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1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one or more
3    * contributor license agreements.  See the NOTICE file distributed with
4    * this work for additional information regarding copyright ownership.
5    * The ASF licenses this file to You under the Apache License, Version 2.0
6    * (the "License"); you may not use this file except in compliance with
7    * the License.  You may obtain a copy of the License at
8    *
9    *     http://www.apache.org/licenses/LICENSE-2.0
10   *
11   * Unless required by applicable law or agreed to in writing, software
12   * distributed under the License is distributed on an "AS IS" BASIS,
13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14   * See the License for the specific language governing permissions and
15   * limitations under the License.
16   */
17  
18  package org.apache.shardingsphere.distsql.handler.engine.update.rdl.rule.engine.database.type;
19  
20  import lombok.RequiredArgsConstructor;
21  import org.apache.shardingsphere.distsql.handler.engine.update.rdl.rule.engine.database.DatabaseRuleOperator;
22  import org.apache.shardingsphere.distsql.handler.engine.update.rdl.rule.spi.database.DatabaseRuleAlterExecutor;
23  import org.apache.shardingsphere.distsql.statement.rdl.rule.database.DatabaseRuleDefinitionStatement;
24  import org.apache.shardingsphere.infra.config.rule.RuleConfiguration;
25  import org.apache.shardingsphere.infra.config.rule.decorator.RuleConfigurationDecorator;
26  import org.apache.shardingsphere.infra.metadata.database.ShardingSphereDatabase;
27  import org.apache.shardingsphere.infra.spi.type.typed.TypedSPILoader;
28  import org.apache.shardingsphere.mode.manager.ContextManager;
29  import org.apache.shardingsphere.mode.persist.service.MetaDataManagerPersistService;
30  
31  import java.util.LinkedHashMap;
32  import java.util.Map.Entry;
33  import java.util.stream.Collectors;
34  
35  /**
36   * Alter database rule operator.
37   */
38  @RequiredArgsConstructor
39  public final class AlterDatabaseRuleOperator implements DatabaseRuleOperator {
40      
41      private final ContextManager contextManager;
42      
43      @SuppressWarnings("rawtypes")
44      private final DatabaseRuleAlterExecutor executor;
45      
46      @Override
47      @SuppressWarnings("unchecked")
48      public void operate(final DatabaseRuleDefinitionStatement sqlStatement, final ShardingSphereDatabase database, final RuleConfiguration currentRuleConfig) {
49          RuleConfiguration toBeAlteredRuleConfig = executor.buildToBeAlteredRuleConfiguration(sqlStatement);
50          MetaDataManagerPersistService metaDataManagerPersistService = contextManager.getPersistServiceFacade().getModeFacade().getMetaDataManagerService();
51          metaDataManagerPersistService.alterRuleConfiguration(database, decorateRuleConfiguration(database, toBeAlteredRuleConfig));
52          RuleConfiguration toBeDroppedRuleConfig = executor.buildToBeDroppedRuleConfiguration(toBeAlteredRuleConfig);
53          metaDataManagerPersistService.removeRuleConfigurationItem(database, toBeDroppedRuleConfig);
54      }
55      
56      @SuppressWarnings("unchecked")
57      private RuleConfiguration decorateRuleConfiguration(final ShardingSphereDatabase database, final RuleConfiguration ruleConfig) {
58          return TypedSPILoader.findService(RuleConfigurationDecorator.class, ruleConfig.getClass()).map(optional -> optional.decorate(database.getName(),
59                  database.getResourceMetaData().getStorageUnits().entrySet().stream()
60                          .collect(Collectors.toMap(Entry::getKey, entry -> entry.getValue().getDataSource(), (oldValue, currentValue) -> oldValue, LinkedHashMap::new)),
61                  database.getRuleMetaData().getRules(), ruleConfig)).orElse(ruleConfig);
62      }
63  }