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   1 /**
   2  * Copyright (c) 2010-2020 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  * @author Helmut Lehmeyer - Initial contribution
  26  */
  27 public class JdbcMariadbDAO extends JdbcBaseDAO {
  28     private final Logger logger = LoggerFactory.getLogger(JdbcMariadbDAO.class);
  29
  30     /********
  31      * INIT *
  32      ********/
  33     public JdbcMariadbDAO() {
  34         super();
  35         initSqlTypes();
  36         initDbProps();
  37         initSqlQueries();
  38     }
  39
  40     private void initSqlQueries() {
  41         logger.debug("JDBC::initSqlQueries: '{}'", this.getClass().getSimpleName());
  42     }
  43
  44     /**
  45      * INFO: http://www.java2s.com/Code/Java/Database-SQL-JDBC/StandardSQLDataTypeswithTheirJavaEquivalents.htm
  46      */
  47     private void initSqlTypes() {
  48         logger.debug("JDBC::initSqlTypes: Initialize the type array");
  49         sqlTypes.put("IMAGEITEM", "VARCHAR(16255)");
  50         sqlTypes.put("STRINGITEM", "VARCHAR(16255)"); // MariaDB using utf-8 max = 16383, using 16383-128 = 16255
  51     }
  52
  53     /**
  54      * INFO: https://github.com/brettwooldridge/HikariCP
  55      */
  56     private void initDbProps() {
  57         // Performancetuning
  58         databaseProps.setProperty("dataSource.cachePrepStmts", "true");
  59         databaseProps.setProperty("dataSource.prepStmtCacheSize", "250");
  60         databaseProps.setProperty("dataSource.prepStmtCacheSqlLimit", "2048");
  61         databaseProps.setProperty("dataSource.jdbcCompliantTruncation", "false");// jdbc standard max varchar max length
  62         // of 21845
  63
  64         // Properties for HikariCP
  65         // Use driverClassName
  66         databaseProps.setProperty("driverClassName", "org.mariadb.jdbc.Driver");
  67         // driverClassName OR BETTER USE dataSourceClassName
  68         // databaseProps.setProperty("dataSourceClassName", "org.mariadb.jdbc.MySQLDataSource");
  69         databaseProps.setProperty("maximumPoolSize", "3");
  70         databaseProps.setProperty("minimumIdle", "2");
  71     }
  72
  73     @Override
  74     public void initAfterFirstDbConnection() {
  75         logger.debug("JDBC::initAfterFirstDbConnection: Initializing step, after db is connected.");
  76         dbMeta = new DbMetaData();
  77         // Initialize sqlTypes, depending on DB version for example
  78         if (dbMeta.isDbVersionGreater(5, 1)) {
  79             sqlTypes.put("DATETIMEITEM", "TIMESTAMP(3)");
  80             sqlTypes.put("tablePrimaryKey", "TIMESTAMP(3)");
  81             sqlTypes.put("tablePrimaryValue", "NOW(3)");
  82         }
  83     }
  84
  85     /**************
  86      * ITEMS DAOs *
  87      **************/
  88     @Override
  89     public Integer doPingDB() {
  90         return Yank.queryScalar(sqlPingDB, Long.class, null).intValue();
  91     }
  92
  93     /*************
  94      * ITEM DAOs *
  95      *************/
  96
  97     /****************************
  98      * SQL generation Providers *
  99      ****************************/
 100
 101     /*****************
 102      * H E L P E R S *
 103      *****************/
 104
 105     /******************************
 106      * public Getters and Setters *
 107      ******************************/
 108 }