Java tutorial
/******************************************************************************* * Copyright (c) 2015-2016, WSO2.Telco Inc. (http://www.wso2telco.com) All Rights Reserved. * <p> * WSO2.Telco Inc. licences this file to you 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 * <p> * http://www.apache.org/licenses/LICENSE-2.0 * <p> * 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.wso2telco.dep.ratecardservice.dao; import java.sql.Connection; import java.sql.PreparedStatement; import java.sql.ResultSet; import java.sql.SQLException; import java.sql.Statement; import java.sql.Types; import java.util.ArrayList; import java.util.List; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; import com.wso2telco.core.dbutils.DbUtils; import com.wso2telco.core.dbutils.exception.BusinessException; import com.wso2telco.core.dbutils.exception.ServiceError; import com.wso2telco.core.dbutils.util.DataSourceNames; import com.wso2telco.dep.ratecardservice.dao.model.CategoryDTO; import com.wso2telco.dep.ratecardservice.dao.model.RateCategoryDTO; import com.wso2telco.dep.ratecardservice.dao.model.RateDefinitionDTO; import com.wso2telco.dep.ratecardservice.dao.model.TariffDTO; import com.wso2telco.dep.ratecardservice.util.DatabaseTables; public class RateCategoryDAO { private final Log log = LogFactory.getLog(RateCategoryDAO.class); public RateCategoryDTO addRateCategory(RateCategoryDTO rateCategory) throws BusinessException { Connection con = null; PreparedStatement ps = null; ResultSet rs = null; Integer rateCategoryId = 0; try { con = DbUtils.getDbConnection(DataSourceNames.WSO2TELCO_RATE_DB); if (con == null) { log.error("unable to open " + DataSourceNames.WSO2TELCO_RATE_DB + " database connection"); throw new BusinessException(ServiceError.SERVICE_ERROR_OCCURED); } StringBuilder query = new StringBuilder("insert into "); query.append(DatabaseTables.RATE_CATEGORY.getTObject()); query.append(" (rate_defid, parentcategoryid, childcategoryid, tariffid, createdby)"); query.append(" values"); query.append(" (?, ?, ?, ?, ?)"); ps = con.prepareStatement(query.toString(), Statement.RETURN_GENERATED_KEYS); log.debug("sql query in addRateCategory : " + ps); ps.setInt(1, rateCategory.getRateDefinition().getRateDefId()); ps.setInt(2, rateCategory.getCategory().getCategoryId()); Integer subCategoryId = rateCategory.getSubCategory().getCategoryId(); if (subCategoryId != null) { ps.setInt(3, subCategoryId); } else { ps.setNull(3, Types.INTEGER); } ps.setInt(4, rateCategory.getTariff().getTariffId()); ps.setString(5, rateCategory.getCreatedBy()); ps.executeUpdate(); rs = ps.getGeneratedKeys(); while (rs.next()) { rateCategoryId = rs.getInt(1); } rateCategory.setRateCategoryId(rateCategoryId); } catch (SQLException e) { log.error("database operation error in addRateCategory : ", e); throw new BusinessException(ServiceError.SERVICE_ERROR_OCCURED); } catch (Exception e) { log.error("error in addRateCategory : ", e); throw new BusinessException(ServiceError.SERVICE_ERROR_OCCURED); } finally { DbUtils.closeAllConnections(ps, con, rs); } return rateCategory; } public List<RateCategoryDTO> getRateCategories(int rateDefId) throws BusinessException { List<RateCategoryDTO> rateCategories = new ArrayList<RateCategoryDTO>(); Connection con = null; ResultSet rs = null; PreparedStatement ps = null; try { con = DbUtils.getDbConnection(DataSourceNames.WSO2TELCO_RATE_DB); if (con == null) { log.error("unable to open " + DataSourceNames.WSO2TELCO_RATE_DB + " database connection"); throw new BusinessException(ServiceError.SERVICE_ERROR_OCCURED); } StringBuilder query = new StringBuilder( "select rate_category_id, rate_defid, parentcategoryid, childcategoryid, tariffid, createdby from "); query.append(DatabaseTables.RATE_CATEGORY.getTObject()); query.append(" where rate_defid = ?"); ps = con.prepareStatement(query.toString()); log.debug("sql query in getRateCategories : " + ps); ps.setInt(1, rateDefId); rs = ps.executeQuery(); while (rs.next()) { RateCategoryDTO rateCategory = new RateCategoryDTO(); rateCategory.setRateCategoryId(rs.getInt("rate_category_id")); RateDefinitionDTO rateDefinition = new RateDefinitionDTO(); rateDefinition.setRateDefId(rs.getInt("rate_defid")); rateCategory.setRateDefinition(rateDefinition); CategoryDTO category = new CategoryDTO(); category.setCategoryId(rs.getInt("parentcategoryid")); rateCategory.setCategory(category); CategoryDTO subCategory = new CategoryDTO(); subCategory.setCategoryId(rs.getInt("childcategoryid")); rateCategory.setSubCategory(subCategory); TariffDTO tariff = new TariffDTO(); tariff.setTariffId(rs.getInt("tariffid")); rateCategory.setTariff(tariff); rateCategory.setCreatedBy(rs.getString("createdby")); rateCategories.add(rateCategory); } } catch (SQLException e) { log.error("database operation error in getRateCategories : ", e); throw new BusinessException(ServiceError.SERVICE_ERROR_OCCURED); } catch (Exception e) { log.error("error in getRateCategories : ", e); throw new BusinessException(ServiceError.SERVICE_ERROR_OCCURED); } finally { DbUtils.closeAllConnections(ps, con, rs); } return rateCategories; } public RateCategoryDTO getRateCategory(int rateCategoryId) throws BusinessException { RateCategoryDTO rateCategory = null; Connection con = null; ResultSet rs = null; PreparedStatement ps = null; try { con = DbUtils.getDbConnection(DataSourceNames.WSO2TELCO_RATE_DB); if (con == null) { log.error("unable to open " + DataSourceNames.WSO2TELCO_RATE_DB + " database connection"); throw new BusinessException(ServiceError.SERVICE_ERROR_OCCURED); } StringBuilder query = new StringBuilder( "select rate_category_id, rate_defid, parentcategoryid, childcategoryid, tariffid, createdby from "); query.append(DatabaseTables.RATE_CATEGORY.getTObject()); query.append(" where rate_category_id = ?"); ps = con.prepareStatement(query.toString()); log.debug("sql query in getRateCategory : " + ps); ps.setInt(1, rateCategoryId); rs = ps.executeQuery(); while (rs.next()) { rateCategory = new RateCategoryDTO(); rateCategory.setRateCategoryId(rs.getInt("rate_category_id")); RateDefinitionDTO rateDefinition = new RateDefinitionDTO(); rateDefinition.setRateDefId(rs.getInt("rate_defid")); rateCategory.setRateDefinition(rateDefinition); CategoryDTO category = new CategoryDTO(); category.setCategoryId(rs.getInt("parentcategoryid")); rateCategory.setCategory(category); CategoryDTO subCategory = new CategoryDTO(); subCategory.setCategoryId(rs.getInt("childcategoryid")); rateCategory.setSubCategory(subCategory); TariffDTO tariff = new TariffDTO(); tariff.setTariffId(rs.getInt("tariffid")); rateCategory.setTariff(tariff); rateCategory.setCreatedBy(rs.getString("createdby")); } } catch (SQLException e) { log.error("database operation error in getRateCategory : ", e); throw new BusinessException(ServiceError.SERVICE_ERROR_OCCURED); } catch (Exception e) { log.error("error in getRateCategory : ", e); throw new BusinessException(ServiceError.SERVICE_ERROR_OCCURED); } finally { DbUtils.closeAllConnections(ps, con, rs); } return rateCategory; } }