| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF 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.apache.solr.schema; |
| |
| import org.apache.lucene.index.IndexReader; |
| import org.apache.solr.common.util.NamedList; |
| import org.apache.solr.core.AbstractSolrEventListener; |
| import org.apache.solr.core.SolrCore; |
| import org.apache.solr.search.SolrIndexSearcher; |
| import org.apache.solr.search.function.FileFloatSource; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.lang.invoke.MethodHandles; |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| /** |
| * An event listener to reload ExternalFileFields for new searchers. |
| * |
| * Opening a new IndexSearcher will invalidate the internal caches used by |
| * {@link ExternalFileField}. By default, these caches are reloaded lazily |
| * by the first search that uses them. For large external files, this can |
| * slow down searches unacceptably. |
| * |
| * To reload the caches when the searcher is first opened, set up event |
| * listeners in your solrconfig.xml: |
| * |
| * <pre> |
| * <listener event="newSearcher" class="org.apache.solr.schema.ExternalFileFieldReloader"/> |
| * <listener event="firstSearcher" class="org.apache.solr.schema.ExternalFileFieldReloader"/> |
| * </pre> |
| * |
| * The caches will be reloaded for all ExternalFileFields in your schema after |
| * each commit. |
| */ |
| public class ExternalFileFieldReloader extends AbstractSolrEventListener { |
| |
| private String datadir; |
| private List<FileFloatSource> fieldSources = new ArrayList<>(); |
| |
| private static final Logger log = LoggerFactory.getLogger(MethodHandles.lookup().lookupClass()); |
| |
| public ExternalFileFieldReloader(SolrCore core) { |
| super(core); |
| datadir = core.getDataDir(); |
| } |
| |
| @Override |
| public void init(@SuppressWarnings({"rawtypes"})NamedList args) { |
| cacheFieldSources(getCore().getLatestSchema()); |
| } |
| |
| @Override |
| public void newSearcher(SolrIndexSearcher newSearcher, SolrIndexSearcher currentSearcher) { |
| // We need to reload the caches for the new searcher |
| if (null == currentSearcher || newSearcher.getSchema() != currentSearcher.getSchema()) { |
| cacheFieldSources(newSearcher.getSchema()); |
| } |
| IndexReader reader = newSearcher.getIndexReader(); |
| for (FileFloatSource fieldSource : fieldSources) { |
| fieldSource.refreshCache(reader); |
| } |
| } |
| |
| /** Caches FileFloatSource's from all ExternalFileField instances in the schema */ |
| public void cacheFieldSources(IndexSchema schema) { |
| fieldSources.clear(); |
| for (SchemaField field : schema.getFields().values()) { |
| FieldType type = field.getType(); |
| if (type instanceof ExternalFileField) { |
| ExternalFileField eff = (ExternalFileField)type; |
| fieldSources.add(eff.getFileFloatSource(field, datadir)); |
| if (log.isInfoEnabled()) { |
| log.info("Adding ExternalFileFieldReloader listener for field {}", field.getName()); |
| } |
| } |
| } |
| } |
| } |