Implementing Web Services backed by a Database PL/SQL API using the Oracle Service Bus

Lucas Jellema 1

This article accompanies an article on the Architecture section of Oracle Technology Network (OTN): Implementing the Enterprise Service Bus Pattern to Expose Database Backed Services. It provides a detailed description of the implementation of the ESB architecture design pattern – the same that is introduced in the article on OTN […]

Some WebLogic Administration Essentialsbook reviews

Michel Schildmeijer

Some people were asked to review my book, here are some links: Edwin Biemond Jurgen Kress Markus Eisele Frank Muntz

Report from Oracle Open World – op maandag 17 oktober, 17.00 uur bij AMIS in Nieuwegein

Lucas Jellema

Het zal je niet zijn ontgaan dat vorige week in San Francisco Oracle Open World woedde. In een krappe week legde Oracle voor zo’n 45.000 bezoekers de strategie neer, de roadmap voor tientallen productlijnen en ook een serie nieuwe aankondigingen. De meest opvallende lanceringen: de Oracle Public Cloud, de Oracle […]

My Agenda for Oracle Open World 2011

Lucas Jellema

As the conference draws awfully close, I am trying to compose my final agenda. Some anchorpoints are my own sessions – those I have to attend. Then there is a number of special meetings that I will attend. The number of additional sessions I can just walk into is fairly […]

Screenscraping from Java using jsoup – effective data gathering from websites

Lucas Jellema 4

In a recent article I discussed screenscraping in a in hindsight fairly clumsy way ( While preparing for a series of articles on data visualizations, I had need of statistics regarding the Olympic Games – more specifically: the overall medal count per country during the 2008 Bejing Olympic Games. This […]

Tour de France 2011 – Analysis using ADF DVT Graphs – Part 3 – Distance, Speed and Withdrawals with Pareto, Combination, Stock Chart (High/Low) and Bubble Chart

Lucas Jellema 1

Another article on analyzing and visualizing the results from the Tour de France 2011 using the ADF DVT components. This article uses the same set of data already discussed in several previous articles – including the standings per stage as well as the overall standings after each stage. This article […]

Using JPA to persist the Tour de France Java Object Graph to relational database tables

Lucas Jellema 1

In a recent article – – I described how I retrieved the statistics for recent Tour de France editions from the official Tour de France website from my Java program and constructed an Java Object Graph for the data on stages, riders and rankings. In this article, I will […]

Turning any XML document into a Java Object graph using JAXB 2.0

Lucas Jellema 1

As a followup to my recent article on how to Produce and XML document based on data in a POJO structure using JAXB ( I will describe in this article how to go the reverse route: how to take any XML document and process it into a Java Object graph. […]

Leveraging HTML 5 Navigator API to show the browser's current location on an ADF Faces 11gR2 Thematic Map component

Lucas Jellema

This article demonstrates how, through a bit of JavaScript interacting with the HTML 5 Navigator API, some more JavaScript using the ADF Faces Rich Components API and the ADF Faces 11gR2 Thematic Map component, it becomes quite easy to not only learn about the end user’s physical location but to […]

Leveraging Spring Beans in ADF Faces applications and using the Spring PropertyPlaceholderConfigurer bean to dynamically configure bean properties from external files

Lucas Jellema 1

The Spring Framework is omnipresent in the world of Java applications. Many developers, teams and organizations make use of Spring for various reasons, such as its persistency support, the AOP features, the MVC framework or the remoting options or the security facilities. Underlying all of these is the bean container, […]

Hands-on: Synchronize your database from a webservice with JAX-WS and ADF Business Components

Frank Houweling

This step-by-step starter hands-on provides an example how to make a JAX-WS webservice proxy in JDeveloper, and save retrieved data from this webservice in a batch-job to your own database with ADF Business Components. Duration: 60 minutes. For this hands-on example, imagine that your company wants to expand internationally and […]

No JDBC based data retrieval in Java applications – RESTstyle, JSON formatted HTTP based interaction from Java to Database

Lucas Jellema 1

This article demonstrates how Java application can query data from relational databases (well, in this case more specifically the Oracle RDBMS) without the use of plain old JDBC but instead through a simple HTTP interaction with a RESTful service that returns the data in JSON format. In this way, issues […]

JavaOne 2010 presentation: Why and how to engage a Complex Event Processor from a Java Web Application

Lucas Jellema

Complex Event Processors are capable of handling large volumes of events – by filtering, aggregating or detecting patterns. Java Applications use a CEP to pre-process incoming signals. These applications can also generate the events – for example the user click and navigation behavior in the web application – and report […]