Ludovic Champenois's complete blog can be found at: http://weblogs.java.net/blog/ludo/
Bonjour, Comment Java?
This coming Thursday(08/27/09) 'll be at GooglePlex (Mountain View) for an Eclipse Day...The entire genda is at http://wiki.eclipse.org/Eclipse_Day_At_Googleplex_2009.
2 presos seem to be very interesting so far:
and possibly others...The Google crowd is impressive.
There is a waiting list for people who did not register in time:-) But I am sure online videos of the conference will be available as well.
Ludo (Testing the new Java.net Blog system)
Bonjour Comment Java?
today is some type of historical milestone for Java EE 6: This is
Milestone 1 of NetBeans 6.8 and Java EE 6 support with the latest
GlassFish v3 (build 57). The bundle is only 132Mb and contains
everything you need to start with Java EE 6: the IDE, the Java EE 6
current runtime, the JavaEE 6 JavaDocs (for code completion), the
JavaDB database, and very very cool features from the plaform or its
implementation:
And more and more (i.e all the NetBeans 6.7.x features as well).
Read more at http://wiki.netbeans.org/NewAndNoteworthyNB68
and get the Milestone 1 bits at
Ludo
Bonjour, comment Java?
I'm preparing some Java EE 6 JavaOne demos. While doing that, I was thinking: how can I compress most of the Java EE 6 technology inside *one* single Java Class?
If you are my manager, stop reading now...
If you believe you are an architect, stop reading now...
If you are a member of the Java Blueprints team, stop reading now...
If you are a regular java blog reader, stop reading now...
The following code is PG 40. Talk to you parents if you are less than 40.
Still reading? Not sure why, but here we go.
The following Java EE 6 compliant Application is a Web Application with just 2 source files: MonsterServlet.java and persistence.xml.
It demonstrates the following Java EE 6 features:
Are you still reading? Remember the 3 tier architecture, with Data Layer, Business Layer, then Presentation Layer? Well forget it for this monster application which merges all the layers into one single Java Class, which is a Servlet, an EJB and a Entity JPA bean validated with some Bean Validation annotations...
| MonsterServlet.java |
package monster;
import java.io.*;
import java.util.*;
import javax.ejb.*;
import javax.servlet.annotation.*;
import javax.servlet.http.*;
import javax.naming.*;
import javax.persistence.*;
import javax.servlet.*;
import javax.validation.*;
import javax.validation.constraints.*;
/**
* @author: Not Me!!!
**/
@Stateless @Entity @WebServlet(urlPatterns = "/monster")
@Table(name = "MONSTERTABLE")
@NamedQueries({@NamedQuery(name = "MonsterEJB.findAll", query = "SELECT c FROM MonsterServlet c")})
@PersistenceContext(name = "monsterContext", unitName = "MonsterWebAppPU")
public class MonsterServlet extends HttpServlet {
@Id @GeneratedValue(strategy = GenerationType.SEQUENCE) private int monsterId;
@Max(2) @NotNull private String name;
@Transient @EJB MonsterServlet monsterEJB;
/*@Transient @PersistenceUnit(unitName = "MonsterWebAppPU") //does not work see EclipeLink bug
private EntityManagerFactory emf;*/ //https://bugs.eclipse.org/bugs/show_bug.cgi?id=277550
@Override
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.getWriter().println("In Servlet calling the EJB side " + monsterEJB.EJBBusinessMethod("" + this));
}
public String EJBBusinessMethod(String name) {
try {
InitialContext ic = new InitialContext();
EntityManager em = (EntityManager) ic.lookup("java:comp/env/monsterContext");
this.name = name;
em.persist(this);
Query allMonsterQuery = em.createNamedQuery("MonsterEJB.findAll");
List allMonsters = allMonsterQuery.getResultList();
String error = validateTheMonsterJPA((MonsterServlet) allMonsters.get(0));
return "BusinessMethod from EJB" + allMonsters.toString() + error;
} catch (NamingException ex) {
return "Error in EJBBusinessMethod "+ex.getMessage();
}
}
private String validateTheMonsterJPA(MonsterServlet m) {
String error=" ";
ValidatorFactory factory = Validation.buildDefaultValidatorFactory();
Validator validator = factory.getValidator();
Set> s = validator.validate(m);
for (ConstraintViolation c : s) {
error = error+ " Contraint Violation: " + c.getMessage());
}
return error;
}
}
And the persistence.xml to put in the WEB-INF/classes/META-INF directory of this Web Application
xml version="1.0" encoding="UTF-8"?>
version="1.0" xmlns="http://java.sun.com/xml/ns/persistence"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation=
"http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd"
name="MonsterWebAppPU" transaction-type="JTA">
>jdbc/__default >
rties>
name="eclipselink.ddl-generation" value="drop-and-create-tables"/>
>
>
sistence>
This Web Application can be deployed as it to the latest builds of GlassFish v3. The page output is something like:
In Servlet calling the EJB side BusinessMethod from EJB[monster.MonsterServlet@5718c3a7] Contraint Violation: must be less than or equal to 2
Now the quiz:
Still reading? Now I have just corrupted your brain: while not recommended, it is possible to write a 3-tier Java EE 6 Application with Servlets, EJBs, JPAs, Beans Validation in one single Java class and one single xml file...
Can't wait for Java EE 7 when persistence.xml will become optional:-)
See you at JavaOne. You can now forget this blog. Someone had to write it. It's over now:-)
Ludo
Bonjour Comment Java?
Finally the GlassFish Tools bundle for Eclipse has been released: version 1.0 is available at http://download.java.net/glassfish/eclipse
The Tools bundle contains:
|
 |
Installers are available for Windows and MacOSX, and tar.gz for Linux systems.
If you have used a preview release (pre version 1.0), make sure to read the release notes http://download.java.net/glassfish/eclipse/releasenotes.html for information about a known issue regarding reusing workspaces created with preview releases. Commercial support for this bundle is also available at http://developers.sun.com/services/buying_guide.jsp.
I like the fact that the GlassFish servers are preconfigured, ready to use, even with a sample Java DB database pre registered (to use the JPA entities tooling). By default the "Deploy On Save" feature is enabled for GlassFish v3 Prelude: it means that the moment you save a Servlet, a utility class, or even an EJB, the application is automatically updated and redeployed to the running server in an optimal way. If you want to play with leading edge bits for GlassFish v3 Java EE 6, you can even register and download from the bundle a promoted build (happens every week) of the latest GlassFish v3 server. We will demo more about that at the JavaOne conference.
We are now working on a version 1.1 (and nightly builds will be available next week. Version 1.1 will add the OpenSolaris 2009.05 target, an optimized installer with Pack200 technology to reduce the download size by almost 2!, the JAX-WS and JAX-RS Jersey RestFul GlassFish Plugins, Maven 2, a MySQL JDBC driver pre registered for better out of the box experience with the MySQL database, the entire Java EE 6 Javadoc available in the Eclipse Editor code completion, and of course the latest bug fixes.
I hope to see you at JavaOne 2009.
Ludo