There is agreement in the Java community that EJBs often introduce more problems than they solve. Now there is a major trend toward lightweight technologies such as Hibernate, Spring, JDO, iBATIS, and others, all of which allow the developer to work directly with the simpler Plain Old Java Objects, or POJOs. Bowing to the new consensus, EJB 3 now also works with POJOs.

POJOs in Action describes these new, simpler, and faster ways to develop enterprise Java applications. It shows you how to go about making key design decisions, including how to organize and encapsulate the domain logic, access the database, manage transactions, and handle database concurrency.

Written for developers and designers, this is a new-generation Java applications guide. It helps you build lightweight applications that are easier to build, test, and maintain. The book is uniquely practical with design alternatives illustrated through numerous code examples.

What's Inside

• Leverage the frameworks' strengths, avoid their weaknesses
• Apply enterprise patterns in the lightweight world
• New patterns like POJO Façade and Exposed Domain Model
• Build rich domain models
• How Aspects improve design
• Lightweight testing strategies
• How to be agile

• Overview of POJOs and lightweight
  • Developing with POJOs: faster and easier
  • J2EE design decisions
• A simpler, faster Approach
  • Using the Domain Model pattern
  • Overview of persisting a domain model
  • Persisting a domain model with JDO 2.0
  • Persisting a domain model with Hibernate 3
  • Encapsulating the business logic with a POJO fagade
• Variations
  • Using an exposed domain model
  • Using the Transaction Script pattern
  • Implementing POJOs with EJB 3
• Dealing with databases and concurrency
  • Implementing dynamic paged queries
  • Database transactions and concurrency
  • Using offline locking patterns