Enterprise beans

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  • This lesson introduces you to J2EE applications programming, and the J2EE SDK by showing you how to write a simple thin-client multitiered enterprise application that consists of an HTML page, servlet, and session bean.

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  • This chapter identify the constituents of an Enterprise JavaBean; define a bean class, EJB object, home interface, home object and deployment descriptors; define a stateless session bean; write programs related to stateless session beans; compile and deploy stateless session beans.

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  • Enterprise JavaBeans (EJB) is a managed, server-side component architecture for modular construction of enterprise applications. The EJB specification is one of several Java APIs in the Java EE specification. EJB is a server-side model that encapsulates the business logic of an application.The EJB specification intends to provide a standard way to implement the back-end 'business' code typically found in enterprise applications (as opposed to 'front-end' interface code).

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  • Enterprise Java Bean là các thành phần công nghệ phía máy chủ dùng để đóng gói lớp logic nghiệp vụ (business logic) và hổ trợ mạnh việc thực hiện các giao tác và bảo mật.

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  • Enterprise Java Bean là các thành phần công nghệ phía máy chủ dùng để đóng gói lớp logic nghiệp vụ (business logic) và hổ trợ mạnh việc thực hiện các giao tác và bảo mật. Enterprise Java Bean cũng có một tích hợp một ngăn xếp cho messaging, scheduling, remote access, web service endpoints (SOAP and REST), dependency injection, component life cycle,..vv.

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  • Session Objectives: Identify the constituents of an Enterprise, JavaBean, define a bean class, EJB object, home interface, home object and deployment descriptors, define a stateless session bean, write programs related to stateless session beans, compile and deploy stateless session beans.

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  • Hình2.3:sơ đồ tầng Web tier Business tier: Business tier là một lớp logic dùng để thực hiện việc xử lý của hệ thống J2EE server. Hình2.4: sơ đồ tầng Business tier. Hình vẽ minh họa cho ta thấy 1 Enterprise Bean có thể nhận dữ liệu từ client, xử lý nó (nếu cần thiết) và gửi nó đến EIS tier (Enterprise Information System tier) để lưu trữ.

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  • This book has been a project spanning several years. Many have commented that the first edition was one of the best technical books they ever read. What’s made this book a reality are the many people that aided in its development. We took a big risk in developing the second edition of this book and decided to build the book on the Web. We received feedback from around the world when writing this book, and thus we have an evolving list of contributors and reviewers.

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  • ChargeCodeLocal.java is the local EJB interface for the ChargeCode entity bean that inherits from ChargeCodeInt.ChargeCodeLocalHome.java is the Home interface for the ChargeCode entity bean. It defines the methods for finding and creating ChargeCode entity beans.

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  • Click Finish. WAR tập tin hộp thoại Properties: • Click Next. Chọn phần hộp thoại Type: • Chọn Servlet (nếu nó chưa được chọn) • Kích Next. Hợp phần chung hộp thoại Properties: • Hãy chắc chắn rằng BonusServlet được chọn cho các lớp Servlet. LESSON 1 BEAN PHẦN SIMPLE

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  • OMG PRESS CT Arrington, Syed Rayhan ™ TimeEntryEntityBean TimeEntryInt.java TimeEntryLocal.java is the local interface for the TimeEntry entity bean. It defines the locally accessible methods for the TimeEntry entity bean. This is shown in Figure 01. TimeEntryLocal + getHours() : int + getDate() : Date + getChargeCode() : ChargeCodeLocal + getTimecard() : TimecardLocal + setHours(hours : int) + setDate(day : Date) + setChargeCode(code : ChargeCodeLocal) Figure 01 Local interface of the TimeEntry entity bean. package com.wiley.compBooks.EJwithUML.TimeCardDomain; import java.util.

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  • 10 ChargeCodeEntityBean /** Create a ChargeCodeBean with the specified parameters. This Æ is never called directly. */ public ChargeCodePK ejbCreate(long id, String name, String description, ProjectLocal project) throws CreateException { setId(id); setName(name); setDescription(description); return null; } /** Actions performed after creation. This is never called directly. */ public void ejbPostCreate(long id, String name, String description, ProjectLocal project) { setProject(project); } } ClientEntityBean ClientInt.java ClientInt.

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  • 30 RecordTimeWorkflowSessionBean { /** Answers a reference to the newly created Activity bean. */ public RecordTimeWorkflow create(String username) throws RemoteException, CreateException; } RecordTimeWorkflowBean.java RecordTimeWorkflowBean.java is the implementation class for the RecordTimeWorkflow session bean. Most of this code should be somewhere between familiar and monotonous, by this point. However, there is one new wrinkle, as the ejbCreate method finds a User entity bean based on the username parameter. This bean reference is kept for the duration of the stateful session.

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  • Includes more than 30 percent revised material and five new chapters, covering the new 2.1 features such as EJB Timer Service and JMS as well as the latest open source Java solutions The book was developed as part of TheServerSide.com online EJB community, ensuring a built-in audience Demonstrates how to build an EJB system, program with EJB, adopt best practices, and harness advanced EJB concepts and techniques, including transactions, persistence, clustering, integration, and performance optimization...

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  • This event is most important for the Social Network of Latin America and the Caribbean. The network has allowed La Red Social to cooperate among various countries in the struggle against poverty. It recently also completed an important study of the potentials and the limitations of social funds. Social funds, created as instruments of the social policy pursued by each country, were designed to mobilize resources rapidly for the financing of social action programs.

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  • This chapter include objectives: Discuss component architecture, describe distributed object architecture, discuss RMI, explain RMI-IIOP, discuss the Java Naming and Directory Interface. Inviting you to refer.

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  • Compilation of all Java™ source files is no longer the only step necessary to build many Java-based projects. For the typical HelloWorld program, book examples, and simple applets, source file compilation is sufficient. Complex Java-based projects, like web applications or Swing-based programs (such as JBuilder), require much more. Up-to-date sources must be retrieved from source control. Dependencies not automatically handled by the Java compiler need to be managed. Various classes must be bundled and delivered to multiple locations, sometimes as JAR or WAR files.

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  • Với phiên bản mới nhất của các chi tiết kỹ thuật cho Java servlet và Enterprise Java Beans, Sun đã chuyển sang một định dạng XML thông tin cấu hình của nó. Ở đây chúng ta chỉ đơn giản nó là như thế nào để làm như vậy cho các chương trình của chúng ta bằng cách sử dụng XPath.

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