... quyết cc vấn đề trong một
lĩnh v c nào đó .C c mẫu đư c lập sưu liệu bằng c ch dùng cc template, cc template
cung c p cc heading bên dưới c chứa chi tiết c a mẫu và c ch th c nó làm vi c cho ... cc ch c năng bổ sung cho cc đối tượng riêng biệt một c ch động và trong
suốt, nghĩa là không chịu ảnh hưởng (t c động ) c a cc đối tượng kh c.
- Cho cc ch c năng mà cc 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 cc câu
đó. Trong ví dụ c thể này, nó miêu tả c ch th c xây dựng c u tr c ngữ pháp cho cc
biểu diễn thông thường, c ch thức...
... bạn c n cung c p cc hành vi cho tất ccc kiểu con. Bình
thường, cc Component không ccc thể hiện, cc lớp con ho ccc lớp th c thi c a nó, gọi là cc nốt, c thể
c thể hiện và đư c sử ... bằng cc phương th c của mình sẽ th c hiện cc ch c
năng abstractionOp() c a lớp Abstraction
o Implementation: là giao tiếp th c thi c a lớp cc 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 ccc 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...
... 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...
... e-commerce
scenario. The designpatterns 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...
... 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...
... 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...
... 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...
... Module 2: Architecture and Structural DesignPatterns 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 DesignPatterns
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 designpatterns that can be used to create a logical architecture.
In...
... 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 DesignPatterns 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...