c 30 design patterns

... classes. Thus, the second major precept suggested by Design Patterns is Favor object composition over inheritance. C# Design Patterns Each of the 23 patterns in Design Patterns is discussed, at least ... inheritance, this is obviously very good advice in the C# context. The other major concept you should recognize is that of object composition. This is simply the construction of objects that contain ... Command Objects 294 Consequences of the Command Pattern 297 The CommandHolder Interface 297 Providing Undo 301 Copyright © , 2002 by James W Cooper 27 class. It also has access to all...

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... quyết c c vấn đề trong một lĩnh v c nào đó .C c mẫu đư c lập sưu liệu bằng c ch dùng c c template, c c template cung c p c c heading bên dưới c chứa chi tiết c a mẫu và c ch th c nó làm vi c cho ... c c ch c năng bổ sung cho c c đối tượng riêng biệt một c ch động và trong suốt, nghĩa là không chịu ảnh hưởng (t c động ) c a c c đối tượng kh c. - Cho c c ch c năng mà c c ch c n ăng này c ... giản, c ch th c biểu diễn c u trong ngôn ngữ và c ch th c phiên dịch c c câu đó. Trong ví dụ c thể này, nó miêu tả c ch th c xây dựng c u tr c ngữ pháp cho c c biểu diễn thông thường, c ch thức...

Ngày tải lên: 24/08/2012, 13:53

... bạn c n cung c p c c hành vi cho tất c c c kiểu con. Bình thường, c c Component không c c c thể hiện, c c lớp con ho c c c lớp th c thi c a nó, gọi là c c nốt, c thể c thể hiện và đư c sử ... bằng c c phương th c của mình sẽ th c hiện c c ch c năng abstractionOp() c a lớp Abstraction o Implementation: là giao tiếp th c thi c a lớp c c ch c năng nào đó c a Abstraction o RefineAbstraction: ... định nghĩa ch c năng, yêu c u mà Client c n sử dụng o Adaptee là lớp ch c c c ch c năng mà Target c n sử dụng để tạo ra đư c ch c năng mà Target c n cung c p cho Client o Adapter th c thi từ Target...

Ngày tải lên: 06/09/2012, 14:31

... AbstractFactory (ContinentFactory) o declares an interface for operations that create abstract products • ConcreteFactory (AfricaFactory, AmericaFactory) o implements the operations to create concrete ... Public Function CreateDocument(ByVal docType As DocumentType) _ As IDocument Dim document As IDocument = Nothing Select Case docType Case DocumentType.Word document = New WordDocument() ... to be created by the corresponding concrete factory implements the AbstractProduct interface • Client (AnimalWorld) o uses interfaces declared by AbstractFactory and AbstractProduct classes...

Ngày tải lên: 12/09/2012, 14:38

... singleton/classic Implemented as DoFactory.HeadFirst.Singleton.Classic Page 175: The Chocolate Factory Java program name: singleton/chocolate Implemented as DoFactory.HeadFirst.Singleton.Chocolate ... second command box, change to c: \test\ and launch the Client by typing DoFactory.HeadFirst.Proxy.GumballState.Client.exe. The client GumballMonitor object Copyright © 2006, Data & Object ... name: combining/decorator Implemented as DoFactory.HeadFirst.Combining.Decorator Page 508: We need a factory to produce ducks! Java program name: combining/factory Implemented as DoFactory.HeadFirst.Combining.Factory...

Ngày tải lên: 12/09/2012, 14:40

Ngày tải lên: 06/08/2013, 17:28

... e-commerce scenario. The design patterns and associated best practices in this application can be categorized according to their origin and their purpose. This section describes the three categories ... these service contracts and related topics. SOA best practice design principles Web Services provide a contract that defines its public interface. WSDL is used to inform the service consumer ... of luck because the additional argument will violate the contract that you have with your service clients. Document-centric contracts are easier to evolve since all information exchange occurs...

Ngày tải lên: 29/09/2013, 17:20

... of design patterns because they factor in industry-accepted practices for approaching recurring design problems. CHAPTER 3 ■ DESIGN PATTERNS FOR BUILDING MESSAGE-ORIENTED WEB SERVICES 33 701xCH03.qxd ... and implement each of the abstract class methods [WebService(Namespace = "http://www.bluestonepartners.com/schemas/StockTrader")] public class StockTraderService : StockTraderStub { [WebMethod] [return: ... Class [System.Web.Services.WebServiceBindingAttribute(Name="StockTraderServiceSoap", Namespace="http://www.bluestonepartners.com/schemas/StockTrader")] public class StockTraderProxy : ➥ System.Web.Services.Protocols.SoapHttpClientProtocol...

Ngày tải lên: 05/10/2013, 08:48

... out incoming service requests based on security tokens. Note that business components can implement custom security checks through mechanisms such as code access security (CAS) and Active Directory ... StockTraderServiceAgent Code Listing using System; using StockTraderTypes; namespace StockTraderServiceAgent { public class StockTraderServiceAgent : StockTraderTypes.IStockTrader { public StockTraderServiceAgent(){} public ... for full code listings. Figure 4-5. Client console application for the StockTraderContracts Web service CHAPTER 4 ■ DESIGN PATTERNS FOR BUILDING SERVICE-ORIENTED WEB SERVICES74 701xCH04.qxd...

Ngày tải lên: 05/10/2013, 08:48

... Type [System.Xml.Serialization.XmlTypeAttribute(Namespace= "http://www.bluestonepartners.com/schemas/StockTrader/")] public class AcknowledgeMessage { public bool AcceptedToQueue; } The sample project does not include code for processing ... Receiver (i.e., the client) public class StockTraderResponseReceiver : SoapReceiver { protected override void Receive( SoapEnvelope message ) 390 1c0 9_final.qxd 6 /30/ 04 3:19 PM Page 253 Design Patterns ... the following application design for a StockTrader application for mutual fund trades, which cannot be executed until after the stock exchange closes for the day. Clients can send trade requests...

Ngày tải lên: 05/10/2013, 08:51

... (actual == tc.expected) r = new TestCaseResult(tc.id, tc.input, tc.expected, actual, "Pass"); else r = new TestCaseResult(tc.id, tc.input, tc.expected, actual, "*FAIL*"); tcr.Add(r); } ... SqlConnection("Server=(local); Database=dbTestPoker;Trusted_Connection=yes"); isc.Open(); osc.Open(); SqlCommand scSelect = new SqlCommand("SELECT * FROM tblTestCases", isc); SqlDataReader sdr = scSelect.ExecuteReader(); string caseid, ... SqlConnection("Server=(local); Database=dbTestPoker;Trusted_Connection=yes"); SqlConnection osc = new SqlConnection("Server=(local); Database=dbTestPoker;Trusted_Connection=yes"); SqlCommand scSelect = new SqlCommand("SELECT * FROM tblTestCases", isc); isc.Open(); osc.Open(); SqlDataReader...

Ngày tải lên: 05/10/2013, 14:20

... Module 2: Architecture and Structural Design Patterns 19 The Business Template Components Data Access Layer Connected Business Logic Layer Disconnected Business Logic Layer Facade Layer Business ... constructed in the village. 18 Module 2: Architecture and Structural Design Patterns The Web Template Components Data Access Layer Connected Business Logic Layer Disconnected Business Logic ... Design Patterns Used in Architecture The purpose of this section is to introduce students to creational and structural design patterns that can be used to create a logical architecture. In...

Ngày tải lên: 19/10/2013, 02:15

... subscriber objects are notified. For example, consider a component that needs to monitor stock prices. A stock ticker component could publish all stock prices as they occur. Subscriber components ... Logical Design and Behavioral Design Patterns 11 ATM Architecture Template Data Access Layer Connected Business Logic Layer Disconnected Business Logic Layer Facade Layer Business Facade Transactional ... element Description Pattern name Authentication Problem The system must authenticate clients and check access on each method call from a client. Solution Create an Authenticator class that...

Ngày tải lên: 19/10/2013, 02:15