Diseño de la capa de datos para el POS

Transcription

1 escuela técnica superior de ingeniería informática Diseño de la capa de datos para el POS Departamento de Lenguajes y Sistemas Informáticos Ingeniería del Software de Gestión III

2 Índice Introducción Estrategias Identificadores únicos Conexiones Clases persistentes Navegabilidad Solución

3 Capa de negocio pos.domain IPOSProcessor stores Order..* deliverto Address boolean cancelorder(string orderid); List listorders(); boolean placeorder(order o); Order retrieveorder(); - orderid: String - deliverto: Addres - payment: CreditCard - timeplaced: Date - details:list - placedbycustomer: String payment -city: String - String -fax: String - phone: String - name: String - state: String - street: String - zipcode: int POSProcessor..* CreditCard Detail..* Product - holder: String - number: String - month: int -year: int - note: String - quantity: int - product: Product - productid: String - description: String -price:int

4 Modelo de datos CreditCard OID: varchar(50) = <<PK>> holder: varchar(50) number: varchar(50) month: int year: int payment..* Order OID: varchar(50) = <<PK>> orderid: varchar(50) addressoid: varchar(50) = <<FK>> creditcardoid: varchar(50)=<<fk>> timeplaced: bigint placedbycustomer: varchar(50)..* deliverto Address OID: varchar(50) = <<PK>> city: varchar(50) varchar(50) fax: varchar(50) phone: varchar(50) name: varchar(50) street: varchar(50) zipcode: int Detail..* Product OID: varchar(50) = <<PK>> orderoid: varchar(50)=<<fk>> productoid: varchar(50)=<<fk>> note: varchar(250) quantity: int OID: varchar(50) = <<PK>> productid: varchar(50) description: varchar(250) price: int

5 Índice Introducción Estrategias Identificadores únicos Conexiones Clases persistentes Navegabilidad Solución

6 Generador de identificadores únicos pos.utils <<Singleton>> UIDGenerator + String getkey()

7 Generador de identificadores únicos package pos.utils; import java.security.securerandom; public class UIDGenerator { private static UIDGenerator guidgen; private SecureRandom random; private UIDGenerator() { this.random = new SecureRandom(); public static synchronized UIDGenerator getinstance() { if (guidgen == null) { guidgen = new UIDGenerator(); return guidgen; public String getkey() { String key = "" + System.currentTimeMillis() + Long.toHexString(random.nextInt()); return key;

8 Índice Introducción Estrategias Identificadores únicos Conexiones Clases persistentes Navegabilidad Solución

9 ConnectionManager <<Singleton>> ConnectionManager - Driver dbdriver - String dburi - String drivername - String password - String username + Connection checkout() + void checkin(connection conn)

10 ConnectionManager package pos.data; import java.sql.*; public class ConnectionManager { private static ConnectionManager cm; private Driver dbdriver = null; private static final String dburi = "jdbc:mysql:// :3306/pos"; private static final String drivername = "com.mysql.jdbc.driver"; private static final String password = "practica"; private static final String username = "practica";... private ConnectionManager() { try { dbdriver = (Driver) Class.forName(driverName).newInstance(); DriverManager.registerDriver(dBDriver); catch (Exception e) { System.err.println("Unable to register JDBC Driver"); e.printstacktrace(); public static synchronized ConnectionManager getinstance() { if (cm == null) {cm = new ConnectionManager(); return cm;

11 ConnectionManager public Connection checkout() { Connection conn = null; try { conn = DriverManager.getConnection(dBUri, username, password); catch (Exception e) { e.printstacktrace(); return conn; public void checkin(connection conn) { try { conn.close(); catch (SQLException e) { e.printstacktrace(); protected void finalize() { System.out.println("Llamando a finalize de ConnectionManager"); try { DriverManager.deregisterDriver(dBDriver); catch (SQLException e) { e.printstacktrace();

12 Índice Introducción Estrategias Identificadores únicos Conexiones Clases persistentes Navegabilidad Solución

13 Clases persistentes pos.domain IPOSProcessor stores Order..* deliverto Address boolean cancelorder(string orderid); List listorders(); boolean placeorder(order o); Order retrieveorder(); - orderid: String - deliverto: Addres - payment: CreditCard - timeplaced: Date - details:list - placedbycustomer: String payment -city: String - String -fax: String - phone: String - name: String - state: String - street: String - zipcode: int POSProcessor..* CreditCard Detail..* Product - holder: String - number: String - month: int -year: int - note: String - quantity: int - product: Product - productid: String - description: String -price:int

14 DAO Por cada clase persistente, tendremos en la capa de acceso: Una interfaz (IClassnameDAO) Una clase que implementa dicha interfaz (JDBCClassnameDAO)

15 Capa de datos pos.data IProductDAO <<Singleton>> ConnectionManager - Driver dbdriver - String dburi - String drivername - String password - String username + Connection checkout() + void checkin(connection conn) ICreditCardDAO JDBCCreditCardDAO IOrderDAO JDBCProductDAO IDetailDAO IAddressDAO JDBCOrderDAO JDBCDetailDAO JDBCAddressDAO

16 Definición de las interfaces DAO IDetailDAO void delete(...) void insert(...) List select(...) IProductDAO List selectallproducts(...) Product select(...) IOrderDAO Void delete(...) List selectallorders(...) void insertorder(...) Order selectoldorder(...) IAddressDAO void delete(...) void insert(...) Address select(...) ICreditCardDAO void delete(...) void insert(...) CreditCard select(...)

17 Índice Introducción Estrategias Identificadores únicos Conexiones Clases persistentes Navegabilidad Solución

18 Navegabilidad Nos permite: Refinar las definiciones de los IClassnameDAO Establecer relaciones entre los distintos IClassnameDAO Establecer una política para la gestión de conexiones

19 Navegabilidad pos.domain IPOSProcessor stores Order..* deliverto Address boolean cancelorder(string orderid); List listorders(); boolean placeorder(order o); Order retrieveorder(); - orderid: String - deliverto: Addres - payment: CreditCard - timeplaced: Date - details:list - placedbycustomer: String payment -city: String - String -fax: String - phone: String - name: String - state: String - street: String - zipcode: int POSProcessor..* CreditCard - holder: String - number: String - month: int -year: int Detail - note: String - quantity: int - product: Product..* Product - productid: String - description: String -price:int

20 Navegabilidad pos.data <<Singleton>> ConnectionManager ICreditCardDAO IProductDAO uses List selectallproducts() Product select(connection conn, String productoid) String selectproductoid(connection conn, String productid) - Driver dbdriver - String dburi - String drivername - String password - String username + Connection checkout() + void checkin(connection conn) uses void delete(connection conn, String creditcardoid) void insert(connection conn, String creditcardoid, CreditCard c) CreditCard select(connection conn, String creditcardoid) JDBCCreditCardDAO IOrderDAO JDBCProductDAO IDetailDAO void delete(connection conn, String orderoid) void insert(connection conn, List details, String orderoid) List select(connection conn, String orderoid) void delete(string OrderID) List selectallorders() void insertorder(order o) Order selectoldorder() JDBCOrderDAO IAddressDAO void delete(connection conn, String addressoid) void insert(connection conn, String addressoid, Address a) Address select(connection conn, String addressoid) JDBCDetailDAO JDBCAddressDAO

21 Índice Introducción Estrategias Identificadores únicos Conexiones Clases persistentes Navegabilidad Solución

22 Solución pos.domain IPOSProcessor stores Order..* deliverto Address boolean cancelorder(string orderid); List listorders(); boolean placeorder(order o); Order retrieveorder(); - orderid: String - deliverto: Addres - payment: CreditCard - timeplaced: Date - details:list - placedbycustomer: String payment -city: String - String -fax: String - phone: String - name: String - state: String - street: String - zipcode: int pos.utils <<Singleton>> UIDGenerator POSProcessor..* + String getkey() - odao: IOrderDAO CreditCard Detail..* Product - holder: String - number: String -month: int - year: int - note: String - quantity: int - product: Product - productid: String - description: String -price:int uses pos.data uses <<Singleton>> ConnectionManager ICreditCardDAO IProductDAO List selectallproducts() Product select(connection conn, String productoid) String selectproductoid(connection conn, String productid) JDBCProductDAO uses IDetailDAO - Driver dbdriver - String dburi - String drivername - String password - String username + Connection checkout() + void checkin(connection conn) void delete(connection conn, String orderoid) void insert(connection conn, List details, String orderoid) List select(connection conn, String orderoid) uses IOrderDAO void delete(string OrderID) List selectallorders() void insertorder(order o) Order selectoldorder() void delete(connection conn, String creditcardoid) void insert(connection conn, String creditcardoid, CreditCard c) CreditCard select(connection conn, String creditcardoid) JDBCCreditCardDAO IAddressDAO void delete(connection conn, String addressoid) void insert(connection conn, String addressoid, Address a) Address select(connection conn, String addressoid) JDBCDetailDAO JDBCOrderDAO JDBCAddressDAO

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