phần ii service design patterns
Bài tập lớn KIẾN TRÚC VÀ THIẾT KẾ PHẦN MỀM Creational Design Patterns
... I.Creational Design Patterns: Singleton Ý Nghĩa : “Đảm bảo lớp có thể cung cấp biến toàn cục để truy cập nó”Singleton ... sử dụng để ràng buộc thành phần khác để cụ thể triển khai công cụ địa (Java AWT) javax.swing.LookAndFeel - Abstract Factory swing để swithct số giao diện cho thành phần hiển thị (Java Swing) ... để khởi tạo Đề cập đến đối tượng tạo thông qua giao diện phổ biến Mẫu thiết kế : Behavioral Design Patterns: 1.Chain of Responsibility Ý nghĩa : Chain of Responsibiliy cho phép đối tượng để gửi...
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Design Patterns for Building Service-Oriented Web Services
... 7/17/06 1:05 PM Page 73 CHAPTER ■ DESIGN PATTERNS FOR BUILDING SERVICE- ORIENTED WEB SERVICES [System.Web.Services.WebServiceBindingAttribute(Name="StockTraderServiceSoap", Namespace="http://www.bluestonepartners.com/schemas/StockTrader")] ... 78 CHAPTER ■ DESIGN PATTERNS FOR BUILDING SERVICE- ORIENTED WEB SERVICES StockTraderServiceAgent: The service agent used by the business component for communicating with external services StockTraderTypes: ... the service request workflow, starting with the external StockQuoteExternalService Web service The External Web Service (StockQuoteExternalService) StockQuoteExternalService is a simple Web service...
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Design ejb design patterns phần 2 pot
... withdrawFunds depositFunds getBalance Client A LoanServices Session Bean Client B Client C Network isPersonApprovable approveLoan createLoan InvestmentServices Session Bean buyStock getStockInfo sellStock ... solution is to add a layer of services (implemented as session beans or plain Java classes) that encapsulate this reusable, use-case-independent business logic This services layer is hidden from ... in their designs carefully, asking themselves if the use case is of a synchronous or asynchronous nature This will be a decisive factor in choosing one pattern over the other Related Patterns...
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Design ejb design patterns phần 3 ppsx
... business method definition and implementation 43 CHAPTER Inter-Tier Data Transfer Patterns Inter-tier data transfer patterns answer the fundamental question: How can you get data from the server ... non-distributed Java application development world This chapter covers the following patterns: Data Transfer Object The essential design pattern Discusses why, how, and when to marshal data across the network ... bundles called data transfer objects (DTOs) The two follow-up patterns (Domain and Custom DTO) provide guidance about how DTOs should be designed Domain Data Transfer Object Interacting with the...
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Design ejb design patterns phần 4 doc
... with the JDBC for Reading pattern 67 CHAPTER Transaction and Persistence Patterns This chapter contains a set of diverse patterns that solves problems involving transaction control, persistence, ... transactions, and so on To go to a non-OO method of data access seems like a step back Like all design patterns, there are trade-offs Using JDBC for reading purposes has the following advantages: ... is now coupled to the JDBC APIs and is thus coupled to a relational database However, other design patterns such as the Data Access Object pattern (not covered in this book) can be used to alleviate...
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Design ejb design patterns phần 5 ppsx
... following code: public class ForumServicesDelegate { ForumServices sb; public ForumServicesDelegate() throws DelegateException { try { ForumServicesHome home = (ForumServicesHome) EJBHomeFactory.getFactory().lookUpHome ... map to both architectures 99 100 Chapter Four ForumServices Delegate ForumServices Delegate delegates to postMessage addReply createForum ForumServices Delegate postMessage addReply createForum ... is reusable in any environment (applet, servlet, standalone, even in between EJBs) Related Patterns Service Locator (Alur, et al., 2001) Factory (Gamma, et al., 1995) 97 98 Chapter Four Business...
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Design ejb design patterns phần 6 doc
... cases From Requirements to Pattern-Driven Design Application Layer Patterns Because this book is about EJB design patterns, it does not contain any patterns that would change the actual architecture ... three design patterns, none of which change the architecture of the entity beans themselves, but some of which provide some pretty creative utility EJB to generate primary keys Services Layer Patterns ... methods execute() //getter methods Services Layer with Command pattern Other Services Layer Patterns The Session Faỗade, Message Faỗade and Command patterns illustrated how our use cases...
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Design ejb design patterns phần 7 ppsx
... System’s * services layer * * @return a suite of tests for the Back Office System’s * services layer EJB Development Process */ public static Test suite() { ServiceLayerTestSuite suite = new ServiceLayerTestSuite(); ... junit.framework.TestSuite; /** The ServiceLayerTestSuite is a TestSuite that is specialized for * testing the behavior of the services layer of My System */ public class ServiceLayerTestSuite extends ... The services layer, for example, which forms the behavioral boundary of your application, is one of the highest-value test points in your architecture This is true for several reasons: The service...
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Design ejb design patterns phần 8 doc
... fact that entity beans are components Despite the fact that this is a book on EJB design patterns, many of the patterns in this book that apply to entity beans also apply to any other domain model ... beans, the Session Faỗade pattern became the de facto way to design EJB systems, both as a performance enhancer and also as way to design better systems When using the Session Faỗade pattern, ... Objects (JDO) 197 CHAPTER EJB Design Strategies, Idioms, and Tips This chapter contains a set of fine-grained strategies, idioms, and tips for effective EJB application design and implementation...
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Design ejb design patterns phần 9 pot
... class ForumServicesDelegate implements Serializable { private transient TestSession sb; private Handle remoteHandle; public ForumServicesDelegate() throws DelegateException { try { ForumServicesHome ... ForumServicesDelegate() throws DelegateException { try { ForumServicesHome home = (ForumServicesHome) EJBHomeFactory.getFactory().lookUpHome (ForumServicesHome.class); 231 232 Appendix this.sb = home.create(); //store ... } } private ForumServices getEJB() throws DelegateException { //test if the delegate was serialized try { if (sb == null) { //if so, recreate session bean reference sb = (ForumServices) PortableRemoteObject.narrow...
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Design ejb design patterns phần 10 pot
... E., R Helm, R Johnson, and J Vlissides 1995 Design Patterns: Elements of Reusable Object-Oriented Software Addison-Wesley Gamma, E., et al 1994 Design Patterns: Elements of Reusable Object-Oriented ... in Software Design. ” Pattern Languages of Program Design 2, Vlissedes, Coplien, and Kerth, eds Addison-Wesley Cockburn, A 2000 Writing Effective Use Cases Addison-Wesley “Exception Patterns. ” ... Pattern Languages of Program Design 2, Vlissedes, Coplien, and Kerth, eds Addison-Wesley 241 242 References Carey, J., B Carlson, and T Graser 2000 San Francisco Design Patterns Addison-Wesley Coad,...
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C# 3.0 Design Patterns PHẦN 3 pps
... long-term design of an extensible system Implement it Pattern Comparison The careful reader might have noticed that the three patterns described in this chapter seem to offer much the same service ... 48 | Chapter 2: Structural Patterns: Decorator, Proxy, and Bridge Chapter CHAPTER Structural Patterns: Composite and Flyweight The Composite and Flyweight structural patterns apply to systems ... object mechanisms the patterns use (see Table 2-2) and draw conclusions about their comparative operation This summary is based on the UML diagrams and theory code for each of the patterns In each...
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C# 3.0 Design Patterns PHẦN 4 ppsx
... original Chapter 4: Structural Patterns: Adapter and Faỗade From new to original Chapter CHAPTER Creational Patterns: Prototype, Factory Method, and Singleton The creational patterns aim to separate ... Comparison The Adapter pattern has much in common with the patterns discussed in Chapter The differences are in the intents of the patterns A bridge, for example, separates an interface and its ... picture, we can classify the Adapter and Faỗade patterns according to the mechanisms shown in Table 4-2 Table 4-2 Comparison of Adapter and Faỗade patterns Mechanism Adapter Faỗade Original Adaptee...
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C# 3.0 Design Patterns PHẦN 6 doc
... transitions) Both patterns are concerned with polymorphism Both patterns define a parent interface or abstract class and a series of subclasses that implement the methods therein And both patterns have ... (e.g., clerks in a bank) A different design is required to accommodate the latter case This design is shown in the upcoming example code 166 | Chapter 8: Behavioral Patterns: Chain of Responsibility ... The Strategy pattern makes it easy to add other criteria and sorts to the animator as needed Design The design of the Strategy pattern is encapsulated in the UML diagram in Figure 7-2 Within a given...
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C# 3.0 Design Patterns PHẦN 7 pptx
... photo-editing programs Command Pattern | 175 Figure 8-5 Command pattern illustration—menus Design The design of the Command pattern is shown in Figure 8-6 The Client has a certain way of saying ... { public void ClientMain( ) { new Command (new Receiver( )); Execute( ); Redo( ); Undo( ); Set("III"); Execute( ); Console.WriteLine( ); new Command2 (new Receiver2( )); Set("houses "); Execute( ... uploaded 186 | Chapter 8: Behavioral Patterns: Chain of Responsibility and Command Pattern Comparison A similarity between the Chain of Responsibility and the Command patterns is that they decouple...
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C# 3.0 Design Patterns PHẦN 9 ppsx
... and design patterns have been cataloged by a number of researchers Design patterns are mostly seen as solutions to software design issues They are, of course, not the only solution to software design, ... introduced the concept of design patterns in civil architecture in 1977; they were later adapted to software design The academic and commercial interest in software design patterns has grown dramatically ... 11: The Future of Design Patterns backdrop of software engineering, design patterns can be seen to present some of their own challenges: Traceability The traceability of a design pattern is hard...
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Design Patterns FOR Dummies phần 2 doc
... 37 38 Part I: Getting to Know Patterns Knowing how various design patterns work also gives you a way of talking to other people who are familiar with those design patterns Most professional programmers ... actions in code Much of what design patterns are all about has to with making sure you’re setting up the way you attack the problem correctly Working with design patterns often means spending ... rest of your code Design patterns are particularly big on encapsulation One of the primary design insights here is that you should encapsulate what changes the most A number of patterns revolve...
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Design Patterns FOR Dummies phần 3 potx
... chain of objects There are two design patterns coming up in this chapter — the Observer design pattern, and the Chain of Responsibility design pattern The Observer design pattern lets several observer ... beats a monolith Both the design patterns discussed in this chapter are about sending notifications to other objects The Observer and Chain of Responsibility design patterns implement what’s ... Gang of Four book (Design Patterns: Elements of Reusable Object-Oriented Software, 1995, Pearson Education, Inc Publishing as Pearson Addison Wesley) says that the Observer design pattern should...
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Design Patterns FOR Dummies phần 5 pps
... Part I: Getting to Know Patterns Part II Becoming an OOP Master I In this part n this part, you get the inside scoop on patterns and object-oriented programming (OOP) Patterns have a great deal ... are just plain wrong The design patterns in this part are there to point you to a better way Chapter Fitting Round Pegs into Square Holes with the Adapter and Facade Patterns In This Chapter ... work with This chapter comes to the rescue by covering two design patterns: the Adapter pattern and the Facade pattern The Adapter design pattern lets you adapt what an object or class has to...
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- design patterns for great software
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