In order for the CoreMedia CAE to instantiate the right classes at runtime, they need to be configured with the factory. The engine's default factory implementation uses the Spring application context to instantiate content beans. This way content beans can participate in Spring's dependency injection mechanism - for example, they can receive references to other services without having to resort to service lookups in JNDI or the servlet context.

The content type to content beans mapping is defined using Spring’s XML notation. It should contain a prototype definition for each class corresponding to a document type.

Prototype definitions follow a specific naming scheme. In order to be found by the factory, they must be given the same name as the factory, followed by a colon ‘:’ and the name of the document type for which they were used. For example, a class com.company.Article that represents Article documents is registered with the factory as follows:

<bean
   name="contentBeanFactory:Article"
   parent="abstractContentBean"
   scope="prototype"
   class="com.company.ArticleImpl "/>

This line is a template for the content bean factory; it says:

In short this reads as: "for documents of type Article, return a new instance of class com.company.ArticleImpl".

Note

Important: using scope="prototype" is vital, otherwise Spring would cache one instance and return the same object every time.