| /* |
| * 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.search.stats; |
| |
| import java.lang.invoke.MethodHandles; |
| import java.util.Map; |
| import java.util.Map.Entry; |
| import java.util.concurrent.ConcurrentHashMap; |
| |
| import org.apache.solr.handler.component.ResponseBuilder; |
| import org.apache.solr.request.SolrQueryRequest; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * This class implements exact caching of statistics. It requires an additional |
| * round-trip to parse query at shard servers, and return term statistics for |
| * query terms (and collection statistics for term fields). |
| * <p>Global statistics are accumulated in the instance of this component (with the same life-cycle as |
| * SolrSearcher), in unbounded maps. NOTE: This may lead to excessive memory usage, in which case |
| * a {@link LRUStatsCache} should be considered.</p> |
| */ |
| public class ExactSharedStatsCache extends ExactStatsCache { |
| private static final Logger log = LoggerFactory.getLogger(MethodHandles.lookup().lookupClass()); |
| |
| // local stats obtained from shard servers |
| private final Map<String,Map<String,TermStats>> perShardTermStats = new ConcurrentHashMap<>(); |
| private final Map<String,Map<String,CollectionStats>> perShardColStats = new ConcurrentHashMap<>(); |
| // global stats synchronized from the leader |
| private final Map<String,TermStats> currentGlobalTermStats = new ConcurrentHashMap<>(); |
| private final Map<String,CollectionStats> currentGlobalColStats = new ConcurrentHashMap<>(); |
| |
| @Override |
| protected StatsSource doGet(SolrQueryRequest req) { |
| if (log.isDebugEnabled()) { |
| log.debug("total={}, cache {}", currentGlobalColStats, currentGlobalTermStats.size()); |
| } |
| return new ExactStatsSource(statsCacheMetrics, currentGlobalTermStats, currentGlobalColStats); |
| } |
| |
| @Override |
| public void clear() { |
| super.clear(); |
| perShardTermStats.clear(); |
| perShardColStats.clear(); |
| currentGlobalTermStats.clear(); |
| currentGlobalColStats.clear(); |
| } |
| |
| @Override |
| protected void addToPerShardColStats(SolrQueryRequest req, String shard, |
| Map<String,CollectionStats> colStats) { |
| perShardColStats.put(shard, colStats); |
| } |
| |
| @Override |
| protected void printStats(SolrQueryRequest req) { |
| log.debug("perShardColStats={}, perShardTermStats={}", perShardColStats, perShardTermStats); |
| } |
| |
| @Override |
| protected void addToPerShardTermStats(SolrQueryRequest req, String shard, String termStatsString) { |
| Map<String,TermStats> termStats = StatsUtil |
| .termStatsMapFromString(termStatsString); |
| if (termStats != null) { |
| perShardTermStats.put(shard, termStats); |
| } |
| } |
| |
| protected Map<String,CollectionStats> getPerShardColStats(ResponseBuilder rb, String shard) { |
| return perShardColStats.get(shard); |
| } |
| |
| protected TermStats getPerShardTermStats(SolrQueryRequest req, String t, String shard) { |
| Map<String,TermStats> cache = perShardTermStats.get(shard); |
| return (cache != null) ? cache.get(t) : null; //Term doesn't exist in shard; |
| } |
| |
| protected void addToGlobalColStats(SolrQueryRequest req, |
| Entry<String,CollectionStats> e) { |
| currentGlobalColStats.put(e.getKey(), e.getValue()); |
| } |
| |
| protected void addToGlobalTermStats(SolrQueryRequest req, Entry<String,TermStats> e) { |
| currentGlobalTermStats.put(e.getKey(), e.getValue()); |
| } |
| } |