JEE Programming - 07 EJB Programming
-
Upload
danairat-thanabodithammachari -
Category
Software
-
view
550 -
download
2
Transcript of JEE Programming - 07 EJB Programming
Module 07 - Enterprise JavaBeans
Danairat T.
Line ID: Danairat
FB: Danairat Thanabodithammachari
+668-1559-1446
JEE and Web Application Development The Course Outline
Module 01 - Introduction to JEE
Module 02 - The JEE Containers
Module 03 - The Model-View-Controller Design Pattern
Module 04 - Java Servlets
Module 05 - Java Server Pages in MVC
Module 06 - JEE Web Application Deployment
Module 07 - Enterprise JavaBeans
Module 08 - JEE Enterprise Application Deployment
Enterprise JavaBeans
A server-side component that encapsulates the business logic of an application. The business logic is the code that fulfills the purpose of the application.
Enterprise beans simplify the development of large, distributed applications. Developer can concentrate on solving business problems.
EJB as a Model in MVC
Servlet/ JSF
JSP/JSF
EJB
1. Request
5. Response
2. Access
3. Access4. Forward
Web Container EJB Container
JEE Server
When to use EJB
• The application must be scalable. To accommodate a growing number of users, you may need to distribute an application’s components across multiple machines. Not only can the enterprise beans of an application run on different machines, but also their location will remain transparent to the clients.
• Transactions must ensure data integrity. Enterprise beans support transactions, the mechanisms that manage the concurrent access of shared objects.
• The application will have a variety of clients. With only a few lines of code, remote clients can easily locate enterprise beans. These clients can be thin, various, and numerous.
• Requiring of Individual Component Monitoring
• Standard Pluggable Security
EJB Type
Enterprise Bean Type Purpose
SessionPerforms a task for a client; optionally
may implement a web service
Message-Driven
Acts as a listener for a particular
messaging type, such as the Java
Message Service API
Hands-on Lab: Creating Basic EJB
1. Click “New Application?” 2. Select “Java EE Web Application”, Click “OK”
Hands-on Lab: Creating Basic EJB
5. Click “New?” from “Model” project 6. Select “Session Bean”, click “OK”
Hands-on Lab: Creating Basic EJB
12. Enter “Name”, click “OK” 13. You will see the new EJB method shown in the code
Hands-on Lab: Creating Basic EJBCreating EJB Client
15. Click “”New Simple Java Client? from the EnterpriseBean
16. Click “OK”
Hands-on Lab: Creating Basic EJBRun the EJB Client
21. You will see the result from EJB in the message window.
Hands-on Lab: Creating EJB, Servlet invokes remote EJB and local EJB
Creating New Application
1. Click “New Application..” 2. Select “Java EE Web Application”, Click “OK”
Hands-on Lab: Creating EJB, Servlet invokes remote EJB and local EJB
3. Enter Application Name 4. Click “Finish”
Hands-on Lab: Creating EJB, Servlet invokes remote EJB and local EJB
5. Click “New” from “Model” project 6. Click “Session Bean”
Hands-on Lab: Creating EJB, Servlet invokes remote EJB and local EJB
7. Click “Next” 8. Click “Next”
Hands-on Lab: Creating EJB, Servlet invokes remote EJB and local EJB
9. Click “Next” 10. Click “Finish”
Hands-on Lab: Creating EJB, Servlet invokes remote EJB and local EJB
11. Click “New Method?” from “Enterprise JavaDeans”
Hands-on Lab: Creating EJB, Servlet invokes remote EJB and local EJB
12. Enter Beans method details 13. You will see the code
Hands-on Lab: Creating EJB, Servlet invokes remote EJB and local EJB
Adding Dependencies to ViewController project
15. Select “Project Properties” from ViewController 16. Click “Edit Dependencies”
Hands-on Lab: Creating EJB, Servlet invokes remote EJB and local EJB
Adding Dependencies to ViewController project
17. Check “Build Output” 18. Click “OK”
Hands-on Lab: Creating EJB, Servlet invokes remote EJB and local EJB
Creating Servlet invoking Remote EJB
19. Click “New” on ViewController” project 20. Click “HTTP Servlet”
Hands-on Lab: Creating EJB, Servlet invokes remote EJB and local EJB
Creating Servlet invoking Remote EJB
21. Enter Servlet Name 22. Click “OK”
Hands-on Lab: Creating EJB, Servlet invokes remote EJB and local EJB
Creating Servlet invoking Remote EJB
23. Click “Finish” 24. Review the import classes for the Servlet
Hands-on Lab: Creating EJB, Servlet invokes remote EJB and local EJB
Creating Servlet invoking Remote EJB
25. Create method in Servlet to get InitialContext of remote EJB Container
Hands-on Lab: Creating EJB, Servlet invokes remote EJB and local EJB
Creating Servlet invoking Remote EJB
26. Make change into the code
Hands-on Lab: Creating EJB, Servlet invokes remote EJB and local EJB
Creating Servlet invoking Remote EJB
27. Click “Run” the servlet
Hands-on Lab: Creating EJB, Servlet invokes remote EJB and local EJB
Creating Servlet invoking Remote EJB
28. The EJB result shown on the WebBrowser
Hands-on Lab: Creating EJB, Servlet invokes remote EJB and local EJB
Creating Servlet invoking Local EJB
29. Click “Open” on the “web.xml” 30. Click “New on Existing EJB” from the “EJB References”
Hands-on Lab: Creating EJB, Servlet invokes remote EJB and local EJB
Creating Servlet invoking Local EJB
31. Click “OK” 32. Click “Save”
Hands-on Lab: Creating EJB, Servlet invokes remote EJB and local EJB
Creating Servlet invoking Local EJB
33. Review the web.xml code
Hands-on Lab: Creating EJB, Servlet invokes remote EJB and local EJB
Creating Servlet invoking Local EJB
34. Click “New..” from “ViewController” 35. Select “HTTP Servlet”, click “OK”
Hands-on Lab: Creating EJB, Servlet invokes remote EJB and local EJB
Creating Servlet invoking Local EJB
36. Enter Servlet Name 37. Click “Next”
Hands-on Lab: Creating EJB, Servlet invokes remote EJB and local EJB
Creating Servlet invoking Local EJB
38. Click “Finish” 39. Review the import classes
Hands-on Lab: Creating EJB, Servlet invokes remote EJB and local EJB
Creating Servlet invoking Local EJB
40. Make change the code
Hands-on Lab: Creating EJB, Servlet invokes remote EJB and local EJB
Creating Servlet invoking Local EJB
41. Click “Run”
Hands-on Lab: Creating EJB, Servlet invokes remote EJB and local EJB
Creating Servlet invoking Local EJB
42. You will see the EJB result on the Web Browser.
Hands-on Lab: Creating EJB,
DataSource, Data Object,
Servlets, HTTP Session,
RequestDispatcher and JSP
Hands-on Lab: Creating EJB DataSource, Data Object, Servlets, HTTP
Session, RequestDispatcher and JSP
Creating New Application
1. Click “New Application..” 2. Select “Java EE Web Application”, Click “OK”
Hands-on Lab: Creating EJB DataSource, Data Object, Servlets, HTTP
Session, RequestDispatcher and JSP
Creating New Application
3. Enter Application Name 4. Click “Finish”
Hands-on Lab: Creating EJB DataSource, Data Object, Servlets, HTTP
Session, RequestDispatcher and JSP
Configuring Project Dependencies
5. Select “Project Dependencies” from “ViewController” 6. Click “Edit Dependencies”
Hands-on Lab: Creating EJB DataSource, Data Object, Servlets, HTTP
Session, RequestDispatcher and JSP
Configuring Project Dependencies
7. Check “Build Output” 8. Click “OK”
Hands-on Lab: Creating EJB DataSource, Data Object, Servlets, HTTP
Session, RequestDispatcher and JSP
Configuring Project Dependencies
9. Finish configuring the project dependencies
Hands-on Lab: Creating EJB DataSource, Data Object, Servlets, HTTP
Session, RequestDispatcher and JSP
Configuring Data Object
10. Click “New” from the “Model” project 11. Select “Class”, click “OK”
Hands-on Lab: Creating EJB DataSource, Data Object, Servlets, HTTP
Session, RequestDispatcher and JSP
Configuring Data Object
12. Enter information, click “OK”
Hands-on Lab: Creating EJB DataSource, Data Object, Servlets, HTTP
Session, RequestDispatcher and JSP
Configuring Data Object
13. Complete the Data Object by adding set, get methods for the variables
Hands-on Lab: Creating EJB DataSource, Data Object, Servlets, HTTP
Session, RequestDispatcher and JSP
Creating EJB invoking DataSource
14. Click “New from “Model” project 15. Select “Session Bean”. Click “OK”
Hands-on Lab: Creating EJB DataSource, Data Object, Servlets, HTTP
Session, RequestDispatcher and JSP
Creating EJB invoking DataSource
16. Enter EJB Name 17. Click “Next”
Hands-on Lab: Creating EJB DataSource, Data Object, Servlets, HTTP
Session, RequestDispatcher and JSP
Creating EJB invoking DataSource
18. Click “Next” 19. Click “Finish”
Hands-on Lab: Creating EJB DataSource, Data Object, Servlets, HTTP
Session, RequestDispatcher and JSP
Creating EJB invoking DataSource
20 Review Import classes for EJB
Hands-on Lab: Creating EJB DataSource, Data Object, Servlets, HTTP
Session, RequestDispatcher and JSP
Creating EJB invoking DataSource
21. Create method for get database connection from the Application Server Pool
Hands-on Lab: Creating EJB DataSource, Data Object, Servlets, HTTP
Session, RequestDispatcher and JSP
Creating EJB invoking DataSource
22. Make change to the code
Hands-on Lab: Creating EJB DataSource, Data Object, Servlets, HTTP
Session, RequestDispatcher and JSP
Creating Servlet Controller
23. Clicl “New..” from “ViewController” 24. Select “HTTP Servler”, click “OK”
Hands-on Lab: Creating EJB DataSource, Data Object, Servlets, HTTP
Session, RequestDispatcher and JSP
Creating Servlet Controller
25. Click “New..” from “ViewController” 26. Click “Next”
Hands-on Lab: Creating EJB DataSource, Data Object, Servlets, HTTP
Session, RequestDispatcher and JSP
Creating Servlet Controller
17. Review import classes
Hands-on Lab: Creating EJB DataSource, Data Object, Servlets, HTTP
Session, RequestDispatcher and JSP
Creating Servlet Controller
18. Create method in Servlet to invoke EJB
Hands-on Lab: Creating EJB DataSource, Data Object, Servlets, HTTP
Session, RequestDispatcher and JSP
Creating Servlet Controller
19. Make change into the code
Hands-on Lab: Creating EJB DataSource, Data Object, Servlets, HTTP
Session, RequestDispatcher and JSP
Creating JSP Form
20. Click “New” from “ViewController” 21. Select “JSP”, click “OK”
Hands-on Lab: Creating EJB DataSource, Data Object, Servlets, HTTP
Session, RequestDispatcher and JSP
Creating JSP Form
22. Enter JSP Name
23. Make change into the code, click “Save”
Hands-on Lab: Creating EJB DataSource, Data Object, Servlets, HTTP
Session, RequestDispatcher and JSP
Creating Result JSP
24. Enter JSP Name 25. Select “JSP”, click “OK”
Hands-on Lab: Creating EJB DataSource, Data Object, Servlets, HTTP
Session, RequestDispatcher and JSP
Creating Result JSP
26. Enter JSP Name 27. Make change JSP code
Hands-on Lab: Creating EJB DataSource, Data Object, Servlets, HTTP
Session, RequestDispatcher and JSP
Testing
28. Click “Run” on JSP Form “index.jsp” 29. See the server started
Hands-on Lab: Creating EJB DataSource, Data Object, Servlets, HTTP
Session, RequestDispatcher and JSP
Testing
30. Enter “M” or others into the form, click “Search” 31. Search result shown on the Web Browser