001    /*
002     * Sonar, open source software quality management tool.
003     * Copyright (C) 2008-2011 SonarSource
004     * mailto:contact AT sonarsource DOT com
005     *
006     * Sonar is free software; you can redistribute it and/or
007     * modify it under the terms of the GNU Lesser General Public
008     * License as published by the Free Software Foundation; either
009     * version 3 of the License, or (at your option) any later version.
010     *
011     * Sonar is distributed in the hope that it will be useful,
012     * but WITHOUT ANY WARRANTY; without even the implied warranty of
013     * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
014     * Lesser General Public License for more details.
015     *
016     * You should have received a copy of the GNU Lesser General Public
017     * License along with Sonar; if not, write to the Free Software
018     * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02
019     */
020    package org.sonar.core.components;
021    
022    import com.google.common.collect.BiMap;
023    import com.google.common.collect.HashBiMap;
024    import com.google.common.collect.Maps;
025    import org.sonar.api.rules.Rule;
026    import org.sonar.api.rules.RuleQuery;
027    import org.sonar.jpa.session.DatabaseSessionFactory;
028    
029    import java.util.Map;
030    
031    public final class CacheRuleFinder extends DefaultRuleFinder {
032    
033      private BiMap<Integer, Rule> rulesById = HashBiMap.create();
034      private Map<String, Map<String, Rule>> rulesByKey = Maps.newHashMap();
035    
036      public CacheRuleFinder(DatabaseSessionFactory sessionFactory) {
037        super(sessionFactory);
038      }
039    
040      @Override
041      public Rule findById(int ruleId) {
042        Rule rule = rulesById.get(ruleId);
043        if (rule == null) {
044          rule = doFindById(ruleId);
045          if (rule != null) {
046            loadRepository(rule.getRepositoryKey());
047          }
048        }
049        return rule;
050      }
051    
052      @Override
053      public Rule findByKey(String repositoryKey, String ruleKey) {
054        Map<String, Rule> repository = loadRepository(repositoryKey);
055        return repository.get(ruleKey);
056      }
057    
058      private Map<String, Rule> loadRepository(String repositoryKey) {
059        Map<String, Rule> repository = rulesByKey.get(repositoryKey);
060        if (repository == null) {
061          repository = Maps.newHashMap();
062          rulesByKey.put(repositoryKey, repository);
063    
064          for (Rule rule : findAll(RuleQuery.create().withRepositoryKey(repositoryKey))) {
065            repository.put(rule.getKey(), rule);
066            rulesById.put(rule.getId(), rule);
067          }
068        }
069        return repository;
070      }
071    }