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java

/*
 * Copyright 2010-2022 the original author or authors.
 *
 * Licensed 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
 *
 *    https://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.mybatis.spring;

import static org.springframework.util.Assert.notNull;

import org.apache.ibatis.exceptions.PersistenceException;
import org.apache.ibatis.mapping.Environment;
import org.apache.ibatis.session.ExecutorType;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.mybatis.logging.Logger;
import org.mybatis.logging.LoggerFactory;
import org.mybatis.spring.transaction.SpringManagedTransactionFactory;
import org.springframework.dao.DataAccessException;
import org.springframework.dao.TransientDataAccessResourceException;
import org.springframework.dao.support.PersistenceExceptionTranslator;
import org.springframework.jdbc.datasource.DataSourceUtils;
import org.springframework.transaction.support.TransactionSynchronizationAdapter;
import org.springframework.transaction.support.TransactionSynchronizationManager;

/**
 * Handles MyBatis SqlSession life cycle. It can register and get SqlSessions from Spring
 * {@code TransactionSynchronizationManager}. Also works if no transaction is active.
 *
 * @author Hunter Presnall
 * @author Eduardo Macarron
 */
public final class SqlSessionUtils {

  private static final Logger LOGGER = LoggerFactory.getLogger(SqlSessionUtils.class);

  private static final String NO_EXECUTOR_TYPE_SPECIFIED = "No ExecutorType specified";
  private static final String NO_SQL_SESSION_FACTORY_SPECIFIED = "No SqlSessionFactory specified";
  private static final String NO_SQL_SESSION_SPECIFIED = "No SqlSession specified";

  /**
   * This class can't be instantiated, exposes static utility methods only.
   */
  private SqlSessionUtils() {
    // do nothing
  }

  /**
   * Creates a new MyBatis {@code SqlSession} from the {@code SqlSessionFactory} provided as a parameter and using its
   * {@code DataSource} and {@code ExecutorType}
   *
   * @param sessionFactory
   *          a MyBatis {@code SqlSessionFactory} to create new sessions
   *
   * @return a MyBatis {@code SqlSession}
   *
   * @throws TransientDataAccessResourceException
   *           if a transaction is active and the {@code SqlSessionFactory} is not using a
   *           {@code SpringManagedTransactionFactory}
   */
  public static SqlSession getSqlSession(SqlSessionFactory sessionFactory) {
    ExecutorType executorType = sessionFactory.getConfiguration().getDefaultExecutorType();
    return getSqlSession(sessionFactory, executorType, null);
  }
}

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