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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.eclipse.jdt.annotation.NonNullByDefault;
  16 import org.knowm.yank.Yank;
  17 import org.openhab.persistence.jdbc.utils.DbMetaData;
  18 import org.slf4j.Logger;
  19 import org.slf4j.LoggerFactory;
  20
  21 /**
  22  * Extended Database Configuration class. Class represents
  23  * the extended database-specific configuration. Overrides and supplements the
  24  * default settings from JdbcBaseDAO. Enter only the differences to JdbcBaseDAO here.
  25  *
  26  * since driver version >= 6.0 sometimes timezone conversation is needed: ?serverTimezone=UTC
  27  * example: dbProps.setProperty("jdbcUrl", "jdbc:mysql://192.168.0.181:3306/ItemTypeTest3?serverTimezone=UTC");//mysql
  28  * 5.7
  29  *
  30  * @author Helmut Lehmeyer - Initial contribution
  31  */
  32 @NonNullByDefault
  33 public class JdbcMysqlDAO extends JdbcBaseDAO {
  34     private final Logger logger = LoggerFactory.getLogger(JdbcMysqlDAO.class);
  35
  36     /********
  37      * INIT *
  38      ********/
  39     public JdbcMysqlDAO() {
  40         super();
  41         initSqlTypes();
  42         initDbProps();
  43         initSqlQueries();
  44     }
  45
  46     private void initSqlQueries() {
  47         logger.debug("JDBC::initSqlQueries: '{}'", this.getClass().getSimpleName());
  48     }
  49
  50     /**
  51      * INFO: http://www.java2s.com/Code/Java/Database-SQL-JDBC/StandardSQLDataTypeswithTheirJavaEquivalents.htm
  52      */
  53     private void initSqlTypes() {
  54         logger.debug("JDBC::initSqlTypes: Initialize the type array");
  55         sqlTypes.put("STRINGITEM", "VARCHAR(21717)");// mysql using utf-8 max 65535/3 = 21845, using 21845-128 = 21717
  56     }
  57
  58     /**
  59      * INFO: https://github.com/brettwooldridge/HikariCP
  60      */
  61     private void initDbProps() {
  62         // Performancetuning
  63         databaseProps.setProperty("dataSource.cachePrepStmts", "true");
  64         databaseProps.setProperty("dataSource.prepStmtCacheSize", "250");
  65         databaseProps.setProperty("dataSource.prepStmtCacheSqlLimit", "2048");
  66         databaseProps.setProperty("dataSource.jdbcCompliantTruncation", "false");// jdbc standard max varchar max length
  67                                                                                  // of 21845
  68
  69         // Properties for HikariCP
  70         // Use driverClassName
  71         databaseProps.setProperty("driverClassName", "com.mysql.jdbc.Driver");
  72         // OR dataSourceClassName
  73         // databaseProps.setProperty("dataSourceClassName", "com.mysql.jdbc.jdbc2.optional.MysqlDataSource");
  74         databaseProps.setProperty("maximumPoolSize", "3");
  75         databaseProps.setProperty("minimumIdle", "2");
  76     }
  77
  78     @Override
  79     public void initAfterFirstDbConnection() {
  80         logger.debug("JDBC::initAfterFirstDbConnection: Initializing step, after db is connected.");
  81         dbMeta = new DbMetaData();
  82         // Initialize sqlTypes, depending on DB version for example
  83         if (dbMeta.isDbVersionGreater(5, 5)) {
  84             sqlTypes.put("DATETIMEITEM", "TIMESTAMP(3)");
  85             sqlTypes.put("tablePrimaryKey", "TIMESTAMP(3)");
  86             sqlTypes.put("tablePrimaryValue", "NOW(3)");
  87         }
  88     }
  89
  90     /**************
  91      * ITEMS DAOs *
  92      **************/
  93     @Override
  94     public Integer doPingDB() {
  95         return Yank.queryScalar(sqlPingDB, Long.class, null).intValue();
  96     }
  97
  98     /*************
  99      * ITEM DAOs *
 100      *************/
 101
 102     /****************************
 103      * SQL generation Providers *
 104      ****************************/
 105
 106     /*****************
 107      * H E L P E R S *
 108      *****************/
 109
 110     /******************************
 111      * public Getters and Setters *
 112      ******************************/
 113 }