Articles

In this tutorial we’re going to modify an existing Java Server Faces / JSF 2 web application by adding rich UI components to the existing layout. Our tool of choice here is the PrimeFaces framework. It offers a wide range of interesting, customizable and (several) Ajax-enabled components that blend very well with JSF1+2 and also a solid documentation that allows a quick integration into existing projects. Project setup For this tutorial we’re going to reuse the web application from my JSF2 Tutorial “Java Server Faces/JSF 2 Tutorial – Step 1: Project setup, Maven and the first Facelet” – the source code is available at GitHub.org. ...

You’re using the popular Confluence wiki? You’re using its RPC/SOAP API and missing a function you really need? Just extend the capabilities of the Confluence RPC API by programming a custom web service component – it is really easy and also well documented. In this tutorial we’re going to take a look on how to quickly implement a SOAP service, securing it and putting its methods in a transactional context. Prerequisites Maven >=2 JDK >= 5 Confluence Wiki >= 3.0 (for a quick installation guide take a look at this article) SoapUI for Testing ...

Today we’re going to take a look at the world of object-relational Mapping and how it is done using the Java Persistence API by creating some basic examples, mapping some relations and querying objects using JPQL or the Criteria API.. Prerequisites Java 6 JDK Maven >= 2 If you’d like to take a look behind the scenes e.g. how entities are mapped in your database you could install a RDBMS of your choice .. or just use Derby/JavaDB that is bundled with the JDK 6 ...

Animations add some spice to our Android applications and the offered animation framework makes it easy to create custom animations and tweens. So lets dance around and create some animations ;) .. About There are two ways to create animations – via XML declaration or in a Java class. We’re going to focus on XML declaration – if you’re interested in java based declaration – take a look at the Android JavaDocs and the subclasses of android.view.animation.Animation. ...

It is possible to create SOAP webservices with only a few lines of code using the JAX-WS annotations. In a productivity environment you might prefer using contract-first instead of code-first to create your webservice but for now we’re going to use the fast method and that means code-first and annotations olé! Creating the SOAP Service Create a class SampleService with two public methods Annotate this class with @WebService (javax.jws.WebService) – now all public methods of this class are exported for our SOAP service To change the name of an exported method, annotate the method with @WebMethod(operationName = “theDesiredName”) (javax.jws.WebMethod) Finally the service class could look like this package com.hascode.tutorial.soap; import javax.jws.WebMethod; import javax.jws.WebService; @WebService public class SampleService { @WebMethod(operationName = "getInfo") public String getInformation() { return "hasCode.com"; } public String doubleString(String inString) { return inString + inString; } } ...

Having read an interesting comparison by Lindenlabs evaluating modern message broker systems like ActiveMQ, ApacheQpid and amongst others – RabbitMQ – I wanted to take a quick look at the last one and built a small application producing and consuming some sample messages. If you need some lecture on getting started with RabbitMQ or the key concepts of messaging I strongly recommend reading this list of introductional articles from the RabbitMQ homepage. ...

There is still the urban myth that using Spring IoC container without thousands lines of XML code isn’t possible – so today we’re taking a look at annotation based configuration with Spring 3 and of course we’re using Maven.. Setup your project Create a simple Maven project using mvn archetype:generate // or mvn archetype:create Add a lot of dependencies and reference them to the Spring version defined as a property in your pom.xml. A good reference on Spring 3 and Maven artifacts can be found at Springsource.com <properties> <org.springframework.version>3.0.0.RELEASE</org.springframework.version> </properties> <dependencies> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-core</artifactId> <version>${org.springframework.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-expression</artifactId> <version>${org.springframework.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-beans</artifactId> <version>${org.springframework.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-aop</artifactId> <version>${org.springframework.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context</artifactId> <version>${org.springframework.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context-support</artifactId> <version>${org.springframework.version}</version> </dependency> <dependency> <groupId>org.aspectj</groupId> <artifactId>com.springsource.org.aspectj.runtime</artifactId> <version>1.6.8.RELEASE</version> </dependency> </dependencies> ...

Today we’re going to take a look at Google’s App Inventor feature that offers programming-novices a nice possibility to enter the fabulous world of Android App programming without deeper knowledge of the API or complex SDK installations. So lets build some stuff .. Prerequisites Java 6 JDK App Inventors Extras Software A Google App Inventor Beta Account – request one here What we are going to build We are building a simple GUI with a Textbox and a button A click on the button starts an event that queries the acceleration sensor for coordinates If the sensor is active and enabled then the coordinates are displayed in the text box ...

In this tutorial we will take a look at the development of a simple OSGi Web Application and what tools can save us some time. The Maven Bundle Plugin makes our life much easier here as does the OSGi Bundle Repository that offers some nice bundles – in our case the servlet API and an embedded Jetty web server. So lets develop some bundles .. Prerequisites You are going to need a JDK (>=5), Maven2, the Apache Felix OSGi implementation and and text editor/http://eclipse.org/[IDE] of your choice. ...

Since Confluence 3.2. there is a new plugin module type that allows you to deploy templates in a bundle via the plugin API. In addition it is possible to assign these templates to specific spaces and preview available templates in the Confluence administration area. So let’s build some sample templates.. Creating a Template Bundle Plugin Creating a template bundle is easy – just create a class implementing TemplatePackage – there are two methods: one returns a list of bundled PageTemplate Objects the other the name for the template bundle. ...