Contents Preface 1 Introduction Course Objectives 1 2

Contents Preface 1 Introduction Course Objectives 1 -2 Course Environment 1 -4 Course Overview 1 -5 About the Course Applications 1 -8 Order Entry Schema 1 -9 Human Resources (HR) Schema 1 -10 HR Application Flow Diagram 1 -11 Summary 1 -12 2 J 2 EE Overview. Objectives 2 -2 Java 2, Enterprise Edition Platform 2 -3 J 2 EE Platform 2 -4 Benefits of the J 2 EE Platform 2 -5 J 2 EE Components 2 -7 J 2 EE 1. 3 Components 2 -8 J 2 EE Architecture 2 -9 Client-Tier Components 2 -10 J 2 EE Web-Tier Components 2 -11 What Is a Servlet? 2 -13 What Is a Java. Server Page (JSP)? 2 -14 Web-Tier Components: Summary 2 -15 Business-Tier Components 2 -16 Enterprise Java. Beans (EJB) 2 -17 J 2 EE Communication APIs 2 -18 J 2 EE Server 2 -19 Oracle Application Server 10 g Containers for J 2 EE (OC 4 J) 2 -21 J 2 EE Applications 2 -22 Packaging J 2 EE Application Components 2 -23 JARs 2 -24 WARs 2 -25 EJB JARs 2 -26 EARs 2 -27 EAR File Structure for a J 2 EE Application: Example 2 -28 OC 4 J Architecture 2 -29 OC 4 J Server Configuration Files 2 -30 Relation of Configuration Files 2 -31 Data Sources 2 -32 Application Logging 2 -33 J 2 EE Application Deployment to Oracle Application Server 10 g 2 -34 iii

Oracle Enterprise Manager 2 -35 JDeveloper and J 2 EE 2 -36 Oracle JDeveloper 10 g Environment 2 -37 Oracle JDeveloper 10 g Visual Design Tools 2 -38 Summary 2 -39 Practice 2 -1: Overview 2 -40 3 Designing J 2 EE Applications Objectives 3 -2 Realizing J 2 EE Benefits 3 -3 J 2 EE Issues 3 -4 J 2 EE Design Patterns 3 -5 Implementing Design Patterns by Using MVC 3 -6 The Model 3 -7 The View 3 -8 The Controller 3 -9 MVC in Oracle Application Server 10 g Containers for J 2 EE 3 -10 Designing J 2 EE Applications 3 -11 Flow Diagram: Example 3 -12 Summary 3 -13 Practice 3 -1: Overview 3 -14 4 Creating the Web Tier: Servlets Objectives 4 -2 Overview 4 -3 About Java Servlets 4 -4 Principal Features of Servlets 4 -5 Life Cycle of Servlets 4 -6 HTTP Servlets 4 -7 Inside an HTTP Servlet 4 -8 Servlet: Example 4 -9 The do. Get() Method 4 -10 The do. Post() Method 4 -11 The Http. Servlet. Request Object 4 -12 The Http. Servlet. Response Object 4 -13 Methods for Invoking Servlets 4 -14 Your First Servlet 4 -15 Handling Input: The Form 4 -16 Handling Input: The Servlet 4 -17 Initialization and Destruction 4 -18 Error Handling 4 -19 Debugging a Servlet 4 -20 iv

Single. Thread. Model 4 -21 JDeveloper Environment 4 -23 Servlet Mapping 4 -24 Servlet Mapping in JDeveloper 4 -25 Invoking a Servlet 4 -26 Specifying J 2 EE Web Module Settings 4 -27 Creating a Connection to Oracle Application Server 10 g 4 -28 Deploying to OC 4 J 4 -29 Summary 4 -30 Practices 4 -1, 4 -2, and 4 -3: Overview 4 -31 5 Accessing the Database with Servlets Objectives 5 -2 Review of JDBC 5 -3 Querying in JDBC 5 -4 JDBC and Servlets 5 -5 Synchronizing Shared Resources 5 -6 Transaction Handling 5 -7 Connection Pooling 5 -9 Data Sources 5 -10 Data Source Definition 5 -11 data-sources. xml: Example 5 -12 Using Data Sources 5 -13 Summary 5 -14 Practice 5 -1: Overview 5 -15 6 Using Advanced Techniques in Servlets Objectives 6 -2 Overview 6 -3 HTTP Headers 6 -4 Request Headers 6 -5 Sending a Response 6 -6 Response Headers 6 -7 Setting Status Codes 6 -8 Example 6 -9 Sending Multimedia Content 6 -10 Cookies 6 -12 Setting Cookies 6 -13 Retrieving Cookies 6 -14 About State Preservation 6 -15 State Preservation: Example 6 -16 v

Servlet. Context 6 -17 Request. Dispatcher 6 -18 Request. Dispatcher: Example 6 -19 Servlet Filters 6 -20 Using Filters 6 -21 do. Filter() Method 6 -22 Using Filters 6 -23 Configuring Filters 6 -24 Application Lifecycle Events 6 -25 Servlet. Context Events 6 -26 Http. Session Events 6 -27 Example of an Event Listener 6 -28 Error Handling 6 -29 Summary 6 -30 Practices 6 -1 and 6 -2: Overview 6 -31 7 Maintaining State in J 2 EE Applications Objectives 7 -2 Overview 7 -3 Session Basics 7 -4 Threading 7 -6 URL Rewriting 7 -7 Http. Session 7 -8 Session Objects 7 -9 Session-Based Page Counter 7 -10 Session Life Cycle 7 -11 Session Tracking in OC 4 J 7 -12 Sessions and Events 7 -13 Creating Distributable Applications 7 -17 Summary 7 -18 Practice 7 -1: Overview 7 -19 vi

8 Creating the Web Tier: Java. Server Page Objectives 8 -2 Java. Server Pages 8 -3 Comparing Servlets and JSPs 8 -4 Invoking JSPs 8 -5 The Date JSP 8 -6 The Date Servlet 8 -7 Automated JSP Features 8 -8 JSP Life Cycle 8 -9 Basic JSP Elements 8 -10 Declarations 8 -11 Expressions 8 -12 Scriptlets 8 -13 Implicit Objects 8 -14 Example 8 -16 Directives 8 -18 include: Example 8 -19 page Directive 8 -20 JSP and Java. Beans 8 -22 Using Java. Beans with JSP 8 -23 scope Attribute of <jsp: use. Bean> Tag 8 -25 Accessing and Setting Bean Property 8 -26 JSP XML Document 8 -28 Traditional Syntax Versus XML Syntax 8 -29 JDeveloper and JSPs 8 -31 Creating JSPs Visually 8 -32 JSP Tag Insight 8 -33 Summary 8 -34 Practices 8 -1, 8 -2, and 8 -3: Overview 8 -35 9 Modularizing Java. Server Pages Development with Tags Objectives 9 -2 Custom Tags 9 -3 Custom Tag Library Components 9 -4 Tag Handler: Example 9 -5 Tag Library Descriptors 9 -6 Using a Custom Tag 9 -7 Tags with Attributes 9 -8 Creating a Custom Tag in JDeveloper 9 -9 Tag Libraries in JDeveloper 9 -10 Registering Tag Libraries 9 -11 Using Tag Insight 9 -14 vii

JSP Standard Tag Library (JSTL) 9 -15 Core Tag Library 9 -16 Utilizing Core Tags 9 -18 Expression Language 9 -19 Using Iteration Tags 9 -20 Using the URL Tags 9 -21 XML Tag Library 9 -23 SQL Tag Library 9 -24 Accessing a Database with SQL Tags 9 -25 Querying Using SQL Tags 9 -26 Inserting, Updating, and Deleting Data 9 -27 Formatting Tags 9 -28 Internationalization Concepts 9 -29 Internationalizing Strings 9 -30 Formatting Numbers and Dates 9 -31 Transforming XML Documents 9 -34 JSTL in JDeveloper 9 -35 Summary 9 -36 Practice 9 -1: Overview 9 -37 10 Communicating in J 2 EE 1. Objectives 10 -2 2. Overview of RMI 10 -3 3. Role of RMI in J 2 EE 10 -4 4. Communication in a J 2 EE Environment 10 -5 5. How Clients Locate a Distributed Component 10 -7 6. Java Naming and Directory Interface (JNDI) 10 -8 7. J 2 EE Container and JNDI Interface 10 -9 8. Naming Service 10 -10 9. JNDI Terminology 10 -11 10. Main JNDI Class and Interface 10 -12 11. Accessing an Object in JNDI Namespace 10 -13 12. Getting the JNDI Initial. Context 10 -14 13. Initial Context Factories 10 -16 14. lookup() Method 10 -17 15. Obtaining a Reference to a Local Resource 10 -18 16. Obtaining a Reference to a Remote Resource 10 -19 17. Setting JNDI Environment Properties 10 -20 18. Using RMI over HTTP Tunneling 10 -24 19. Using Environment References with JNDI 10 -25 20. Configuring Environment Variables 10 -26 21. Specifying an EJB Reference 10 -28 viii

Configuring EJB References 10 -29 Configuring Data Source References 10 -31 Summary 10 -33 Practice 10 -1: Overview 10 -34 11 Creating the Business Tier: Enterprise Java. Beans Objectives 11 -2 Enterprise Java. Beans (EJB) 11 -3 When to Use EJBs 11 -4 Types of EJBs 11 -5 Session Beans 11 -7 Entity Beans 11 -9 Message-Driven Beans 11 -10 EJB Architecture 11 -11 EJB Server 11 -12 EJB Container 11 -13 Services Provided by the EJB Container 11 -14 EJB Client 11 -16 EJB Interfaces and Classes 11 -17 Remote Interface and Remote Object 11 -18 Home Interface and Home Object 11 -19 Local Interface and Local Home Interface 11 -20 EJB Bean Class 11 -21 The EJB Deployment Process 11 -22 ejb-jar. xml File 11 -23 orion-ejb-jar. xml File 11 -24 Creating an EJB in JDeveloper 11 -25 Using the EJB Wizard 11 -26 Using the EJB Wizard 11 -27 Adding Methods to the Bean 11 -28 Deploying to Oracle Application Server 10 g from JDeveloper 11 -29 Summary 11 -30 Practice 11 -1: Overview 11 -31 ix

12 Implementing Business Tasks with Session EJBs Objectives 12 -2 Session Beans 12 -3 javax. ejb. Session. Bean Interface 12 -5 Types of Session Beans 12 -7 When to Use Session Beans 12 -9 Life Cycle of a Stateless Session Bean 12 -11 Home Interface for Stateless Session Beans 12 -12 Remote Interface for Stateless Session Beans 12 -14 The Session Bean Class 12 -15 The Session Bean Class: Business Methods 12 -17 Bean Class for the Stateless Session Bean 12 -18 Deployment Descriptor 12 -19 Client Application 12 -20 Client Application for Stateless Session Beans 12 -21 Life Cycle of a Stateful Session Bean 12 -25 Home Interface for Stateful Session Bean 12 -26 Client Application for Stateful Session Bean 12 -27 Summary 12 -28 Practices 12 -1 and 12 -2: Overview 12 -29 13 Managing Persistent Data in the Business Tier Objectives 13 -2 Entity Beans 13 -3 Representing Data in Entity Beans 13 -5 When to Use Entity Beans 13 -6 Callback Methods to Load and Store Data 13 -7 Session Beans Versus Entity Beans 13 -9 Types of Entity Beans 13 -11 BMP Beans Versus CMP Beans 13 -12 Components of an Entity Bean 13 -14 Creating, Removing, Finding, and Selecting Entity Beans 13 -15 Home Interface of an Entity Bean 13 -17 Creating a Bean Instance 13 -18 Finding an Entity Bean Instance 13 -20 Removing an Entity Bean 13 -22 Home Methods of Entity Beans 13 -23 Component Interfaces of an Entity Bean 13 -24 Primary Key Class of an Entity Bean 13 -25 Bean Class of an Entity Bean 13 -26 javax. ejb. Entity. Bean Interface 13 -28 Life Cycle of an Entity Bean 13 -30 x

Deployment Descriptor 13 -32 Summary 13 -35 Practice 13 -1: Overview 13 -36 14 Achieving State Management in the Business Tier Objectives 14 -2 Features of BMP Entity Beans 14 -3 Developing a BMP Entity Bean 14 -4 Features of CMP Entity Beans 14 -5 Implementing Methods in CMP Beans and BMP Beans 14 -7 Developing a CMP Entity Bean 14 -9 CMP Bean: Example 14 -10 Bean Class of a CMP EJB: CMP Fields 14 -11 Remote Interface: Departments 14 -12 Home Interface: Departments. Home 14 -13 Bean Class: Departments. Bean 14 -14 Deployment Descriptor ejb-jar. xml 14 -17 Mapping CMP Fields to Database Table Columns 14 -21 Default Mapping of CMP Fields to Database Table Columns 14 -22 Explicit Mapping of CMP Fields to Database Table Columns 14 -23 Client for Departments Bean 14 -25 Summary 14 -28 Practice 14 -1: Overview 14 -29 15 Container-Managed Relationships (CMRs) Objectives 15 -2 Relationships 15 -3 Implementing Relationships 15 -4 Cardinality and Direction of Relationships 15 -5 One-to-One Relationships 15 -7 One-to-Many Relationships 15 -8 Many-to-Many Relationships 15 -9 Oracle Top. Link 15 -10 Top. Link: Integration of J 2 EE Applications with Data Sources at Run Time 15 -11 Top. Link: Integrated with Oracle JDeveloper 10 g 15 -12 Implementing Relationships 15 -13 Defining Abstract Accessor Methods 15 -14 Accessor Methods in 1: 1 Relationships 15 -15 Accessor Methods in 1: M Relationships 15 -16 Checking Relationship Mappings in JDeveloper 15 -17 Accessor Methods in M: N Relationships 15 -18 xi

Implementing a Relationship in the Deployment Descriptor 15 -19 Implementing 1: 1 Relationships 15 -21 Implementing 1: M Relationships 15 -23 Implementing M: N Relationships 15 -25 Mapping Relationship Fields to Database 15 -27 Default Mapping of Relationship Fields 15 -28 Explicit Mapping of Relationship Fields 15 -30 Using JDeveloper to Create CMR Beans 15 -31 Summary 15 -32 Practice 15: Overview 16 Developing Message-Driven Beans Objectives 16 -2 Overview of Messaging Systems 16 -3 Types of Message Consumption 16 -4 Java Message Service (JMS) 16 -6 JMS Application Architecture 16 -7 Point-to-Point Model 16 -8 Publish-and-Subscribe Model 16 -9 Using JMS Interfaces 16 -10 JMS Message Structure 16 -12 Sending a Message to a Queue 16 -13 Receiving Messages 16 -15 Asynchronous Message Delivery 16 -16 Message-Driven Beans 16 -17 MDB Architecture 16 -18 Associating JMS Resources with an MDB 16 -19 State Diagram of an MDB 16 -20 Developing MDBs 16 -22 Interfaces to Be Implemented for MDBs 16 -23 Implementing an MDB Class 16 -24 Receiving Messages in an MDB Class 16 -25 Creating the Deployment Descriptor 16 -26 ejb-jar. xml: Example 16 -28 Mapping in OC 4 J-Specific Deployment Descriptor 16 -29 orion-ejb-jar. xml: Example 16 -30 Creating an MDB with JDeveloper 16 -31 Testing the MDB 16 -34 Summary 16 -35 xii

17 Integrating J 2 EE Components Objectives 17 -2 Overview 17 -3 Creating Remote Clients for EJBs 17 -4 Importing the EJB Home Interface 17 -5 Create a Reference to the EJB 17 -6 Passing Arguments to the EJB Method 17 -7 Creating an EJB Reference 17 -8 Creating Local Clients for EJBs 17 -9 ejb-local-ref Element 17 -10 EJB Tags 17 -11 use. Home Tag 17 -12 use. Bean Tag 17 -13 create. Bean Tag 17 -14 iterate Tag 17 -15 Using the EJB Tags 17 -16 Deploying an Application: Web Tier 17 -17 Deploying an Application: EJB Tier 17 -18 Deploying an Application: EAR File 17 -19 Deploying from Oracle Enterprise Manager 17 -20 Summary 17 -21 Practice 17 -1 and 17 -2: Overview 17 -22 18 Distributing Modular Applications: Introduction to Web Services Objectives 18 -2 What Is a Web Service? 18 -3 Web Service 18 -4 Service-Oriented Architecture 18 -6 Web Services Constituents 18 -7 Benefits of Web Services 18 -9 Web Services Model 18 -11 RPC-Style Web Services 18 -12 Document-Style Web Services 18 -13 Oracle Support for Web Services 18 -14 SOAP: XML Messaging for Web Services 18 -15 Communication with SOAP 18 -16 SOAP Messages 18 -17 Web Services Description Language (WSDL) 18 -19 WSDL 18 -20 UDDI Registry 18 -22 How UDDI Is Used 18 -24 Searching for a Web Service by Using UDDI 18 -25 xiii

UDDI Specification 18 -26 t. Model 18 -27 UDDI Support in Oracle JDeveloper 10 g 18 -31 UDDI Browsing with Oracle JDeveloper 10 g 18 -32 UDDI Publishing and Browsing with Oracle Enterprise Manager 18 -33 Summary 18 -34 Practice 18 -1: Overview 19 Distributing Modular Applications: Developing Web Services Objectives 19 -2 Oracle Application Server 10 g Web Services 19 -3 Developing a Web Service with a Stateless Java Class 19 -4 Defining an Interface 19 -5 Defining a Stateless Java Class 19 -7 Creating the Web Service 19 -10 Creating the Client Application 19 -11 Deploying the Web Service 19 -13 Testing the Web Service 19 -14 Web Service Home Page 19 -15 Testing the Deployed Web Service with Home Page 19 -16 Testing the say. Hello Operation 19 -17 Serializing and Encoding Parameters and Results 19 -19 Developing a Stored Procedure Web Service 19 -20 Generating Wrapper Classes Using JPublisher 19 -21 Exposing a Function as a Web Service by Using Oracle JDeveloper 10 g 19 -22 Publishing the Package as a Web Service 19 -23 JMS Web Services 19 -24 Summary 19 -26 Practice 19 -1: Overview 20 Implementing Security in J 2 EE Applications Objectives 20 -2 Goals of J 2 EE Security Architecture 20 -3 Overview of J 2 EE Security Architecture 20 -4 Java Authentication and Authorization Service (JAAS) 20 -5 Authorization of a Client 20 -8 JAAS Provider Types in OC 4 J 20 -9 Configuring Security 20 -10 Defining the Users, Groups, and Roles 20 -11 Managing Users and Groups with the JAZN Admintool 20 -13 Defining the Logical Roles 20 -15 xiv

Defining and Using Logical Roles in Web Applications (web. xml) 20 -16 Defining and Using Logical Roles in EJBs (ejb-jar. xml) 20 -18 Mapping Logical Roles to Users and Groups 20 -19 Programmatic Access to a Caller’s Security Context 20 -20 Client Authentication 20 -21 EJB Client Authentication with the jndi. properties file 20 -22 EJB Client Authentication with a Hashtable 20 -23 Setting Access Control with JDeveloper 20 -24 Creating Web Application Security Roles 20 -25 Web Application Login Authentication 20 -26 Web Application Authorization 20 -27 Creating EJB Security Roles 20 -28 Setting Method Permissions 20 -29 Method Access in EJB Deployment Descriptors 20 -30 Creating a Mapping for the Logical Roles 20 -31 Mapping JAZN Identities to a Logical Role 20 -32 Mapping Results in orion-ejb-jar. xml 20 -34 Accessing the EJB with New Permissions 20 -35 Summary 20 -36 Practice 20 -1: Overview 20 -37 21 Oracle Application Server 10 g Transaction Support Objectives 21 -2 What Is a Transaction? 21 -3 Enterprise Java. Beans (EJB) Support for Transactions 21 -4 EJB Transaction Model 21 -5 Demarcating Transactions 21 -6 Container-Managed Transactions 21 -7 CMT: Transaction Attributes 21 -8 Transaction Attribute: Not. Supported 21 -10 Transaction Attribute: Required 21 -11 Transaction Attribute: Supports 21 -12 Transaction Attribute: Requires. New 21 -13 Transaction Attribute: Mandatory 21 -14 Transaction Attribute: Never 21 -15 CMT: The set. Rollback. Only() Method 21 -16 JDeveloper: Setting Transaction Attributes 21 -17 Java Transaction API (JTA) 21 -19 JTA: The User. Transaction Interface 21 -20 Bean-Managed Transactions Demarcation 21 -21 BMT Demarcation: Process 21 -22 Using User. Transaction Support in EJBs 21 -23 Client-Demarcated Transactions Using User. Transaction 21 -24 BMT Demarcation: Restrictions 21 -25 xv

Local and Global Transactions 21 -26 Single-Phase Commit 21 -27 Data Source Revisited 21 -28 Default data-sources. xml 21 -29 Emulated Versus Nonemulated Data Sources 21 -30 Retrieve Connection to Data Source 21 -31 Global Transaction Resource Request Flow 21 -33 Resource Request Flow 21 -34 Enlisting Database Resources 21 -36 Summary 21 -38 A Practice Solutions B Schema Descriptions C Oracle JDeveloper 10 g Quick Reference D BMP Entity EJBs J 2 EE Connector Architecture xvi