package com.ashishtrivedi16.transactionscript; import com.ashishtrivedi16.transactionscript.db.CustomException; import com.ashishtrivedi16.transactionscript.db.HotelDAOImpl; import com.ashishtrivedi16.transactionscript.db.RoomSchemaSql; import java.sql.SQLException; import java.util.List; import javax.sql.DataSource; import org.h2.jdbc.JdbcSQLException; import org.h2.jdbcx.JdbcDataSource; import org.slf4j.Logger; import org.slf4j.LoggerFactory; public class TransactionScriptApp { private static final String H2_DB_URL = "jdbc:h2:~/test"; private static final Logger LOGGER = LoggerFactory.getLogger(TransactionScriptApp.class); private static final String ALL_ROOMS = "customerDao.getAllRooms(): "; public static void main(String[] args) throws Exception { /* TODO -> Create in memory database and some sample tables for demo */ final var dataSource = createDataSource(); createSchema(dataSource); final var DAO = new HotelDAOImpl(dataSource); addRooms(DAO); try (var customerStream = DAO.getAll()) { customerStream.forEach((customer) -> LOGGER.info(customer.toString())); } Hotel hotel = new Hotel(DAO); hotel.bookRoom(1); hotel.bookRoom(2); hotel.bookRoom(3); hotel.bookRoom(4); hotel.bookRoom(5); hotel.bookRoom(6); hotel.cancelRoomBooking(3); hotel.cancelRoomBooking(4); deleteSchema(dataSource); } private static void deleteSchema(DataSource dataSource) throws SQLException { try (var connection = dataSource.getConnection(); var statement = connection.createStatement()) { statement.execute(RoomSchemaSql.DELETE_SCHEMA_SQL); } } private static void createSchema(DataSource dataSource) throws Exception { try (var connection = dataSource.getConnection(); var statement = connection.createStatement()) { statement.execute(RoomSchemaSql.CREATE_SCHEMA_SQL); } catch (JdbcSQLException e) { throw new CustomException(e.getMessage(), e); } } public static DataSource createDataSource() { JdbcDataSource dataSource = new JdbcDataSource(); dataSource.setUrl(H2_DB_URL); return dataSource; } private static void addRooms(HotelDAOImpl hotelDAO) throws Exception { for (var room : generateSampleRooms()) { hotelDAO.add(room); } } public static List generateSampleRooms() { final var room1 = new Room(1, "Single", 50, false); final var room2 = new Room(2, "Double", 80, false); final var room3 = new Room(3, "Queen", 120, false); final var room4 = new Room(4, "King", 150, false); final var room5 = new Room(5, "Single", 50, false); final var room6 = new Room(6, "Double", 80, false); return List.of(room1, room2, room3, room4, room5, room6); } }