org.apache.ibatis.session.TransactionIsolationLevel Java Examples

private SqlSession openSessionFromDataSource(ExecutorType execType, TransactionIsolationLevel level, boolean autoCommit) {
  Transaction tx = null;
  try {
    final Environment environment = configuration.getEnvironment();
    final TransactionFactory transactionFactory = getTransactionFactoryFromEnvironment(environment);
    //通过事务工厂来产生一个事务
    tx = transactionFactory.newTransaction(environment.getDataSource(), level, autoCommit);
    //生成一个执行器(事务包含在执行器里)
    final Executor executor = configuration.newExecutor(tx, execType);
    //然后产生一个DefaultSqlSession
    return new DefaultSqlSession(configuration, executor, autoCommit);
  } catch (Exception e) {
    //如果打开事务出错，则关闭它
    closeTransaction(tx); // may have fetched a connection so lets call close()
    throw ExceptionFactory.wrapException("Error opening session.  Cause: " + e, e);
  } finally {
    //最后清空错误上下文
    ErrorContext.instance().reset();
  }
}
 

private SqlSession openSessionFromDataSource(ExecutorType execType, TransactionIsolationLevel level, boolean autoCommit) {
  Transaction tx = null;
  try {
    final Environment environment = configuration.getEnvironment();
    final TransactionFactory transactionFactory = getTransactionFactoryFromEnvironment(environment);
    //通过事务工厂来产生一个事务
    tx = transactionFactory.newTransaction(environment.getDataSource(), level, autoCommit);
    //生成一个执行器(事务包含在执行器里)
    final Executor executor = configuration.newExecutor(tx, execType);
    //然后产生一个DefaultSqlSession
    return new DefaultSqlSession(configuration, executor, autoCommit);
  } catch (Exception e) {
    //如果打开事务出错，则关闭它
    closeTransaction(tx); // may have fetched a connection so lets call close()
    throw ExceptionFactory.wrapException("Error opening session.  Cause: " + e, e);
  } finally {
    //最后清空错误上下文
    ErrorContext.instance().reset();
  }
}
 

@Override
public Transaction newTransaction(DataSource ds, TransactionIsolationLevel level, boolean autoCommit) {
  // Silently ignores autocommit and isolation level, as managed transactions are entirely
  // controlled by an external manager.  It's silently ignored so that
  // code remains portable between managed and unmanaged configurations.
  return new ManagedTransaction(ds, level, closeConnection);
}
 

@Override
public Transaction newTransaction(DataSource ds, TransactionIsolationLevel level, boolean autoCommit) {
  // Silently ignores autocommit and isolation level, as managed transactions are entirely
  // controlled by an external manager.  It's silently ignored so that
  // code remains portable between managed and unmanaged configurations.
  return new ManagedTransaction(ds, level, closeConnection);
}
 

public Transaction newTransaction(DataSource dataSource, TransactionIsolationLevel level, boolean autoCommit) {
	return new MybatisTransaction(dataSource);
}
 

public SqlSession openSession(ExecutorType execType, TransactionIsolationLevel level) {
  return wrappedSessionFactory.openSession(execType, level);
}
 

public SqlSession openSession(TransactionIsolationLevel level) {
  return wrappedSessionFactory.openSession(level);
}
 

@Override
public SqlSession openSession(ExecutorType execType, TransactionIsolationLevel level) {
  return openSessionFromDataSource(execType, level, false);
}
 

@Override
public SqlSession openSession(TransactionIsolationLevel level) {
  return openSessionFromDataSource(configuration.getDefaultExecutorType(), level, false);
}
 

public ManagedTransaction(DataSource ds, TransactionIsolationLevel level, boolean closeConnection) {
  this.dataSource = ds;
  this.level = level;
  this.closeConnection = closeConnection;
}
 

@Override
public Transaction newTransaction(DataSource ds, TransactionIsolationLevel level, boolean autoCommit) {
  return new JdbcTransaction(ds, level, autoCommit);
}
 

public JdbcTransaction(DataSource ds, TransactionIsolationLevel desiredLevel, boolean desiredAutoCommit) {
  dataSource = ds;
  level = desiredLevel;
  autoCommmit = desiredAutoCommit;
}
 

@Override
public Transaction newTransaction(DataSource dataSource,
		TransactionIsolationLevel level, boolean autoCommit) {
	return new RoutingSpringManagedTransaction(dataSource);
}
 

@Override
public Transaction newTransaction(DataSource dataSource, TransactionIsolationLevel level, boolean autoCommit) {
    return new MultiDataSourceTransaction(dataSource);
}
 

@Override
public SqlSession openSession(ExecutorType execType, TransactionIsolationLevel level) {
  return openSessionFromDataSource(execType, level, false);
}
 

@Override
public SqlSession openSession(TransactionIsolationLevel level) {
  return openSessionFromDataSource(configuration.getDefaultExecutorType(), level, false);
}
 

public ManagedTransaction(DataSource ds, TransactionIsolationLevel level, boolean closeConnection) {
  this.dataSource = ds;
  this.level = level;
  this.closeConnection = closeConnection;
}
 

@Override
public Transaction newTransaction(DataSource ds, TransactionIsolationLevel level, boolean autoCommit) {
  return new JdbcTransaction(ds, level, autoCommit);
}
 

public JdbcTransaction(DataSource ds, TransactionIsolationLevel desiredLevel, boolean desiredAutoCommit) {
  dataSource = ds;
  level = desiredLevel;
  autoCommmit = desiredAutoCommit;
}
 

@Override
public Transaction newTransaction(DataSource ds, TransactionIsolationLevel level, boolean autoCommit) {
    return new ActivitiTransaction(ds, level, autoCommit);
}
 

ActivitiTransaction(DataSource ds, TransactionIsolationLevel desiredLevel, boolean desiredAutoCommit) {
    dataSource = ds;
    level = desiredLevel;
    autoCommit = desiredAutoCommit;
}
 

@Override
public SqlSession openSession(ExecutorType execType, TransactionIsolationLevel level)
{
    SqlSession sqlSession = super.openSession(execType, level);
    return buildSqlSessionMetricsWrapper(sqlSession);
}
 

@Override
public SqlSession openSession(TransactionIsolationLevel level)
{
    SqlSession sqlSession = super.openSession(level);
    return buildSqlSessionMetricsWrapper(sqlSession);
}
 

/**
 * このメソッドは委譲先ファクトリが返却したSqlSessionをラップして返却します。
 * @param level トランザクションの分離レベル
 * @return SqlSessionのインスタンス
 */
public SqlSession openSession(TransactionIsolationLevel level) {
    return wrap(delegate.openSession(level));
}
 

/**
 * このメソッドは委譲先ファクトリが返却したSqlSessionをラップして返却します。
 * @param execType 実行タイプ
 * @param level トランザクションの分離レベル
 * @return SqlSessionのインスタンス
 */
public SqlSession openSession(ExecutorType execType,
        TransactionIsolationLevel level) {
    return wrap(delegate.openSession(execType, level));
}
 

/**
 * Creates a {@link Transaction} out of a datasource.
 * @param dataSource DataSource to take the connection from
 * @param level Desired isolation level
 * @param autoCommit Desired autocommit
 * @return Transaction
 * @since 3.1.0
 */
//根据数据源和事务隔离级别创建Transaction
Transaction newTransaction(DataSource dataSource, TransactionIsolationLevel level, boolean autoCommit);
 

/**
 * Creates a {@link Transaction} out of a datasource.
 * @param dataSource DataSource to take the connection from
 * @param level Desired isolation level
 * @param autoCommit Desired autocommit
 * @return Transaction
 * @since 3.1.0
 */
//根据数据源和事务隔离级别创建Transaction
Transaction newTransaction(DataSource dataSource, TransactionIsolationLevel level, boolean autoCommit);