Java EE 7's JSF 2.2, Interceptors 1.2, and JPA 2.1 Intro Videos

Java EE 7 Launch Webinar sessions.

Here's the JSF 2.2 session:


Here's the Interceptors 1.1 session:


Here's the JPA 2.1 session:

Source

EJB transactions: going deeper

In below article the autor explains in some words how works EJB technology, particularly about EJB transaction management
Full article

@Stateless  
public class MyFirstEjbBean implements MyFirstEjb {  
  
  @EJB  
  private MySecondEjb other;  
  
  public void firstEjb(){  
  
    other.secondEjb();  
  }  
}  
  
  
@Stateless  
public class MySecondEjbBean implements MySecondEjb {  
  
  public void secondEjb(){  
  
  }  
} 

Hibernate - Callback methods

Callbacks Methods: It is often useful for the application to react to certain events that occur inside the persistence mechanism.

Type	Description
@PrePersist	Executed before the entity manager persist operation is actually executed or cascaded. This call is synchronous with the persist operation.
@PreRemove	Executed before the entity manager remove operation is actually executed or cascaded. This call is synchronous with the remove operation.
@PostPersist	Executed after the entity manager persist operation is actually executed or cascaded. This call is invoked after the database INSERT is executed.
@PostRemove	Executed after the entity manager remove operation is actually executed or cascaded. This call is synchronous with the remove operation.
@PreUpdate	Executed before the database UPDATE operation.
@PostUpdate	Executed after the database UPDATE operation.
@PostLoad	Executed after an entity has been loaded into the current persistence context or an entity has been refreshed.

Example

@Entity
@EntityListeners(class=Audit.class)
public class Cat {
    @Id private Integer id;
    private String name;
    private Calendar dateOfBirth;
    @Transient private int age;
    private Date lastUpdate;
    //getters and setters

    /**
     * Set my transient property at load time based on a calculation,
     * note that a native Hibernate formula mapping is better for this purpose.
     */
    @PostLoad
    public void calculateAge() {
        Calendar birth = new GregorianCalendar();
        birth.setTime(dateOfBirth);
        Calendar now = new GregorianCalendar();
        now.setTime( new Date() );
        int adjust = 0;
        if ( now.get(Calendar.DAY_OF_YEAR) - birth.get(Calendar.DAY_OF_YEAR) < 0) {
            adjust = -1;
        }
        age = now.get(Calendar.YEAR) - birth.get(Calendar.YEAR) + adjust;
    }
}

public class LastUpdateListener {
    /**
     * automatic property set before any database persistence
     */
    @PreUpdate
    @PrePersist
    public void setLastUpdate(Cat o) {
        o.setLastUpdate( new Date() );
    }
}

Source

Java EE 7 is final

Here is what EE 7 looks like as of today

The complete specification now contains 34 individual specifications.

Specification	JSR	Version	Java.net Project
Java Platform, Enterprise Edition	342	7	javaee-spec
Managed Beans	342	1.0
Java EE Web Profile (Web Profile)	342	1.0
Java API for RESTful Web Services (JAX-RS)	339	2.0	jax-rs-spec
Web Services for Java EE	109	1.4
Java API for XML-Based Web Services (JAX-WS)	224	2.2	jax-ws
Java Architecture for XML Binding (JAXB)	222	2.2	jaxb
Web Services Metadata for the Java Platform	181	2.1
Java API for XML-Based RPC (JAX-RPC) (Optional)	101	1.1	jax-rpc
Java API for XML Registries (JAXR) (Optional)	93	1.0
Servlet	340	3.1
JavaServer Faces(JSF)	344	2.2	javaserverfaces
JavaServer Pages (JSP)	245	2.3
JavaServer Pages Expression Language (EL)	341	3.0	el-spec
A Standard Tag Library for JavaServer Pages (JSTL)	52	1.2	jstl
Debugging Support for Other Languages	45	1.0
Contexts and Dependency Injection for the Java EE Platform (CDI)	346	1.1	github.com
Dependency Injection for Java (DI)	330	1.0
Bean Validation	349	1.1	http://beanvalidation.org
Enterprise JavaBeans (EJB)	345	3.2	ejb-spec
Java EE Connector Architecture (JCA)	322	1.7
Java Persistence (JPA)	338	2.1	jpa-spec
Common Annotations for the Java Platform	250	1.2
Java Message Service API (JMS)	343	2.0
Java Transaction API (JTA)	907	1.2	jta-spec
JavaMail	919	1.5	javamail
Java Authentication Service Provider Interface for Containers (JASPIC)	196	1.1	jaspic-spec
Java Authorization Contract for Containers (JACC)	115	1.5	jacc-spec
Java EE Application Deployment (Optional)	88	1.2
Java Database Connectivity (JDBC)	221	4.0
Java Management Extensions (JMX)	255	2.0	openjdk
JavaBeans Activation Framework (JAF)	925	1.1
Streaming API for XML (StAX)	173	1.0	sjsxp
Java Authentication and Authorization Service (JAAS)		1.0
Interceptors	318	1.2
Batch Applications for the Java Platform	352	1.0	jbatch
Java API for JSON Processing	353	1.0	json-processing-spec
Java API for WebSocket	356	1.0	websocket-spec
Concurrency Utilities for Java EE	236	1.0	concurrency-ee-spec

Source

Setup of Dynamic Web Project using Maven

Good article that show how to create a Dynamic Web Project using Maven.

Full article here.

In same blog i found other interesting article about
Spring JPA Data + Hibernate + MySQL + MAVEN that show how we can develop a web-applications with the help of Spring MVC.