content: /*
   * Copyright 2021 4Paradigm
   *
   * 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._4paradigm.openmldb.java_sdk_test.util;
  
  import com._4paradigm.openmldb.test_common.model.DBType;
  
  import java.sql.Connection;
  
  /**
   * @author zhaowei
   * @date 2021/3/17 11:48 AM
   */
  public class ConnectionFactory {
      private C3p0 sqlite3;
      private C3p0 mysql;
      private ConnectionFactory() {
          sqlite3 = new C3p0("sqlite3.properties");
          mysql = new C3p0("mysql.properties");
          MysqlUtil.createDB();
      }
  
      private static class ClassHolder {
          private static final ConnectionFactory INSTANCE = new ConnectionFactory();
      }
  
      public static ConnectionFactory of() {
          return ClassHolder.INSTANCE;
      }
  
      public Connection getSqlite3Conn(){
          return sqlite3.getConnection();
      }
  
      public Connection getMysqlConn(){
          return mysql.getConnection();
      }
  
      public Connection getConn(DBType dbType){
          switch (dbType){
              case SQLITE3:
                  return getSqlite3Conn();
              case MYSQL:
                  return getMysqlConn();
              default:
                  throw new RuntimeException("unsupport db type");
          }
      }
  
      public static void main(String[] args) {
          Connection conn = ConnectionFactory.of().getConn(DBType.MYSQL);
          System.out.println(conn);
          // MysqlUtil.createDB("test_fesql");
      }
  }
  