WA1088 J2EE Architecture and Patterns using Eclipse and JBoss Training and Courseware Course Outline

WA1088 J2EE Architecture and Patterns using Eclipse and JBoss Training and Courseware Course Outline

Chapter 1. Introduction
	Introduction Objectives Java Web Application Architecture J2EE Architecture Web Application Programming Model – MVC Patterns Factory Method Singleton Command Modeling the Structure Aspect of Command Pattern Modeling the Behavior Aspect of Command Pattern Facade Adapter Proxy Publish-Subscribe Modeling the Structural Aspect of the Publish-Subscribe Pattern Modeling the Behavioral Aspect of the Publish-Subscribe Pattern

Chapter 2. Presentation Tier Patterns
	Objectives Why use the intercepting filter pattern? Uses for Filtering What is a filter? Features of filters The Filter interface How a filter works In what order? A simple logging filter Configuring the filter Mapping the filter The Web Deployment Descriptor Common filter tasks Request and Response Wrappers How Struts uses this design pattern? Front Controller Pattern Command and Controller Strategy Advantages of command and controller strategy How Struts uses this strategy? View Helper Pattern Use JavaBean as result bean helper Use JavaBean as command bean helper Use custom tag for display logic written in Java Components of a Tag library JSTL Overview How Struts uses this pattern Problem Solution 1 – use jsp:include Solution 2 – use Struts templates Solution 2 continued Transform View Pattern The Music Collection Example – Sample XML file The Music Collection Example – Retrieving owner details The Music Collection Example – Retrieving the core data The Music Collection Example – Current Output Transformation with Java Reading an XML Transforming to HTML Transforming to System.out Summary

Chapter 3. Presentation Tier Design Considerations
	Objectives HttpSession Why on the server? Session Tracking Options URL Rewriting Do not store large Object Graphs in HttpSession Session and Clustering The problem The design pattern that fixes it A client side fix Struts implementation Typical validation rules Client-side validations Jakarta commons validation framework features Not resetting JavaBeans between requests Passing HttpServletRequest to business tier Summary

Chapter 4. Business and Integration Tier Patterns
	Objectives Business Delegate Pattern How it works Data Transfer Object Pattern DTO Example (Output) DTO Example (Input) Role of DTO in MVC Trouble with DTO Value Object Pattern Multiple Value Objects Best Practice – derive EJB from the Value Object Composite Entity Pattern An example Class Diagram How the client interacts Value Object Assembler Value List Handler How does it work? How does it work - continued Design Considerations Service Locator Data Access Object (DAO) DAO Implementation Guidelines Service Activator MDB- Integrating JMS and EJB Message-Driven Beans Are Different From Other EJBs Message-Driven Beans are Stateless Message-Driven Bean Interfaces Example: Message Counter Class MessageCounter Class MessageCounter Processing the Message Deployment Descriptor Entry Summary

Chapter 5. Business and Integration Tier Best Practices
	Objectives Exception Handling Exception Handling (cont.) Use java:comp to locate resources Example: Defining Data Source Resource Reference in WebSphere Studio Use java:comp to locate resources - continued Use Container Authentication. Use JDBC Connection Pooling Prepared Statement Cache. Release JDBC Resources Optimize database first DB2 Tuning - MaxAppls DB2 Tuning - MaxAgents DB2 Tuning - Buffer Pool Tuning DB2 Tuning - Configuring buffpage DB2 Tuning - Evaluating the buffer pool size DB2 Tuning - Monitoring the database buffer pool DB2 Tuning - reorgchk Using log4j from an Web application Using Log4J Example servlet using log4j Summary

Chapter 6. Other EJB Patterns
	Objectives Session Façade Session Façade Pattern Session Façade Miscellaneous Details Message Façade Pattern Message Façade Message façade pattern shortcomings Version Number pattern Version Number Pattern Sequence Blocks Stored Procedures for Autogenerated Keys Fast Lane Pattern Summary

Chapter 7. Transaction Management
	Topics What is a transaction? ACID properties Transaction demarcation Resource managers Isolation levels Isolation Level WebSphere - Setting Isolation Level for EJB WebSphere - CMP EJB Access Intent WSAD - Setting Access Intent WSAD - Setting Data Source Isolation Level WebLogic – Isolation Level Basics Manage your own transactions Change isolation level EJB Transaction Basics Transaction Propagation Client Managed Transaction Bean Managed Transaction Container Managed Transaction Transaction Outcome Vetoing Transaction Let the container manage transactions CMT and the Session Façade CMT and other EJBs Transactions and Message Driven Beans Distributed transaction Two-phase commit Aborting a global transaction Optimizations Window of doubt JMS, EJB, XA Using XA-enabled data source Increase concurrency by reducing transaction isolation level Keep transactions short Multi-step wizard “the wrong way” What’s wrong? Multi-step wizard “the right way” Summary

Chapter 8. Performance
	Topics Overview Visitor, hit, user Load, throughput, response time Response time Effect of load on the system Saturation and buckle points Scaling Performance and scalability are different! Problem Areas CPU utilization Measure CPU utilization everywhere Symptoms of underutilization What causes underutilization? Network capacity problem? Synchronization problem? Slow external resource? Is the test pushing the system hard enough? Does your system scale? Symptoms of burstiness Infrequent synchronization problem? Test driver synchronization problem? Slow back-end systems? Slow garbage collection? Timeout problems? Erratic network traffic? Symptoms of overutilization The components of CPU usage High User CPU High System CPU High Wait CPU Server hanging Thread dump in WebSphere v5 Thread dump file Uneven cluster loading Load balancer configured correctly? Plan of attack Overview What is WPT? Download and install record Configure your system to use record Record a session Output from record Details of running a stress test Best Practices Summary

Chapter 9. Messaging Tier Patterns
	Objectives Java Message Service JMS Programming: Overview The JMS Interfaces JMS PTP Programming: Example One-to-one (Local) One-to-one (Remote) Request-Reply One-to-Many Many-to-one Many-to-one With Reply Many to Many Hub and Spoke Route to different queues based on message content Break a composite message and process separately Combine related messages to a single message Send Large Messages Using the Memento Pattern Summary

Chapter 10. Architecting Security
	Objectives Security Functionality What Can You Secure? Challenge Mechanism Basic Challenge Client Certificates Form-based Authentication Form-based Authentication in J2EE User Registry LDAP User Registry Custom User Registry HTTP Single Sign On (SSO) HTTP Single Sign On (cont.) J2EE Authorization Model WebSphere Authorization Model Protecting Web Resources Protecting EJB Methods EJB Delegation Policies Delegation Scenario Form Based Logout Architecture Guidelines

Chapter 11. Build and Deployment
	What is Ant? Writing a Build Script How to run Ant? Using ant from WSAD Running Ant in WSAD Advanced Task Automating Deployment WebSphere Deployment Tasks

Chapter 12. JUnit and Eclipse
	Objectives What is JUnit? Who uses JUnit? Why JUnit? The xUnit Philosophy A JUnit Test Running the tests Swing-based Test Runner Text-based Test Runner JUnit Basics assertTrue assertEquals assertSame assertNull The failure message The Test Class The Test Method The Test Suite JUnit Design JUnit with Ant JUnit with Eclipse Create a Test Case Running Tests Eclipse Test Runner Icons Rerun an individual test Failure Trace Debug with JUnit Test Suite Wizard Testing Strategies Specific Techniques Testing simple Java classes Testing with databases Testing web applications Test-Driven Design Test-Driven Design Parting Thoughts Summary

Chapter 13. Struts Architecture and Overview
	Objectives Review: MVC Model Review: Request, Session and Application What is Struts? Struts Flow Components in Struts The Model The View The Controller Struts Flow struts-config.xml struts-config.xml Content The element in the struts-config.xml The element in the struts-config.xml The element in the struts-config.xml The element in the struts-config.xml Sample struts-config.xml The Role of web.xml for the Application Configuring Struts in the web.xml web.xml Content Steps to Configuring Struts in the web.xml Step 1. Configuring the Action Servlet Instance in the web.xml Action Servlet Config Example Step 2. Configuring the Action Servlet Mapping in web.xml Prefix Mapping Example Extension Mapping Example Step 3. Configuring the Struts Tag Libraries in the web.xml Sample web.xml Summary