When Autowiring Spring Beans, a common exception is a BeanCreationException. This means that Spring found a bean to create, but was unable to fulfill the dependencies needed to create this this Spring bean. Here is an example of a BeanCreationException: BeanCreationException Exception in thread “main” org.springframework.beans.factory.BeanCreationException: Error creating bean with name ‘helloController’: Injection of autowired […]Continue reading
When Autowiring Spring Beans, a common error is to see a NoSuchBeanDefinitionException. Here is an example of the NoSuchBeanDefinitionException you may see thrown by the Spring context: NoSuchBeanDefinitionException Exception in thread “main” org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [guru.springframework.controllers.HelloController] is defined at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBean(DefaultListableBeanFactory.java:372) at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBean(DefaultListableBeanFactory.java:332) at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1060) By default, Spring will Autowire beans by type. You […]Continue reading
At the heart of the Spring Framework is its support of dependency injection through its Inversion of Control container. In this video, I look at using some of the advanced autowire features of Spring. @Primary By default, Spring will autowire by type. When you have more than one Spring Bean of a given type, you can […]Continue reading
I was recently asked on my Facebook page, “How do I become a Java Web Developer?” There is really no simple answer for this question. There are many facets to becoming a Java web developer. I’ve encountered Java developers who were good front end developers, or good backend developers. By ‘front end’, I mean more of […]Continue reading
Testing software has many meanings, which are often confused. In the last decade or so, we’ve seen agile development methodologies go mainstream in the modern enterprise. These methodologies are often misunderstood and misused. Some times they assume you have clean testable code. Often, when dealing with legacy applications, you simply don’t. I’ve encountered legacy Java […]Continue reading
