org.apache.solr.analytics.AnalyticsDriver.java Source code

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Here is the source code for org.apache.solr.analytics.AnalyticsDriver.java

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/*
 * 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.analytics;

import java.io.IOException;
import java.util.List;

import org.apache.lucene.index.LeafReaderContext;
import org.apache.lucene.search.DocIdSet;
import org.apache.lucene.search.DocIdSetIterator;
import org.apache.solr.analytics.AnalyticsRequestManager.StreamingInfo;
import org.apache.solr.analytics.facet.AbstractSolrQueryFacet.FacetValueQueryExecuter;
import org.apache.solr.analytics.facet.StreamingFacet;
import org.apache.solr.analytics.function.ReductionCollectionManager;
import org.apache.solr.request.SolrQueryRequest;
import org.apache.solr.search.Filter;
import org.apache.solr.search.SolrIndexSearcher;

public class AnalyticsDriver {

    /**
     * Drive the collection of reduction data. This includes overall data as well as faceted data.
     * 
     * @param manager of the request to drive
     * @param searcher the results of the query
     * @param filter that represents the overall query
     * @param queryRequest used for the search request
     * @throws IOException if an error occurs while reading from Solr
     */
    public static void drive(AnalyticsRequestManager manager, SolrIndexSearcher searcher, Filter filter,
            SolrQueryRequest queryRequest) throws IOException {
        StreamingInfo streamingInfo = manager.getStreamingFacetInfo();
        Iterable<StreamingFacet> streamingFacets = streamingInfo.streamingFacets;
        ReductionCollectionManager collectionManager = streamingInfo.streamingCollectionManager;

        Iterable<FacetValueQueryExecuter> facetExecuters = manager.getFacetExecuters(filter, queryRequest);

        // Streaming phase (Overall results & Value/Pivot Facets)
        // Loop through all documents and collect reduction data for streaming facets and overall results
        if (collectionManager.needsCollection()) {
            List<LeafReaderContext> contexts = searcher.getTopReaderContext().leaves();
            for (int leafNum = 0; leafNum < contexts.size(); leafNum++) {
                LeafReaderContext context = contexts.get(leafNum);
                DocIdSet dis = filter.getDocIdSet(context, null); // solr docsets already exclude any deleted docs
                if (dis == null) {
                    continue;
                }
                DocIdSetIterator disi = dis.iterator();
                if (disi != null) {
                    collectionManager.doSetNextReader(context);
                    int doc = disi.nextDoc();
                    while (doc != DocIdSetIterator.NO_MORE_DOCS) {
                        // Add a document to the statistics being generated
                        collectionManager.collect(doc);
                        streamingFacets.forEach(facet -> facet.addFacetValueCollectionTargets());
                        collectionManager.apply();
                        doc = disi.nextDoc();
                    }
                }
            }
        }

        // Executing phase (Query/Range Facets)
        // Send additional Solr Queries to compute facet values
        for (FacetValueQueryExecuter executer : facetExecuters) {
            executer.execute(searcher);
        }
    }
}