService = postingsFormatService;
this.docValuesFormatService = docValuesFormatService;
this.mapperService = mapperService;
MapBuilder<String, Codec> codecs = MapBuilder.<String, Codec>newMapBuilder();
if (mapperService == null) {
codecs.put(DEFAULT_CODEC, Codec.getDefault());
} else {
codecs.put(DEFAULT_CODEC, new PerFieldMappingPostingFormatCodec(mapperService,
postingsFormatService.get(PostingsFormatService.DEFAULT_FORMAT).get(),
docValuesFormatService.get(DocValuesFormatService.DEFAULT_FORMAT).get(), logger));
}
for (String codec : Codec.availableCodecs()) {
codecs.put(codec, Codec.forName(codec));
}
this.codecs = codecs.immutableMap();
this.loadBloomFilter = indexSettings.getAsBoolean(INDEX_CODEC_BLOOM_LOAD, INDEX_CODEC_BLOOM_LOAD_DEFAULT);
}
public PostingsFormatService postingsFormatService() {
return this.postingsFormatService;
}
public DocValuesFormatService docValuesFormatService() {
return docValuesFormatService;
}
public MapperService mapperService() {
return mapperService;
}
public Codec codec(String name) throws ElasticsearchIllegalArgumentException {
Codec codec = codecs.get(name);
if (codec == null) {
throw new ElasticsearchIllegalArgumentException("failed to find codec [" + name + "]");
}
return codec;
}
public boolean isLoadBloomFilter() {
return this.loadBloomFilter;
}
public void setLoadBloomFilter(boolean loadBloomFilter) {
this.loadBloomFilter = loadBloomFilter;
}
}