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Viewing changes to solr/core/src/java/org/apache/solr/search/grouping/distributed/responseprocessor/SearchGroupShardResponseProcessor.java

  • Committer: Sebastian Meyer
  • Date: 2012-08-03 09:12:40 UTC
  • Revision ID: sebastian.meyer@slub-dresden.de-20120803091240-x6861b0vabq1xror
https://launchpad.net/bugs/985487
Remove Lucene and Solr source code and add patches instead
Fix Bug #985487: Auto-suggestion for the search interface

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solr/core/src/java/org/apache/solr/search/grouping/distributed/responseprocessor/SearchGroupShardResponseProcessor.java
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package org.apache.solr.search.grouping.distributed.responseprocessor;
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/*
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 * Licensed to the Apache Software Foundation (ASF) under one or more
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 * contributor license agreements.  See the NOTICE file distributed with
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 * this work for additional information regarding copyright ownership.
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 * The ASF licenses this file to You under the Apache License, Version 2.0
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 * (the "License"); you may not use this file except in compliance with
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 * the License.  You may obtain a copy of the License at
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 *
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 *     http://www.apache.org/licenses/LICENSE-2.0
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 *
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 * Unless required by applicable law or agreed to in writing, software
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 * distributed under the License is distributed on an "AS IS" BASIS,
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 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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 * See the License for the specific language governing permissions and
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 * limitations under the License.
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 */
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import org.apache.lucene.search.Sort;
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import org.apache.lucene.search.grouping.SearchGroup;
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import org.apache.solr.common.SolrException;
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import org.apache.solr.common.util.NamedList;
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import org.apache.solr.handler.component.ResponseBuilder;
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import org.apache.solr.handler.component.ShardRequest;
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import org.apache.solr.handler.component.ShardResponse;
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import org.apache.solr.search.SortSpec;
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import org.apache.solr.search.grouping.distributed.ShardResponseProcessor;
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import org.apache.solr.search.grouping.distributed.shardresultserializer.SearchGroupsResultTransformer;
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import java.io.IOException;
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import java.util.*;
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/**
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 * Concrete implementation for merging {@link SearchGroup} instances from shard responses.
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 */
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public class SearchGroupShardResponseProcessor implements ShardResponseProcessor {
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  /**
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   * {@inheritDoc}
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   */
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  public void process(ResponseBuilder rb, ShardRequest shardRequest) {
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    SortSpec ss = rb.getSortSpec();
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    Sort groupSort = rb.getGroupingSpec().getGroupSort();
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    String[] fields = rb.getGroupingSpec().getFields();
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    Map<String, List<Collection<SearchGroup<String>>>> commandSearchGroups = new HashMap<String, List<Collection<SearchGroup<String>>>>();
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    Map<String, Map<SearchGroup<String>, String>> tempSearchGroupToShard = new HashMap<String, Map<SearchGroup<String>, String>>();
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    for (String field : fields) {
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      commandSearchGroups.put(field, new ArrayList<Collection<SearchGroup<String>>>(shardRequest.responses.size()));
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      tempSearchGroupToShard.put(field, new HashMap<SearchGroup<String>, String>());
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      if (!rb.searchGroupToShard.containsKey(field)) {
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        rb.searchGroupToShard.put(field, new HashMap<SearchGroup<String>, String>());
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      }
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    }
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    SearchGroupsResultTransformer serializer = new SearchGroupsResultTransformer(rb.req.getSearcher());
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    try {
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      for (ShardResponse srsp : shardRequest.responses) {
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        @SuppressWarnings("unchecked")
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        NamedList<NamedList> firstPhaseResult = (NamedList<NamedList>) srsp.getSolrResponse().getResponse().get("firstPhase");
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        Map<String, Collection<SearchGroup<String>>> result = serializer.transformToNative(firstPhaseResult, groupSort, null, srsp.getShard());
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        for (String field : commandSearchGroups.keySet()) {
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          Collection<SearchGroup<String>> searchGroups = result.get(field);
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          if (searchGroups == null) {
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            continue;
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          }
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          commandSearchGroups.get(field).add(searchGroups);
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          for (SearchGroup<String> searchGroup : searchGroups) {
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            tempSearchGroupToShard.get(field).put(searchGroup, srsp.getShard());
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          }
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        }
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      }
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      for (String groupField : commandSearchGroups.keySet()) {
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        List<Collection<SearchGroup<String>>> topGroups = commandSearchGroups.get(groupField);
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        Collection<SearchGroup<String>> mergedTopGroups = SearchGroup.merge(topGroups, ss.getOffset(), ss.getCount(), groupSort);
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        if (mergedTopGroups == null) {
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          continue;
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        }
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        rb.mergedSearchGroups.put(groupField, mergedTopGroups);
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        for (SearchGroup<String> mergedTopGroup : mergedTopGroups) {
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          rb.searchGroupToShard.get(groupField).put(mergedTopGroup, tempSearchGroupToShard.get(groupField).get(mergedTopGroup));
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        }
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      }
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    } catch (IOException e) {
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      throw new SolrException(SolrException.ErrorCode.SERVER_ERROR, e);
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    }
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  }
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}