phần ii service design patterns

... theappropriate next step Trang 13some-Part IIIThe Part of Tens Trang 14In this part In this part, you see ten more design patterns — the rest of the Gang of Four patterns, and some new ones thatdon’t ... work.Besides getting the remaining Gang of Four patterns, you also get a glimpse of some more modern patterns here that don’t come from the GoF These patterns are all in very common use today and ... with these patterns, make suggestions andcomments, and post all kinds of feedback If you want to get involved withpatterns and their use today, take a look at the site Another good patterns site

Ngày tải lên: 12/08/2014, 16:21

... with patterns you get experience reuse. intro to Design Patterns Your BRAIN Your Code, now new and improved with design patterns! A Bunch of Patterns swim() display() performQuack() performFly() ... developers who’ve been down the same design problem road and survived the trip Before we’re done, we’ll look at the use and benefits of design patterns, look at some key OO design principles, and walk ... the last 10 years Since Design Patterns: Elements of Reusable Object-Oriented Software first came out, developers have applied these patterns thousands of times The patterns we summarize in

Ngày tải lên: 12/08/2014, 19:20

... OO design techniques Q: Okay, I understand Observable, but how do I generally design something to be extensible, yet closed for modification? A: Many of the patterns give us time tested designs ... important design principles: Our goal is to allow classes to be easily extended to incorporate new behavior without modifying existing code What do we get if we accomplish this? Designs that ... this approach by thinking about how the design might need to change in the future What requirements or other factors might change that will impact this design? Price changes for condiments will

Ngày tải lên: 12/08/2014, 19:20

... flexibility to designs, that much is for sure, but I also have a dark side You see, I can sometimes add a lot of small classes to a design and this occasionally results in a design that’s less ... Starbuzz code It’s time to whip this design into some real code Let’s start with the Beverage class, which doesn’t need to change from Starbuzz’s original design Let’s take a look: public abstract ... to see a much better way of creating decorated objects when we cover the Factory and Builder Design Patterns. File Edit Window Help CloudsInMyCoffee Wrap it with a Mocha. Wrap it in a second Mocha.

Ngày tải lên: 12/08/2014, 19:20

... pattern The next several panels describe the templates used in Design Patterns and in Patterns in Java. Design Patterns template Design Patterns uses the following template: * Pattern name and classification: ... 1-2-3 You can contact David atdavid@gallardo.org Trang 4Section 2 Design patterns overviewA brief history of design patterns Design patterns were first described by architect Christopher Alexander ... tutorial 2 2 Design patterns overview 4 3 A brief introduction to UML class diagrams 8 4 Creational patterns 10 5 Structural patterns 12 6 Behavioral patterns 15 7 Concurrency patterns 18

Ngày tải lên: 12/08/2014, 19:21

... WrapupSummary Design patterns are a valuable tool for object-oriented design for a number of important reasons: * Patterns provide " a solution to a problem in a context." (Design Patterns, ... Reusable Design Patterns Illustrated with UMLby Mark Grand (Wiley, 1998) is not as well written as Design Patterns, especially regarding general object-oriented design issues, but the patterns ... object-oriented design Chapters 1, 2, and 6 are essential reading for understanding object-oriented design in general or, in particular, the role of patterns in object-oriented design * Patterns in

Ngày tải lên: 12/08/2014, 19:21

... Acknowledgments x Section 1: What Are Design Patterns? 12 Chapter 1 Introduction 13 Defining Design Patterns 14 The Learning Process 15 Studying Design Patterns 16 Notes on Object-Oriented Approaches ... the 23 patterns cataloged in the flagship book Design Patterns by Gamma, Helm, Johnson, and Vlissides In Java(TM)Design Patterns, each of these patterns is illustrated by at least one complete ... nature and purpose of design patterns It also serves as a practical guide to using design patterns to create sophisticated, robust Java programs This book presents the 23 patterns cataloged in

Ngày tải lên: 12/08/2014, 19:21

... paying Where could you use a Factory pattern in designing a program like that? 2 Suppose that you are writing a program to assist homeowners in designing additions to their houses What objects ... and we find examples embedded in Java itself (such as the SocketFactory class) and in other design patterns (such as the Builder pattern, discussed in Chapter 7) In these cases, a single class ... public class Plant { String name; public Plant(String pname) { name = pname; //save name In Design Patterns terms, the abstract Garden class is the Abstract Factory It defines the methods of

Ngày tải lên: 12/08/2014, 19:21

... different fonts and sizes Design the program using a Prototype pattern Programs on the CD-ROM Trang 12 68Summary of Creational Patterns Following is a summary of the Creational patterns: • Factory ... overlap among these patterns and even some overlap with the Behavioral patterns in the next section We'll summarize these similarities after we have described all of the patterns ... instance Trang 13Section 3: Structural Patterns A structural pattern describes how classes and objects can be combined to form larger structures Class and object patterns differ in that a class pattern

Ngày tải lên: 12/08/2014, 19:21

... programming problem of deciding which elements will be which when we construct the composite However, Design Patterns suggests that each element should have the same interface, whether it is a composite ... gray lines over the button borders, erasing them Let's consider how to create this Decorator Design Patterns suggests that Decorators should be derived from some general Visual Component class ... JComponent, and that button will receive all of the GUI method calls that the JComponent receives Design Patterns suggests that classes such as Decorator should be abstract and that you should

Ngày tải lên: 12/08/2014, 19:21

... selections are made in intervals selected by a random timer Each selection must be unique Design Command patterns to choose the winning numbers each week Programs on the CD-ROM Trang 13Chapter ... actionPerformed(ActionListener e) { public interface Command { public void Execute(); public void unDo(); } Then we must design each Command object to keep a record of what it last did so that it can undo it This can ... also constitute commands Clicks on multiselect list boxes could also be represented as commands Design a program that includes these features 2 A lottery system used a random number generator

Ngày tải lên: 12/08/2014, 19:21

... of the most fundamental patterns in JavaScript Not only is it ful by itself, as we have seen in this chapter, but it can be used in some form or another withmost of the patterns in this book For ... your code, the singleton pattern should be used as often as possible It is one of the most useful patterns in JavaScript and has its place in almost every project, no matter how large or small In ... (although that factory may also be a singleton) Don’t be afraid to investigate the more specific patterns in this book, and don’t settle on using a singleton just because it is “good enough.”Make

Ngày tải lên: 12/08/2014, 23:20

... code, embedded in a web page, is in the Chapter 7 code examples on the book’s website, http://jsdesignpatterns.com/ Benefits of the Factory Pattern The main benefit to using the factory pattern is ... implementations, bridges are incredibly useful In fact, they’re probably one of the most underused patterns Of all patterns, this is the simplest to start putting into practice immediately If you’re building ... the more specialized subclasses All of these benefits are related to two of the object-oriented design principles: make yourobjects loosely coupled, and prevent code duplication By instantiating

Ngày tải lên: 12/08/2014, 23:20

... 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...

Ngày tải lên: 30/03/2015, 21:22

... 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...

Ngày tải lên: 05/10/2013, 08:48

... 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...

Ngày tải lên: 09/08/2014, 16:20

... 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...

Ngày tải lên: 09/08/2014, 16:20

... 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...

Ngày tải lên: 09/08/2014, 16:20

... 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...

Ngày tải lên: 09/08/2014, 16:20

... 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...

Ngày tải lên: 09/08/2014, 16:20