Injecting JSF artifacts

The JSF specification predates CDI. As such, many JSF artifacts, such as FacesContext and ExternalContext, had to be obtained via static entry methods; this resulted in hard-to-read boilerplate code. JSF 2.3 introduces the ability to inject JSF artifacts via CDI's @Inject annotation, as seen in the following example:

package net.ensode.javaee8book.jsfarbitrarymess; 
 
import java.io.Serializable; 
import javax.faces.application.FacesMessage; 
import javax.faces.context.FacesContext; 
import javax.faces.view.ViewScoped; 
import javax.inject.Inject; 
import javax.inject.Named; 
 
@Named 
@ViewScoped 
public class ArbitraryMessageController implements Serializable { 
 
    @Inject
    FacesContext facesContext; 
 
    public void saveData() { 
        FacesMessage facesMessage = new  
         FacesMessage(FacesMessage.SEVERITY_INFO, 
         "Data saved successfully", "All Data successfully  
          saved."); 
        facesContext.addMessage(null, facesMessage);...