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   1 /**
   2  * Copyright (c) 2010-2021 Contributors to the openHAB project
   3  *
   4  * See the NOTICE file(s) distributed with this work for additional
   5  * information.
   6  *
   7  * This program and the accompanying materials are made available under the
   8  * terms of the Eclipse Public License 2.0 which is available at
   9  * http://www.eclipse.org/legal/epl-2.0
  10  *
  11  * SPDX-License-Identifier: EPL-2.0
  12  */
  13 package org.openhab.persistence.jdbc.db;
  14
  15 import org.knowm.yank.Yank;
  16 import org.openhab.persistence.jdbc.utils.DbMetaData;
  17 import org.slf4j.Logger;
  18 import org.slf4j.LoggerFactory;
  19
  20 /**
  21  * Extended Database Configuration class. Class represents
  22  * the extended database-specific configuration. Overrides and supplements the
  23  * default settings from JdbcBaseDAO. Enter only the differences to JdbcBaseDAO here.
  24  *
  25  * since driver version >= 6.0 sometimes timezone conversation is needed: ?serverTimezone=UTC
  26  * example: dbProps.setProperty("jdbcUrl", "jdbc:mysql://192.168.0.181:3306/ItemTypeTest3?serverTimezone=UTC");//mysql
  27  * 5.7
  28  *
  29  * @author Helmut Lehmeyer - Initial contribution
  30  */
  31 public class JdbcMysqlDAO extends JdbcBaseDAO {
  32     private final Logger logger = LoggerFactory.getLogger(JdbcMysqlDAO.class);
  33
  34     /********
  35      * INIT *
  36      ********/
  37     public JdbcMysqlDAO() {
  38         super();
  39         initSqlTypes();
  40         initDbProps();
  41         initSqlQueries();
  42     }
  43
  44     private void initSqlQueries() {
  45         logger.debug("JDBC::initSqlQueries: '{}'", this.getClass().getSimpleName());
  46     }
  47
  48     /**
  49      * INFO: http://www.java2s.com/Code/Java/Database-SQL-JDBC/StandardSQLDataTypeswithTheirJavaEquivalents.htm
  50      */
  51     private void initSqlTypes() {
  52         logger.debug("JDBC::initSqlTypes: Initialize the type array");
  53         sqlTypes.put("STRINGITEM", "VARCHAR(21717)");// mysql using utf-8 max 65535/3 = 21845, using 21845-128 = 21717
  54     }
  55
  56     /**
  57      * INFO: https://github.com/brettwooldridge/HikariCP
  58      */
  59     private void initDbProps() {
  60         // Performancetuning
  61         databaseProps.setProperty("dataSource.cachePrepStmts", "true");
  62         databaseProps.setProperty("dataSource.prepStmtCacheSize", "250");
  63         databaseProps.setProperty("dataSource.prepStmtCacheSqlLimit", "2048");
  64         databaseProps.setProperty("dataSource.jdbcCompliantTruncation", "false");// jdbc standard max varchar max length
  65                                                                                  // of 21845
  66
  67         // Properties for HikariCP
  68         // Use driverClassName
  69         databaseProps.setProperty("driverClassName", "com.mysql.jdbc.Driver");
  70         // OR dataSourceClassName
  71         // databaseProps.setProperty("dataSourceClassName", "com.mysql.jdbc.jdbc2.optional.MysqlDataSource");
  72         databaseProps.setProperty("maximumPoolSize", "3");
  73         databaseProps.setProperty("minimumIdle", "2");
  74     }
  75
  76     @Override
  77     public void initAfterFirstDbConnection() {
  78         logger.debug("JDBC::initAfterFirstDbConnection: Initializing step, after db is connected.");
  79         dbMeta = new DbMetaData();
  80         // Initialize sqlTypes, depending on DB version for example
  81         if (dbMeta.isDbVersionGreater(5, 5)) {
  82             sqlTypes.put("DATETIMEITEM", "TIMESTAMP(3)");
  83             sqlTypes.put("tablePrimaryKey", "TIMESTAMP(3)");
  84             sqlTypes.put("tablePrimaryValue", "NOW(3)");
  85         }
  86     }
  87
  88     /**************
  89      * ITEMS DAOs *
  90      **************/
  91     @Override
  92     public Integer doPingDB() {
  93         return Yank.queryScalar(sqlPingDB, Long.class, null).intValue();
  94     }
  95
  96     /*************
  97      * ITEM DAOs *
  98      *************/
  99
 100     /****************************
 101      * SQL generation Providers *
 102      ****************************/
 103
 104     /*****************
 105      * H E L P E R S *
 106      *****************/
 107
 108     /******************************
 109      * public Getters and Setters *
 110      ******************************/
 111 }