/*
    * 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.shardingsphere.transaction;
  
  import org.apache.shardingsphere.database.connector.core.type.DatabaseType;
  import org.apache.shardingsphere.infra.exception.ShardingSpherePreconditions;
  import org.apache.shardingsphere.infra.spi.type.typed.TypedSPILoader;
  import org.apache.shardingsphere.transaction.api.TransactionType;
  import org.apache.shardingsphere.transaction.exception.TransactionManagerNotFoundException;
  import org.apache.shardingsphere.transaction.spi.ShardingSphereDistributedTransactionManager;
  
  import javax.sql.DataSource;
  import java.util.Map;
  
  /**
   * ShardingSphere transaction manager engine.
   */
  public final class ShardingSphereTransactionManagerEngine {
      
      private final TransactionType transactionType;
      
      private final ShardingSphereDistributedTransactionManager distributedTransactionManager;
      
      public ShardingSphereTransactionManagerEngine(final TransactionType transactionType) {
          this.transactionType = transactionType;
          distributedTransactionManager = TransactionType.LOCAL == transactionType ? null : TypedSPILoader.getService(ShardingSphereDistributedTransactionManager.class, transactionType.name());
      }
      
      /**
       * Initialize transaction manager.
       *
       * @param databaseTypes database types
       * @param dataSourceMap data source map
       * @param providerType transaction manager provider type
       */
      public void init(final Map<String, DatabaseType> databaseTypes, final Map<String, DataSource> dataSourceMap, final String providerType) {
          if (TransactionType.LOCAL == transactionType) {
              return;
          }
          distributedTransactionManager.init(databaseTypes, dataSourceMap, providerType);
      }
      
      /**
       * Get transaction manager.
       *
       * @param transactionType transaction type
       * @return transaction manager
       */
      public ShardingSphereDistributedTransactionManager getTransactionManager(final TransactionType transactionType) {
          if (TransactionType.LOCAL != transactionType) {
              ShardingSpherePreconditions.checkNotNull(distributedTransactionManager, () -> new TransactionManagerNotFoundException(transactionType));
          }
          return distributedTransactionManager;
      }
      
      /**
       * Close transaction manager.
       */
      public void close() {
          if (TransactionType.LOCAL == transactionType) {
              return;
          }
          distributedTransactionManager.close();
      }
  }