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Provided by: Software Training Academy, Inc Introduction to EJB |
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This course introduces the experienced Java developer to Enterprise JavaBeans -- the Java EE standard for scalable, secure, and transactional Java components. EJB 3.0 has reinvigorated this area of Java enterprise development, with dramatic improvements in ease of use and smooth integration with servlet-based or JSF web applications. This course treats the 3.0 specification, with a few notes on 2.1 compatibility but an emphasis on doing things the 3.0 way.
Students get an overview of the EJB rationale and architecture, and then dive right into creating session beans and entities. The new dependency-injection features of EJB3 cause perhaps the most confusion, so we work through a chapter devoted explicitly to DI and JNDI, and basically how components find each other to make an application. We then study entities and the Java Persistence API more deeply, and get a look at message-driven beans as well.
LEARNING OBJECTIVES
Understand the role of EJB in the broader Java EE platform.
Describe the features that are implemented by an EJB container on behalf of application components.
Build stateless session beans as part of a service layer or SOA.
Build JPA entities to represent persistent data records within the Java application.
Develop systems of entities to manage complex data models including 1:1, 1:N, and N:N associations.
Manage transactional behavior of the application through declarative and programmatic techniques.
Invoke EJB sessions from Java web applications.
Use dependency injection and JNDI names to assemble complex web/EJB systems with minimal fuss and maximal flexibility.
Implement message-driven beans to process queued messages asynchronously.
Course Duration: 2 days.
Prerequisites:
Solid Java programming skills and understanding of OO Java and Java-5.0 language features is essential. Course 103 is excellent preparation for this course.
Experience with developing Java web applications is very helpful for this course, but not strictly required. Course 115 on JavaServer Faces makes an excellent one-week pairing with this course.
Some knowledge of XML will be useful for writing the occasional deployment descriptor, but is not required. Course 501 is recommended for those who would like to get more familiar with XML before pursuing this course.
Students get an overview of the EJB rationale and architecture, and then dive right into creating session beans and entities. The new dependency-injection features of EJB3 cause perhaps the most confusion, so we work through a chapter devoted explicitly to DI and JNDI, and basically how components find each other to make an application. We then study entities and the Java Persistence API more deeply, and get a look at message-driven beans as well.
LEARNING OBJECTIVES
Understand the role of EJB in the broader Java EE platform.
Describe the features that are implemented by an EJB container on behalf of application components.
Build stateless session beans as part of a service layer or SOA.
Build JPA entities to represent persistent data records within the Java application.
Develop systems of entities to manage complex data models including 1:1, 1:N, and N:N associations.
Manage transactional behavior of the application through declarative and programmatic techniques.
Invoke EJB sessions from Java web applications.
Use dependency injection and JNDI names to assemble complex web/EJB systems with minimal fuss and maximal flexibility.
Implement message-driven beans to process queued messages asynchronously.
Course Duration: 2 days.
Prerequisites:
Solid Java programming skills and understanding of OO Java and Java-5.0 language features is essential. Course 103 is excellent preparation for this course.
Experience with developing Java web applications is very helpful for this course, but not strictly required. Course 115 on JavaServer Faces makes an excellent one-week pairing with this course.
Some knowledge of XML will be useful for writing the occasional deployment descriptor, but is not required. Course 501 is recommended for those who would like to get more familiar with XML before pursuing this course.
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Training
Provided by Software Training Academy, Inc
Introduction to EJB
1. Overview
Enterprise Applications
Containers and Objects
Three Containers
Remote Connectivity
Scalability and Availability
Security
Transaction Control
2. Architecture
What is an EJB?
Types of Beans
Inversion of Control
The Bean-Type Annotations
Dependency Injection
The EJB Annotation
Development Cycle and Roles
3. Session Beans
Interface/Implementation Split
Stateful vs. Stateless
The Stateless Annotation
Lifecycle and State Transitions
Session Context
The Stateful Annotation
State Transitions
Singletons and Pools
4. Entities
The Java Persistence API
Persistence Annotations
Configuration by Exception
ORM Annotations
The EntityManager
Acquiring and Using the EntityManager
persistence.xml
Enumerated and Temporal Types
5. Associations
Associations, Cardinality, and Ownership
Annotations
Unidirectional vs. Bidirectional
The Embedded Annotation
6. Java Persistence Query Language
OO Query Languages
The FROM Clause and Directionality
The WHERE Clause
The SELECT Clause
Joins
Aggregates and Grouping
Ordering
7. Dependency Injection
Interdependent Systems
The Factory Pattern
The Service Locator Pattern
Dependency Injection
Injection by Magic?
Injection by Type
Injection by Name
The Component Environment
Deployment Descriptors
Impact on Stateful Session Beans
JNDI
Connecting to a Remote Bean
Using mappedName
Who Can Declare Dependencies
8. Message-Driven Beans (Optional)
Asynchronous Messaging
The Java Message Service
Message-Driven Beans
Message Types
Injecting JMS Queues
Appendix A. Learning Resources
Appendix B. Quick Reference: Java EE Annotations
System Requirements
Hardware minimal: 1 GHz, 512 meg RAM, 1 gig disk space
Hardware recommended: 2 GHz, 1 gig RAM, 1 gig disk space
Operating system: Tested on Windows XP Professional.
Software: All free downloadable tools.
Enterprise Applications
Containers and Objects
Three Containers
Remote Connectivity
Scalability and Availability
Security
Transaction Control
2. Architecture
What is an EJB?
Types of Beans
Inversion of Control
The Bean-Type Annotations
Dependency Injection
The EJB Annotation
Development Cycle and Roles
3. Session Beans
Interface/Implementation Split
Stateful vs. Stateless
The Stateless Annotation
Lifecycle and State Transitions
Session Context
The Stateful Annotation
State Transitions
Singletons and Pools
4. Entities
The Java Persistence API
Persistence Annotations
Configuration by Exception
ORM Annotations
The EntityManager
Acquiring and Using the EntityManager
persistence.xml
Enumerated and Temporal Types
5. Associations
Associations, Cardinality, and Ownership
Annotations
Unidirectional vs. Bidirectional
The Embedded Annotation
6. Java Persistence Query Language
OO Query Languages
The FROM Clause and Directionality
The WHERE Clause
The SELECT Clause
Joins
Aggregates and Grouping
Ordering
7. Dependency Injection
Interdependent Systems
The Factory Pattern
The Service Locator Pattern
Dependency Injection
Injection by Magic?
Injection by Type
Injection by Name
The Component Environment
Deployment Descriptors
Impact on Stateful Session Beans
JNDI
Connecting to a Remote Bean
Using mappedName
Who Can Declare Dependencies
8. Message-Driven Beans (Optional)
Asynchronous Messaging
The Java Message Service
Message-Driven Beans
Message Types
Injecting JMS Queues
Appendix A. Learning Resources
Appendix B. Quick Reference: Java EE Annotations
System Requirements
Hardware minimal: 1 GHz, 512 meg RAM, 1 gig disk space
Hardware recommended: 2 GHz, 1 gig RAM, 1 gig disk space
Operating system: Tested on Windows XP Professional.
Software: All free downloadable tools.
About The Training Provider: Software Training Academy, Inc
Software Training Academy, Inc - Software Training Academy is company based in Seattle, WA (USA) and Toronto, ON (Canada) and it offers highly customized IT Training.
Our portfolio includes Java, .NET, Web Development (PHP, Ruby on Rails, etc), Databases (Oracle, SQL Server, MySQL, DB2, etc) and Advanced courses for Microsoft Office.
We deliver courses either onsite or in class throughout North America and Europe, and...
