- EJB 3.1 Cookbook
- EJB 3.1 Cookbook
- Credits
- About the Author
- About the Reviewers
- www.PacktPub.com
- Preface
- 1. Getting Started With EJBs
- Introduction
- Creating a simple session EJB
- Accessing a session bean using dependency injection
- Accessing the session bean using JNDI
- Creating a simple message-driven bean
- Sending a message to a message-driven bean
- Accessing an EJB from a web service (JAX-WS)
- Accessing an EJB from a web service (JAX-RS)
- Accessing an EJB from an Applet
- Accessing an EJB from JSP
- Calling an EJB from JSF
- Accessing an EJB from a Java Application using JNDI
- Accessing an EJB from a Java Application using an embeddable container
- Accessing the EJB container
- 2. Session Beans
- Introduction
- Creating a stateless session bean
- Creating a stateful session bean
- Creating a singleton bean
- Using multiple singleton beans
- Using container managed concurrency
- Using bean managed concurrency
- Controlling the initialization process
- Using session beans with more than one business interface
- Understanding parameter behavior and granularity
- Using an asynchronous method to create a background process
- 3. Message-Driven Beans
- Introduction
- Handling a string-based message
- Handling a byte-based message
- Handling a stream-based message
- Handling a map-based message
- Handling an object-based message
- Using an MDB in a point-to-point application
- Using MDB in a publish-and-subscribe application
- Specifying which types of message to receive using the message selector
- Browsing messages in a message queue
- 4. EJB Persistence
- Introduction
- Creating an entity
- Creating an entity facade
- Using the EntityManager
- Controlling the Object-Relationship Mapping (ORM) process
- Using embeddable classes in entities
- Using application-managed persistence
- Validating persistent fields and properties
- Validating null fields
- Validating string fields
- Validating temporal fields
- Validating using regular expressions
- Validating Boolean fields
- Validating Integer fields
- Using the Validator class
- 5. Querying Entities using JPQL and the Criteria API
- 6. Transaction Processing
- Introduction
- Creating the Demonstration classes
- Handling transactions the easy way
- Using the SessionSynchronization interface with session beans
- Understanding how the TransactionAttributeType affects transactions
- Handling transactions manually
- Rolling back a transaction
- Handling errors in a transaction
- Using timeouts with transactions
- 7. EJB Security
- 8. Interceptors
- Introduction
- Creating the Registration Application
- Defining and using interceptors
- Using the InvocationContext to verify parameters
- Using interceptors to enforce security
- Using interceptors to handle transactions
- Using interceptors to handle application statistics
- Using lifecycle methods in interceptors
- 9. Timer Services
- Introduction
- Setting up the ReportsApplication
- Creating and using declarative timers
- Creating and using programmatic timers
- Understanding calendar-based scheduling
- Using the timer interface
- Using persistent and non-persistent timers
- Creating timers upon application deployment
- Using interceptors with timers
- 10. Web Services
- 11. Packaging the EJB
- Introduction
- Understanding an application's JAR files using the jar command
- Understanding class loading
- Using deployment descriptors for interceptors
- Using deployment descriptors for timer interceptors
- Using deployment descriptor for default interceptors
- Using deployment descriptors for callback interceptors
- Using a deployment descriptors for transactions
- Using deployment descriptors for security
- 12. EJB Techniques
Integers are widely used in most applications. When these variables are persisted, it is useful to be able to limit their values to a specific range. The @Min and @Max annotations are used for this purpose.
We will use the LicenseBean and LicenseBeanFacade classes from the ValidationApplication as discussed in the Validating persistent fields and properties recipe.
The size of an integer field can also be validated using the @Min and @Max annotations. The monthsToExpire field in the following declaration must have a value between 12 and 48 inclusive to avoid a constraint violation.
@Min(12) @Max(48) private int monthsToExpire;
The @Min or @Max annotations can be used without the other one. In such situations, there is no lower or upper bound depending on which annotation is not used.
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