By Ken Finnigan
CDI simplifies dependency injection for contemporary software builders by means of profiting from Java annotations and relocating clear of advanced XML, whereas even as delivering an extensible and robust programming model.
«JBoss Weld CDI for Java Platform» is a pragmatic consultant to CDIs dependency injection strategies utilizing transparent and easy-to-follow examples. this can assist you benefit from the ability in the back of CDI, in addition to supplying an organization realizing of the way to take advantage of it inside your functions.
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Additional info for JBoss Weld CDI for Java Platform
Weld provides an implementation of InjectionPoint with @Dependent scope and @Default qualifier for us to retrieve the metadata. The injection point provides the following functions: • getBean(): This returns the Bean object of the bean defined on the injection point • getType(): This returns the bean type of the injection point • getQualifiers(): This returns all the qualifiers of the injection point • getMember(): This returns a different instance depending on whether the injection point utilizes field injection (Field), method parameter injection (Method), or constructor parameter injection (Constructor) • getAnnotated(): This returns AnnotatedField for field injection or AnnotatedParameter for method and constructor parameter injection When we have an @Dependent scoped bean, there are occasions when it needs to retrieve metadata about the injection point to be properly constructed.
All the built-in scopes are specified with one of these scope types, and they can also be used to create our own scope, which we will see later in the chapter. A normal scope is declared with @NormalScope to indicate to the container that a client proxy is required. It has a single attribute, which specifies whether the scope is passivating or not; that is, whether a bean that uses this scope is able to be passivated to secondary storage. @RequestScoped, @SessionScoped, @ApplicationScoped, and @ConversationScoped are all examples of scopes with a normal scope type.
We will refer to the location where we installed Glassfish as GLASSFISH_HOME. html. As Glassfish uses OSGI bundles for the various pieces that make up the entire server environment, the download of JBoss Weld from earlier does not contain an appropriate JAR that we can use as a replacement for the server. jar. jar, essentially removing all reference to the version of the file, as that is the name of the file we need to replace within Glassfish. jar into GLASSFISH_HOME\ glassfish\modules and replace the existing file of that name.