在切换DataSource和选择模式时，Hibernate是否会产生多租户开销

Question

在下面给出的代码中，我试图在tenantIdentifier的基础上更改数据源和模式。

例如：

@Override
    protected DataSource selectDataSource(String tenantIdentifier) {
        try {
            InitialContext ic = new InitialContext();
            dataSource = (DataSource) ic.lookup(JNDI_NAME);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return dataSource;
    }

    @Override
    public Connection getConnection(String tenantIdentifier) throws SQLException {
        final Connection connection = selectDataSource(tenantIdentifier).getConnection();
        try {
            connection.createStatement().execute("select now()");
            connection.createStatement().execute("USE " + tenantIdentifier);
        } catch (final SQLException e) {
            throw new HibernateException("Error trying to alter schema [" + tenantIdentifier + "]", e);
        }
        return connection;
    }

Answer 1

切换DataSource和架构期间的小开销（以ms为单位）。