/*
 * ToroDB
 * Copyright © 2014 8Kdata Technology (www.8kdata.com)
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */

package com.torodb.torod.impl.sql;

import com.torodb.core.exceptions.user.UserException;
import com.torodb.core.transaction.ExclusiveWriteInternalTransaction;
import com.torodb.core.transaction.RollbackException;
import com.torodb.core.transaction.metainf.MetaCollection;
import com.torodb.core.transaction.metainf.MutableMetaCollection;
import com.torodb.core.transaction.metainf.MutableMetaDatabase;
import com.torodb.torod.ExclusiveWriteTorodTransaction;

/**
 *
 */
public class SqlExclusiveWriteTorodTransaction
    extends SqlWriteTorodTransaction<ExclusiveWriteInternalTransaction>
    implements ExclusiveWriteTorodTransaction {

  public SqlExclusiveWriteTorodTransaction(SqlTorodConnection connection, boolean concurrent) {
    super(connection, concurrent);
  }

  @Override
  protected ExclusiveWriteInternalTransaction createInternalTransaction(
      SqlTorodConnection connection) {
    return connection
        .getServer()
        .getInternalTransactionManager()
        .openExclusiveWriteTransaction(getConnection().getBackendConnection());
  }

  @Override
  public void renameCollection(String fromDb, String fromCollection, String toDb,
      String toCollection) throws RollbackException, UserException {
    MutableMetaDatabase fromMetaDb = getMetaDatabaseOrThrowException(fromDb);
    MetaCollection fromMetaColl = getMetaCollectionOrThrowException(fromMetaDb, fromCollection);

    MutableMetaDatabase toMetaDb = getOrCreateMetaDatabase(toDb);
    MutableMetaCollection toMetaColl = createMetaCollection(toMetaDb, toCollection);

    getInternalTransaction().getBackendTransaction().renameCollection(fromMetaDb, fromMetaColl,
        toMetaDb, toMetaColl);

    fromMetaDb.removeMetaCollectionByName(fromCollection);
  }

}