content: /*
   * Copyright 1999-2018 Alibaba Group Holding Ltd.
   *
   * 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
   *
   *      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.alibaba.druid.pool;
  
  import com.alibaba.druid.util.JdbcUtils;
  import junit.framework.TestCase;
  import org.junit.Assert;
  
  import java.sql.Connection;
  import java.sql.PreparedStatement;
  import java.sql.ResultSet;
  import java.sql.Statement;
  
  public class TestRollBack extends TestCase {
      private DruidDataSource dataSource;
  
      protected void setUp() throws Exception {
          dataSource = new DruidDataSource();
          dataSource.setUrl("jdbc:mysql://a.b.c.d/druid?useUnicode=true&characterEncoding=UTF-8");
          dataSource.setUsername("dragoon_test");
          dataSource.setPassword("dragoon_test");
          dataSource.setFilters("stat,trace,encoding");
          dataSource.setDefaultAutoCommit(false);
  
          createTable();
      }
  
      protected void tearDown() throws Exception {
          dropTable();
          dataSource.close();
      }
  
      public void test_druid() throws Exception {
          Connection conn = null;
          try {
              conn = dataSource.getConnection();
  
              insert(conn, 1, "abc");
              insert(conn, 2, "1234567");
          } catch (Exception e) {
              conn.rollback();
          } finally {
              JdbcUtils.close(conn);
          }
  
          Assert.assertEquals(0, count());
      }
  
      public int count() throws Exception {
          Connection conn = null;
          Statement stmt = null;
          ResultSet rs = null;
          try {
              conn = dataSource.getConnection();
              stmt = conn.createStatement();
              rs = stmt.executeQuery("SELECT COUNT(*) FROM T_0");
              rs.next();
              return rs.getInt(1);
          } finally {
              JdbcUtils.close(rs);
              JdbcUtils.close(stmt);
              JdbcUtils.close(conn);
          }
      }
  
      private void insert(Connection conn, int id, String value) throws Exception {
          String sql = "insert into T_0 (ID, NAME) VALUES (?, ?)";
  
          PreparedStatement stmt = null;
  
          try {
              stmt = conn.prepareStatement(sql);
              stmt.setInt(1, id);
              stmt.setString(2, value);
              stmt.execute();
          } finally {
              JdbcUtils.close(stmt);
          }
      }
  
      private void dropTable() throws Exception {
          String ddl = "DROP TABLE T_0";
          Connection conn = dataSource.getConnection();
  
          Statement stmt = conn.createStatement();
          stmt.execute(ddl);
          stmt.close();
  
          conn.close();
      }
  
      private void createTable() throws Exception {
          String ddl = "CREATE TABLE T_0 (ID INT PRIMARY KEY, NAME VARCHAR(5))";
          Connection conn = dataSource.getConnection();
  
          Statement stmt = conn.createStatement();
          stmt.execute(ddl);
          stmt.close();
  
          conn.close();
      }
  }
  