Enterprise JavaBeans 3.0

Name: Enterprise JavaBeans 3.0
Brand: O'Reilly
Price: 32.49 EUR
Availability: OnlineOnly

Richard Monson-Haefel(Author)

O'Reilly (Publisher)

1st Edition

Published on 16. May 2006

768 pages

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978-0-596-55507-8 (ISBN)

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Content

Intro
Table of Contents
Foreword
Preface
Author's Note
Who Should Read This Book
How This Book Is Organized
Part I: The EJB 3.0 Standard
Part II: The JBoss Workbook
Software and Versions
Conventions Used in This Book
Using Code Examples
Safari® Enabled
Comments and Questions
Acknowledgments
Part I
Introduction
Server-Side Components
Enterprise JavaBeans Defined
Persistence and Entity Beans
Asynchronous Messaging
Java Message Service
Message-Driven Beans and JCA 1.5
Web Services
Titan Cruises: An Imaginary Business
What's Next?
Architectural Overview
The Entity Bean
The Entity Bean Class
XML Deployment Descriptors and JAR Files
The Enterprise Bean Component
Classes and Interfaces
Naming conventions
The remote interface
The bean class
What about message-driven beans?
Annotations, Deployment Descriptors, and JAR Files
The EJB Container
The proxy stub, EJB container, and bean instance
Using Enterprise and Entity Beans
Modeling Taskflow with Session Beans
Stateful and stateless session beans
Message-Driven Beans
The Bean-Container Contract
Summary
Resource Management and Primary Services
Resource Management
Instance Pooling
The stateless session bean life cycle
Message-driven beans and instance pooling
The Activation Mechanism
Java EE Connector Architecture
Java EE Connectors 1.5
Primary Services
Concurrency
Concurrency with session and entity beans
Concurrency with message-driven beans
Transactions
Persistence
Java Persistence
Object-to-relational persistence
Distributed Objects
Asynchronous Enterprise Messaging
EJB Timer Service
Naming
Security
Primary Services and Interoperability
IIOP
SOAP and WSDL
What's Next?
Developing Your First Beans
Developing an Entity Bean
Cabin: The Bean Class
The persistence.xml File
Developing a Session Bean
TravelAgentRemote: The Remote Interface
TravelAgentBean: The Bean Class
titan.jar: The JAR File
Creating a CABIN Table in the Database
Deploying the EJB JAR
Creating a Client Application
Creating a new Cabin entity
Persistence: EntityManager
Entities Are POJOs
Managed Versus Unmanaged Entities
Persistence Context
Transaction-scoped persistence context
Extended persistence context
Detached entities
Packaging a Persistence Unit
The Persistence Unit Class Set
Obtaining an EntityManager
EntityManagerFactory
Getting an EntityManagerFactory in Java SE
Getting an EntityManagerFactory in Java EE
Obtaining a Persistence Context
Interacting with an EntityManager
Persisting Entities
Finding Entities
find( ) and getReference( )
Queries
Updating Entities
Merging Entities
Removing Entities
refresh( )
contains( ) and clear( )
flush( ) and FlushModeType
Locking
getDelegate( )
Resource Local Transactions
Mapping Persistent Objects
The Programming Model
The Customer Bean
The Bean Class
XML Mapping File
Basic Relational Mapping
Elementary Schema Mappings
@Table
@Column
XML
Primary Keys
@Id
Table Generators
Sequence Generators
Primary-Key Classes and Composite Keys
@IdClass
@EmbeddedId
Property Mappings
@Transient
@Basic and FetchType
@Temporal
@Lob
@Enumerated
Multitable Mappings with @SecondaryTable
@Embedded Objects
Entity Relationships
The Seven Relationship Types
One-to-One Unidirectional Relationship
Relational database schema
Programming model
Primary-key join columns
One-to-one unidirectional XML mapping
Default relationship mapping
One-to-One Bidirectional Relationship
Relational database schema
One-to-one bidirectional XML mapping
Default relationship mapping
One-to-Many Unidirectional Relationship
Relational database schema
Programming model
One-to-many unidirectional XML mapping
Join table mapping
One-to-many unidirectional join table XML mapping
Default relationship mapping
The Cruise, Ship, and Reservation Entities
Many-to-One Unidirectional Relationship
Relational database schema
Programming model
Many-to-one unidirectional XML mapping
Default relationship mapping
One-to-Many Bidirectional Relationship
Relational database schema
Programming model
One-to-many bidirectional XML mapping
Default relationship mapping
Many-to-Many Bidirectional Relationship
Relational database schema
Programming model
Many-to-many bidirectional XML mapping
Default relationship mapping
Many-to-Many Unidirectional Relationship
Relational database schema
Programming model
Many-to-many unidirectional XML mapping
Default relationship mapping
Mapping Collection-Based Relationships
Ordered List-Based Relationship
List XML mapping
Map-Based Relationship
Map XML mapping
Detached Entities and FetchType
Cascading
PERSIST
MERGE
REMOVE
REFRESH
ALL
When to Use Cascading
Entity Inheritance
Single Table per Class Hierarchy
Advantages
Disadvantages
Table per Concrete Class
Advantages
Disadvantages
Table per Subclass
Advantages
Disadvantages
Mixing Strategies
Nonentity Base Classes
Queries and EJB QL
Query API
Parameters
Date Parameters
Paging Results
Hints
FlushMode
EJB QL
Abstract Schema Names
Simple Queries
Selecting Entity and Relationship Properties
Constructor Expressions
The IN Operator and INNER JOIN
LEFT JOIN
Fetch Joins
Using DISTINCT
The WHERE Clause and Literals
The WHERE Clause and Operator Precedence
The WHERE Clause and Arithmetic Operators
The WHERE Clause and Logical Operators
The WHERE Clause and Comparison Symbols
The WHERE Clause and Equality Semantics
The WHERE Clause and BETWEEN
The WHERE Clause and IN
The WHERE Clause and IS NULL
The WHERE Clause and IS EMPTY
The WHERE Clause and MEMBER OF
The WHERE Clause and LIKE
Functional Expressions
Functional expressions in the WHERE clause
Functions returning dates and times
Aggregate functions in the SELECT clause
The ORDER BY Clause
GROUP BY and HAVING
Subqueries
ALL, ANY, SOME
EXISTS
Bulk UPDATE and DELETE
Native Queries
Scalar Native Queries
Simple Entity Native Queries
Complex Native Queries
Native queries with multiple entities
Mixed scalar and entity results
Named Queries
Named Native Queries
Entity Callbacks and Listeners
Callback Events
Callbacks on Entity Classes
Entity Listeners
Default Entity Listeners
Inheritance and Listeners
Session Beans
The Stateless Session Bean
The ProcessPayment EJB
The database table: PAYMENT
The business interface: ProcessPayment
Entities as parameters
Domain objects: the CreditCardDO and CheckDO classes
An application exception: PaymentException
The bean class: ProcessPaymentBean
Accessing environment properties (injection)
The XML Deployment Descriptor
SessionContext
EJBContext
The Life Cycle of a Stateless Session Bean
The Does Not Exist State
The Method-Ready Pool
Transitioning to the Method-Ready Pool
Life in the Method-Ready Pool
Transitioning out of the Method-Ready Pool: the death of a stateless bean instance
The Stateful Session Bean
Getting Set Up for the TravelAgent EJB
The TravelAgent EJB
The remote interface: TravelAgent
Domain objects: the TicketDO class
Taking a peek at the client view
The bean class: TravelAgentBean
The bookPassage( ) method
The XML Deployment Descriptor
The Life Cycle of a Stateful Session Bean
The Does Not Exist State
The Method-Ready State
Transitioning into the Method-Ready state
Life in the Method-Ready state
Transitioning out of the Method-Ready state
The Passivated State
System exceptions
Stateful Session Beans and Extended Persistence Contexts
Nested Stateful Session Beans
Message-Driven Beans
JMS and Message-Driven Beans
JMS as a Resource
Reimplementing the TravelAgent EJB with JMS
ConnectionFactory and Topic
Connection and Session
MessageProducer
Message types
JMS Application Client
JMS Is Asynchronous
JMS Messaging Models
Publish-and-subscribe
Point-to-point
Which messaging model should you use?
Session Beans Should Not Receive Messages
Learning More About JMS
JMS-Based Message-Driven Beans
The ReservationProcessor EJB
The ReservationProcessorBean Class
MessageDrivenContext
MessageListener interface
Taskflow and integration for B2B: onMessage( )
Sending messages from a message-driven bean
@MessageDriven
@ActivationConfigProperty
Message selector
Acknowledge mode
Subscription durability
The XML Deployment Descriptor
The ReservationProcessor Clients
The reservation message producer
The ticket message consumer
The Life Cycle of a Message-Driven Bean
The Does Not Exist State
The Method-Ready Pool
Transitioning to the Method-Ready Pool
Life in the Method-Ready Pool
Transitioning out of the Method-Ready Pool: the death of an MDB instance
Connector-Based Message-Driven Beans
Message Linking
Timer Service
Titan's Maintenance Timer
Timer Service API
The TimerService Interface
Exceptions
The Timer
Canceling timers
Identifying timers
Retrieving other information from timers
The TimerHandle object
Exceptions
Transactions
Stateless Session Bean Timers
Message-Driven Bean Timers
Problems with the Timer Service
A very little bit about cron
Improving the Timer Service
Message-driven beans: standard configuration properties
Other problems with the Timer API
Final Words
The JNDI ENC and Injection
The JNDI ENC
What Can Be Registered in the JNDI ENC?
How Is the JNDI ENC Populated?
XML Population
Annotation Population
How Are Things Referenced from the ENC?
Using EJBContext
Annotation injection
Default ENC name
XML injection
XML overrides
Injection and inheritance
Reference and Injection Types
EJB References
@javax.ejb.EJB
XML-based remote EJB references
XML-based local EJB references
Ambiguous and overloaded EJB names
Resolving EJB references
EntityManagerFactory References
@javax.persistence.PersistenceUnit
XML-based EntityManagerFactory references
Scoped and overloaded unit names
EntityManager References
@javax.persistence.PersistenceContext
XML-based EntityManager references
Scoped and overloaded unit names
Resource References
@javax.annotation.Resource
Shareable resources
XML-based resource references
Resource Environment and Administered Objects
Environment Entries
Message Destination References
XML-based resource references
Using @Resource
Web Service References
XML-based resource references
Using @javax.xml.ws.WebServiceRef
Interceptors
Intercepting Methods
Interceptor Class
Applying Interceptors
Annotated methods and classes
Applying interceptors through XML
Default interceptors
Disabling interceptors
Interceptors and Injection
XML Injection
Intercepting Life Cycle Events
Custom Injection Annotations
Exception Handling
Aborting a Method Invocation
Catch and Rethrow Exceptions
Interceptor Life Cycle
Bean Class @AroundInvoke Methods
Future Interceptor Improvements
Annotations with Behavior
Feedback Welcome
Transactions
ACID Transactions
Is the TravelAgent EJB Atomic?
Is the TravelAgent EJB Consistent?
Is the TravelAgent EJB Isolated?
Is the TravelAgent EJB Durable?
Declarative Transaction Management
Transaction Scope
Transaction Attributes
Using the @TransactionAttribute annotation
Setting a transaction attribute within XML
Transaction attributes defined
EJB 3.0 persistence and transaction attributes
Message-driven beans and transaction attributes
EJB endpoints and transaction attributes
Transaction Propagation
Transactions and persistence context propagation
Isolation and Database Locking
Dirty, Repeatable, and Phantom Reads
Dirty reads
Repeatable reads
Phantom reads
Database Locks
Transaction Isolation Levels
Balancing Performance Against Consistency
Controlling isolation levels
Optimistic Locking
Programmatic Locking
Nontransactional EJBs
Explicit Transaction Management
Transaction Propagation in Bean-Managed Transactions
Message-driven beans and bean-managed transactions
Heuristic Decisions
UserTransaction
Status
EJBContext Rollback Methods
Exceptions and Transactions
Application Exceptions Versus System Exceptions
System exceptions
Application exceptions
Transactional Stateful Session Beans
The Transactional Method-Ready State
Transitioning into the Transactional Method-Ready state
Life in the Transactional Method-Ready state
Conversational Persistence Contexts
Security
Authentication and Identity
Authorization
Assigning Method Permissions
Identifying Specific Methods in XML
Wildcard declarations
Named method declarations
Specific method declarations
Remote/home/local differentiation
Excluded Methods
The RunAs Security Identity
Programmatic Security
EJB 3.0: Web Services Standards
Web Services Overview
XML Schema and XML Namespaces
XML Schema
XML Namespaces
SOAP 1.1
Web Services Styles
Exchanging SOAP Messages with HTTP
Now You See It, Now You Don't
WSDL 1.1
The &definitions& Element
The &portType& and &message& Elements
The &types& Element
The &binding& and &service& Elements
UDDI 2.0
From Standards to Implementation
EJB 3.0 and Web Services
Accessing Web Services with JAX-RPC
Generating JAX-RPC Artifacts from WSDL
Calling a Service from an EJB
The &service-ref& Deployment Element
The JAX-RPC Mapping File
Defining a Web Service with JAX-RPC
The WSDL Document
The Service Endpoint Interface
The Stateless Bean Class
The Deployment Files
The WSDL file
The JAX-RPC mapping file
The webservices.xml file
Using JAX-WS
The @WebService Annotation
The @WebMethod Annotation
The @SOAPBinding Annotation
The @WebParam Annotation
The @WebResult Annotation
The @OneWay Annotation
Separating the Web Services Contract
The Service Class
The Service Endpoint Interface
The @WebServiceRef Annotation
Other Annotations and APIs
Java EE
Servlets
JavaServer Pages
Web Components and EJB
Filling in the Gaps
Persistence Unit Scope
Java EE Application Client Components
Guaranteed Services
Fitting the Pieces Together
EJB Design in the Real World
Predesign: Containers and Databases
Container Capabilities
Database Capabilities
Design
Business Entity Identification
Technical Architecture
EJB and Entity Bean Identification
Identifying entity beans
Identifying session beans
Identifying message-driven beans
EJB Details
Stateless versus stateful session beans
Local versus remote interfaces
Entity Details
Returning entity data from EJBs
Minimizing database access
Caching
Combining queries
Minimizing updates
Fleshing Out the Design
Don't confuse EJB types
Minimize transaction scope
Exceptions
Identifying business exceptions
Designing the exception hierarchy
Deciding on rollback exceptions
Checked versus unchecked exceptions
Wrap subsystem exceptions
Utility Classes
Should You Use EJBs?
When to Use EJBs
When Not to Use EJBs
Alternatives to EJBs
Alternatives to Java Persistence
JDBC
Others
Wrapping Up
Part II
Introduction
Contents of the JBoss Workbook
Online Resources
JBoss Installation and Configuration
About JBoss
Installing the JBoss Application Server
Discovering the JBoss Directory Structure
JBoss Configuration Files
Deployment in JBoss
A Quick Look at JBoss Internals
Microkernel Architecture
Hot Deployment
Net Boot
Detached Invokers
Exercise Code Setup and Configuration
Exercise Directory Structure
Environment Setup
Exercises for Chap ter 4
Exercise 4.1: Your First Beans with JBoss
Start Up JBoss
Initialize the Database
Build and Deploy the Example Programs
Deconstructing build.xml
JBoss Specifics
Remote JNDI binding
persistence.xml
Examine and Run the Client Applications
Client.java
Viewing the Database
Exercise 4.2: JNDI Binding with Annotations
Start Up JBoss
Initialize the Database
Build and Deploy the Example Programs
Using @RemoteBinding
TravelAgentBean.java
Client.java
Run the client
Exercise 4.3: JNDI Binding with XML
Start Up JBoss
Initialize the Database
Build and Deploy the Example Programs
The jboss.xml Deployment Descriptor
jboss.xml
Client.java
Run the Client
Exercises for Chap ter 5
Exercise 5.1: Interacting with EntityManager
Start Up JBoss
Initialize the Database
Build and Deploy the Example Programs
Using find( ) and merge( )
TravelAgentBean.java
Run the client
Transaction Versus Extended Persistence Contexts
TransactionPersistenceContextBean.java
Client_2.java
Run the client
FlushModeType Behavior
TravelAgentBean.java
Run the client
Exercise 5.2: Standalone Persistence
build.xml
Initialize the Database
Build the Example Program
Examine the JAR
persistence.xml
Examine the Standalone Application
Exercises for Chap ter 6
Exercise 6.1: Basic Property Mappings
Start Up JBoss
Initialize the Database
Build and Deploy the Example Programs
Examine the Customer Entity
Customer.java
Examine TravelAgentBean
TravelAgentBean.java
Examine the Client
Run the Client
Exercise 6.2: @IdClass
Start Up JBoss
Initialize the Database
Build and Deploy the Example Programs
Examine the Example Files
Run the Client
Exercise 6.3: @EmbeddedId
Start Up JBoss
Initialize the Database
Build and Deploy the Example Programs
Examine the Customer Entity
Customer.java
Examine Other Files
Run the Client
Exercise 6.4: Multitable Mappings
Start Up JBoss
Initialize the Database
Build and Deploy the Example Programs
Examine the Customer Entity
Customer.java
Examine Other Files
Run the Client
Exercise 6.5: Embeddable Classes
Start Up JBoss
Initialize the Database
Build and Deploy the Example Programs
Examine the Customer Entity
Examine Other Files
Run the Client
Exercises for Chap ter 7
Exercise 7.1: Cascading
Start Up JBoss
Initialize the Database
Build the Example Programs
Examine the Entities
Examine Client1
Client1.java
createCustomerAddress( )
cascadeMergeAddress( )
cascadeRemoveAddress( )
Run Client1
Examine Client2
Client2.java
Run Client2
Exercise 7.2: Inverse Relationships
Start Up JBoss
Initialize the Database
Build the Example Programs
Examine the Entities
Examine Client1
Client1.java
Run Client1
Exercise 7.3: Lazy Initialization
Start Up JBoss
Build and Deploy the Example Programs
Initialize the Database
Examine the DataAccess EJB
DataAccessBean.java
Examine the Client
Client.java
Run the Client
Exercises for Chap ter 8
Exercise 8.1: Single Table per Hierarchy
Start Up JBoss
Initialize the Database
Build and Deploy the Example Programs
Examine the Database Schema
Examine the Code
DataAccessBean.java
Client.java
Run the Client
Exercise 8.2: Single Table per Hierarchy
Start Up JBoss
Initialize the Database
Build and Deploy the Example Programs
Examine the Database Schema
Examine the Code
Run the Client
Exercise 8.3: JOINED Inheritance Strategy
Start Up JBoss
Initialize the Database
Build and Deploy the Example Programs
Examine the Database Schema
Examine the Code
Run the Client
Exercises for Chap ter 9
Exercise 9.1: Query and EJB QL Basics
Initialize the Database
Build the Example Programs
Example Basics
Parameters and Paging
Run the example
The SELECT Clause
columnResultSet( )
nestedRelationshipPropertyResultSet( )
constructorExpression( )
Run the example
The IN Operator and INNER JOIN
Run the example
LEFT JOIN
Run the example
Fetch Joins
noJoin( )
joinFetch( )
Run the example
Using DISTINCT
Run the example
The WHERE Clause and Literals
Run the example
The WHERE Clause and BETWEEN
Run the example
The WHERE Clause and IN
Run the example
The WHERE Clause and IS NULL
Run the example
The WHERE Clause and IS EMPTY
Run the example
The WHERE Clause and MEMBER OF
Run the example
The WHERE Clause and LIKE
Run the example
Run the example
Aggregate Functions
Run the example
The ORDER BY Clause
Run the example
GROUP BY and HAVING
Run the example
Subqueries
Run the example
Exercise 9.2: Native SQL Queries
Initialize the Database
Build the Example Program
Examine the Example
nativeSql( )
nativeWithMultipleEntities( )
mixedNative( )
Run the Example
Exercises for Chap ter 10
Exercise 10.1: Entity Callbacks
Start Up JBoss
Initialize the Database
Build and Deploy the Example Programs
Examine the Customer Entity
Customer.java
Examine TravelAgentBean
TravelAgentBean.java
Examine the Client
Run the Client
Exercise 10.2: Entity Listeners
Start Up JBoss
Initialize the Database
Build and Deploy the Example Programs
Examine the Entity Listener
Examine the JMX MBean
EntityStats.java
EntityStatsMBean.java
jboss-service.xml
Examine the Customer Entity
Run the Client
Examine the JMX Management Console
Exercises for Chap ter 11
Exercise 11.1: Stateless Session Bean
Start Up JBoss
Initialize the Database
Build and Deploy the Example Programs
Examine ProcessPaymentBean
Examine DataAccessBean
Examine the Client
Run the Client Application
Exercise 11.2: XML Override
Start Up JBoss
Initialize the Database
Build and Deploy the Example Programs
Examine ProcessPaymentBean
ejb-jar.xml
Examine the Client
Run the Client Application
Exercise 11.3: Annotationless Stateless Session Bean
Start Up JBoss
Initialize the Database
Build and Deploy the Example Programs
Run the Client
Exercise 11.4: Stateful Session Bean
Start Up JBoss
Initialize the Database
Build and Deploy the Example Programs
Examine ProcessPaymentBean and TravelAgentBean
Examine DataAccessBean
Examine the Client
Run the Application
Exercise 11.5: Annotationless Stateful Session Bean
Start Up JBoss
Initialize the Database
Build and Deploy the Example Programs
Run the Application
Exercises for Chap ter 12
Exercise 12.1: The Message-Driven Bean
Start Up JBoss
Initialize the Database
Create a New JMS Queue
Adding a JMS queue through a configuration file
jbossmq-titanqueues-service.xml
Build and Deploy the Example Programs
Examine ProcessPaymentBean and DataAccessBean
Examine the Client Applications
JmsClient_ReservationProducer.java
JmsClient_TicketConsumer.java
Examine ReservationProcessorBean
Run the Client Applications
Exercises for Chap ter 13
Exercise 13.1: EJB Timer Service
Start Up JBoss
Initialize the Database
Build and Deploy the Example Programs
Examine ShipMaintenanceBean
Examine the Client
Run the Application
Exercises for Chap ter 15
Exercise 15.1: EJB Interceptors
Start Up JBoss
Initialize the Database
Build and Deploy the Example Programs
Examine the Code
Run the Application
Exercise 15.2: Intercepting EJB Callbacks
Start Up JBoss
Initialize the Database
Build and Deploy the Example Programs
Examine the Code
Run the Client
Exercises for Chap ter 16
Exercise 16.1: Conversational Persistence Contexts
Start Up JBoss
Initialize the Database
Build and Deploy the Example Programs
Examine the Server Code
Examine the Client
Run the Application
Exercises for Chap ter 17
Exercise 17.1: Security
Configure JBoss Security
users-titan.properties
roles-titan.properties
Start Up JBoss
Initialize the Database
Build and Deploy the Example Programs
Examine the ProcessPaymentBean Class
Examine the Client
Run the Application
Exercise 17.2: Securing Through XML
Configure JBoss Security
Start Up JBoss
Initialize the Database
Build and Deploy the Example Programs
Examine the JBoss Configuration Files
Run the Application
Exercises for Chap ter 19
Exercise 19.1: Exposing a Stateless Bean
Start Up JBoss
Initialize the Database
Build and Deploy the Example Programs
Examining TravelAgentBean
Examining the Generated WSDL
Examining the Client
The Java EE Application Client Deployment Descriptor
The JBoss Application Client Deployment Descriptor
Examining the Service Endpoint Interface
Examining the JAX-RPC Mapping File
Running the Client
Viewing the Database
Exercise 19.2: Using a .NET Client
Installing the Necessary Software
Windows
Unix
Start Up JBoss
Initialize the Database
Build and Deploy the Titan JAR
Examine the Client
Compile the Client
Windows
Unix
Run the Client
Part III
JBoss Database Configuration
Set Up the Database
Basic Setup
titandb-ds.xml
Examine the persistence.xml File
persistence.xml
Start Up JBoss
Build and Deploy the Example Programs
Examine and Run the Client Applications
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Enterprise JavaBeans 3.0

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