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Minilang and OFBiz

by Jonathon Wong Rupert Howell | November 2008 | Java Open Source

Minilang can help developers to reduce the time it takes to implement simple and repetitive tasks. Code does not need to be compiled and can therefore be implemented faster, breaking the typical Java code-compile-test cycle. Minilang gives the advantage of being able to change the code without a restart of the application. A simple browser refresh is enough to see the changes.

It is more "plain English" than Java code and is simpler to read and therefore easier to understand and maintain by people who may be unfamiliar with the system.

The main reason for Minilang's existence is to facilitate simple operations, notably CRUD operations and to validate and manipulate data. It should not be much used outside of this scope, but within this scope, it excels.

In this article by Jonathon Wong and Rupert Howell we will be looking at:

  • Minilang syntax and schema
  • Defining and creating a "Simple Service" using Minilang
  • Simple events
  • Validating and converting fields using the simple-map-processor
  • Security in Minilang
  • Invoking other services, methods, events, and BeanShell from Minilang
  • Using Minilang in screen widgets
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Interacting with Databases through the Java Persistence API

by Suhreed Sarkar | November 2008 | Joomla! MySQL Content Management Open Source PHP

The Java Persistence API (JPA) is an object relational mapping API. Object relational mapping tools help us automate mapping Java objects to relational database tables. Earlier versions of J2EE used Entity Beans as the standard approach for object relational mapping. Entity Beans attempted to keep the data in memory always synchronized with database data, a good idea in theory, however, in practice this feature resulted in poorly performing applications.

Several object relational mapping APIs were developed to overcome the limitations of Entity Beans, such as Hibernate, iBatis, Cayenne, and Toplink among others.

With Java EE 5, Entity Beans were deprecated in favor of JPA. JPA took ideas from several object relational mapping tools and incorporated them into the standard. As we will see in this article by David Heffelfinger, NetBeans has several features that make development with JPA a breeze.

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Web Scraping with Python

by Javier Collado | November 2008 | Open Source

Web scraping is the set of techniques used the to get some information, structured only for presentation purposes, from a website automatically instead of copying it manually. This article by Javier Collado will show how this could be done using python in the steps that require some development.

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ASP.NET MVC Framework

by Vivek Thakur | November 2008 | .NET Architecture & Analysis Microsoft

These days, Model View Controller (MVC) is a buzzword in the ASP.NET community, thanks to the upcoming ASP.NET MVC Framework that Microsoft is expected to launch soon. The Framework allows easier adoption of the different MVC patterns in our web applications.In this article by Vivek Thakur, we discuss ASP.NET MVC Framework in detail with the help of a Sample Project. We also take a glance at Unit Testing with reference to ASP.NET MVC Framework.

The ASP.NET MVC framework was released by Microsoft as an alternative approach to webforms when creating ASP.NET based web applications. The ASP.NET MVC framework is not a replacement or upgrade of webforms, but merely another way of programming your web applications so that we can get the benefits of an MVC design with much less effort.

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Obtaining Alfresco Web Content Management (WCM)

by Jeff Potts | November 2008 | Content Management Open Source

People have been using Alfresco to manage web content since the early days of the product. In 2007, Alfresco released its formal web content management functionality that added features most people expect when they think of a Web Content Management (WCM) offering, including templating, site preview, snapshots, virtualization, and deployment. WCM is a specialized subset of the larger Enterprise Content Management (ECM) umbrella that is focused specifically on authoring, managing, and publishing files used to produce a website.

In this article by Jeff Potts, we will discuss how to create a web project and define web forms using XML Schema to allow non-technical users to create content.

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