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J2EE

GlassFish v3 comes bundled with Metro - a secure, reliable, transactional, and .NET interoperable Web services stack. Metro is compliant with JAX-WS and provides additional quality of service attributes that can be easily enabled using NetBeans IDE. This blog contains a screencast that shows how to create a simple Web service using NetBeans 6.8, implement the business logic by accessing a...
on Feb 2, 2010

Programming

Christmas holidays is one of my favourite moment in the year, I have time to see my relatives, read books, play with my kids and hack a little bit. Forewords I think I don't like the most in the strawman proposal is that the syntax for function type and for lambda literal reuse the same symbol '#'. It's something that I've observed when teaching C. The C syntax use * when you...
on Dec 27, 2009
We can't live without Javadoc, but even if it useful, it's not complete. One missing thing is UML within the Javadoc. To add UML to your Javadoc, is quite simple. You need to add Graphviz into your maven build. First you need to download and install Graphviz. Go there Graphviz After that you should add the variable GRAPHVIZ_HOME (that point to the installation folder) into your system. The...
on Dec 26, 2009
So, I just attended Edge East 2004, a Web Services Conference here in scenic Boston. Full disclosure: I'm not exactly the world's biggest fan of the Web Services. My ten cents going in: they solve a very complex problem in a very complex way. And thus, they are to be feared. If you can, by any means, solve a simpler problem in a simpler way, you'll be happier. If you can, by any means, solve...
on Feb 26, 2004

Community

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

Web Services and XML

In this post i would like to provide a brief summary of some of the Propietary Features and implementation details of SAAJ 1.3.4 that are not necessarily related to the SAAJ API specifications.  Creating SOAPMessages with Very Large XML Payload The JavaDoc  of the API method SOAPMessage.saveChanges() poses a problem for the implementation by specifying that "All MIME headers in a...
on Dec 10, 2009
A small JAXB puzzle: how to define a custom element to serialize Date objects with the TimeZone information? Piece of cake, isn't it? Try it yourself and you will be surprised with the tricky details. A friend of mine gave me a JAXB challenge this week: his company already uses a customization of the xsd:date type in a legacy code - mapped to a proprietary type instead of the default Calendar...
on Dec 6, 2009
Registration is one of most implemented use cases ever, but things get a bit different when you try to implement it in a RESTful Web-Service. Before I start the discussion about the registration use case, a list of terms for disambiguation: Application means a Java EE Application. (Arena-PUJ is the Java EE Application I am doing my REST experiments) Service is a RESTful Web-Service. (back-end...
on Oct 2, 2009
Rule of thumb: Avoid to use {variables} as the first path of a Jersey's @Path I am working on the Arena PUJ Project, a RESTful web-service to support PUJ competitions. We are in the early stages of the project but we already got some resources published on the web. Let me show you a few URL samples: An insecure GET method to read all competitions promoted by a JUG: GET /{competition_id}/...
on Sep 17, 2009

Databases

The W3C Social Web Incubator Group is organizing a free Bar Camp in the Santa Clara Sun Campus on November 2nd to foster a wide ranging discussion on the issues required to build the global Social Web. Imagine a world where everybody could participate easily in a distributed yet secure Social Web. In such a world every one will be able to control their own information, and every business would...
on Oct 26, 2009

Research

I am working out a new pet project, an online system to support PUJ Competitions. It is still a work under progress and I plan to start to blog some technical results here, but until that glorious free time I would give you a glimpse about what is keeping my blog so quiet :) So, PUJ is an academic competition where undergraduate student submit their homeworks for the evaluation...
on Sep 7, 2009

Distributed

Java Champion Alan Williamson posted "A Simple Java class for Amazon SimpleSQS": "With such a beautiful service such as the Amazon Simple Queue Service, it shouldn't be wrapped up with a lot of complicated layers of classes for utilizing. That is why I developed the simple POJO, single class method for utilising Amazon SQS from within Java..."
on Aug 31, 2009