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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 java.time.ZoneId;
  16 import java.time.format.DateTimeFormatter;
  17 import java.util.ArrayList;
  18 import java.util.List;
  19
  20 import org.knowm.yank.Yank;
  21 import org.openhab.core.items.Item;
  22 import org.openhab.core.persistence.FilterCriteria;
  23 import org.openhab.core.persistence.FilterCriteria.Ordering;
  24 import org.openhab.core.persistence.HistoricItem;
  25 import org.openhab.persistence.jdbc.model.ItemVO;
  26 import org.openhab.persistence.jdbc.model.ItemsVO;
  27 import org.openhab.persistence.jdbc.model.JdbcHistoricItem;
  28 import org.openhab.persistence.jdbc.utils.StringUtilsExt;
  29 import org.slf4j.Logger;
  30 import org.slf4j.LoggerFactory;
  31
  32 /**
  33  * Extended Database Configuration class. Class represents
  34  * the extended database-specific configuration. Overrides and supplements the
  35  * default settings from JdbcBaseDAO. Enter only the differences to JdbcBaseDAO here.
  36  *
  37  * @author Helmut Lehmeyer - Initial contribution
  38  */
  39 public class JdbcPostgresqlDAO extends JdbcBaseDAO {
  40     private final Logger logger = LoggerFactory.getLogger(JdbcPostgresqlDAO.class);
  41
  42     /********
  43      * INIT *
  44      ********/
  45     public JdbcPostgresqlDAO() {
  46         super();
  47         initSqlQueries();
  48         initSqlTypes();
  49         initDbProps();
  50     }
  51
  52     private void initSqlQueries() {
  53         logger.debug("JDBC::initSqlQueries: '{}'", this.getClass().getSimpleName());
  54         // System Information Functions: https://www.postgresql.org/docs/9.2/static/functions-info.html
  55         sqlGetDB = "SELECT CURRENT_DATABASE()";
  56         sqlIfTableExists = "SELECT * FROM PG_TABLES WHERE TABLENAME='#searchTable#'";
  57         sqlCreateItemsTableIfNot = "CREATE TABLE IF NOT EXISTS #itemsManageTable# (itemid SERIAL NOT NULL, #colname# #coltype# NOT NULL, CONSTRAINT #itemsManageTable#_pkey PRIMARY KEY (itemid))";
  58         sqlCreateNewEntryInItemsTable = "INSERT INTO items (itemname) SELECT itemname FROM #itemsManageTable# UNION VALUES ('#itemname#') EXCEPT SELECT itemname FROM items";
  59         sqlGetItemTables = "SELECT table_name FROM information_schema.tables WHERE table_type='BASE TABLE' AND table_schema='public' AND NOT table_name='#itemsManageTable#'";
  60         // http://stackoverflow.com/questions/17267417/how-do-i-do-an-upsert-merge-insert-on-duplicate-update-in-postgresql
  61         // for later use, PostgreSql > 9.5 to prevent PRIMARY key violation use:
  62         // SQL_INSERT_ITEM_VALUE = "INSERT INTO #tableName# (TIME, VALUE) VALUES( NOW(), CAST( ? as #dbType#) ) ON
  63         // CONFLICT DO NOTHING";
  64         sqlInsertItemValue = "INSERT INTO #tableName# (TIME, VALUE) VALUES( #tablePrimaryValue#, CAST( ? as #dbType#) )";
  65     }
  66
  67     /**
  68      * INFO: http://www.java2s.com/Code/Java/Database-SQL-JDBC/StandardSQLDataTypeswithTheirJavaEquivalents.htm
  69      */
  70     private void initSqlTypes() {
  71         // Initialize the type array
  72         sqlTypes.put("CALLITEM", "VARCHAR");
  73         sqlTypes.put("COLORITEM", "VARCHAR");
  74         sqlTypes.put("CONTACTITEM", "VARCHAR");
  75         sqlTypes.put("DATETIMEITEM", "TIMESTAMP");
  76         sqlTypes.put("DIMMERITEM", "SMALLINT");
  77         sqlTypes.put("IMAGEITEM", "VARCHAR");
  78         sqlTypes.put("LOCATIONITEM", "VARCHAR");
  79         sqlTypes.put("NUMBERITEM", "DOUBLE PRECISION");
  80         sqlTypes.put("PLAYERITEM", "VARCHAR");
  81         sqlTypes.put("ROLLERSHUTTERITEM", "SMALLINT");
  82         sqlTypes.put("STRINGITEM", "VARCHAR");
  83         sqlTypes.put("SWITCHITEM", "VARCHAR");
  84         logger.debug("JDBC::initSqlTypes: Initialized the type array sqlTypes={}", sqlTypes.values());
  85     }
  86
  87     /**
  88      * INFO: https://github.com/brettwooldridge/HikariCP
  89      */
  90     private void initDbProps() {
  91         // Performance:
  92         // databaseProps.setProperty("dataSource.cachePrepStmts", "true");
  93         // databaseProps.setProperty("dataSource.prepStmtCacheSize", "250");
  94         // databaseProps.setProperty("dataSource.prepStmtCacheSqlLimit", "2048");
  95
  96         // Properties for HikariCP
  97         databaseProps.setProperty("driverClassName", "org.postgresql.Driver");
  98         // driverClassName OR BETTER USE dataSourceClassName
  99         // databaseProps.setProperty("dataSourceClassName", "org.postgresql.ds.PGSimpleDataSource");
 100         // databaseProps.setProperty("maximumPoolSize", "3");
 101         // databaseProps.setProperty("minimumIdle", "2");
 102     }
 103
 104     /**************
 105      * ITEMS DAOs *
 106      **************/
 107     @Override
 108     public ItemsVO doCreateItemsTableIfNot(ItemsVO vo) {
 109         String sql = StringUtilsExt.replaceArrayMerge(sqlCreateItemsTableIfNot,
 110                 new String[] { "#itemsManageTable#", "#colname#", "#coltype#", "#itemsManageTable#" },
 111                 new String[] { vo.getItemsManageTable(), vo.getColname(), vo.getColtype(), vo.getItemsManageTable() });
 112         logger.debug("JDBC::doCreateItemsTableIfNot sql={}", sql);
 113         Yank.execute(sql, null);
 114         return vo;
 115     }
 116
 117     @Override
 118     public Long doCreateNewEntryInItemsTable(ItemsVO vo) {
 119         String sql = StringUtilsExt.replaceArrayMerge(sqlCreateNewEntryInItemsTable,
 120                 new String[] { "#itemsManageTable#", "#itemname#" },
 121                 new String[] { vo.getItemsManageTable(), vo.getItemname() });
 122         logger.debug("JDBC::doCreateNewEntryInItemsTable sql={}", sql);
 123         return Yank.insert(sql, null);
 124     }
 125
 126     @Override
 127     public List<ItemsVO> doGetItemTables(ItemsVO vo) {
 128         String sql = StringUtilsExt.replaceArrayMerge(sqlGetItemTables, new String[] { "#itemsManageTable#" },
 129                 new String[] { vo.getItemsManageTable() });
 130         logger.debug("JDBC::doGetItemTables sql={}", sql);
 131         return Yank.queryBeanList(sql, ItemsVO.class, null);
 132     }
 133
 134     /*************
 135      * ITEM DAOs *
 136      *************/
 137     @Override
 138     public void doStoreItemValue(Item item, ItemVO vo) {
 139         vo = storeItemValueProvider(item, vo);
 140         String sql = StringUtilsExt.replaceArrayMerge(sqlInsertItemValue,
 141                 new String[] { "#tableName#", "#dbType#", "#tablePrimaryValue#" },
 142                 new String[] { vo.getTableName(), vo.getDbType(), sqlTypes.get("tablePrimaryValue") });
 143         Object[] params = new Object[] { vo.getValue() };
 144         logger.debug("JDBC::doStoreItemValue sql={} value='{}'", sql, vo.getValue());
 145         Yank.execute(sql, params);
 146     }
 147
 148     @Override
 149     public List<HistoricItem> doGetHistItemFilterQuery(Item item, FilterCriteria filter, int numberDecimalcount,
 150             String table, String name, ZoneId timeZone) {
 151         String sql = histItemFilterQueryProvider(filter, numberDecimalcount, table, name, timeZone);
 152         logger.debug("JDBC::doGetHistItemFilterQuery sql={}", sql);
 153         List<Object[]> m = Yank.queryObjectArrays(sql, null);
 154
 155         List<HistoricItem> items = new ArrayList<>();
 156         for (int i = 0; i < m.size(); i++) {
 157             items.add(new JdbcHistoricItem(item.getName(), getState(item, m.get(i)[1]), objectAsDate(m.get(i)[0])));
 158         }
 159         return items;
 160     }
 161
 162     /****************************
 163      * SQL generation Providers *
 164      ****************************/
 165     static final DateTimeFormatter JDBC_DATE_FORMAT = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss");
 166
 167     private String histItemFilterQueryProvider(FilterCriteria filter, int numberDecimalcount, String table,
 168             String simpleName, ZoneId timeZone) {
 169         logger.debug(
 170                 "JDBC::getHistItemFilterQueryProvider filter = {}, numberDecimalcount = {}, table = {}, simpleName = {}",
 171                 filter.toString(), numberDecimalcount, table, simpleName);
 172
 173         String filterString = "";
 174         if (filter.getBeginDate() != null) {
 175             filterString += filterString.isEmpty() ? " WHERE" : " AND";
 176             filterString += " TIME>'" + JDBC_DATE_FORMAT.format(filter.getBeginDate().withZoneSameInstant(timeZone))
 177                     + "'";
 178         }
 179         if (filter.getEndDate() != null) {
 180             filterString += filterString.isEmpty() ? " WHERE" : " AND";
 181             filterString += " TIME<'" + JDBC_DATE_FORMAT.format(filter.getEndDate().withZoneSameInstant(timeZone))
 182                     + "'";
 183         }
 184         filterString += (filter.getOrdering() == Ordering.ASCENDING) ? " ORDER BY time ASC" : " ORDER BY time DESC";
 185         if (filter.getPageSize() != 0x7fffffff) {
 186             // see:
 187             // http://www.jooq.org/doc/3.5/manual/sql-building/sql-statements/select-statement/limit-clause/
 188             filterString += " OFFSET " + filter.getPageNumber() * filter.getPageSize() + " LIMIT "
 189                     + filter.getPageSize();
 190         }
 191         String queryString = "NUMBERITEM".equalsIgnoreCase(simpleName) && numberDecimalcount > -1
 192                 ? "SELECT time, ROUND(CAST (value AS numeric)," + numberDecimalcount + ") FROM " + table
 193                 : "SELECT time, value FROM " + table;
 194         if (!filterString.isEmpty()) {
 195             queryString += filterString;
 196         }
 197         logger.debug("JDBC::query queryString = {}", queryString);
 198         return queryString;
 199     }
 200
 201     /*****************
 202      * H E L P E R S *
 203      *****************/
 204
 205     /******************************
 206      * public Getters and Setters *
 207      ******************************/
 208 }