The Builder pattern and the Spring framework
Introduction In this article, we are going to see how we can use the Builder pattern when creating beans with the Spring framework. I like to make use of the builder pattern whenever an object has both mandatory and optional properties. But building objects is usually the Spring framework responsibility, so let’s see how you can employ it using both Java and XML-based Spring configurations.
Why I like Spring bean aliasing
Spring framework is widely used as a dependency injection container, and that’s for good reasons. First of all, it facilitates integration testing and it gives us the power of customizing bean creation and initialization (e.g. @Autowired for List types). But there is also a very useful feature, that might get overlooked and therefore let’s discuss about bean aliasing. Bean aliasing allows us to override already configured beans and to substitute them with a different object definition. This is most useful when the bean definitions are inherited from an external resource, which is… Read More
Why I like Spring @Autowired for List types
Spring Framework dependency injection is great, and almost every Java developer uses it nowadays. Using @Autowired to inject Java Beans is trivial, but we can also use this annotation for java.util.List, or java.util.Map as well. The former will inject a list of all Java Beans matching the List’s Generic type, while the latter will create a map of these beans mapped by their names. How I’ve been taking advantage of this feature? Since I was developing an application which has a framework module and a specific customer implementation module, there were cases… Read More
