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J2EE

A few weeks ago, Ed Burns posted a link to a blog on the JSF expert group mailing list, commenting “A nice one, but it doesn't mention JSF 2”. Ever the curmudgeon, I pointed out that it wasn't so nice that the blog's sample code used the JSF API in beans when it wasn't necessary—as does in fact a lot of sample code, even in the official Sun tutorials. Ed's response: “Cay,...
on Jan 3, 2010
As I happily wrote about new features of JSF 2.0, my coauthor David Geary kept asking me how to run the examples in Tomcat 6. I kept putting it off—hunting down all those JAR files and web.xml fragments is just too much like eating soup with a fork. I finally got around to doing the research and thought that others might benefit from the (unhappy) results, if only to realize that this may...
on Dec 29, 2009

Databases

On last saturday I have run a few experimental benchmarks on the typical new generation technology stack (or part of it). What I exactly did was running iAnywhere 10.0.1 database and Sun Application Server 9 (aka "Glassfish" aka "Java EE 5 SDK") in a VMware Server 1.0.3 virtual machine on my private laptop (AMD Turion 64 X2, 2 GB RAM). The benchmark was done using a small test...
on Jan 3, 2010
I used my free day to do some more performance benchmarking using EJB 3.0 and WebServices. As I wrote in my last blog entry on this topic, I was astonished what performance is possible even in a VM on my cheat laptop. But now I invested some more time to tune my laptop (running JkDefrag gave its disk an amazing push) and do an optimization in the application itself: Using precompiled queries...
on Jan 3, 2010
I did some experiments with JPA, which is a really cool and simple API for entity persistence. In fact, writing an entity bean is as simple as writing a pojo plus adding some single annotations like @Entity and @Id (to identify the PK fields). That's it. Cool. :-) See this sample code: @Entity public class MySample { @Id private int x; public int getX() { return this.x; } public...
on Jan 3, 2010
JPA comes with a way of doing triggers, which is pretty cool: EntityListeners. It is a simple POJO that is annotated as EntityListener, and that gets linked to the triggering event by some outside glue. That outside glue can be an XML deployment descriptor (has nothing to do with the EJB 2.1 XML deployment descriptor; is nothing else but an override to the annotations found in the Java source...
on Jan 3, 2010
One of the many cool new features in Java EE 6, is support for the DataSourceDefinition annotation. The DataSourceDefinition annotation provides a way to define a DataSource and register it with JNDI. The annotation provided annotation elements for the commonly used DataSource properties. Additional standard and vendor specific properties may also be specified. So let us look at an example: @...
on Dec 10, 2009
While speaking at the Globalcode Developer's conference in Rio de Janeiro, I met a dynamic and intelligent student by the name of Thiago Diogo. Thiaogo presented his group's work on student project to provide a real, mission critical distributed application for his university, Universidade Federal Fulminense. They chose JSF 1.2 and Seam as a part of their stack. One idea Thiaogo shared with me...
on Nov 23, 2009

Programming

Several APIs demand that the user is implementing the .hashCode() method. The reason is that these APIs are using hash based containers (like HashMap) to have a fast means of managing lots of objects (always comparing objects using .equals() would need endless time). There are lots of standard implementations on the web, so the question is, what performance impact the implemenation of .hashCode...
on Jan 3, 2010
Java VM embodies continuations now (not in production, in a hacking mode :), This post shows how to write a non-blocking server with continuations. Why using continuation with non blocking IO There are two models when you deals with IO: the thread model: read and write calls block until they at least read one caracter or write the whole buffer, so one use thread to be able to...
on Nov 22, 2009

Security

After configuring Hudson to run in a Glassfish with security manager enabled I started to have problems in other applications, specially web applications using reflection to access private fields in Java classes. Over the web I noticed a lot of people struggling with the same issue (Seam, GWT, Vaadin, etc). The problem is caused because most of the modern frameworks tries to access Java...
on Jan 2, 2010
Due to recent problems on java.net blogging platform you can find the article here: http://aloiscochard.blogspot.com/2009/12/integrating-spring-security-wit...
on Dec 19, 2009

Community

In November, Servlet 3.0 Specification Lead Rajiv Mordani, and I started providing technical advice to the team at Sun developing the successor to the Sun Certified Web Component (SCWD) certification exam. This new exam covers Java EE 6, including JSF 2. All this week, the work will continue in the form of an offsite workshop at the mansion. To help ensure the highest quality exam possible (and...
on Dec 18, 2009
Over the past decade, OpenSource became a big hype. At the peak of the hype, big stakeholders like IBM, Oracle and Sun (and even Microsoft and SAP) turned a lot of their previously proprietary code into OpenSource. While they tell us that they do it because they are so noble and like to exploit the community's knowledge, typically the open sourced software is only for free in part or is still...
on Dec 10, 2009
I authored a new refcard covering GlassFish v3, This refcard is different from my previous one which covers GlassFish v2. This new refcard discuss the following items:   Introduction to GlassFish application server v3. GlassFish v3 versions, installation and directory structure. Glassfish v3 daily administration tasks. Glassfish v3 Restful interface for monitoring and administration. GlassFish...
on Nov 22, 2009

EJB

The long awaited and the most looked upon version of GlassFish released today. GlassFish v3 fully implements Java EE 6 specification which means EJB 3.1, Servlet 3, JAX-RS, JPA 2, Contexts and Dependency Injection for Java EE, Bean validation, Java EE profiles and so on.  GlassFish is not only the most up to date application server but it also benefits from a very good architecture. GlassFish...
on Dec 17, 2009
NetBeans 6.8 released coordinated with GlassFish v3 today. NetBeans 6.8 can be considered a fine step ahead of NetBeans because Sun is officially supporting the NetBeans RCP platform as a product from now on. NetBeans 6.8 features are as follow: Java Enterprise Edition 6 support Web Projects with JavaServer Faces 2.0 (Facelets) JavaFX 1.2.1 support Kenai.com: Connected Developer Full support...
on Dec 17, 2009
This is a very basic review of active and available open source Java EE Application servers and Servlet container (Web containers) to let the community know which active containers are available and what is the general status of each container. The article can simply act as a start point for anyone need to select one of them for later use in development or product. Detailed comparison of these...
on Nov 17, 2009

Web Applications

This blog has moved here var gaJsHost = (("https:" == document.location.protocol) ? "https://ssl." : "http://www."); document.write(unescape("%3Cscript src='" + gaJsHost + "google-analytics.com/ga.js' type='text/javascript'%3E%3C/script%3E")); var pageTracker = _gat._getTracker("UA-3111670-3"); pageTracker._initData(); pageTracker._trackPageview();
on Dec 15, 2009

Instant Messaging

CommunicationBean defined in SailFin CAFE act as the listener for any communication events. For example, in case of instant messaging between two SIP clients, a CommunicationBean would intercept all the messages. These messages are available to the CommunicationBean implementation as POJO. That also mean that, you can implement the business logic in the CommunicationBean. This example...
on Nov 27, 2009