001    /*
002     * Sonar, open source software quality management tool.
003     * Copyright (C) 2008-2012 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.rule;
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.core.rule.DefaultRuleFinder;
028    import org.sonar.jpa.session.DatabaseSessionFactory;
029    
030    import java.util.Map;
031    
032    public final class CacheRuleFinder extends DefaultRuleFinder {
033    
034      private BiMap<Integer, Rule> rulesById = HashBiMap.create();
035      private Map<String, Map<String, Rule>> rulesByKey = Maps.newHashMap();
036    
037      public CacheRuleFinder(DatabaseSessionFactory sessionFactory) {
038        super(sessionFactory);
039      }
040    
041      @Override
042      public Rule findById(int ruleId) {
043        Rule rule = rulesById.get(ruleId);
044        if (rule == null) {
045          rule = doFindById(ruleId);
046          if (rule != null) {
047            loadRepository(rule.getRepositoryKey());
048          }
049        }
050        return rule;
051      }
052    
053      @Override
054      public Rule findByKey(String repositoryKey, String ruleKey) {
055        Map<String, Rule> repository = loadRepository(repositoryKey);
056        return repository.get(ruleKey);
057      }
058    
059      private Map<String, Rule> loadRepository(String repositoryKey) {
060        Map<String, Rule> repository = rulesByKey.get(repositoryKey);
061        if (repository == null) {
062          repository = Maps.newHashMap();
063          rulesByKey.put(repositoryKey, repository);
064    
065          for (Rule rule : findAll(RuleQuery.create().withRepositoryKey(repositoryKey))) {
066            repository.put(rule.getKey(), rule);
067            rulesById.put(rule.getId(), rule);
068          }
069        }
070        return repository;
071      }
072    }