content: // 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 com.cloud.upgrade.dao;
  
  import java.io.InputStream;
  import java.sql.Connection;
  import java.sql.PreparedStatement;
  import java.sql.SQLException;
  import java.util.ArrayList;
  import java.util.HashMap;
  import java.util.List;
  
  
  import com.cloud.utils.exception.CloudRuntimeException;
  
  public class Upgrade228to229 extends DbUpgradeAbstractImpl {
  
      @Override
      public String[] getUpgradableVersionRange() {
          return new String[] {"2.2.8", "2.2.8"};
      }
  
      @Override
      public String getUpgradedVersion() {
          return "2.2.9";
      }
  
      @Override
      public boolean supportsRollingUpgrade() {
          return true;
      }
  
      @Override
      public InputStream[] getPrepareScripts() {
          final String scriptFile = "META-INF/db/schema-228to229.sql";
          final InputStream script = Thread.currentThread().getContextClassLoader().getResourceAsStream(scriptFile);
          if (script == null) {
              throw new CloudRuntimeException("Unable to find " + scriptFile);
          }
  
          return new InputStream[] {script};
      }
  
      @Override
      public void performDataMigration(Connection conn) {
          dropKeysIfExist(conn);
          PreparedStatement pstmt;
          try {
              /*fk_cluster__data_center_id has been wrongly added in previous upgrade(not sure which one), 228to229 upgrade drops it and re-add again*/
              pstmt =
                  conn.prepareStatement("ALTER TABLE `cloud`.`cluster` ADD CONSTRAINT `fk_cluster__data_center_id` FOREIGN KEY (`data_center_id`) REFERENCES `cloud`.`data_center`(`id`) ON DELETE CASCADE");
              pstmt.executeUpdate();
  
              pstmt = conn.prepareStatement("ALTER TABLE `cloud`.`snapshots` ADD INDEX `i_snapshots__removed`(`removed`)");
              pstmt.executeUpdate();
  
              pstmt =
                  conn.prepareStatement("ALTER TABLE `cloud`.`network_tags` ADD CONSTRAINT `fk_network_tags__network_id` FOREIGN KEY (`network_id`) REFERENCES `networks`(`id`) ON DELETE CASCADE");
              pstmt.executeUpdate();
  
              pstmt.close();
  
          } catch (SQLException e) {
              throw new CloudRuntimeException("Unable to execute cluster update", e);
          }
      }
  
      @Override
      public InputStream[] getCleanupScripts() {
          return null;
      }
  
      private void dropKeysIfExist(Connection conn) {
          HashMap<String, List<String>> indexes = new HashMap<String, List<String>>();
          HashMap<String, List<String>> foreignKeys = new HashMap<String, List<String>>();
  
          //indexes to drop
          //for network_offering
          List<String> keys = new ArrayList<String>();
          keys.add("name");
          indexes.put("network_offerings", keys);
  
          //for snapshot
          keys = new ArrayList<String>();
          keys.add("i_snapshots__removed");
          indexes.put("snapshots", keys);
  
          //for domain router
          keys = new ArrayList<String>();
          keys.add("i_domain_router__public_ip_address");
          indexes.put("domain_router", keys);
  
          //for user_ip_address
          keys = new ArrayList<String>();
          keys.add("i_user_ip_address__public_ip_address");
          indexes.put("user_ip_address", keys);
  
          //foreign keys to drop - this key would be re-added later
          keys = new ArrayList<String>();
          keys.add("fk_cluster__data_center_id");
          foreignKeys.put("cluster", keys);
  
          keys = new ArrayList<String>();
          keys.add("fk_domain_router__public_ip_address");
          foreignKeys.put("domain_router", keys);
  
          //drop foreign key from network tags table - it would be re-added later
          keys = new ArrayList<String>();
          keys.add("fk_network_tags__network_id");
          foreignKeys.put("network_tags", keys);
  
          // drop all foreign keys first
          logger.debug("Dropping keys that don't exist in 2.2.6 version of the DB...");
          for (String tableName : foreignKeys.keySet()) {
              DbUpgradeUtils.dropKeysIfExist(conn, tableName, foreignKeys.get(tableName), true);
          }
  
          // drop indexes now
          for (String tableName : indexes.keySet()) {
              DbUpgradeUtils.dropKeysIfExist(conn, tableName, indexes.get(tableName), false);
          }
      }
  
  }
  